"use strict";

const PAGE_SIZE = 24;
const ADMIN_REFRESH_INTERVAL = 60000;
const STATE_KEY = "ics2ResearcherWorkspace";
const DOCUMENTATION_DONE_KEY = "ics2DocumentationCompleted";
const FORM_URL = "https://drive.google.com/file/d/1BEJ3qrqB3RMvhw4Z0i4dxZiwEreT9cJc/view?usp=sharing";
const MADON_GROUP_URL = "https://chat.whatsapp.com/CeSJId4TjanKJk7xAMWOAg?mode=gi_t";

const REPRESENTATIVES = [
  { match: ["الصناعية الأولى", "الصناعية الاولى"], city: "المدينة الصناعية الأولى بالدمام", name: "يوسف العباد", phone: "0501444214" },
  { match: ["الصناعية الثانية"], city: "المدينة الصناعية الثانية بالدمام", name: "سالم بوسوده", phone: "0560503707" },
  { match: ["الصناعية الثالثة"], city: "المدينة الصناعية الثالثة بالدمام", name: "إبراهيم الغامدي", phone: "0555309388" },
  { match: ["الأحساء", "الاحساء", "العيون", "واحة مدن"], city: "المدينة الصناعية الأولى بالأحساء", name: "أحمد الخليفة", phone: "0506448053" },
  { match: ["حفر الباطن"], city: "المدينة الصناعية بحفر الباطن", name: "براك المطيري", phone: "0540055303", role: "مدير المدينة الصناعية بحفر الباطن" },
];

const ICONS = {
  copy: "M8 8h11v11H8z M5 16H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1",
  map: "M12 21s7-4.6 7-11a7 7 0 1 0-14 0c0 6.4 7 11 7 11Z M12 12.5a2.5 2.5 0 1 0 0-5 2.5 2.5 0 0 0 0 5Z",
  whatsapp: "M20.5 11.5a8.5 8.5 0 0 1-12.6 7.4L3 20l1.2-4.7A8.5 8.5 0 1 1 20.5 11.5Z M8.6 8.7c.2 3.3 2.7 5.8 6 6.2",
};

const elements = Object.fromEntries(
  [
    "loginView", "loginForm", "password", "togglePassword", "loginButton", "loginError",
    "researcherView", "researcherSearch", "researcherGrid", "entitySearchResults",
    "researcherModeButton", "entityModeButton", "dashboardView", "researcherName",
    "switchResearcherButton", "logoutButton", "summaryStats", "researcherMapLink", "formLink",
    "shareFormButton", "representativesDirectory", "toggleContactsButton", "cityButtons", "searchInput", "statusSelect", "locationSelect",
    "clearFiltersButton", "resultsMeta", "resultsTitle", "samplesGrid",
    "noResults", "loadMoreWrap", "loadMoreButton", "loadMoreMeta", "toast",
    "selectionBar", "selectionCount", "clearSelectionButton", "sendSelectionButton",
    "shareDialog", "closeShareDialog", "shareForm", "recipientPhone", "recipientPhoneError",
    "messagePreview", "copyShareMessage", "sendShareButton",
    "madonDialog", "closeMadonDialog", "madonForm", "madonRepresentativeOptions",
    "madonMessagePreview", "copyMadonMessage", "openMadonGroup", "sendMadonMessage",
    "documentationDialog", "documentationDialogTitle", "closeDocumentationDialog", "documentationEntity",
    "documentationUnavailable", "documentationForm", "fieldStatus", "otherStatusField", "otherStatus", "fieldStatement",
    "statementCount", "documentationPhotos", "photoPreviews", "documentationError",
    "uploadProgress", "uploadProgressBar", "cancelDocumentationButton", "saveDocumentationButton",
    "adminView", "adminLogoutButton", "adminUpdatedAt", "adminSyncStatus", "refreshAdminButton", "adminStats", "adminInsight",
    "adminProgressOverview", "adminTrendTotal", "adminTrendChart", "adminCityProgress",
    "adminControls", "adminSearch", "adminResearcherFilter", "adminCityFilter", "adminDateFilter",
    "adminStatusFilter", "clearAdminFilters", "activeResearchersCount",
    "researcherProductivity", "adminRecordsCount", "adminRecords", "adminEmpty",
  ].map((id) => [id, document.getElementById(id)]),
);

let payload = null;
let activeResearcher = null;
let researcherRows = [];
let visibleRows = [];
let renderedCount = 0;
let toastTimer;
let shareRow = null;
let madonRow = null;
let selectedRepresentative = null;
const selectedRows = new Set();
let isBulkMadonMessage = false;
let sessionAccessCode = "";
let documentationRow = null;
let documentationFiles = [];
let documentationExistingPhotos = [];
let documentationRecords = [];
let lastSavedRowId = "";
let adminRefreshTimer = null;
let adminRefreshInProgress = false;
let adminDashboardInitialized = false;
let newAdminRecordIds = new Set();
let adminRecords = [];
let directoryMode = "researcher";
const mobileQuery = window.matchMedia("(max-width: 560px)");

function base64ToBytes(value) {
  const binary = atob(value);
  return Uint8Array.from(binary, (char) => char.charCodeAt(0));
}

async function deriveKey(password, salt) {
  const material = await crypto.subtle.importKey(
    "raw",
    new TextEncoder().encode(password),
    "PBKDF2",
    false,
    ["deriveKey"],
  );
  return crypto.subtle.deriveKey(
    { name: "PBKDF2", salt, iterations: ENCRYPTED_DATA.iterations, hash: "SHA-256" },
    material,
    { name: "AES-GCM", length: 256 },
    false,
    ["decrypt"],
  );
}

async function decryptData(password, encryptedSource = ENCRYPTED_DATA) {
  const salt = base64ToBytes(encryptedSource.salt);
  const iv = base64ToBytes(encryptedSource.iv);
  const combined = base64ToBytes(encryptedSource.payload);
  const cipherText = combined.slice(0, -16);
  const authTag = combined.slice(-16);
  const encrypted = new Uint8Array(cipherText.length + authTag.length);
  encrypted.set(cipherText);
  encrypted.set(authTag, cipherText.length);
  const keyMaterial = await crypto.subtle.importKey(
    "raw",
    new TextEncoder().encode(password),
    "PBKDF2",
    false,
    ["deriveKey"],
  );
  const key = await crypto.subtle.deriveKey(
    { name: "PBKDF2", salt, iterations: encryptedSource.iterations, hash: "SHA-256" },
    keyMaterial,
    { name: "AES-GCM", length: 256 },
    false,
    ["decrypt"],
  );
  const plain = await crypto.subtle.decrypt({ name: "AES-GCM", iv }, key, encrypted);
  return JSON.parse(new TextDecoder().decode(plain));
}

function normalize(value) {
  return String(value ?? "")
    .normalize("NFKD")
    .replace(/[\u064B-\u065F\u0670]/g, "")
    .replace(/[أإآ]/g, "ا")
    .replace(/ى/g, "ي")
    .replace(/ة/g, "ه")
    .replace(/\s+/g, " ")
    .trim()
    .toLowerCase();
}

function uniqueSorted(values) {
  return [...new Set(values.filter(Boolean))].sort((a, b) =>
    String(a).localeCompare(String(b), "ar", { sensitivity: "base" }),
  );
}

function createIcon(path) {
  const svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
  svg.setAttribute("viewBox", "0 0 24 24");
  svg.setAttribute("aria-hidden", "true");
  const element = document.createElementNS("http://www.w3.org/2000/svg", "path");
  element.setAttribute("d", path);
  svg.append(element);
  return svg;
}

function showToast(message) {
  clearTimeout(toastTimer);
  elements.toast.textContent = message;
  elements.toast.classList.add("show");
  toastTimer = setTimeout(() => elements.toast.classList.remove("show"), 4000);
}

function documentationReady() {
  return Boolean(
    typeof DOCUMENTATION_CONFIG === "object" &&
      /^https:\/\/script\.google\.com\/macros\/s\/.+\/exec$/.test(DOCUMENTATION_CONFIG.endpoint),
  );
}

async function fetchDocumentation(action, accessCode) {
  if (!documentationReady()) throw new Error("خدمة التوثيق غير متاحة.");
  const url = new URL(DOCUMENTATION_CONFIG.endpoint);
  url.searchParams.set("action", action);
  url.searchParams.set("accessCode", accessCode);
  const response = await fetch(url);
  const result = await response.json();
  if (!result.ok) throw new Error(result.error || "تعذر مزامنة بيانات التوثيق.");
  return result;
}

function latestRecordsBySample(records) {
  const map = new Map();
  records.forEach((record) => {
    if (!record.sampleKey || map.has(record.sampleKey)) return;
    map.set(record.sampleKey, record);
  });
  return map;
}

function latestRecordsByCommercialRecord(records) {
  const map = new Map();
  records.forEach((record) => {
    if (!record.commercialRecord || map.has(record.commercialRecord)) return;
    map.set(record.commercialRecord, record);
  });
  return map;
}

function documentationRecord(row) {
  return (
    latestRecordsBySample(documentationRecords).get(row.sampleKey) ||
    latestRecordsByCommercialRecord(documentationRecords).get(row.commercialRecord)
  );
}

function hydrateRecordKeys(records) {
  const currentKeys = new Set(payload?.rows.map((row) => row.sampleKey) || []);
  return records.map((record) => {
    if (record.sampleKey && currentKeys.has(record.sampleKey)) return record;
    const match = payload?.rows.find((row) => {
      if (record.commercialRecord && row.commercialRecord === record.commercialRecord) {
        return true;
      }
      return (
        normalize(row.establishmentName) === normalize(record.establishmentName) &&
        (!record.contractNumber || row.contractNumber === record.contractNumber)
      );
    });
    return {
      ...record,
      sampleKey: match?.sampleKey || record.sampleKey || "",
      researcher: match?.researcher || record.researcher,
    };
  });
}

function preserveDocumentedRows(records) {
  if (!payload?.rows?.length || !Array.isArray(records) || !records.length) return;
  const existingKeys = new Set(payload.rows.map((row) => row.sampleKey));
  const existingCommercialRecords = new Set(payload.rows.map((row) => row.commercialRecord).filter(Boolean));
  const extraRows = [];

