/**
 * AKSRT Video Player
 *
 * Lightweight HTML5 video player wrapper with support for:
 * - Standard MP4/WebM playback
 * - HLS streaming (lazy-loaded)
 * - FLV streaming (lazy-loaded)
 * - Auto-quality selection
 * - Keyboard shortcuts
 *
 * Usage:
 *   <div class="aksrt-video" data-aksrt-video data-src="video.mp4" data-poster="thumb.jpg"></div>
 *   <div class="aksrt-video" data-aksrt-video data-src="stream.m3u8" data-type="hls"></div>
 *
 * @package AKSRT
 */

(function () {
  'use strict';

  var STYLE_ID = 'aksrt-video-player-style';
  var HLS_SRC = 'https://cdn.jsdelivr.net/npm/hls.js@1/dist/hls.min.js';
  var FLV_SRC = 'https://cdn.jsdelivr.net/npm/flv.js@1/dist/flv.min.js';

  function injectStyle() {
    if (document.getElementById(STYLE_ID)) return;
    var style = document.createElement('style');
    style.id = STYLE_ID;
    style.textContent =
      '.aksrt-video{position:relative;background:#000;border-radius:12px;overflow:hidden;cursor:pointer;}' +
      '.aksrt-video video{display:block;width:100%;height:auto;max-height:70vh;}' +
      '.aksrt-video__overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.3);transition:opacity 0.3s;pointer-events:none;}' +
      '.aksrt-video.is-playing .aksrt-video__overlay{opacity:0;}' +
      '.aksrt-video__play{width:60px;height:60px;border-radius:50%;background:rgba(255,255,255,0.9);display:flex;align-items:center;justify-content:center;font-size:24px;color:#1a1a2e;box-shadow:0 4px 20px rgba(0,0,0,0.3);transition:transform 0.2s;}' +
      '.aksrt-video:hover .aksrt-video__play{transform:scale(1.1);}' +
      '.aksrt-video__badge{position:absolute;top:8px;right:8px;background:rgba(0,0,0,0.6);color:#fff;font-size:11px;padding:2px 8px;border-radius:4px;backdrop-filter:blur(4px);}' +
      '.aksrt-video.is-playing .aksrt-video__badge{display:none;}';
    document.head.appendChild(style);
  }

  function detectType(src) {
    if (!src) return 'mp4';
    if (/\.m3u8(\?|$)/i.test(src)) return 'hls';
    if (/\.flv(\?|$)/i.test(src)) return 'flv';
    return 'mp4';
  }

  function loadScript(src) {
    return new Promise(function (resolve, reject) {
      var script = document.createElement('script');
      script.src = src;
      script.onload = resolve;
      script.onerror = reject;
      document.head.appendChild(script);
    });
  }

  function AksrtVideoPlayer(element) {
    this.el = typeof element === 'string' ? document.querySelector(element) : element;
    if (!this.el || this.el.dataset.aksrtVideoBound) return;
    this.el.dataset.aksrtVideoBound = '1';
    this.el._aksrtPlayer = this;

    this.src = this.el.dataset.src || '';
    this.poster = this.el.dataset.poster || '';
    this.type = this.el.dataset.type || detectType(this.src);
    this.autoplay = this.el.dataset.autoplay === 'true';
    this.loop = this.el.dataset.loop === 'true';
    this.muted = this.el.dataset.muted === 'true' || this.autoplay;
    this.init();
  }

  AksrtVideoPlayer.prototype.init = function () {
    var self = this;

    // Create video element
    this.video = document.createElement('video');
    this.video.controls = true;
    this.video.playsInline = true;
    this.video.preload = this.autoplay ? 'auto' : 'metadata';
    if (this.loop) this.video.loop = true;
    if (this.muted) this.video.muted = true;
    if (this.poster) this.video.poster = this.poster;
    this.video.style.cssText = 'display:block;width:100%;height:100%;object-fit:contain;max-height:none;';

    // Play overlay
    this.overlay = document.createElement('div');
    this.overlay.className = 'aksrt-video__overlay';
    this.overlay.innerHTML = '<div class="aksrt-video__play"><i class="fa fas fa-play" style="margin-left:3px;"></i></div>';

    // Badge
    if (this.type === 'hls') {
      var badge = document.createElement('div');
      badge.className = 'aksrt-video__badge';
      badge.textContent = 'HLS';
      this.el.appendChild(badge);
    }

    this.el.appendChild(this.video);
    this.el.appendChild(this.overlay);

    // Events
    this.el.addEventListener('click', function (e) {
      if (e.target.closest('video') && self.video.controls) return;
      self.toggle();
    });

    this.video.addEventListener('play', function () {
      self.el.classList.add('is-playing');
    });

    this.video.addEventListener('pause', function () {
      self.el.classList.remove('is-playing');
    });

    this.video.addEventListener('ended', function () {
      self.el.classList.remove('is-playing');
    });

