/* FinanceBench viewer — Corpus, Eval, full runs, and prejoined comparison. */
(function () {
  "use strict";

  var $ = function (id) { return document.getElementById(id); };
  var RUN_REGISTRY = {};

  function esc(s) {
    if (s === null || s === undefined) return "";
    return String(s)
      .replace(/&/g, "&")
      .replace(/</g, "&lt;")
      .replace(/>/g, "&gt;")
      .replace(/"/g, "&quot;");
  }

  function shorten(s, n) {
    s = String(s || "").replace(/\s+/g, " ").trim();
    return s.length > n ? s.slice(0, n - 1) + "…" : s;
  }

  function field(label, valueHtml, cls) {
    return '<div class="field' + (cls ? " " + cls : "") + '"><div class="lbl">' +
      esc(label) + '</div><div class="val">' + valueHtml + "</div></div>";
  }

  function formatPairs(value) {
    if (!value || typeof value !== "object") return "—";
    var parts = [];
    Object.keys(value).forEach(function (key) {
      if (value[key] !== null && value[key] !== undefined) {
        parts.push(esc(key) + ": <b>" + esc(value[key]) + "</b>");
      }
    });
    return parts.length ? parts.join(" · ") : "—";
  }

  function statusFor(record) {
    if (!record.answered) return "missing";
    return record.correct === true ? "correct" : "incorrect";
  }

  function statusBadge(record) {
    var status = statusFor(record);
    var label = status === "correct" ? "✓ Correct" :
      (status === "missing" ? "∅ Missing" : "✕ Incorrect");
    return '<span class="badge status-' + status + '">' + label + "</span>";
  }

  var state = {
    mode: "corpus",
    corpus: [],
    corpusView: [],
    corpusIdx: 0,
    corpusTextIndex: {},
    corpusTextCache: {},
    corpusChunkIdx: 0,
    corpusTextSequence: 0,
    questions: [],
    evalView: [],
    evalIdx: 0,
    manifest: null,
    runs: {},
    compare: null,
  };

  /* ---------------- data loading ---------------- */
  function parseJSONL(text) {
    var out = [];
    text.split("\n").forEach(function (line) {
      var trimmed = line.trim();
      if (!trimmed) return;
      try { out.push(JSON.parse(trimmed)); } catch (e) { /* skip bad line */ }
    });
    return out;
  }

  function fetchJSON(path) {
    return fetch(path).then(function (response) {
      if (!response.ok) throw new Error(path + ": HTTP " + response.status);
      return response.json();
    });
  }

  function loadAll() {
    return Promise.all([
      fetchJSON("corpus_index.json"),
      fetch("financebench_open_source.jsonl").then(function (response) {
        if (!response.ok) throw new Error("financebench_open_source.jsonl: HTTP " + response.status);
        return response.text();
      }),
      fetchJSON("corpus_text/index.json"),
      fetchJSON("runs/manifest.json"),
    ]).then(function (results) {
      state.corpus = results[0] || [];
      state.questions = parseJSONL(results[1]);
      (results[2].rows || []).forEach(function (row) {
        state.corpusTextIndex[row.doc_name] = row;
      });
      state.manifest = results[3];
      (state.manifest.runs || []).forEach(function (run) {
        RUN_REGISTRY[run.slot] = run;
        state.runs[run.slot] = {
          meta: run,
          index: null,
          view: [],
          idx: 0,
          cache: {},
        };
      });
    });
  }

  function isRunMode(mode) {
    return Object.prototype.hasOwnProperty.call(RUN_REGISTRY, mode);
  }

  function rememberQid(qid) {
    if (qid) window.TrajectoryUI.setQid(qid);
  }

  function findQidIndex(records) {
    var qid = window.TrajectoryUI.getQid();
    if (!qid) return -1;
    return records.findIndex(function (record) {
      return (record.financebench_id || record.qid) === qid;
    });
  }

  function loadRun(slot) {
    var runState = state.runs[slot];
    if (runState.index) return Promise.resolve(runState);
    $("runCard").innerHTML = '<div class="empty">Loading ' + esc(runState.meta.label) + "…</div>";
    return fetchJSON(runState.meta.index).then(function (index) {
      runState.index = index;
      runState.view = index.records || [];
      return runState;
    });
  }

  function loadCompare() {
    if (state.compare) return Promise.resolve(state.compare);
    $("compareCard").innerHTML = '<div class="empty">Loading comparison…</div>';
    return fetchJSON(state.manifest.compare.index).then(function (index) {
      state.compare = {
        index: index,
        view: index.records || [],
        idx: 0,
        cache: {},
      };
      renderCompareSummaries();
      return state.compare;
    });
  }