  records.forEach((record) => {
    if (!record.sampleKey || existingKeys.has(record.sampleKey) || !record.establishmentName) return;
    if (record.commercialRecord && existingCommercialRecords.has(record.commercialRecord)) return;
    existingKeys.add(record.sampleKey);
    if (record.commercialRecord) existingCommercialRecords.add(record.commercialRecord);
    extraRows.push({
      researcher: record.researcher || "غير محدد",
      establishmentName: record.establishmentName,
      contractNumber: record.contractNumber || "لا يوجد رقم عقد",
      city: record.city || "غير محدد",
      sourceCity: record.city || "غير محدد",
      representativeCity: record.city || "غير محدد",
      status: record.fieldStatus || "توثيق سابق",
      madonStatement: "",
      madonNoteText: "",
      coordinates: "",
      locationType: "none",
      commercialRecord: record.commercialRecord || "",
      unifiedNumber: "",
      activityCode: "",
      activity: "",
      sampleKey: record.sampleKey,
      preservedDocumentation: true,
    });
  });

  if (!extraRows.length) return;
  payload.rows = [...payload.rows, ...extraRows];
  const counts = new Map();
  payload.rows.forEach((row) => counts.set(row.researcher, (counts.get(row.researcher) || 0) + 1));
  const researchers = new Map(payload.researchers.map((researcher) => [researcher.name, researcher]));
  counts.forEach((count, name) => {
    const existing = researchers.get(name);
    researchers.set(name, {
      name,
      count,
      mapUrl: existing?.mapUrl || "",
    });
  });
  payload.researchers = [...researchers.values()].sort((a, b) =>
    a.name.localeCompare(b.name, "ar", { sensitivity: "base" }),
  );
}

function riyadhToday() {
  return new Intl.DateTimeFormat("en-CA", {
    timeZone: "Asia/Riyadh",
    year: "numeric",
    month: "2-digit",
    day: "2-digit",
  }).format(new Date());
}

function dateOffset(dateValue, offset) {
  const [year, month, day] = dateValue.split("-").map(Number);
  const date = new Date(Date.UTC(year, month - 1, day + offset));
  return [
    date.getUTCFullYear(),
    String(date.getUTCMonth() + 1).padStart(2, "0"),
    String(date.getUTCDate()).padStart(2, "0"),
  ].join("-");
}

function adminSnapshot() {
  const records = [...latestRecordsBySample(adminRecords).values()];
  const recordMap = new Map(records.map((record) => [record.sampleKey, record]));
  const commercialRecordMap = latestRecordsByCommercialRecord(records);
  const today = riyadhToday();
  const yesterday = dateOffset(today, -1);
  const documented = payload.rows.filter((row) =>
    recordMap.has(row.sampleKey) ||
    Boolean(row.commercialRecord && commercialRecordMap.has(row.commercialRecord)),
  );
  const todayRecords = records.filter((record) => record.documentedDate === today);
  const yesterdayRecords = records.filter((record) => record.documentedDate === yesterday);
  const activeToday = new Set(todayRecords.map((record) => record.researcher).filter(Boolean));
  return {
    records,
    recordMap,
    commercialRecordMap,
    today,
    yesterday,
    documented,
    todayRecords,
    yesterdayRecords,
    activeToday,
    percentage: payload.rows.length ? (documented.length / payload.rows.length) * 100 : 0,
  };
}

async function syncResearcherDocumentation() {
  try {
    const result = await fetchDocumentation("status", sessionAccessCode);
    documentationRecords = hydrateRecordKeys(result.records || []);
    preserveDocumentedRows(documentationRecords);
  } catch (error) {
    console.warn(error.message);
    documentationRecords = [];
  }
}

function adminStat(value, label, note = "") {
  const item = document.createElement("article");
  item.className = "admin-stat";
  const strong = document.createElement("strong");
  strong.textContent = value;
  const span = document.createElement("span");
  span.textContent = label;
  item.append(strong, span);
  if (note) {
    const small = document.createElement("small");
    small.textContent = note;
    item.append(small);
  }
  return item;
}

function setAdminFilterOptions() {
  const selectedResearcher = elements.adminResearcherFilter.value;
  const selectedCity = elements.adminCityFilter.value;
  const selectedStatus = elements.adminStatusFilter.value;
  setSelectOptions(
    elements.adminResearcherFilter,
    uniqueSorted(payload.researchers.map((item) => item.name)),
    "جميع الباحثين",
  );
  setSelectOptions(
    elements.adminCityFilter,
    uniqueSorted(payload.rows.map((row) => row.city)),
    "جميع المدن",
  );
  setSelectOptions(
    elements.adminStatusFilter,
    uniqueSorted(adminRecords.map((record) => record.fieldStatus)),
    "جميع الحالات",
  );
  if ([...elements.adminResearcherFilter.options].some((option) => option.value === selectedResearcher)) {
    elements.adminResearcherFilter.value = selectedResearcher;
  }
  if ([...elements.adminCityFilter.options].some((option) => option.value === selectedCity)) {
    elements.adminCityFilter.value = selectedCity;
  }
  if ([...elements.adminStatusFilter.options].some((option) => option.value === selectedStatus)) {
    elements.adminStatusFilter.value = selectedStatus;
  }
}

function adminRecordIdentity(record) {
  return record.documentationId || record.sampleKey || `${record.commercialRecord}|${record.establishmentName}`;
}

function setAdminSyncState(state, text) {
  elements.adminSyncStatus.className = `sync-status ${state}`;
  elements.adminSyncStatus.querySelector("span").textContent = text;
}

function renderAdminStats() {
  const snapshot = adminSnapshot();
  const inactiveToday = Math.max(payload.researchers.length - snapshot.activeToday.size, 0);
  elements.adminStats.replaceChildren(
    adminStat(payload.rows.length, "إجمالي العينات"),
    adminStat(snapshot.documented.length, "تم التوثيق", `${snapshot.percentage.toFixed(1)}% من الإجمالي`),
    adminStat(payload.rows.length - snapshot.documented.length, "المتبقي"),
    adminStat(snapshot.todayRecords.length, "إنجاز اليوم", snapshot.today),
    adminStat(snapshot.yesterdayRecords.length, "إنجاز أمس"),
    adminStat(snapshot.activeToday.size, "باحثون أنجزوا اليوم", `${inactiveToday} دون إنجاز اليوم`),
  );
  renderAdminInsight(snapshot, inactiveToday);
}

function renderAdminInsight(snapshot, inactiveToday) {
  const todayByResearcher = new Map();
  snapshot.todayRecords.forEach((record) => {
    if (!record.researcher) return;
    todayByResearcher.set(record.researcher, (todayByResearcher.get(record.researcher) || 0) + 1);
  });
  const leader = [...todayByResearcher.entries()].sort((a, b) => b[1] - a[1])[0];
  const difference = snapshot.todayRecords.length - snapshot.yesterdayRecords.length;
  const trendText = difference > 0
    ? `إنجاز اليوم أعلى من أمس بـ ${difference}`
    : difference < 0
      ? `إنجاز اليوم أقل من أمس بـ ${Math.abs(difference)}`
      : "إنجاز اليوم مماثل لأمس";
  const leaderText = leader
    ? `الأعلى اليوم: ${leader[0]} بعدد ${leader[1]}`
    : "لم يسجل أي إنجاز اليوم حتى الآن";

  elements.adminInsight.className = `admin-insight ${difference < 0 ? "needs-attention" : "positive"}`;
  elements.adminInsight.innerHTML = `
    <span class="admin-insight-icon">${difference < 0 ? "!" : "✓"}</span>
    <div>
      <strong>${trendText}</strong>
      <p>${leaderText} · ${inactiveToday} باحث دون إنجاز اليوم.</p>
    </div>`;
}

function renderAdminOverview() {
  const snapshot = adminSnapshot();
  const remaining = Math.max(payload.rows.length - snapshot.documented.length, 0);
  const degrees = Math.min(snapshot.percentage, 100) * 3.6;
  elements.adminProgressOverview.innerHTML = `
    <div class="completion-ring" style="--progress:${degrees}deg">
      <div><strong>${snapshot.percentage.toFixed(1)}%</strong><span>مكتمل</span></div>
    </div>
    <div class="completion-legend">
      <p><i class="documented-dot"></i><span>موثق</span><strong>${snapshot.documented.length}</strong></p>
      <p><i class="remaining-dot"></i><span>متبقٍ</span><strong>${remaining}</strong></p>
      <small>تُحتسب النسبة من التوثيق الفعلي المسجل في Google Drive.</small>
    </div>`;

  const days = Array.from({ length: 7 }, (_, index) => dateOffset(snapshot.today, index - 6));
  const dayCounts = days.map((day) =>
    snapshot.records.filter((record) => record.documentedDate === day).length
  );
  const maxCount = Math.max(...dayCounts, 1);
  const weekTotal = dayCounts.reduce((sum, count) => sum + count, 0);
  const dayFormatter = new Intl.DateTimeFormat("ar-SA", {
    weekday: "short",
    timeZone: "UTC",
  });
  elements.adminTrendTotal.textContent = `${weekTotal} توثيق`;
  elements.adminTrendChart.replaceChildren(
    ...days.map((day, index) => {
      const item = document.createElement("div");
      item.className = "trend-day";
      const date = new Date(`${day}T12:00:00Z`);
      const height = dayCounts[index] ? Math.max((dayCounts[index] / maxCount) * 100, 12) : 3;
      item.innerHTML = `
        <strong>${dayCounts[index]}</strong>
        <span class="trend-bar"><i style="height:${height}%"></i></span>
        <small>${dayFormatter.format(date)}</small>`;
      if (day === snapshot.today) item.classList.add("today");
      return item;
    }),
  );

