/*!
 * artplayer-plugin-vtt-thumbnail.js v1.1.0
 * Github: https://github.com/zhw2590582/ArtPlayer
 * (c) 2017-2026 Harvey Zhao
 * Released under the MIT License.
 */
function padEnd(str, targetLength, padString) {
  if (str.length > targetLength) {
    return String(str);
  } else {
    targetLength = targetLength - str.length;
    if (targetLength > padString.length) {
      padString += padString.repeat(targetLength / padString.length);
    }
    return String(str) + padString.slice(0, targetLength);
  }
}
function t2d(time) {
  const arr = time.split(".");
  const left = arr[0].split(":") || [];
  const right = padEnd(arr[1] || "0", 3, "0");
  const ms = Number(right) / 1e3;
  const h = Number(left[left.length - 3] || 0) * 3600;
  const m = Number(left[left.length - 2] || 0) * 60;
  const s = Number(left[left.length - 1] || 0);
  return h + m + s + ms;
}
async function getVttArray(vttUrl = "") {
  const vttString = await (await fetch(vttUrl)).text();
  const lines = vttString.split(/[\n\r]/g).filter((item) => item.trim());
  const vttArray = [];
  for (let i = 1; i < lines.length; i += 2) {
    const time = lines[i];
    const text = lines[i + 1];
    if (!text.trim())
      continue;
    const timeReg = /((?:\d{2}:)?(?:\d{2}:)?\d{2}(?:.\d{3})?) ?--> ?((?:\d{2}:)?(?:\d{2}:)?\d{2}(?:.\d{3})?)/;
    const timeMatch = time.match(timeReg);
    const textReg = /(.*)#(\w{4})=(.*)/;
    const textMatch = text.match(textReg);
    const start = Math.floor(t2d(timeMatch[1]));
    const end = Math.floor(t2d(timeMatch[2]));
    let url = textMatch[1];
    const isAbsoluteUrl = /^\/|(?:https?|ftp|file):\/\//i.test(url);
    if (!isAbsoluteUrl) {
      const urlArr = vttUrl.split("/");
      urlArr.pop();
      urlArr.push(url);
      url = urlArr.join("/");
    }
    const result = { start, end, url };
    const keys = textMatch[2].split("");
    const values = textMatch[3].split(",");
    for (let j = 0; j < keys.length; j++) {
      result[keys[j]] = values[j];
    }
    vttArray.push(result);
  }
  return vttArray;
}
function artplayerPluginVttThumbnail(option) {
  return async (art) => {
    const {
      constructor: {
        utils: { setStyle, isMobile, addClass }
      },
      template: { $progress }
    } = art;
    let timer = null;
    const thumbnails = await getVttArray(option.vtt);
    function showThumbnails($control, find, width) {
      setStyle($control, "backgroundImage", `url(${find.url})`);
      setStyle($control, "height", `${find.h}px`);
      setStyle($control, "width", `${find.w}px`);
      setStyle($control, "backgroundPosition", `-${find.x}px -${find.y}px`);
      if (width <= find.w / 2) {
        setStyle($control, "left", 0);
      } else if (width > $progress.clientWidth - find.w / 2) {
        setStyle($control, "left", `${$progress.clientWidth - find.w}px`);
      } else {
        setStyle($control, "left", `${width - find.w / 2}px`);
      }
    }
    art.controls.add({
      name: "vtt-thumbnail",
      position: "top",
      index: 20,
      style: option.style || {},
      mounted($control) {
        addClass($control, "art-control-thumbnails");
        art.on("setBar", async (type, percentage, event) => {
          const isMobileDroging = type === "played" && event && isMobile;
          if (type === "hover" || isMobileDroging) {
            const width = $progress.clientWidth * percentage;
            const second = percentage * art.duration;
            setStyle($control, "display", "flex");
            const find = thumbnails.find((item) => second >= item.start && second <= item.end);
            if (!find)
              return setStyle($control, "display", "none");
            if (width > 0 && width < $progress.clientWidth) {
              showThumbnails($control, find, width);
            } else {
              if (!isMobile) {
                setStyle($control, "display", "none");
              }
            }
            if (isMobileDroging) {
              clearTimeout(timer);
              timer = setTimeout(() => {
                setStyle($control, "display", "none");
              }, 500);
            }
          }
        });
      }
    });
    return {
      name: "artplayerPluginVttThumbnail"
    };
  };
}
export {
  artplayerPluginVttThumbnail as default
};