  function loadShard(cache, item) {
    if (cache[item.qid]) return Promise.resolve(cache[item.qid]);
    return fetchJSON(item.path).then(function (record) {
      cache[item.qid] = record;
      return record;
    });
  }

  function loadCompressedJSON(path) {
    return fetch(path).then(function (response) {
      if (!response.ok) throw new Error(path + ": HTTP " + response.status);
      return response.text();
    }).then(function (encoded) {
      var binary = atob(encoded.trim());
      var bytes = new Uint8Array(binary.length);
      for (var i = 0; i < binary.length; i++) bytes[i] = binary.charCodeAt(i);
      if (typeof DecompressionStream === "undefined") {
        throw new Error("This browser cannot decompress FinanceBench text shards.");
      }
      var stream = new Blob([bytes]).stream().pipeThrough(new DecompressionStream("gzip"));
      return new Response(stream).text();
    }).then(JSON.parse);
  }

  /* ---------------- corpus tab ---------------- */
  function populateCorpusFilters() {
    var sectors = {}, types = {};
    state.corpus.forEach(function (doc) {
      if (doc.gics_sector) sectors[doc.gics_sector] = true;
      if (doc.doc_type) types[doc.doc_type] = true;
    });
    Object.keys(sectors).sort().forEach(function (sector) {
      var option = document.createElement("option");
      option.value = sector; option.textContent = sector; $("sectorFilter").appendChild(option);
    });
    Object.keys(types).sort().forEach(function (type) {
      var option = document.createElement("option");
      option.value = type; option.textContent = type; $("docTypeFilter").appendChild(option);
    });
  }

  function filterCorpus() {
    var query = $("corpusFilter").value.trim().toLowerCase();
    var sector = $("sectorFilter").value;
    var type = $("docTypeFilter").value;
    state.corpusView = state.corpus.filter(function (doc) {
      if (sector && doc.gics_sector !== sector) return false;
      if (type && doc.doc_type !== type) return false;
      if (query) {
        var haystack = (doc.doc_name + " " + (doc.company || "")).toLowerCase();
        if (haystack.indexOf(query) === -1) return false;
      }
      return true;
    });
    if (state.corpusIdx >= state.corpusView.length) state.corpusIdx = 0;
    rebuildDocSelect();
    renderCorpus();
  }

  function rebuildDocSelect() {
    var select = $("docSelect");
    select.innerHTML = "";
    state.corpusView.forEach(function (doc, index) {
      var option = document.createElement("option");
      option.value = String(index);
      option.textContent = doc.doc_name + (doc.company ? "  ·  " + doc.company : "");
      select.appendChild(option);
    });
    select.value = String(state.corpusIdx);
  }

  function renderCorpus() {
    var meta = $("docMetaCard");
    var textHost = $("docTextContent");
    if (!state.corpusView.length) {
      meta.innerHTML = '<div class="empty">No documents match the filter.</div>';
      textHost.innerHTML = "";
      $("corpusCounter").textContent = "0 / 0";
      return;
    }
    var doc = state.corpusView[state.corpusIdx];
    $("docSelect").value = String(state.corpusIdx);
    $("corpusCounter").textContent = (state.corpusIdx + 1) + " / " + state.corpusView.length;

    var pills = [];
    if (doc.company) pills.push('<span class="meta-pill"><b>' + esc(doc.company) + "</b></span>");
    if (doc.gics_sector) pills.push('<span class="meta-pill">Sector: <b>' + esc(doc.gics_sector) + "</b></span>");
    if (doc.doc_type) pills.push('<span class="meta-pill">Type: <b>' + esc(doc.doc_type) + "</b></span>");
    if (doc.doc_period) pills.push('<span class="meta-pill">Period: <b>' + esc(doc.doc_period) + "</b></span>");
    if (!doc.has_meta) pills.push('<span class="meta-pill">no metadata</span>');
    var link = doc.doc_link
      ? '<a class="doc-link" href="' + esc(doc.doc_link) + '" target="_blank" rel="noopener">Official source ↗</a>'
      : "";
    var bundled = doc.pdf
      ? '<a class="doc-link" href="' + esc(doc.pdf) + '" target="_blank" rel="noopener">Open bundled PDF ↗</a>'
      : "";