  const totalsByCity = new Map();
  payload.rows.forEach((row) => totalsByCity.set(row.city, (totalsByCity.get(row.city) || 0) + 1));
  const doneByCity = new Map();
  snapshot.documented.forEach((row) => doneByCity.set(row.city, (doneByCity.get(row.city) || 0) + 1));
  const cities = [...totalsByCity].map(([city, total]) => {
    const done = doneByCity.get(city) || 0;
    return { city, total, done, percent: total ? (done / total) * 100 : 0 };
  }).sort((a, b) => b.done - a.done || b.percent - a.percent || a.city.localeCompare(b.city, "ar"));
  elements.adminCityProgress.replaceChildren(
    ...cities.slice(0, 6).map((item) => {
      const button = document.createElement("button");
      button.type = "button";
      button.className = "city-progress-row";
      button.innerHTML = `
        <span class="city-progress-heading"><strong>${item.city || "غير محدد"}</strong><b>${item.done} / ${item.total}</b></span>
        <span class="city-progress-track"><i style="width:${item.percent}%"></i></span>
        <small>${item.percent.toFixed(1)}% مكتمل</small>`;
      button.addEventListener("click", () => {
        elements.adminCityFilter.value = item.city;
        renderAdminRecords();
        elements.adminControls?.scrollIntoView?.({ behavior: "smooth", block: "start" });
      });
      return button;
    }),
  );
}

function filteredAdminRecords() {
  const query = normalize(elements.adminSearch.value);
  const researcher = elements.adminResearcherFilter.value;
  const city = elements.adminCityFilter.value;
  const date = elements.adminDateFilter.value;
  const status = elements.adminStatusFilter.value;
  return adminRecords.filter((record) => {
    if (researcher && record.researcher !== researcher) return false;
    if (city && record.city !== city) return false;
    if (date && record.documentedDate !== date) return false;
    if (status && record.fieldStatus !== status) return false;
    if (!query) return true;
    return normalize(
      `${record.establishmentName} ${record.commercialRecord} ${record.researcher} ${record.city}`,
    ).includes(query);
  }).sort((a, b) => {
    const aTime = Date.parse(a.updatedAt || a.documentedAt || "") || 0;
    const bTime = Date.parse(b.updatedAt || b.documentedAt || "") || 0;
    return bTime - aTime;
  });
}

function renderProductivity() {
  const snapshot = adminSnapshot();
  const totals = new Map(payload.researchers.map((item) => [item.name, item.count]));
  const documented = new Map();
  const today = new Map();
  snapshot.records.forEach((record) => {
    documented.set(record.researcher, (documented.get(record.researcher) || 0) + 1);
    if (record.documentedDate === snapshot.today) {
      today.set(record.researcher, (today.get(record.researcher) || 0) + 1);
    }
  });
  const fragment = document.createDocumentFragment();
  const researchers = payload.researchers
    .map((item) => ({
      name: item.name,
      total: totals.get(item.name) || 0,
      done: documented.get(item.name) || 0,
      today: today.get(item.name) || 0,
    }))
    .sort((a, b) => b.done - a.done || b.today - a.today || a.name.localeCompare(b.name, "ar"));
  elements.activeResearchersCount.textContent = `${snapshot.activeToday.size} نشط اليوم`;
  researchers.forEach((item, index) => {
      const row = document.createElement("button");
      row.type = "button";
      row.className = "productivity-row";
      const percent = item.total ? (item.done / item.total) * 100 : 0;
      row.innerHTML = `
        <span class="productivity-rank">${index + 1}</span>
        <span class="productivity-identity">
          <strong class="productivity-name">${item.name}</strong>
          <small>${item.today ? `${item.today} اليوم` : "دون إنجاز اليوم"} · متبقي ${item.total - item.done}</small>
        </span>
        <span class="productivity-numbers"><strong>${item.done}</strong><small>من ${item.total}</small></span>
        <span class="productivity-track"><i style="width:${percent}%"></i></span>
        <span class="productivity-percent">${percent.toFixed(1)}%</span>`;
      row.addEventListener("click", () => {
        elements.adminResearcherFilter.value = item.name;
        renderAdminRecords();
      });
      fragment.append(row);
    });
  elements.researcherProductivity.replaceChildren(fragment);
}

function renderAdminRecords() {
  const records = filteredAdminRecords();
  const hasFilters = Boolean(
    elements.adminSearch.value ||
    elements.adminResearcherFilter.value ||
    elements.adminCityFilter.value ||
    elements.adminDateFilter.value ||
    elements.adminStatusFilter.value
  );
  elements.adminRecordsCount.textContent = hasFilters
    ? `${records.length} من ${adminRecords.length}`
    : `${records.length} عملية`;
  elements.adminEmpty.hidden = records.length > 0;
  const fragment = document.createDocumentFragment();
  records.slice(0, 100).forEach((record) => {
    const item = document.createElement("article");
    item.className = "admin-record";
    if (newAdminRecordIds.has(adminRecordIdentity(record))) item.classList.add("new-record");
    const date = record.documentedAt
      ? new Intl.DateTimeFormat("ar-SA", {
          timeZone: "Asia/Riyadh",
          dateStyle: "medium",
          timeStyle: "short",
        }).format(new Date(record.documentedAt))
      : "-";
    const heading = document.createElement("div");
    heading.className = "admin-record-heading";
    const title = document.createElement("div");
    const name = document.createElement("strong");
    name.textContent = record.establishmentName || "منشأة غير محددة";
    const meta = document.createElement("small");
    meta.textContent = `${record.researcher || "-"} · ${record.city || "-"}`;
    title.append(name, meta);
    const time = document.createElement("time");
    const updatedDate = record.updatedAt
      ? new Intl.DateTimeFormat("ar-SA", {
          timeZone: "Asia/Riyadh",
          dateStyle: "medium",
          timeStyle: "short",
        }).format(new Date(record.updatedAt))
      : "";
    time.textContent = updatedDate ? `آخر تعديل: ${updatedDate}` : date;
    heading.append(title, time);
    const badges = document.createElement("div");
    badges.className = "admin-record-badges";
    const documentedBadge = document.createElement("span");
    documentedBadge.className = "admin-badge-documented";
    documentedBadge.textContent = record.documentedDate === riyadhToday() ? "موثق اليوم" : "موثق";
    const statusBadge = document.createElement("span");
    statusBadge.textContent = record.fieldStatus || "غير محدد";
    const photoBadge = document.createElement("span");
    photoBadge.textContent = record.photoCount ? `${record.photoCount} صور` : "بدون صور";
    badges.append(documentedBadge, statusBadge, photoBadge);
    const documentedTime = Date.parse(record.documentedAt || "") || 0;
    const updatedTime = Date.parse(record.updatedAt || "") || 0;
    if (updatedTime && documentedTime && updatedTime - documentedTime > 60000) {
      const editedBadge = document.createElement("span");
      editedBadge.className = "admin-badge-edited";
      editedBadge.textContent = "تم التعديل";
      badges.append(editedBadge);
    }
    const details = document.createElement("div");
    details.className = "admin-record-details";
    details.append(
      detailItem("السجل التجاري", record.commercialRecord || "-"),
      detailItem("الحالة الميدانية", record.fieldStatus || "-"),
      detailItem("عدد الصور", record.photoCount || 0),
    );
    if (record.statement) details.append(detailItem("الإفادة", record.statement, "wide"));
    const actions = document.createElement("div");
    actions.className = "admin-record-actions";
    if (record.folderUrl) {
      const folder = document.createElement("a");
      folder.href = record.folderUrl;
      folder.target = "_blank";
      folder.rel = "noopener";
      folder.textContent = "فتح المجلد";
      actions.append(folder);
    }
    (record.photoUrls || []).slice(0, 3).forEach((url, index) => {
      const photo = document.createElement("a");
      photo.href = url;
      photo.target = "_blank";
      photo.rel = "noopener";
      photo.textContent = `الصورة ${index + 1}`;
      actions.append(photo);
    });
    item.append(heading, badges, details, actions);
    fragment.append(item);
  });
  elements.adminRecords.replaceChildren(fragment);
}

async function loadAdminDashboard({ automatic = false } = {}) {
  if (adminRefreshInProgress || sessionAccessCode !== "1448") return;
  adminRefreshInProgress = true;
  elements.refreshAdminButton.disabled = true;
  setAdminSyncState("syncing", automatic ? "جارٍ التحديث التلقائي..." : "جارٍ تحديث البيانات...");
  try {
    const result = await fetchDocumentation("admin", sessionAccessCode);
    const incomingRecords = hydrateRecordKeys(result.records || []);
    preserveDocumentedRows(incomingRecords);
    if (adminDashboardInitialized) {
      const previousIds = new Set(adminRecords.map(adminRecordIdentity));
      newAdminRecordIds = new Set(
        incomingRecords
          .map(adminRecordIdentity)
          .filter((identity) => identity && !previousIds.has(identity)),
      );
    } else {
      newAdminRecordIds.clear();
    }
    adminRecords = incomingRecords;
    documentationRecords = adminRecords;
    setAdminFilterOptions();
    elements.adminUpdatedAt.textContent = `آخر مزامنة: ${new Intl.DateTimeFormat("ar-SA", {
      timeZone: "Asia/Riyadh",
      dateStyle: "medium",
      timeStyle: "short",
    }).format(new Date(result.generatedAt))}`;
    renderAdminStats();
    renderAdminOverview();
    renderProductivity();
    renderAdminRecords();
    adminDashboardInitialized = true;
    setAdminSyncState("connected", newAdminRecordIds.size
      ? `${newAdminRecordIds.size} توثيق جديد`
      : "محدّث تلقائيًا");
    if (newAdminRecordIds.size) {
      showToast(`وصل ${newAdminRecordIds.size} توثيق جديد وتم تحديث لوحة المشرف`);
      setTimeout(() => {
        newAdminRecordIds.clear();
        elements.adminRecords.querySelectorAll(".new-record").forEach((item) => item.classList.remove("new-record"));
      }, 6000);
    }
  } catch (error) {
    console.warn(error.message);
    setAdminSyncState("offline", "تعذر التحديث، ستتم إعادة المحاولة");
  } finally {
    elements.refreshAdminButton.disabled = false;
    adminRefreshInProgress = false;
  }
}

