/**
 * 00c-download-missing.js — Programmatic download (fetch+blob) via the war.gov UI
 *
 * Improved over the previous version:
 *  - Uses fetch() to grab the asset from the same origin (browser cookies +
 *    same-origin policy → Akamai accepts).
 *  - Creates a Blob and triggers `<a download="filename">` to control the
 *    filename exactly (no "(1)" duplicates).
 *  - Reads the PDF URL from the modal's download button data and/or thumbnail
 *    src pattern (`/thumbnail/foo.jpg` → `/foo.pdf|.mp4|.jpg`).
 *  - Skips records whose file already exists (best-effort by checking the
 *    expected filename — you can also clear the lists below).
 *
 * USAGE (Chrome on https://www.war.gov/UFO/Release-NN/):
 *   1. Set Chrome download folder to /Users/guto/ufo/raw/ (Settings → Downloads).
 *      For videos, the script will rename to land in /Users/guto/ufo/raw/videos/
 *      after — just MOVE them manually after this finishes.
 *   2. Open DevTools → Console.
 *   3. Paste this whole file. Press Enter.
 *   4. Chrome prompts "Allow multiple downloads" → click **Allow**.
 *   5. Wait ~30s (1s between downloads). Files land in Downloads folder.
 */

(async function downloadMissing() {
  // ============================================================
  // PDFs still missing (Release-01, verified 2026-05-13).
  // The 28 .VID videos are already in /Users/guto/ufo/raw/videos/ from
  // a prior bulk download — they share file names like DOD_111688723.mp4.
  // ============================================================
  const TARGETS = [
    "record-140",  // NASA-UAP-D003 GEMINI 7 TRANSCRIPT 1965
    "record-154",  // STATE CABLE 003 TBILISI GEORGIA
    "record-155",  // STATE CABLE 004 ASHGABAT TURKMENISTAN
    "record-156",  // STATE CABLE 005 MEXICO
  ];
  console.log(`[dl] ${TARGETS.length} records to download`);

  // ----------------------------------------------------------------------

  const sleep = ms => new Promise(r => setTimeout(r, ms));
  function pollUntil(predicate, opts = {}) {
    const timeout = opts.timeout ?? 4000;
    const interval = opts.interval ?? 50;
    return new Promise((resolve, reject) => {
      const start = Date.now();
      const tick = () => {
        const v = predicate();
        if (v) return resolve(v);
        if (Date.now() - start > timeout) return reject(new Error("timeout"));
        setTimeout(tick, interval);
      };
      tick();
    });
  }

  async function findRowOnAllPages(recordId) {
    for (let i = 0; i < 25; i++) {
      const row = document.querySelector(`button.record-row[data-record-id="${recordId}"]`);
      if (row) return row;
      const next = document.querySelector("button.pagination-next");
      if (!next || next.disabled || next.getAttribute("aria-disabled") === "true") return null;
      const before = document.querySelector("button.record-row")?.dataset.recordId;
      next.click();
      try {
        await pollUntil(() => {
          const f = document.querySelector("button.record-row")?.dataset.recordId;
          return f && f !== before ? f : null;
        });
      } catch { /* ignore */ }
      await sleep(150);
    }
    return null;
  }

  async function goToFirstPage() {
    const firstBtn = Array.from(document.querySelectorAll(".pagination-button")).find(b => b.innerText.trim() === "1");
    if (firstBtn) { firstBtn.click(); await sleep(400); return; }
  }

  function buildFilenameFromThumb(thumbUrl, extHint) {
    // .../thumbnail/foo.jpg → foo + ext
    const m = thumbUrl.match(/\/thumbnail\/([^?#]+)\.[a-z]+$/i);
    if (!m) return null;
    const base = decodeURIComponent(m[1]);
    return `${base}${extHint}`;
  }

  function buildAssetUrlFromThumb(thumbUrl, extHint) {
    // strip "/thumbnail/" segment, swap extension
    return thumbUrl.replace("/thumbnail/", "/").replace(/\.[a-z]+$/i, extHint);
  }

  async function downloadOne(recordId) {
    const row = await findRowOnAllPages(recordId);
    if (!row) { console.warn(`  ✗ ${recordId}: row not found`); return false; }
    row.click();
    try {
      await pollUntil(() => document.querySelector(".record-modal-shell"));
    } catch {
      console.warn(`  ✗ ${recordId}: modal didn't open`);
      return false;
    }
    const modal = document.querySelector(".record-modal-shell");
    const kind = (modal.getAttribute("data-record-kind") || "pdf").toLowerCase();
    const title = modal.querySelector("[data-record-modal-title]")?.innerText?.trim() || recordId;
    const docTypeEl = Array.from(modal.querySelectorAll(".record-modal-fact dd"))
      .find(d => d.previousElementSibling?.innerText?.trim() === "Document Type");
    let ext = ".pdf";
    if (docTypeEl) {
      const raw = docTypeEl.innerText.trim().replace(/[\[\]]/g, "").toLowerCase();
      ext = raw.startsWith(".") ? raw : "." + raw;
      // Normalize uncommon: .vid → .mp4 (guess; site serves mp4 for videos), .img → .jpg
      if (ext === ".vid") ext = ".mp4";
      if (ext === ".img") ext = ".jpg";
    }
    const img = modal.querySelector("#record-main-image, img");
    const thumb = img?.src;
    if (!thumb) {
      console.warn(`  ✗ ${recordId}: no thumbnail src — cannot infer URL`);
      const close = document.querySelector(".record-modal-close, [data-record-modal-close]");
      if (close) close.click(); await sleep(300);
      return false;
    }
    const assetUrl = buildAssetUrlFromThumb(thumb, ext);
    const filename = buildFilenameFromThumb(thumb, ext) || `${recordId}${ext}`;
    console.log(`  ↓ ${recordId}: fetching "${filename}" from ${assetUrl}`);
    try {
      const res = await fetch(assetUrl, { credentials: "include", referrer: location.href });
      if (!res.ok) throw new Error(`HTTP ${res.status}`);
      const blob = await res.blob();
      const url = URL.createObjectURL(blob);
      const a = document.createElement("a");
      a.href = url;
      a.download = filename;
      document.body.appendChild(a);
      a.click();
      a.remove();
      setTimeout(() => URL.revokeObjectURL(url), 5000);
      console.log(`  ✓ ${recordId}: ${filename} (${(blob.size/1024/1024).toFixed(2)} MB)`);
    } catch (e) {
      console.warn(`  ✗ ${recordId}: fetch failed — ${e.message}`);
      const close = document.querySelector(".record-modal-close, [data-record-modal-close]");
      if (close) close.click();
      return false;
    }
    const close = document.querySelector(".record-modal-close, [data-record-modal-close]");
    if (close) close.click();
    await sleep(800);
    return true;
  }

  await goToFirstPage();

  let ok = 0, fail = [];
  for (const id of TARGETS) {
    const success = await downloadOne(id);
    if (success) ok++;
    else fail.push(id);
    await sleep(500);
  }
  console.log(`\n[dl] DONE — ok=${ok}, failed=${fail.length}`);
  if (fail.length) console.log("failed:", fail);
  console.log("Move videos from Downloads/ → /Users/guto/ufo/raw/videos/ when done.");
})();