    meta.innerHTML = "<h2>" + esc(doc.doc_name) + "</h2>" +
      '<div class="meta-grid">' + pills.join("") + bundled + link + "</div>";
    state.corpusChunkIdx = 0;
    textHost.innerHTML = '<div class="empty">Loading extracted filing text…</div>';
    var indexRow = state.corpusTextIndex[doc.doc_name];
    if (!indexRow) {
      textHost.innerHTML = '<div class="empty">No extracted text shard is available for this filing.</div>';
      return;
    }
    var sequence = ++state.corpusTextSequence;
    var request = state.corpusTextCache[doc.doc_name]
      ? Promise.resolve(state.corpusTextCache[doc.doc_name])
      : loadCompressedJSON("corpus_text/" + indexRow.path).then(function (record) {
        state.corpusTextCache[doc.doc_name] = record;
        return record;
      });
    request.then(function (record) {
      if (sequence !== state.corpusTextSequence) return;
      renderCorpusText(record);
    }).catch(function (error) {
      textHost.innerHTML = '<div class="empty">Failed to load filing text: ' + esc(error) + "</div>";
    });
  }

  function renderCorpusText(record) {
    var chunks = record.chunks || [];
    if (!chunks.length) {
      $("docTextContent").innerHTML = '<div class="empty">This filing has no extracted chunks.</div>';
      return;
    }
    if (state.corpusChunkIdx >= chunks.length) state.corpusChunkIdx = chunks.length - 1;
    var chunk = chunks[state.corpusChunkIdx];
    var options = chunks.map(function (item, index) {
      var label = "Pages " + item.page_start + "–" + item.page_end;
      return '<option value="' + index + '"' +
        (index === state.corpusChunkIdx ? " selected" : "") + ">" +
        esc(label + " · " + item.id) + "</option>";
    }).join("");
    $("docTextContent").innerHTML =
      '<div class="chunk-toolbar"><button id="chunkPrevBtn" type="button">← Previous chunk</button>' +
      '<select id="chunkSelect">' + options + "</select>" +
      '<span>' + (state.corpusChunkIdx + 1) + " / " + chunks.length + "</span>" +
      '<button id="chunkNextBtn" type="button">Next chunk →</button></div>' +
      '<div class="chunk-heading"><b>Pages ' + esc(chunk.page_start) + "–" +
      esc(chunk.page_end) + '</b><code>' + esc(chunk.id) + "</code></div>" +
      '<pre class="filing-text">' + esc(chunk.contents) + "</pre>";
    $("chunkSelect").addEventListener("change", function () {
      state.corpusChunkIdx = parseInt(this.value, 10) || 0;
      renderCorpusText(record);
    });
    $("chunkPrevBtn").disabled = state.corpusChunkIdx === 0;
    $("chunkNextBtn").disabled = state.corpusChunkIdx === chunks.length - 1;
    $("chunkPrevBtn").addEventListener("click", function () {
      if (state.corpusChunkIdx > 0) { state.corpusChunkIdx--; renderCorpusText(record); }
    });
    $("chunkNextBtn").addEventListener("click", function () {
      if (state.corpusChunkIdx < chunks.length - 1) {
        state.corpusChunkIdx++;
        renderCorpusText(record);
      }
    });
  }

  function selectDocByName(name) {
    $("corpusFilter").value = "";
    $("sectorFilter").value = "";
    $("docTypeFilter").value = "";
    state.corpusView = state.corpus.slice();
    state.corpusIdx = 0;
    state.corpusView.some(function (doc, index) {
      if (doc.doc_name !== name) return false;
      state.corpusIdx = index;
      return true;
    });
    rebuildDocSelect();
    renderCorpus();
  }

  /* ---------------- eval tab ---------------- */
  function filterEval() {
    var query = $("evalSearch").value.trim().toLowerCase();
    var type = $("qTypeFilter").value;
    state.evalView = state.questions.filter(function (question) {
      if (type && question.question_type !== type) return false;
      if (query) {
        var haystack = [
          question.question, question.company, question.financebench_id,
          question.answer, question.doc_name, question.justification,
        ].join(" ").toLowerCase();
        if (haystack.indexOf(query) === -1) return false;
      }
      return true;
    });
    var target = findQidIndex(state.evalView);
    if (target >= 0) state.evalIdx = target;
    else if (state.evalIdx >= state.evalView.length) state.evalIdx = 0;
    renderEval();
  }

  function selectEvalByQid(qid) {
    $("evalSearch").value = "";
    $("qTypeFilter").value = "";
    state.evalView = state.questions.slice();
    state.evalIdx = 0;
    state.evalView.some(function (question, index) {
      if (question.financebench_id !== qid) return false;
      state.evalIdx = index;
      return true;
    });
    setMode("eval");
    renderEval();
  }