function stopAdminAutoRefresh() {
  clearInterval(adminRefreshTimer);
  adminRefreshTimer = null;
}

function startAdminAutoRefresh() {
  stopAdminAutoRefresh();
  if (sessionAccessCode !== "1448" || document.hidden) return;
  adminRefreshTimer = setInterval(
    () => loadAdminDashboard({ automatic: true }),
    ADMIN_REFRESH_INTERVAL,
  );
}

async function copyText(text, successMessage) {
  try {
    await navigator.clipboard.writeText(text);
  } catch {
    const area = document.createElement("textarea");
    area.value = text;
    area.style.cssText = "position:fixed;opacity:0";
    document.body.append(area);
    area.select();
    document.execCommand("copy");
    area.remove();
  }
  showToast(successMessage);
}

function localPhone(value) {
  const digits = String(value ?? "").replace(/\D/g, "");
  if (digits.startsWith("966")) return `0${digits.slice(3)}`;
  return digits;
}

function internationalPhone(value) {
  const digits = localPhone(value);
  return digits.startsWith("0") ? `966${digits.slice(1)}` : digits;
}

function toEnglishDigits(value) {
  return String(value ?? "")
    .replace(/[٠-٩]/g, (digit) => String("٠١٢٣٤٥٦٧٨٩".indexOf(digit)))
    .replace(/[۰-۹]/g, (digit) => String("۰۱۲۳۴۵۶۷۸۹".indexOf(digit)));
}

function recipientPhone(value) {
  let digits = toEnglishDigits(value).replace(/\D/g, "");
  if (digits.startsWith("00966")) digits = digits.slice(2);
  if (digits.startsWith("966")) digits = digits.slice(3);
  if (digits.startsWith("0")) digits = digits.slice(1);
  return /^5\d{8}$/.test(digits) ? `966${digits}` : "";
}

function locationRank(row) {
  return { madon: 4, base: 3, statement: 2, none: 1 }[row.locationType] || 0;
}

function saveState() {
  if (!activeResearcher) return;
  localStorage.setItem(
    STATE_KEY,
    JSON.stringify({
      researcher: activeResearcher.name,
      city: elements.cityButtons.querySelector(".city-choice.active")?.dataset.city || "",
      search: elements.searchInput.value,
      status: elements.statusSelect.value,
      location: elements.locationSelect.value,
    }),
  );
}

function savedState() {
  try {
    return JSON.parse(localStorage.getItem(STATE_KEY) || "{}");
  } catch {
    return {};
  }
}

function showOnly(view) {
  [elements.loginView, elements.researcherView, elements.dashboardView, elements.adminView].forEach((item) => {
    item.hidden = item !== view;
  });
}

function renderResearchers() {
  const query = normalize(elements.researcherSearch.value);
  const fragment = document.createDocumentFragment();
  payload.researchers
    .filter((researcher) => !query || normalize(researcher.name).includes(query))
    .forEach((researcher) => {
      const button = document.createElement("button");
      button.type = "button";
      button.className = "researcher-choice";
      const content = document.createElement("span");
      const name = document.createElement("strong");
      name.textContent = researcher.name;
      const meta = document.createElement("small");
      meta.textContent = `${researcher.count} عينة`;
      content.append(name, meta);
      const arrow = createIcon("m15 18-6-6 6-6");
      button.append(content, arrow);
      button.addEventListener("click", () => openResearcher(researcher));
      fragment.append(button);
    });
  elements.researcherGrid.replaceChildren(fragment);
}

function setDirectoryMode(mode) {
  directoryMode = mode;
  const entityMode = mode === "entity";
  elements.researcherModeButton.classList.toggle("active", !entityMode);
  elements.entityModeButton.classList.toggle("active", entityMode);
  elements.researcherGrid.hidden = entityMode;
  elements.entitySearchResults.hidden = !entityMode;
  elements.researcherSearch.placeholder = entityMode
    ? "ابحث باسم المنشأة أو السجل التجاري"
    : "ابحث باسم الباحث";
  elements.researcherSearch.value = "";
  if (entityMode) renderEntitySearch();
  else renderResearchers();
}

function renderEntitySearch() {
  const query = normalize(elements.researcherSearch.value);
  if (query.length < 2) {
    elements.entitySearchResults.innerHTML =
      '<div class="directory-empty">اكتب حرفين على الأقل للبحث في جميع المنشآت.</div>';
    return;
  }
  const matches = payload.rows
    .filter((row) =>
      normalize(`${row.establishmentName} ${row.commercialRecord} ${row.unifiedNumber} ${row.researcher}`)
        .includes(query))
    .slice(0, 40);
  if (!matches.length) {
    elements.entitySearchResults.innerHTML =
      '<div class="directory-empty">لا توجد منشأة مطابقة لبحثك.</div>';
    return;
  }
  const fragment = document.createDocumentFragment();
  matches.forEach((row) => {
    const button = document.createElement("button");
    button.type = "button";
    button.className = "entity-result";
    const text = document.createElement("span");
    const name = document.createElement("strong");
    name.textContent = row.establishmentName;
    const meta = document.createElement("small");
    meta.textContent = `${row.researcher} · ${row.city}`;
    text.append(name, meta);
    const record = document.createElement("span");
    record.className = "entity-result-meta";
    record.textContent = row.commercialRecord || "دون سجل";
    button.append(text, record);
    button.addEventListener("click", () => {
      const researcher = payload.researchers.find((item) => item.name === row.researcher);
      openResearcher(researcher, row.sampleKey);
    });
    fragment.append(button);
  });
  elements.entitySearchResults.replaceChildren(fragment);
}

function createStat(value, label, className) {
  const item = document.createElement("div");
  item.className = `stat-item ${className}`;
  const strong = document.createElement("strong");
  strong.textContent = value;
  const span = document.createElement("span");
  span.textContent = label;
  item.append(strong, span);
  return item;
}

function renderSummary() {
  const records = latestRecordsBySample(documentationRecords);
  const commercialRecords = latestRecordsByCommercialRecord(documentationRecords);
  const documented = researcherRows.filter((row) =>
    records.has(row.sampleKey) ||
    Boolean(row.commercialRecord && commercialRecords.has(row.commercialRecord)),
  ).length;
  const total = researcherRows.length;
  const remaining = Math.max(total - documented, 0);
  const percentage = total ? Math.round((documented / total) * 100) : 0;
  const today = new Intl.DateTimeFormat("en-CA", {
    timeZone: "Asia/Riyadh",
    year: "numeric",
    month: "2-digit",
    day: "2-digit",
  }).format(new Date());
  const documentedToday = researcherRows.filter(
    (row) => (records.get(row.sampleKey) || commercialRecords.get(row.commercialRecord))?.documentedDate === today,
  ).length;
  const progress = document.createElement("div");
  progress.className = "researcher-progress";
  progress.innerHTML = `
    <div class="researcher-progress-heading">
      <span>${remaining === 0 && total ? "أحسنت، اكتملت جميع العينات" : motivationalMessage(percentage)}</span>
      <strong>${percentage}%</strong>
    </div>
    <div class="researcher-progress-track" role="progressbar" aria-label="نسبة إنجاز الباحث" aria-valuemin="0" aria-valuemax="100" aria-valuenow="${percentage}">
      <span style="width: ${percentage}%"></span>
    </div>
  `;
  elements.summaryStats.replaceChildren(
    createStat(total, "إجمالي العينات", "total"),
    createStat(documented, "تم التوثيق", "documented"),
    createStat(remaining, "المتبقي", "remaining"),
    createStat(documentedToday, "إنجاز اليوم", "today"),
    progress,
  );
}

function motivationalMessage(percentage) {
  if (percentage >= 90) return "بقي القليل، شكرًا لجهودك";
  if (percentage >= 50) return "تقدم ممتاز، واصل الإنجاز";
  if (percentage > 0) return "بداية موفقة، كل توثيق يصنع فرقًا";
  return "جاهز للبدء، نتمنى لك يومًا موفقًا";
}

function activeCity() {
  return elements.cityButtons.querySelector(".city-choice.active")?.dataset.city || "";
}

function setActiveCity(city) {
  elements.cityButtons.querySelectorAll(".city-choice").forEach((button) => {
    const active = button.dataset.city === city;
    button.classList.toggle("active", active);
    button.setAttribute("aria-checked", String(active));
  });
  updateRepresentativeHighlight(city);
  applyFilters();
}

function renderCities(preferredCity = "") {
  const counts = new Map();
  researcherRows.forEach((row) => counts.set(row.city, (counts.get(row.city) || 0) + 1));
  const cities = uniqueSorted([...counts.keys()]);
  const allButton = document.createElement("button");
  allButton.type = "button";
  allButton.className = "city-choice";
  allButton.dataset.city = "";
  allButton.innerHTML = `<span>جميع المدن</span><strong>${researcherRows.length}</strong>`;
  allButton.addEventListener("click", () => setActiveCity(""));
  const buttons = [allButton];
  cities.forEach((city) => {
    const button = document.createElement("button");
    button.type = "button";
    button.className = "city-choice";
    button.dataset.city = city;
    const label = document.createElement("span");
    label.textContent = city;
    const count = document.createElement("strong");
    count.textContent = counts.get(city);
    button.append(label, count);
    button.addEventListener("click", () => setActiveCity(city));
    buttons.push(button);
  });
  elements.cityButtons.replaceChildren(...buttons);
  const initialCity = cities.includes(preferredCity) ? preferredCity : "";
  setActiveCity(initialCity);
}

function findRepresentative(city) {
  const normalizedCity = normalize(city);
  if (!normalizedCity) return null;
  return REPRESENTATIVES.find((item) => item.match.some((term) => normalizedCity.includes(normalize(term))));
}

function actionButton(label, icon, onClick) {
  const button = document.createElement("button");
  button.type = "button";
  button.className = "mini-action";
  button.append(createIcon(icon), document.createTextNode(label));
  button.addEventListener("click", onClick);
  return button;
}