    // Keyboard shortcuts
    this.video.addEventListener('keydown', function (e) {
      switch (e.key) {
        case ' ': e.preventDefault(); self.toggle(); break;
        case 'ArrowLeft': self.video.currentTime -= 5; break;
        case 'ArrowRight': self.video.currentTime += 5; break;
        case 'f': self.toggleFullscreen(); break;
        case 'm': self.video.muted = !self.video.muted; break;
      }
    });

    // Load source
    this.loadSource();
  };

  AksrtVideoPlayer.prototype.loadSource = function () {
    var self = this;

    if (this.type === 'hls') {
      if (window.Hls && Hls.isSupported()) {
        this.hls = new Hls();
        this.hls.loadSource(this.src);
        this.hls.attachMedia(this.video);
      } else if (this.video.canPlayType('application/vnd.apple.mpegurl')) {
        // Safari native HLS
        this.video.src = this.src;
      } else {
        // Load hls.js dynamically
        loadScript(HLS_SRC).then(function () {
          if (window.Hls && Hls.isSupported()) {
            self.hls = new Hls();
            self.hls.loadSource(self.src);
            self.hls.attachMedia(self.video);
          }
        });
      }
    } else if (this.type === 'flv') {
      loadScript(FLV_SRC).then(function () {
        if (window.flvjs && flvjs.isSupported()) {
          self.flvPlayer = flvjs.createPlayer({ type: 'flv', url: self.src });
          self.flvPlayer.attachMediaElement(self.video);
          self.flvPlayer.load();
        }
      });
    } else {
      this.video.src = this.src;
    }

    if (this.autoplay) {
      this.video.play().catch(function () { /* autoplay blocked */ });
    }
  };

  AksrtVideoPlayer.prototype.toggle = function () {
    if (this.video.paused) {
      this.video.play();
    } else {
      this.video.pause();
    }
  };

  AksrtVideoPlayer.prototype.toggleFullscreen = function () {
    if (document.fullscreenElement) {
      document.exitFullscreen();
    } else if (this.el.requestFullscreen) {
      this.el.requestFullscreen();
    }
  };

  AksrtVideoPlayer.prototype.destroy = function () {
    if (this.hls) { this.hls.destroy(); this.hls = null; }
    if (this.flvPlayer) { this.flvPlayer.destroy(); this.flvPlayer = null; }
    this.video.src = '';
    this.el.innerHTML = '';
    delete this.el.dataset.aksrtVideoBound;
  };

  /**
   * 切换视频源（剧集切换）
   * @param {string} src - 新视频地址
   * @param {string} [type] - 可选类型 (mp4/hls/flv)
   * @param {string} [poster] - 可选封面
   */
  AksrtVideoPlayer.prototype.switchSource = function (src, type, poster) {
    if (!src) return;

    // 清理旧播放器
    if (this.hls) { this.hls.destroy(); this.hls = null; }
    if (this.flvPlayer) { this.flvPlayer.destroy(); this.flvPlayer = null; }

    this.src = src;
    this.type = type || detectType(src);
    if (poster) {
      this.poster = poster;
      this.video.poster = poster;
    }

    this.video.src = '';
    this.loadSource();
  };

  // ── 剧集切换按钮事件委托 ──
  document.addEventListener('click', function (e) {
    var switchBtn = e.target.closest('.switch-video, .switch-iframe');
    if (!switchBtn) return;

    var container = switchBtn.closest('.aksrt-video') || switchBtn.closest('[data-aksrt-video]');
    // Single cover: episodes sit in .single-video-footer; player is sibling under .single-video
    if (!container) {
      var singleVideo = switchBtn.closest('.single-video, .single-head-cover');
      if (singleVideo) {
        container = singleVideo.querySelector('.aksrt-video, [data-aksrt-video]');
      }
    }
    if (!container) return;

    var src = switchBtn.dataset.src || switchBtn.getAttribute('video-url') || switchBtn.getAttribute('href');
    if (!src) return;

    e.preventDefault();

    // 检查是否已有播放器实例
    if (container._aksrtPlayer) {
      container._aksrtPlayer.switchSource(src, switchBtn.dataset.type);
    } else {
      container.dataset.src = src;
      if (switchBtn.dataset.type) container.dataset.type = switchBtn.dataset.type;
      new AksrtVideoPlayer(container);
    }

    // 高亮当前集
    var scope = switchBtn.closest('.featured-video-episode') || (container.parentElement || document);
    var siblings = scope.querySelectorAll('.switch-video, .switch-iframe');
    siblings.forEach(function (btn) {
      btn.classList.remove('is-active');
      btn.classList.remove('active');
    });
    switchBtn.classList.add('is-active');
    switchBtn.classList.add('active');
  });

  // ── Public API ──

  window.AksrtVideoPlayer = AksrtVideoPlayer;

  // ── Auto-init ──

  function init() {
    injectStyle();
    document.querySelectorAll('[data-aksrt-video]').forEach(function (el) {
      new AksrtVideoPlayer(el);
    });
  }

  jQuery(document).off('auto_fun.aksrt-video-player').on('auto_fun.aksrt-video-player', function () { init(document); });
})();