  function renderEval() {
    var card = $("evalCard");
    if (!state.evalView.length) {
      card.innerHTML = '<div class="empty">No questions match the search.</div>';
      $("evalCounter").textContent = "0 / 0";
      return;
    }
    var question = state.evalView[state.evalIdx];
    rememberQid(question.financebench_id);
    $("evalCounter").textContent = (state.evalIdx + 1) + " / " + state.evalView.length;

    var typeClass = "type-" + (question.question_type || "");
    var badges =
      '<span class="badge id">' + esc(question.financebench_id) + "</span>" +
      (question.question_type ? '<span class="badge ' + typeClass + '">' + esc(question.question_type) + "</span>" : "") +
      (question.company ? '<span class="badge">' + esc(question.company) + "</span>" : "");

    var fields = "";
    if (question.question_reasoning) fields += field("Reasoning type", esc(question.question_reasoning));
    if (question.domain_question_num) fields += field("Domain question #", esc(question.domain_question_num));
    fields += field(
      "Source document",
      '<a class="doclink" data-doc="' + esc(question.doc_name) + '">' + esc(question.doc_name) + " ↗</a>"
    );
    if (question.justification) fields += field("Justification", esc(question.justification));

    var evidence = (question.evidence || []).map(function (item) {
      var head = '<div class="evidence-head"><span class="page-pill">page ' +
        esc(item.evidence_page_num) + "</span>" +
        (item.doc_name ? "<span>" + esc(item.doc_name) + "</span>" : "") + "</div>";
      var text = '<div class="evidence-text">' + esc(item.evidence_text) + "</div>";
      var full = "";
      if (item.evidence_text_full_page && item.evidence_text_full_page !== item.evidence_text) {
        full = '<details class="full-page"><summary>Show full page extract</summary>' +
          '<div class="evidence-text">' + esc(item.evidence_text_full_page) + "</div></details>";
      }
      return '<div class="evidence-item">' + head + text + full + "</div>";
    }).join("");

    card.innerHTML =
      '<div class="badges">' + badges + "</div>" +
      "<h2>" + esc(question.question) + "</h2>" +
      window.TrajectoryUI.gold(question.answer, "Gold") +
      fields +
      field(
        "Evidence (" + (question.evidence || []).length + ")",
        evidence || '<span style="color:var(--muted)">none</span>'
      );
    wireContextLinks(card);
  }

  /* ---------------- run tabs ---------------- */
  function buildRunTabs() {
    var host = $("runTabButtons");
    host.innerHTML = "";
    (state.manifest.runs || []).forEach(function (run) {
      var button = document.createElement("button");
      button.type = "button";
      button.dataset.mode = run.slot;
      button.textContent = run.label;
      button.style.setProperty("--tab-accent", run.accent);
      button.addEventListener("click", function () { activateMode(run.slot); });
      host.appendChild(button);
    });
    var compare = document.createElement("button");
    compare.type = "button";
    compare.dataset.mode = "compare";
    compare.textContent = "Compare";
    compare.style.setProperty("--tab-accent", "#fb7185");
    compare.addEventListener("click", function () { activateMode("compare"); });
    host.appendChild(compare);
  }

  function filterRun() {
    var runState = state.runs[state.mode];
    if (!runState || !runState.index) return;
    var selected = runState.view[runState.idx] && runState.view[runState.idx].qid;
    var query = $("runSearch").value.trim().toLowerCase();
    var status = $("runStatusFilter").value;
    runState.view = runState.index.records.filter(function (record) {
      if (status !== "all" && record.status !== status) return false;
      if (!query) return true;
      var haystack = [
        record.qid, record.question, record.gold, record.prediction,
        record.company, record.doc_name,
      ].join(" ").toLowerCase();
      return haystack.indexOf(query) !== -1;
    });
    runState.idx = 0;
    var sharedIndex = findQidIndex(runState.view);
    if (sharedIndex >= 0) {
      runState.idx = sharedIndex;
    } else if (selected) {
      runState.view.some(function (record, index) {
        if (record.qid !== selected) return false;
        runState.idx = index;
        return true;
      });
    }
    rebuildRunQidSelect(runState);
    renderRun();
  }

  function rebuildRunQidSelect(runState) {
    var select = $("runQidSelect");
    select.innerHTML = "";
    runState.view.forEach(function (record, index) {
      var option = document.createElement("option");
      option.value = String(index);
      option.textContent = record.qid + " · " + shorten(record.question, 72);
      select.appendChild(option);
    });
    select.value = String(runState.idx);
  }