function actionLink(label, href, icon) {
  const link = document.createElement("a");
  link.className = "mini-action";
  link.href = href;
  link.target = "_blank";
  link.rel = "noopener";
  link.append(createIcon(icon), document.createTextNode(label));
  return link;
}

function representativeMessage(representative, row = null) {
  const lines = [
    "السلام عليكم ورحمة الله وبركاته،",
    "",
    `الأستاذ/ ${representative.name} المحترم،`,
    "",
    "نأمل التكرم بإفادتنا عن المنشأة الموضحة أدناه، وتزويدنا بموقعها عند توفره، وذلك لاستكمال بيانات الزيارة الميدانية.",
  ];
  if (row) {
    lines.push(
      "",
      "*بيانات المنشأة:*",
      `• المنشأة: ${row.establishmentName || "-"}`,
      `• السجل التجاري: ${row.commercialRecord || "-"}`,
      `• رقم العقد: ${row.contractNumber || "لا يوجد رقم عقد"}`,
      `• المدينة الصناعية: ${row.city || "-"}`,
      `• حالة العينة: ${row.status || "-"}`,
    );
    if (row.madonStatement) lines.push(`• إفادة مدن المسجلة: ${row.madonStatement}`);
  }
  lines.push("", "شاكرين لكم تعاونكم وتجاوبكم.");
  return lines.join("\n");
}

function bulkRepresentativeMessage(representative, rows) {
  const lines = [
    "السلام عليكم ورحمة الله وبركاته،",
    "",
    `الأستاذ/ ${representative.name} المحترم،`,
    "",
    `نأمل التكرم بإفادتنا عن المنشآت التالية وعددها (${rows.length})، وتزويدنا بمواقعها عند توفرها، وذلك لاستكمال بيانات الزيارات الميدانية.`,
  ];
  rows.forEach((row, index) => {
    lines.push(
      "",
      `*${index + 1}. ${row.establishmentName || "منشأة دون اسم"}*`,
      `• السجل التجاري: ${row.commercialRecord || "-"}`,
      `• رقم العقد: ${row.contractNumber || "لا يوجد رقم عقد"}`,
      `• المدينة الصناعية: ${row.city || "-"}`,
      `• حالة العينة: ${row.status || "-"}`,
    );
    if (row.madonStatement) lines.push(`• إفادة مدن المسجلة: ${row.madonStatement}`);
    if (row.madonNoteText) lines.push(`• ملاحظات مدن: ${row.madonNoteText}`);
  });
  lines.push("", "شاكرين لكم تعاونكم وتجاوبكم.");
  return lines.join("\n");
}

function renderRepresentativesDirectory() {
  const fragment = document.createDocumentFragment();
  REPRESENTATIVES.forEach((representative) => {
    const card = document.createElement("article");
    card.className = "representative-card";
    card.dataset.city = representative.city;

    const header = document.createElement("div");
    header.className = "representative-card-header";
    const icon = document.createElement("span");
    icon.className = "representative-icon";
    icon.append(createIcon("M16 21v-2a4 4 0 0 0-4-4H6a4 4 0 0 0-4 4v2M9 11a4 4 0 1 0 0-8M19 8v6M22 11h-6"));
    const text = document.createElement("div");
    const city = document.createElement("small");
    city.textContent = representative.role || representative.city;
    const name = document.createElement("strong");
    name.textContent = representative.name;
    const phone = document.createElement("span");
    phone.textContent = representative.phone;
    text.append(city, name, phone);
    header.append(icon, text);

    const actions = document.createElement("div");
    actions.className = "representative-card-actions";
    actions.append(
      actionButton("نسخ الرقم", ICONS.copy, () => copyText(representative.phone, "تم نسخ رقم الممثل")),
      actionLink(
        "واتساب",
        `https://wa.me/${internationalPhone(representative.phone)}?text=${encodeURIComponent(representativeMessage(representative))}`,
        ICONS.whatsapp,
      ),
    );
    card.append(header, actions);
    fragment.append(card);
  });
  elements.representativesDirectory.replaceChildren(fragment);
}

function setContactsExpanded(expanded) {
  elements.representativesDirectory.classList.toggle("collapsed", !expanded);
  elements.toggleContactsButton.setAttribute("aria-expanded", String(expanded));
  elements.toggleContactsButton.querySelector("span").textContent = expanded ? "إخفاء الأرقام" : "عرض أرقام الممثلين";
}

function updateRepresentativeHighlight(city) {
  const cityRow = researcherRows.find((row) => row.city === city);
  const representative = findRepresentative(cityRow?.representativeCity || city);
  elements.representativesDirectory.querySelectorAll(".representative-card").forEach((card) => {
    card.classList.toggle("recommended", Boolean(representative && card.dataset.city === representative.city));
  });
}

function setSelectOptions(select, values, placeholder) {
  select.replaceChildren(new Option(placeholder, ""));
  values.forEach((value) => select.add(new Option(value, value)));
}

function openResearcher(researcher, focusSampleKey = "") {
  clearSelection();
  activeResearcher = researcher;
  researcherRows = payload.rows
    .filter((row) => row.researcher === researcher.name)
    .sort((a, b) => locationRank(b) - locationRank(a))
    .map((row) => ({ ...row, rowId: row.sampleKey }));
  elements.researcherName.textContent = researcher.name;
  elements.researcherMapLink.href = researcher.mapUrl || "#";
  elements.researcherMapLink.hidden = !researcher.mapUrl;
  elements.formLink.href = FORM_URL;
  elements.searchInput.value = "";
  elements.locationSelect.value = "";
  setSelectOptions(elements.statusSelect, uniqueSorted(researcherRows.map((row) => row.status)), "جميع الحالات");
  renderSummary();
  renderRepresentativesDirectory();
  setContactsExpanded(!mobileQuery.matches);
  const state = savedState();
  if (state.researcher === researcher.name) {
    elements.searchInput.value = state.search || "";
    elements.statusSelect.value = state.status || "";
    elements.locationSelect.value = state.location || "";
  }
  renderCities(state.researcher === researcher.name ? state.city : "");
  showOnly(elements.dashboardView);
  window.scrollTo({ top: 0 });
  saveState();
  if (focusSampleKey) {
    elements.searchInput.value =
      researcherRows.find((row) => row.sampleKey === focusSampleKey)?.establishmentName || "";
    applyFilters();
  }
}

function detailItem(label, value, extraClass = "") {
  const item = document.createElement("div");
  item.className = `detail-item ${extraClass}`.trim();
  const name = document.createElement("span");
  name.className = "detail-label";
  name.textContent = label;
  const content = document.createElement("span");
  content.className = "detail-value";
  content.textContent = String(value);
  item.append(name, content);
  return item;
}

function createLocationBlock(row) {
  if (!row.coordinates) return null;
  const block = document.createElement("div");
  block.className = `location-block location-${row.locationType}`;

  if (row.coordinates) {
    const heading = document.createElement("div");
    heading.className = "location-heading";
    const label = document.createElement("span");
    label.textContent = row.locationType === "madon" ? "إحداثية مدن" : "الإحداثية الأساسية";
    const source = document.createElement("small");
    source.textContent = row.locationType === "madon" ? "الموقع المحدّث" : "حسب بيانات X وY";
    heading.append(label, source);
    block.append(heading);
    block.append(
      actionLink(
        "فتح الموقع في خرائط Google",
        `https://www.google.com/maps?q=${encodeURIComponent(row.coordinates)}`,
        ICONS.map,
      ),
    );
  }

  return block;
}

function createMadonInfo(row) {
  if (!row.madonStatement && !row.madonNoteText) return null;
  const section = document.createElement("div");
  section.className = "madon-info";

  if (row.madonStatement) {
    const statement = document.createElement("div");
    statement.className = "madon-info-item madon-report";
    const title = document.createElement("span");
    title.textContent = "إفادة مدن";
    const text = document.createElement("p");
    text.textContent = row.madonStatement;
    statement.append(title, text);
    section.append(statement);
  }

  if (row.madonNoteText) {
    const note = document.createElement("div");
    note.className = "madon-info-item madon-note";
    const title = document.createElement("span");
    title.textContent = "ملاحظات مدن";
    const text = document.createElement("p");
    text.textContent = row.madonNoteText;
    note.append(title, text);
    section.append(note);
  }
  return section;
}

function formMessage(row = null) {
  const lines = [
    "السلام عليكم ورحمة الله وبركاته،",
    "",
    row ? "السادة/ إدارة المنشأة المحترمين،" : "السادة الكرام،",
    "نأمل التكرم باستكمال استمارة المسح عبر الرابط المرفق، وذلك لاستكمال بيانات الزيارة الميدانية.",
  ];
  if (row) {
    lines.push(
      "",
      "*بيانات المنشأة:*",
      `• المنشأة: ${row.establishmentName || "-"}`,
      `• السجل التجاري: ${row.commercialRecord || "-"}`,
      `• رقم العقد: ${row.contractNumber || "لا يوجد رقم عقد"}`,
      `• المدينة الصناعية: ${row.city || "-"}`,
    );
  }
  lines.push(
    "",
    "*رابط الاستمارة:*",
    FORM_URL,
    "",
    "نأمل إشعارنا بعد استكمال الاستمارة.",
    "",
    "شاكرين لكم حسن تعاونكم وتجاوبكم.",
  );
  return lines.join("\n");
}

function openShareDialog(row = null) {
  shareRow = row;
  elements.recipientPhone.value = localStorage.getItem("ics2LastRecipientPhone") || "";
  elements.recipientPhoneError.textContent = "";
  elements.messagePreview.value = formMessage(row);
  updateShareButton();
  elements.shareDialog.hidden = false;
  document.body.classList.add("dialog-open");
  requestAnimationFrame(() => elements.recipientPhone.focus());
}

function updateShareButton() {
  elements.sendShareButton.disabled = !recipientPhone(elements.recipientPhone.value);
}

function closeShareDialog() {
  elements.shareDialog.hidden = true;
  document.body.classList.remove("dialog-open");
  shareRow = null;
}

