const searchBox   = document.getElementById("searchBox");
const clearSearch = document.getElementById("clearSearch");
const pageSizeEl  = document.getElementById("pageSize");
const themeBtn    = document.getElementById("themeToggle");
const tableBody   = document.getElementById("tableBody");
const pagination  = document.getElementById("pagination");
const counter     = document.getElementById("counter");
const loading     = document.getElementById("loading");


let data = [];
let filtered = [];
let currentPage = 1;
const DEFAULT_PAGE_SIZE = 10;              
let rowsPerPage = DEFAULT_PAGE_SIZE;


if (pageSizeEl) pageSizeEl.value = String(DEFAULT_PAGE_SIZE);


const colors = ["#00bcd4","#4caf50","#f44336","#ff9800","#9c27b0","#e91e63","#009688","#3f51b5","#607d8b","#795548"];


function normalizeArabic(str=""){
  return str
    .replace(/[\u064B-\u0652]/g, "")      
    .replace(/[أإآا]/g,"ا").replace(/ى/g,"ي")
    .replace(/ؤ/g,"و").replace(/ئ/g,"ي").replace(/ة/g,"ه")
    .toLowerCase();
}
function matches(text, q){
  if(!q) return true;
  return normalizeArabic(String(text ?? "")).includes(normalizeArabic(q));
}
function highlight(text, q){
  if(!q) return String(text ?? "");
  const esc = q.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
  return String(text ?? "").replace(new RegExp(esc, 'gi'), m => `<mark class="hl">${m}</mark>`);
}


function renderPagination(){
  const pages = Math.ceil(filtered.length / rowsPerPage);
  pagination.innerHTML = "";
  if (pages <= 1) return;

  const makeBtn = (label, page, opts={})=>{
    const b = document.createElement("button");
    b.textContent = label;
    b.className = "page-btn" + (opts.ghost ? " ghost" : "");
    b.disabled = !!opts.disabled;
    b.addEventListener("click", ()=>{ 
      currentPage = page; 
      updateView(); 
      window.scrollTo({top:0, behavior:"smooth"}); 
    });
    return b;
  };

  pagination.appendChild(makeBtn("‹", Math.max(1, currentPage-1), {ghost:true, disabled: currentPage===1}));

  const windowSize = 5;
  let total = pages;
  let start = Math.max(1, currentPage - Math.floor(windowSize/2));
  let end   = Math.min(total, start + windowSize - 1);
  if (end - start + 1 < windowSize) start = Math.max(1, end - windowSize + 1);

  if (start > 1) pagination.appendChild(makeBtn("1", 1, {ghost: currentPage!==1}));
  if (start > 2) pagination.appendChild(Object.assign(document.createElement("span"), {className:"dots", textContent:"..."}));

  for (let p=start; p<=end; p++){
    const btn = makeBtn(String(p), p);
    if (p === currentPage) btn.classList.add("active");
    pagination.appendChild(btn);
  }

  if (end < total - 1) pagination.appendChild(Object.assign(document.createElement("span"), {className:"dots", textContent:"..."}));
  if (end < total) pagination.appendChild(makeBtn(String(total), total, {ghost: currentPage!==total}));

  pagination.appendChild(makeBtn("›", Math.min(total, currentPage+1), {ghost:true, disabled: currentPage===total}));
}


function renderTable(){
  const q = searchBox.value.trim();
  tableBody.innerHTML = "";

  const start = (currentPage - 1) * rowsPerPage;
  const pageItems = filtered.slice(start, start + rowsPerPage);

  if (pageItems.length === 0) {
    const tr = document.createElement("tr");
    const td = document.createElement("td");
    td.colSpan = 3; td.className = "no-results";
    td.textContent = "🤔 لا توجد نتائج مطابقة";
    tr.appendChild(td); 
    tableBody.appendChild(tr);
    return;
  }

  pageItems.forEach((it, i)=>{
    const tr = document.createElement("tr");
    const code = it.code ?? "";
    const act  = it.activity ?? it.name ?? "";

    const codeTd = document.createElement("td");
    codeTd.innerHTML = highlight(code, q);

    const actTd  = document.createElement("td");
    actTd.innerHTML  = highlight(act, q);

    const colorTd = document.createElement("td");
    const colorBar = document.createElement("div");
    colorBar.className = "color-bar";
    colorBar.style.backgroundColor = colors[i % colors.length];
    colorTd.appendChild(colorBar);

    tr.appendChild(codeTd); tr.appendChild(actTd); tr.appendChild(colorTd);
    tableBody.appendChild(tr);
  });
}

function updateView(){
  const q = searchBox.value.trim();
  filtered = data.filter(it => matches(it.code, q) || matches(it.activity ?? it.name, q));


  if (!q) {
    counter.textContent = `📊 إجمالي التخصصات: ${data.length.toLocaleString()}`;
  } else {
    counter.textContent = filtered.length
      ? `✅ عدد النتائج: ${filtered.length.toLocaleString()}`
      : "🤔 لا توجد نتائج مطابقة";
  }

  if (loading) loading.style.display = "none";
  renderTable();
  renderPagination();
}


function debounce(fn, delay=200){ let t; return (...a)=>{ clearTimeout(t); t=setTimeout(()=>fn(...a), delay); }; }

searchBox.addEventListener("input", debounce(()=>{ currentPage=1; updateView(); }, 180));
clearSearch.addEventListener("click", ()=>{ searchBox.value=""; searchBox.focus(); currentPage=1; updateView(); });
pageSizeEl.addEventListener("change", ()=>{ rowsPerPage = parseInt(pageSizeEl.value, 10); currentPage=1; updateView(); });


document.addEventListener("keydown", (e)=>{ if(e.key==="/"){ e.preventDefault(); searchBox.focus(); } });


(function initTheme(){
  const saved = localStorage.getItem("theme") || "light";
  document.documentElement.classList.toggle("dark", saved === "dark");
  themeBtn.textContent = saved === "dark" ? "☀️ فاتح" : "🌙 ليلي";
  themeBtn.addEventListener("click", ()=>{
    const isDark = document.documentElement.classList.toggle("dark");
    localStorage.setItem("theme", isDark ? "dark" : "light");
    themeBtn.textContent = isDark ? "☀️ فاتح" : "🌙 ليلي";
  });
})();


fetch("data.json", { cache: "no-cache" })
  .then(r=> r.json())
  .then(json=>{
    data = Array.isArray(json) ? json.map(row=>({
      code: row.code ?? row.Code ?? row["رمز"] ?? "",
      activity: row.activity ?? row.Activity ?? row.name ?? row["النشاط"] ?? ""
    })) : [];
    updateView();
  })
  .catch(err=>{
    console.error(err);
    if (loading) loading.textContent = "تعذر تحميل البيانات ❌";
  });
(function(){
  const tw = document.querySelector('.table-wrap');
  if (!tw) return;
  let t;
  tw.addEventListener('scroll', ()=>{
    tw.classList.add('scrolling');
    clearTimeout(t);
    t = setTimeout(()=> tw.classList.remove('scrolling'), 180);
  });
})();