  function renderRunSummary(runState) {
    var meta = runState.meta;
    $("runSummary").style.setProperty("--run-accent", meta.accent);
    $("runSummary").innerHTML =
      '<div><span class="run-title">' + esc(meta.label) + "</span>" +
      '<span class="score-value">' + esc(meta.score.numerator) + "/" +
      esc(meta.score.denominator) + " · " + Number(meta.score.percent).toFixed(2) + "%</span></div>" +
      '<div class="summary-detail">' + esc(meta.answered) + " answered · " +
      esc(meta.missing) + " missing · full-denominator score</div>";
  }

  function renderRun() {
    var runState = state.runs[state.mode];
    if (!runState || !runState.index) return;
    renderRunSummary(runState);
    if (!runState.view.length) {
      $("runCard").innerHTML = '<div class="empty">No records match these filters.</div>';
      $("runCounter").textContent = "0 / 0";
      $("runQidSelect").innerHTML = "";
      return;
    }
    var item = runState.view[runState.idx];
    $("runCounter").textContent = (runState.idx + 1) + " / " + runState.view.length;
    $("runQidSelect").value = String(runState.idx);
    $("runCard").innerHTML = '<div class="empty">Loading ' + esc(item.qid) + "…</div>";
    var expectedMode = state.mode;
    loadShard(runState.cache, item).then(function (record) {
      if (state.mode !== expectedMode) return;
      var current = runState.view[runState.idx];
      if (!current || current.qid !== record.qid) return;
      renderRunRecord(record);
    }).catch(function (error) {
      $("runCard").innerHTML = '<div class="empty">Failed to load record: ' + esc(error) + "</div>";
    });
  }

  function renderRunRecord(record) {
    rememberQid(record.qid);
    var metadata = record.metadata || {};
    var isE2E = state.mode.indexOf("e2e") === 0;
    var badges =
      '<span class="badge id">' + esc(record.qid) + "</span>" +
      statusBadge(record) +
      (metadata.company ? '<span class="badge">' + esc(metadata.company) + "</span>" : "") +
      (metadata.question_type ? '<span class="badge type-' + esc(metadata.question_type) + '">' +
        esc(metadata.question_type) + "</span>" : "") +
      (metadata.question_reasoning ? '<span class="badge">' +
        esc(metadata.question_reasoning) + "</span>" : "");
    var documentLink = metadata.doc_name
      ? '<a data-doc="' + esc(metadata.doc_name) + '">Open ' + esc(metadata.doc_name) + " ↗</a>"
      : "";
    var links = '<div class="context-links"><a data-eval-qid="' + esc(record.qid) +
      '">Open in Eval ↗</a>' + (isE2E ? "" : documentLink) + "</div>";
    var prediction = record.answered
      ? '<div class="response-text">' + esc(record.prediction) + "</div>"
      : '<div class="missing-response">No response was produced. This record counts as incorrect.</div>';

    var judge = "";
    if (record.extracted_answer !== null && record.extracted_answer !== undefined) {
      judge += field("Extracted judge answer", esc(record.extracted_answer));
    }
    if (record.judge_confidence !== null && record.judge_confidence !== undefined) {
      judge += field("Judge confidence", esc(record.judge_confidence) + "%");
    }
    if (record.judge_text) {
      judge += '<details class="detail-block"><summary>Judge details</summary>' +
        '<pre>' + esc(record.judge_text) + "</pre></details>";
    }

    var operational = '<div class="operational-grid">' +
      metric("Stop", record.stop_reason) +
      metric("Finish", record.finish_reason) +
      metric("Turns", record.turns) +
      metric("Tools", formatPairs(record.tool_counts), "", true) +
      metric("Tokens", formatPairs(record.token_usage), "wide", true) +
      (record.failure_reason ? metric("Failure", record.failure_reason, "wide failure") : "") +
      "</div>";

    $("runCard").innerHTML =
      '<div class="badges">' + badges + "</div>" +
      "<h2>" + esc(record.question) + "</h2>" +
      links +
      window.TrajectoryUI.gold(record.gold, "Gold") +
      (isE2E && documentLink
        ? window.TrajectoryUI.supporting("Supporting filing", documentLink)
        : "") +
      field("Prediction", prediction) +
      judge +
      field("Run details", operational) +
      renderTrajectory(record.events || []);
    wireContextLinks($("runCard"));
    window.TrajectoryUI.bind($("runCard"));
  }

  function metric(label, value, cls, isHtml) {
    var display = value === null || value === undefined || value === "" ? "—" : value;
    return '<div class="metric' + (cls ? " " + cls : "") + '"><span>' +
      esc(label) + "</span><div>" + (isHtml ? display : esc(display)) + "</div></div>";
  }

  function renderTrajectory(events) {
    return window.TrajectoryUI.render(events, "Agent trajectory");
  }