function renderMadonOptions(recommended) {
  const fragment = document.createDocumentFragment();
  REPRESENTATIVES.forEach((representative, index) => {
    const label = document.createElement("label");
    label.className = "representative-option";
    const input = document.createElement("input");
    input.type = "radio";
    input.name = "madonRepresentative";
    input.value = String(index);
    input.checked = representative === recommended;
    const content = document.createElement("span");
    const name = document.createElement("strong");
    name.textContent = representative.name;
    const meta = document.createElement("small");
    meta.textContent = `${representative.role || representative.city} • ${representative.phone}`;
    content.append(name, meta);
    const check = createIcon("m5 12 4 4L19 6");
    label.append(input, content, check);
    input.addEventListener("change", () => {
      selectedRepresentative = representative;
      elements.madonMessagePreview.value = isBulkMadonMessage
        ? bulkRepresentativeMessage(representative, selectedRowItems())
        : representativeMessage(representative, madonRow);
    });
    fragment.append(label);
  });
  elements.madonRepresentativeOptions.replaceChildren(fragment);
}

function openMadonDialog(row) {
  isBulkMadonMessage = false;
  madonRow = row;
  selectedRepresentative =
    findRepresentative(row.representativeCity || row.city) || REPRESENTATIVES[0];
  renderMadonOptions(selectedRepresentative);
  elements.madonMessagePreview.value = representativeMessage(selectedRepresentative, row);
  elements.madonDialog.hidden = false;
  document.body.classList.add("dialog-open");
}

function selectedRowItems() {
  return researcherRows.filter((row) => selectedRows.has(row.rowId));
}

function recommendedRepresentativeForRows(rows) {
  const representatives = rows
    .map((row) => findRepresentative(row.representativeCity || row.city))
    .filter(Boolean);
  if (!representatives.length) return REPRESENTATIVES[0];
  const counts = new Map();
  representatives.forEach((item) => counts.set(item, (counts.get(item) || 0) + 1));
  return [...counts.entries()].sort((a, b) => b[1] - a[1])[0][0];
}

function openBulkMadonDialog() {
  const rows = selectedRowItems();
  if (!rows.length) return;
  isBulkMadonMessage = true;
  madonRow = null;
  selectedRepresentative = recommendedRepresentativeForRows(rows);
  renderMadonOptions(selectedRepresentative);
  elements.madonMessagePreview.value = bulkRepresentativeMessage(selectedRepresentative, rows);
  elements.madonDialog.hidden = false;
  document.body.classList.add("dialog-open");
}

function closeMadonDialog() {
  elements.madonDialog.hidden = true;
  document.body.classList.remove("dialog-open");
  madonRow = null;
  selectedRepresentative = null;
  isBulkMadonMessage = false;
}

function renderPhotoPreviews() {
  const fragment = document.createDocumentFragment();
  documentationExistingPhotos.forEach((photo, index) => {
    const item = document.createElement("div");
    item.className = "photo-preview existing-photo";
    const link = document.createElement("a");
    link.href = photo.url;
    link.target = "_blank";
    link.rel = "noopener";
    link.append(
      createIcon(ICONS.map),
      document.createTextNode(`صورة محفوظة ${index + 1}`),
    );
    const remove = document.createElement("button");
    remove.type = "button";
    remove.setAttribute("aria-label", `حذف الصورة المحفوظة ${index + 1}`);
    remove.title = "حذف الصورة من التوثيق";
    remove.append(createIcon("M18 6 6 18M6 6l12 12"));
    remove.addEventListener("click", () => {
      documentationExistingPhotos.splice(index, 1);
      renderPhotoPreviews();
    });
    item.append(link, remove);
    fragment.append(item);
  });
  documentationFiles.forEach((file, index) => {
    const item = document.createElement("div");
    item.className = "photo-preview";
    const image = document.createElement("img");
    image.src = URL.createObjectURL(file);
    image.alt = `الصورة ${index + 1}`;
    image.addEventListener("load", () => URL.revokeObjectURL(image.src), { once: true });
    const remove = document.createElement("button");
    remove.type = "button";
    remove.setAttribute("aria-label", `حذف الصورة ${index + 1}`);
    remove.title = "حذف الصورة";
    remove.append(createIcon("M18 6 6 18M6 6l12 12"));
    remove.addEventListener("click", () => {
      documentationFiles.splice(index, 1);
      renderPhotoPreviews();
    });
    item.append(image, remove);
    fragment.append(item);
  });
  elements.photoPreviews.replaceChildren(fragment);
}

function openDocumentationDialog(row) {
  documentationRow = row;
  documentationFiles = [];
  const record = documentationRecord(row);
  documentationExistingPhotos = (record?.photoUrls || []).map((url) => ({ url }));
  elements.documentationEntity.replaceChildren(
    detailItem("المنشأة", row.establishmentName || "-", "wide"),
    detailItem("السجل التجاري", row.commercialRecord || "-", "ltr-value"),
    detailItem("رقم العقد", row.contractNumber || "لا يوجد رقم عقد", "ltr-value"),
  );
  const storedStatus = record?.fieldStatus || "";
  const statusOptions = [...elements.fieldStatus.options].map((option) => option.value);
  const knownStatus = statusOptions.includes(storedStatus);
  const customStatus = storedStatus.startsWith("أخرى:")
    ? storedStatus.replace(/^أخرى:\s*/, "")
    : storedStatus && !knownStatus
      ? storedStatus
      : "";
  const otherMode = storedStatus === "أخرى" || Boolean(customStatus);
  elements.fieldStatus.value = otherMode ? "أخرى" : knownStatus ? storedStatus : "";
  elements.otherStatus.value = "";
  if (customStatus) elements.otherStatus.value = customStatus;
  elements.otherStatusField.hidden = !otherMode;
  elements.otherStatus.required = otherMode;
  elements.fieldStatement.value = record?.statement || "";
  elements.statementCount.textContent = String(elements.fieldStatement.value.length);
  elements.documentationPhotos.value = "";
  elements.documentationError.textContent = "";
  elements.uploadProgress.hidden = true;
  elements.uploadProgressBar.style.width = "0";
  elements.documentationUnavailable.hidden = documentationReady();
  elements.saveDocumentationButton.disabled = !documentationReady();
  elements.documentationDialogTitle.textContent = record ? "تعديل التوثيق الميداني" : "إضافة إفادة ميدانية";
  renderPhotoPreviews();
  elements.documentationDialog.hidden = false;
  document.body.classList.add("dialog-open");
}

function closeDocumentationDialog() {
  elements.documentationDialog.hidden = true;
  document.body.classList.remove("dialog-open");
  documentationRow = null;
  documentationFiles = [];
  documentationExistingPhotos = [];
}

async function compressImage(file) {
  let source;
  let widthSource;
  let heightSource;
  if ("createImageBitmap" in window) {
    source = await createImageBitmap(file);
    widthSource = source.width;
    heightSource = source.height;
  } else {
    source = await new Promise((resolve, reject) => {
      const image = new Image();
      const url = URL.createObjectURL(file);
      image.onload = () => {
        URL.revokeObjectURL(url);
        resolve(image);
      };
      image.onerror = () => {
        URL.revokeObjectURL(url);
        reject(new Error("تعذر فتح إحدى الصور."));
      };
      image.src = url;
    });
    widthSource = source.naturalWidth;
    heightSource = source.naturalHeight;
  }
  const maxDimension = DOCUMENTATION_CONFIG.maxImageDimension || 1600;
  const scale = Math.min(1, maxDimension / Math.max(widthSource, heightSource));
  const width = Math.max(1, Math.round(widthSource * scale));
  const height = Math.max(1, Math.round(heightSource * scale));
  const canvas = document.createElement("canvas");
  canvas.width = width;
  canvas.height = height;
  canvas.getContext("2d", { alpha: false }).drawImage(source, 0, 0, width, height);
  if (typeof source.close === "function") source.close();
  const blob = await new Promise((resolve) =>
    canvas.toBlob(resolve, "image/jpeg", DOCUMENTATION_CONFIG.jpegQuality || 0.78),
  );
  if (!blob) throw new Error("تعذر تجهيز إحدى الصور.");
  return blob;
}

function blobToBase64(blob) {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = () => resolve(String(reader.result).split(",")[1] || "");
    reader.onerror = () => reject(new Error("تعذر قراءة الصورة."));
    reader.readAsDataURL(blob);
  });
}

async function buildDocumentationPhotos() {
  const output = [];
  for (let index = 0; index < documentationFiles.length; index += 1) {
    elements.uploadProgressBar.style.width = `${15 + Math.round((index / documentationFiles.length) * 45)}%`;
    const compressed = await compressImage(documentationFiles[index]);
    output.push({
      mimeType: "image/jpeg",
      base64: await blobToBase64(compressed),
    });
  }
  return output;
}

function updateSelectionBar() {
  const count = selectedRows.size;
  elements.selectionBar.hidden = count === 0;
  elements.selectionCount.textContent = `${count} ${count === 1 ? "منشأة محددة" : "منشآت محددة"}`;
  document.body.classList.toggle("has-selection", count > 0);
  elements.samplesGrid.querySelectorAll(".sample-card").forEach((card) => {
    const selected = selectedRows.has(card.dataset.rowId);
    card.classList.toggle("selected", selected);
    const input = card.querySelector(".sample-selector input");
    if (input) input.checked = selected;
  });
}

function clearSelection() {
  selectedRows.clear();
  updateSelectionBar();
}

function completedDocumentationMap() {
  try {
    return JSON.parse(localStorage.getItem(DOCUMENTATION_DONE_KEY) || "{}");
  } catch {
    return {};
  }
}

function isDocumentationCompleted(rowId) {
  const row = researcherRows.find((item) => item.rowId === rowId || item.sampleKey === rowId);
  return Boolean(
    latestRecordsBySample(documentationRecords).has(rowId) ||
    (row?.commercialRecord && latestRecordsByCommercialRecord(documentationRecords).has(row.commercialRecord)) ||
    completedDocumentationMap()[rowId],
  );
}

function documentedRowsFirst(rows) {
  const records = latestRecordsBySample(documentationRecords);
  const commercialRecords = latestRecordsByCommercialRecord(documentationRecords);
  const locallyCompleted = completedDocumentationMap();

