/* =======================================================================
   File: static/js/progress.js
   Purpose:
       Update progress bars dynamically for the current book.
       Expects data from API endpoints via dashboard.js or start.js.
   ======================================================================= */

console.log(">>> progress.js LOADED");

function updateProgressBars(data) {
  console.log(">>> progress.js updateProgressBars() CALLED with:", data);

  if (!data) {
    console.warn(">>> progress.js: NO DATA RECEIVED");
    return;
  }

  // Data format expected:
  // {
  //   download_done,
  //   download_total,
  //   audio_done,
  //   audio_total
  // }

  const barDL = $(".progress-bar-fill");
  const barAU = $(".progress-bar-fill.audio-fill");

  console.log(">>> progress.js barDL =", barDL);
  console.log(">>> progress.js barAU =", barAU);

  const pctDL =
    data.download_total > 0
      ? (100 * data.download_done) / data.download_total
      : 0;

  const pctAU =
    data.audio_total > 0 ? (100 * data.audio_done) / data.audio_total : 0;

  if (barDL) {
    barDL.style.width = pctDL.toFixed(1) + "%";
    console.log(">>> progress.js updated DL bar to", pctDL.toFixed(1) + "%");
  } else {
    console.warn(">>> progress.js: barDL NOT FOUND");
  }

  if (barAU) {
    barAU.style.width = pctAU.toFixed(1) + "%";
    console.log(">>> progress.js updated AU bar to", pctAU.toFixed(1) + "%");
  } else {
    console.warn(">>> progress.js: barAU NOT FOUND");
  }

  // Update textual stats
  const stats = $$(".progress-stats span");
  console.log(">>> progress.js stats elements found:", stats.length);

  // Expected structure: [DL "x/y", DL "pct", AU "x/y", AU "pct"]
  if (stats.length >= 4) {
    stats[0].innerText = `${data.download_done} / ${data.download_total}`;
    stats[1].innerText = pctDL.toFixed(1) + "%";
    stats[2].innerText = `${data.audio_done} / ${data.audio_total}`;
    stats[3].innerText = pctAU.toFixed(1) + "%";

    console.log(">>> progress.js stats updated");
  } else {
    console.warn(
      ">>> progress.js: not enough stats spans, found",
      stats.length
    );
  }
}