  /* ---------------- comparison tab ---------------- */
  function renderCompareSummaries() {
    if (!state.compare) return;
    $("compareSummaries").innerHTML = state.compare.index.runs.map(function (run) {
      return '<div class="score-card" style="--run-accent:' + esc(run.accent) + '">' +
        '<div class="score-card-label">' + esc(run.label) + "</div>" +
        '<div class="score-card-value">' + esc(run.score.numerator) + "/" +
        esc(run.score.denominator) + " <span>" + Number(run.score.percent).toFixed(2) + "%</span></div>" +
        '<div class="score-card-detail">' + esc(run.answered) + " answered · " +
        esc(run.missing) + " missing</div></div>";
    }).join("");
  }

  function filterCompare() {
    if (!state.compare) return;
    var selected = state.compare.view[state.compare.idx] && state.compare.view[state.compare.idx].qid;
    var query = $("compareSearch").value.trim().toLowerCase();
    var filter = $("compareFilter").value;
    state.compare.view = state.compare.index.records.filter(function (record) {
      if (filter === "disagreement" && !record.flags.disagreement) return false;
      if (filter === "missing" && !record.flags.any_missing) return false;
      if (filter === "e2e-only" && !record.flags.only_e2e_correct) return false;
      if (!query) return true;
      return [record.qid, record.question, record.company].join(" ").toLowerCase().indexOf(query) !== -1;
    });
    state.compare.idx = 0;
    var sharedIndex = findQidIndex(state.compare.view);
    if (sharedIndex >= 0) {
      state.compare.idx = sharedIndex;
    } else if (selected) {
      state.compare.view.some(function (record, index) {
        if (record.qid !== selected) return false;
        state.compare.idx = index;
        return true;
      });
    }
    rebuildCompareQidSelect();
    renderCompare();
  }

  function rebuildCompareQidSelect() {
    var select = $("compareQidSelect");
    select.innerHTML = "";
    state.compare.view.forEach(function (record, index) {
      var option = document.createElement("option");
      option.value = String(index);
      option.textContent = record.qid + " · " + shorten(record.question, 72);
      select.appendChild(option);
    });
    select.value = String(state.compare.idx);
  }

  function renderCompare() {
    if (!state.compare) return;
    if (!state.compare.view.length) {
      $("compareCard").innerHTML = '<div class="card"><div class="empty">No questions match this comparison filter.</div></div>';
      $("compareCounter").textContent = "0 / 0";
      $("compareQidSelect").innerHTML = "";
      return;
    }
    var item = state.compare.view[state.compare.idx];
    $("compareCounter").textContent = (state.compare.idx + 1) + " / " + state.compare.view.length;
    $("compareQidSelect").value = String(state.compare.idx);
    $("compareCard").innerHTML = '<div class="card"><div class="empty">Loading ' + esc(item.qid) + "…</div></div>";
    loadShard(state.compare.cache, item).then(function (record) {
      if (state.mode !== "compare") return;
      var current = state.compare.view[state.compare.idx];
      if (!current || current.qid !== record.qid) return;
      renderCompareRecord(record);
    }).catch(function (error) {
      $("compareCard").innerHTML = '<div class="card"><div class="empty">Failed to load record: ' +
        esc(error) + "</div></div>";
    });
  }