  return [...rows].sort((a, b) => {
    const aRecord = records.get(a.sampleKey) || commercialRecords.get(a.commercialRecord);
    const bRecord = records.get(b.sampleKey) || commercialRecords.get(b.commercialRecord);
    const aCompleted = Boolean(aRecord || locallyCompleted[a.rowId]);
    const bCompleted = Boolean(bRecord || locallyCompleted[b.rowId]);

    if (aCompleted !== bCompleted) return bCompleted - aCompleted;
    if (!aCompleted) return 0;

    const aTime = Date.parse(aRecord?.documentedAt || "") || 0;
    const bTime = Date.parse(bRecord?.documentedAt || "") || 0;
    return bTime - aTime;
  });
}

function markDocumentationCompleted(rowId, record = {}) {
  if (!rowId) return;

  const completed = completedDocumentationMap();
  completed[rowId] = true;
  localStorage.setItem(DOCUMENTATION_DONE_KEY, JSON.stringify(completed));
  documentationRecords = [
    {
      sampleKey: rowId,
      documentedAt: record.documentedAt || new Date().toISOString(),
      documentedDate: record.documentedDate || new Intl.DateTimeFormat("en-CA", {
        timeZone: "Asia/Riyadh",
        year: "numeric",
        month: "2-digit",
        day: "2-digit",
      }).format(new Date()),
      ...record,
    },
    ...documentationRecords.filter((item) => item.sampleKey !== rowId),
  ];

  const card = elements.samplesGrid.querySelector(`[data-row-id="${rowId}"]`);
  if (card) card.classList.add("completed");
  renderSummary();
}

function createCard(row, index) {
  const card = document.createElement("article");
  card.className = "sample-card";
  card.dataset.rowId = row.rowId;
  if (row.rowId === lastSavedRowId) card.classList.add("recently-documented");
  if (isDocumentationCompleted(row.rowId)) {
    card.classList.add("completed");
    const record = documentationRecord(row);
    if (record?.documentedAt) {
      card.dataset.documentedAt = new Intl.DateTimeFormat("ar-SA", {
        timeZone: "Asia/Riyadh",
        dateStyle: "medium",
      }).format(new Date(record.documentedAt));
    }
  }
  const header = document.createElement("div");
  header.className = "card-header";
  const titleWrap = document.createElement("div");
  const selector = document.createElement("label");
  selector.className = "sample-selector";
  const selectorInput = document.createElement("input");
  selectorInput.type = "checkbox";
  selectorInput.checked = selectedRows.has(row.rowId);
  const selectorMark = document.createElement("span");
  selectorMark.append(createIcon("m5 12 4 4L19 6"));
  const selectorText = document.createElement("span");
  selectorText.textContent = "تحديد";
  selector.append(selectorInput, selectorMark, selectorText);
  selectorInput.addEventListener("change", () => {
    if (selectorInput.checked) selectedRows.add(row.rowId);
    else selectedRows.delete(row.rowId);
    updateSelectionBar();
  });
  const indexLabel = document.createElement("span");
  indexLabel.className = "sample-index";
  indexLabel.textContent = `عينة ${index + 1}`;
  const title = document.createElement("h3");
  title.textContent = row.establishmentName || "منشأة دون اسم";
  titleWrap.append(selector, indexLabel, title);
  const badges = document.createElement("div");
  badges.className = "card-badges";
  if (isDocumentationCompleted(row.rowId)) {
    const documentedBadge = document.createElement("span");
    documentedBadge.className = "documented-badge";
    documentedBadge.textContent = "تم التوثيق بنجاح";
    badges.append(documentedBadge);
  }
  const badge = document.createElement("span");
  badge.className = `status-badge status-${normalize(row.status).includes("مغلق") ? "closed" : "default"}`;
  badge.textContent = row.status || "غير محدد";
  const locationBadge = document.createElement("span");
  locationBadge.className = `location-badge location-badge-${row.locationType}`;
  locationBadge.textContent = {
    madon: "موقع مدن",
    base: "موقع أساسي",
    statement: "إفادة مدن",
    none: "دون موقع",
  }[row.locationType] || "دون موقع";
  badges.append(badge, locationBadge);
  header.append(titleWrap, badges);

  const details = document.createElement("div");
  details.className = "card-details";
  [
    ["السجل التجاري", row.commercialRecord, "ltr-value"],
    ["رقم العقد", row.contractNumber || "لا يوجد رقم عقد", "ltr-value"],
    ["الرقم الموحد", row.unifiedNumber, "ltr-value"],
    ["المدينة الصناعية", row.city, "wide"],
    ["النشاط", row.activity, "wide"],
  ].forEach(([label, value, className]) => {
    if (String(value ?? "").trim()) details.append(detailItem(label, value, className));
  });
  const location = createLocationBlock(row);
  if (location) details.append(location);
  const madonInfo = createMadonInfo(row);
  if (madonInfo) details.append(madonInfo);

  const footer = document.createElement("div");
  footer.className = "card-actions";
  const documented = isDocumentationCompleted(row.rowId);
  footer.append(
    actionButton("رسالة لمسؤول مدن", ICONS.whatsapp, () => openMadonDialog(row)),
    actionButton("مشاركة الاستمارة", ICONS.whatsapp, () => openShareDialog(row)),
    actionButton(
      documented ? "تعديل التوثيق" : "توثيق ميداني",
      documented ? "M4 20h4l11-11-4-4L4 16v4Z M13.5 6.5l4 4" : "M5 3h14v18H5z M8 7h8M8 11h8M8 15h5",
      () => openDocumentationDialog(row),
    ),
  );
  card.append(header, details, footer);
  return card;
}

function renderRows(reset = false) {
  if (reset) {
    renderedCount = 0;
    elements.samplesGrid.replaceChildren();
  }
  const fragment = document.createDocumentFragment();
  visibleRows.slice(renderedCount, renderedCount + PAGE_SIZE).forEach((row, offset) => {
    fragment.append(createCard(row, renderedCount + offset));
  });
  elements.samplesGrid.append(fragment);
  updateSelectionBar();
  renderedCount += Math.min(PAGE_SIZE, visibleRows.length - renderedCount);
  const remaining = visibleRows.length - renderedCount;
  elements.loadMoreWrap.hidden = remaining <= 0;
  elements.loadMoreMeta.textContent = remaining > 0 ? `متبقي ${remaining} عينة` : "";
}

function applyFilters() {
  if (!activeResearcher) return;
  const city = activeCity();
  const query = normalize(elements.searchInput.value);
  const status = elements.statusSelect.value;
  const location = elements.locationSelect.value;
  visibleRows = documentedRowsFirst(researcherRows.filter((row) => {
    if (city && row.city !== city) return false;
    if (status && row.status !== status) return false;
    if (location === "statement" && !row.madonStatement && !row.madonNoteText) return false;
    if (location && location !== "statement" && row.locationType !== location) return false;
    if (query) {
      const haystack = normalize(
        [row.establishmentName, row.commercialRecord, row.unifiedNumber, row.activity].join(" "),
      );
      if (!haystack.includes(query)) return false;
    }
    return true;
  }));
  elements.resultsTitle.textContent = city || "جميع العينات";
  elements.resultsMeta.textContent = `${visibleRows.length} من أصل ${researcherRows.length} عينة`;
  elements.noResults.hidden = visibleRows.length > 0;
  renderRows(true);
  saveState();
}

function clearFilters() {
  elements.searchInput.value = "";
  elements.statusSelect.value = "";
  elements.locationSelect.value = "";
  setActiveCity("");
}

function shareForm() {
  openShareDialog();
}

elements.loginForm.addEventListener("submit", async (event) => {
  event.preventDefault();
  elements.loginError.textContent = "";
  elements.loginButton.disabled = true;
  elements.loginButton.querySelector("span").textContent = "جارٍ الدخول...";
  try {
    const password = elements.password.value;
    const supervisor = password === "1448";
    payload = await decryptData(
      password,
      supervisor && typeof SUPERVISOR_ENCRYPTED_DATA === "object"
        ? SUPERVISOR_ENCRYPTED_DATA
        : ENCRYPTED_DATA,
    );
    sessionAccessCode = password;
    elements.password.value = "";
    if (supervisor) {
      adminDashboardInitialized = false;
      newAdminRecordIds.clear();
      setAdminFilterOptions();
      showOnly(elements.adminView);
      await loadAdminDashboard();
      startAdminAutoRefresh();
      return;
    }
    await syncResearcherDocumentation();
    elements.researcherSearch.value = "";
    setDirectoryMode("researcher");
    renderResearchers();
    showOnly(elements.researcherView);
  } catch {
    elements.loginError.textContent = "رمز الدخول غير صحيح.";
  } finally {
    elements.loginButton.disabled = false;
    elements.loginButton.querySelector("span").textContent = "دخول";
  }
});

elements.togglePassword.addEventListener("click", () => {
  const visible = elements.password.type === "text";
  elements.password.type = visible ? "password" : "text";
  elements.togglePassword.setAttribute("aria-label", visible ? "إظهار رمز الدخول" : "إخفاء رمز الدخول");
});
elements.researcherSearch.addEventListener("input", () => {
  if (directoryMode === "entity") renderEntitySearch();
  else renderResearchers();
});
elements.researcherModeButton.addEventListener("click", () => setDirectoryMode("researcher"));
elements.entityModeButton.addEventListener("click", () => setDirectoryMode("entity"));
elements.switchResearcherButton.addEventListener("click", () => {
  activeResearcher = null;
  setDirectoryMode("researcher");
  renderResearchers();
  showOnly(elements.researcherView);
  window.scrollTo({ top: 0 });
});
elements.logoutButton.addEventListener("click", () => {
  payload = null;
  activeResearcher = null;
  researcherRows = [];
  visibleRows = [];
  sessionAccessCode = "";
  showOnly(elements.loginView);
  elements.password.focus();
});
elements.adminLogoutButton.addEventListener("click", () => {
  stopAdminAutoRefresh();
  payload = null;
  adminRecords = [];
  documentationRecords = [];
  adminDashboardInitialized = false;
  newAdminRecordIds.clear();
  sessionAccessCode = "";
  showOnly(elements.loginView);
  elements.password.focus();
});
elements.refreshAdminButton.addEventListener("click", () => loadAdminDashboard());
document.addEventListener("visibilitychange", () => {
  if (sessionAccessCode !== "1448") return;
  if (document.hidden) {
    stopAdminAutoRefresh();
    setAdminSyncState("paused", "التحديث متوقف أثناء وجود الصفحة بالخلفية");
    return;
  }
  loadAdminDashboard({ automatic: true });
  startAdminAutoRefresh();
});
[elements.adminSearch, elements.adminResearcherFilter, elements.adminCityFilter, elements.adminDateFilter, elements.adminStatusFilter]
  .forEach((control) => control.addEventListener(control.tagName === "INPUT" ? "input" : "change", renderAdminRecords));
elements.clearAdminFilters.addEventListener("click", () => {
  elements.adminSearch.value = "";
  elements.adminResearcherFilter.value = "";
  elements.adminCityFilter.value = "";
  elements.adminDateFilter.value = "";
  elements.adminStatusFilter.value = "";
  renderAdminRecords();
});
elements.searchInput.addEventListener("input", applyFilters);
elements.statusSelect.addEventListener("change", applyFilters);
elements.locationSelect.addEventListener("change", applyFilters);
elements.clearFiltersButton.addEventListener("click", clearFilters);
elements.loadMoreButton.addEventListener("click", () => renderRows(false));
elements.shareFormButton.addEventListener("click", shareForm);
elements.toggleContactsButton.addEventListener("click", () => {
  setContactsExpanded(elements.toggleContactsButton.getAttribute("aria-expanded") !== "true");
});
elements.closeShareDialog.addEventListener("click", closeShareDialog);
elements.shareDialog.addEventListener("click", (event) => {
  if (event.target === elements.shareDialog) closeShareDialog();
});
elements.recipientPhone.addEventListener("input", () => {
  elements.recipientPhoneError.textContent = "";
  updateShareButton();
});
elements.copyShareMessage.addEventListener("click", () =>
  copyText(elements.messagePreview.value, "تم نسخ رسالة الاستمارة"),
);
elements.shareForm.addEventListener("submit", (event) => {
  event.preventDefault();
  const phone = recipientPhone(elements.recipientPhone.value);
  if (!phone) {
    elements.recipientPhoneError.textContent = "يرجى إدخال رقم جوال سعودي صحيح، مثال: 0501234567.";
    elements.recipientPhone.focus();
    return;
  }
  localStorage.setItem("ics2LastRecipientPhone", localPhone(phone));
  const message = formMessage(shareRow);
  window.open(`https://wa.me/${phone}?text=${encodeURIComponent(message)}`, "_blank", "noopener");
  closeShareDialog();
});
elements.closeMadonDialog.addEventListener("click", closeMadonDialog);
elements.madonDialog.addEventListener("click", (event) => {
  if (event.target === elements.madonDialog) closeMadonDialog();
});
elements.copyMadonMessage.addEventListener("click", () =>
  copyText(elements.madonMessagePreview.value, "تم نسخ رسالة مسؤول مدن"),
);
elements.openMadonGroup.addEventListener("click", async () => {
  await copyText(elements.madonMessagePreview.value, "تم نسخ الرسالة، ألصقها الآن في مجموعة مدن");
  window.open(MADON_GROUP_URL, "_blank", "noopener");
});
elements.madonForm.addEventListener("submit", (event) => {
  event.preventDefault();
  if (!selectedRepresentative) return;
  const message = isBulkMadonMessage
    ? bulkRepresentativeMessage(selectedRepresentative, selectedRowItems())
    : representativeMessage(selectedRepresentative, madonRow);
  window.open(
    `https://wa.me/${internationalPhone(selectedRepresentative.phone)}?text=${encodeURIComponent(message)}`,
    "_blank",
    "noopener",
  );
  closeMadonDialog();
});
elements.closeDocumentationDialog.addEventListener("click", closeDocumentationDialog);
elements.cancelDocumentationButton.addEventListener("click", closeDocumentationDialog);
elements.documentationDialog.addEventListener("click", (event) => {
  if (event.target === elements.documentationDialog) closeDocumentationDialog();
});
elements.fieldStatus.addEventListener("change", () => {
  const isOther = elements.fieldStatus.value === "أخرى";
  elements.otherStatusField.hidden = !isOther;
  elements.otherStatus.required = isOther;
  if (!isOther) elements.otherStatus.value = "";
  elements.documentationError.textContent = "";
  if (isOther) elements.otherStatus.focus();
});
elements.otherStatus.addEventListener("input", () => {
  elements.documentationError.textContent = "";
});
elements.fieldStatement.addEventListener("input", () => {
  elements.statementCount.textContent = String(elements.fieldStatement.value.length);
  elements.documentationError.textContent = "";
});
elements.documentationPhotos.addEventListener("change", () => {
  const incoming = [...elements.documentationPhotos.files].filter((file) => file.type.startsWith("image/"));
  const maxPhotos = DOCUMENTATION_CONFIG.maxPhotos || 3;
  const availableSlots = Math.max(maxPhotos - documentationExistingPhotos.length, 0);
  const combined = [...documentationFiles, ...incoming];
  documentationFiles = combined.slice(0, availableSlots);
  elements.documentationPhotos.value = "";
  elements.documentationError.textContent =
    combined.length > availableSlots ? `الحد الأعلى ${maxPhotos} صور مع الصور المحفوظة.` : "";
  renderPhotoPreviews();
});
elements.documentationForm.addEventListener("submit", async (event) => {
  event.preventDefault();
  elements.documentationError.textContent = "";
  if (!documentationReady()) {
    elements.documentationError.textContent = "خدمة التوثيق غير مفعلة بعد.";
    return;
  }
  if (!elements.fieldStatus.value) {
    elements.documentationError.textContent = "اختر الحالة الميدانية.";
    elements.fieldStatus.focus();
    return;
  }
  const customStatus = elements.otherStatus.value.trim();
  if (elements.fieldStatus.value === "أخرى" && customStatus.length < 3) {
    elements.documentationError.textContent = "اكتب توضيح الحالة الأخرى.";
    elements.otherStatus.focus();
    return;
  }
  if (!elements.fieldStatement.value.trim()) {
    elements.documentationError.textContent = "اكتب الإفادة الميدانية.";
    elements.fieldStatement.focus();
    return;
  }
  elements.saveDocumentationButton.disabled = true;
  elements.saveDocumentationButton.textContent = "جارٍ الحفظ...";
  elements.uploadProgress.hidden = false;
  elements.uploadProgressBar.style.width = "10%";
  try {
    const photos = await buildDocumentationPhotos();
    elements.uploadProgressBar.style.width = "65%";
    const existingRecord = documentationRecord(documentationRow);
    const documentationId = existingRecord?.documentationId || crypto.randomUUID();
    const isEditing = Boolean(existingRecord);
    const response = await fetch(DOCUMENTATION_CONFIG.endpoint, {
      method: "POST",
      headers: { "Content-Type": "text/plain;charset=utf-8" },
      body: JSON.stringify({
        action: isEditing ? "updateEvidence" : "createEvidence",
        accessCode: sessionAccessCode,
        documentationId,
        sampleKey: documentationRow.sampleKey,
        researcher: activeResearcher.name,
        establishmentName: documentationRow.establishmentName,
        commercialRecord: documentationRow.commercialRecord,
        contractNumber: documentationRow.contractNumber,
        city: documentationRow.city,
        fieldStatus: elements.fieldStatus.value === "أخرى" ? `أخرى: ${customStatus}` : elements.fieldStatus.value,
        statement: elements.fieldStatement.value.trim(),
        keptPhotoUrls: documentationExistingPhotos.map((photo) => photo.url),
        photos,
      }),
    });
    elements.uploadProgressBar.style.width = "90%";
    const result = await response.json();
    if (!result.ok) throw new Error(result.error || "تعذر حفظ التوثيق.");
    elements.uploadProgressBar.style.width = "100%";
    markDocumentationCompleted(documentationRow.rowId, result);
    lastSavedRowId = documentationRow.rowId;
    closeDocumentationDialog();
    applyFilters();
    const records = latestRecordsBySample(documentationRecords);
    const commercialRecords = latestRecordsByCommercialRecord(documentationRecords);
    const completedCount = researcherRows.filter((row) =>
      records.has(row.sampleKey) ||
      Boolean(row.commercialRecord && commercialRecords.has(row.commercialRecord)),
    ).length;
    const remainingCount = Math.max(researcherRows.length - completedCount, 0);
    showToast(
      remainingCount === 0
        ? "أحسنت، تم استكمال جميع العينات المسندة إليك"
        : `شكرًا لك، تم ${isEditing ? "تحديث" : "توثيق"} العينة وإضافتها إلى إنجاز اليوم. المتبقي ${remainingCount}`,
    );
    setTimeout(() => {
      lastSavedRowId = "";
      elements.samplesGrid.querySelector(".recently-documented")?.classList.remove("recently-documented");
    }, 4200);
  } catch (error) {
    elements.documentationError.textContent =
      error.message || "تعذر رفع التوثيق. تحقق من الاتصال وحاول مرة أخرى.";
    elements.uploadProgress.hidden = true;
  } finally {
    elements.saveDocumentationButton.disabled = !documentationReady();
    elements.saveDocumentationButton.replaceChildren(
      createIcon("M5 3h12l2 2v16H5V3Z M8 3v6h8V3M8 21v-8h8v8"),
      document.createTextNode("حفظ التوثيق"),
    );
  }
});
elements.clearSelectionButton.addEventListener("click", clearSelection);
elements.sendSelectionButton.addEventListener("click", openBulkMadonDialog);
document.addEventListener("keydown", (event) => {
  if (event.key !== "Escape") return;
  if (!elements.shareDialog.hidden) closeShareDialog();
  if (!elements.madonDialog.hidden) closeMadonDialog();
  if (!elements.documentationDialog.hidden) closeDocumentationDialog();
});