  function renderCompareRecord(record) {
    rememberQid(record.qid);
    var metadata = record.metadata || {};
    var badges =
      '<span class="badge id">' + esc(record.qid) + "</span>" +
      (metadata.company ? '<span class="badge">' + esc(metadata.company) + "</span>" : "") +
      (metadata.question_reasoning ? '<span class="badge">' +
        esc(metadata.question_reasoning) + "</span>" : "") +
      (record.flags.disagreement ? '<span class="badge compare-flag">disagreement</span>' : "") +
      (record.flags.any_missing ? '<span class="badge status-missing">any missing</span>' : "");
    var links =
      '<div class="context-links"><a data-eval-qid="' + esc(record.qid) + '">Open in Eval ↗</a>' +
      (metadata.doc_name ? '<a data-doc="' + esc(metadata.doc_name) + '">Open ' +
        esc(metadata.doc_name) + " ↗</a>" : "") + "</div>";
    var columns = state.compare.index.runs.map(function (run) {
      var value = record.runs[run.slot];
      var prediction = value.answered
        ? '<div class="response-text">' + esc(value.prediction) + "</div>"
        : '<div class="missing-response">No response; counted incorrect.</div>';
      var details = [];
      if (value.extracted_answer !== null && value.extracted_answer !== undefined) {
        details.push("<b>Extracted:</b> " + esc(value.extracted_answer));
      }
      if (value.judge_confidence !== null && value.judge_confidence !== undefined) {
        details.push("<b>Confidence:</b> " + esc(value.judge_confidence) + "%");
      }
      if (value.stop_reason || value.finish_reason) {
        details.push("<b>Stop / finish:</b> " + esc(value.stop_reason || "—") +
          " / " + esc(value.finish_reason || "—"));
      }
      if (value.failure_reason) details.push("<b>Failure:</b> " + esc(value.failure_reason));
      return '<article class="compare-run-card" style="--run-accent:' + esc(run.accent) + '">' +
        '<div class="compare-run-head"><h3>' + esc(run.label) + "</h3>" +
        statusBadge(value) + "</div>" +
        prediction +
        (details.length ? '<div class="compare-details">' + details.join("<br>") + "</div>" : "") +
        "</article>";
    }).join("");

    $("compareCard").innerHTML =
      '<div class="card compare-question"><div class="badges">' + badges + "</div>" +
      "<h2>" + esc(record.question) + "</h2>" + links +
      window.TrajectoryUI.gold(record.gold, "Gold") + "</div>" +
      '<div class="compare-grid">' + columns + "</div>";
    wireContextLinks($("compareCard"));
  }

  /* ---------------- mode switching and links ---------------- */
  function wireContextLinks(container) {
    Array.prototype.forEach.call(container.querySelectorAll("[data-doc]"), function (link) {
      link.addEventListener("click", function () {
        setMode("corpus");
        selectDocByName(this.getAttribute("data-doc"));
      });
    });
    Array.prototype.forEach.call(container.querySelectorAll("[data-eval-qid]"), function (link) {
      link.addEventListener("click", function () {
        selectEvalByQid(this.getAttribute("data-eval-qid"));
      });
    });
  }

  function setMode(mode) {
    var previousMode = state.mode;
    var leftStructures = Boolean(window.__e2eStructuresJustClosed);
    window.__e2eStructuresJustClosed = false;
    state.mode = mode;
    if (mode === "eval" && (previousMode !== "eval" || leftStructures)) {
      $("evalSearch").value = "";
      $("qTypeFilter").value = "";
      state.evalView = state.questions.slice();
    }
    if (mode === "eval" && state.evalView.length) {
      var sharedIndex = findQidIndex(state.evalView);
      if (sharedIndex >= 0) state.evalIdx = sharedIndex;
    }
    Array.prototype.forEach.call($("viewToggle").querySelectorAll("[data-mode]"), function (button) {
      button.classList.toggle("active", button.dataset.mode === mode);
    });
    $("corpusControls").style.display = mode === "corpus" ? "" : "none";
    $("evalControls").style.display = mode === "eval" ? "" : "none";
    $("runControls").style.display = isRunMode(mode) ? "" : "none";
    $("compareControls").style.display = mode === "compare" ? "" : "none";
    $("corpusView").style.display = mode === "corpus" ? "flex" : "none";
    $("evalView").style.display = mode === "eval" ? "block" : "none";
    $("runView").style.display = isRunMode(mode) ? "block" : "none";
    $("compareView").style.display = mode === "compare" ? "block" : "none";
    if (mode === "eval" && state.evalView.length) renderEval();
  }

  function activateMode(mode) {
    setMode(mode);
    if (isRunMode(mode)) {
      loadRun(mode).then(function () {
        if (state.mode !== mode) return;
        $("runSearch").value = "";
        $("runStatusFilter").value = "all";
        filterRun();
      }).catch(showLoadError);
    } else if (mode === "compare") {
      loadCompare().then(function () {
        if (state.mode !== "compare") return;
        $("compareSearch").value = "";
        $("compareFilter").value = "all";
        filterCompare();
      }).catch(showLoadError);
    }
  }

  function showLoadError(error) {
    var target = state.mode === "compare" ? $("compareCard") : $("runCard");
    target.innerHTML = '<div class="card"><div class="empty">Failed to load data: ' +
      esc(error) + "</div></div>";
  }

  /* ---------------- wiring ---------------- */
  function wire() {
    $("modeCorpusBtn").addEventListener("click", function () { setMode("corpus"); });
    $("modeEvalBtn").addEventListener("click", function () { setMode("eval"); });

    $("corpusFilter").addEventListener("input", filterCorpus);
    $("sectorFilter").addEventListener("change", filterCorpus);
    $("docTypeFilter").addEventListener("change", filterCorpus);
    $("docSelect").addEventListener("change", function () {
      state.corpusIdx = parseInt(this.value, 10) || 0;
      renderCorpus();
    });
    $("corpusPrevBtn").addEventListener("click", function () {
      if (state.corpusIdx > 0) { state.corpusIdx--; renderCorpus(); }
    });
    $("corpusNextBtn").addEventListener("click", function () {
      if (state.corpusIdx < state.corpusView.length - 1) { state.corpusIdx++; renderCorpus(); }
    });

    $("evalSearchBtn").addEventListener("click", filterEval);
    $("evalSearch").addEventListener("keydown", function (event) {
      if (event.key === "Enter") filterEval();
    });
    $("evalClearBtn").addEventListener("click", function () {
      $("evalSearch").value = ""; $("qTypeFilter").value = ""; filterEval();
    });
    $("qTypeFilter").addEventListener("change", filterEval);
    $("evalPrevBtn").addEventListener("click", function () {
      if (state.evalIdx > 0) { state.evalIdx--; renderEval(); }
    });
    $("evalNextBtn").addEventListener("click", function () {
      if (state.evalIdx < state.evalView.length - 1) { state.evalIdx++; renderEval(); }
    });

    $("runSearch").addEventListener("input", filterRun);
    $("runStatusFilter").addEventListener("change", filterRun);
    $("runQidSelect").addEventListener("change", function () {
      var runState = state.runs[state.mode];
      runState.idx = parseInt(this.value, 10) || 0;
      renderRun();
    });
    $("runPrevBtn").addEventListener("click", function () {
      var runState = state.runs[state.mode];
      if (runState && runState.idx > 0) { runState.idx--; renderRun(); }
    });
    $("runNextBtn").addEventListener("click", function () {
      var runState = state.runs[state.mode];
      if (runState && runState.idx < runState.view.length - 1) {
        runState.idx++; renderRun();
      }
    });

    $("compareSearch").addEventListener("input", filterCompare);
    $("compareFilter").addEventListener("change", filterCompare);
    $("compareQidSelect").addEventListener("change", function () {
      state.compare.idx = parseInt(this.value, 10) || 0;
      renderCompare();
    });
    $("comparePrevBtn").addEventListener("click", function () {
      if (state.compare && state.compare.idx > 0) { state.compare.idx--; renderCompare(); }
    });
    $("compareNextBtn").addEventListener("click", function () {
      if (state.compare && state.compare.idx < state.compare.view.length - 1) {
        state.compare.idx++; renderCompare();
      }
    });

    document.addEventListener("keydown", function (event) {
      var tag = (event.target.tagName || "").toLowerCase();
      if (tag === "input" || tag === "select" || tag === "textarea") return;
      if (event.key !== "ArrowLeft" && event.key !== "ArrowRight") return;
      var direction = event.key === "ArrowLeft" ? "Prev" : "Next";
      if (state.mode === "corpus") $("corpus" + direction + "Btn").click();
      else if (state.mode === "eval") $("eval" + direction + "Btn").click();
      else if (state.mode === "compare") $("compare" + direction + "Btn").click();
      else if (isRunMode(state.mode)) $("run" + direction + "Btn").click();
    });
  }

  /* ---------------- boot ---------------- */
  loadAll().then(function () {
    $("loading").style.display = "none";
    $("sidebarFooter").innerHTML =
      state.corpus.length + " documents · " + state.questions.length + " questions<br>" +
      "Run scores use all " + esc(state.manifest.denominator) + " questions.<br>" +
      '<a href="https://github.com/patronus-ai/financebench" target="_blank" rel="noopener">FinanceBench</a> · ' +
      '<a href="https://huggingface.co/datasets/PatronusAI/financebench" target="_blank" rel="noopener">HF dataset</a>';
    populateCorpusFilters();
    buildRunTabs();
    wire();
    setMode("corpus");
    filterCorpus();
    filterEval();
  }).catch(function (error) {
    $("loading").textContent = "Failed to load data: " + error;
  });
})();