<template>
  <div class="video-player-container">
    <video
      v-if="useNativePlayer"
      ref="nativeVideoRef"
      class="video-player"
      :src="videoUrlValue"
      :autoplay="props.autoplay"
      :muted="props.autoplay"
      controls
      playsinline
      webkit-playsinline="true"
      x5-playsinline="true"
      x5-video-player-type="h5"
      x5-video-player-fullscreen="true"
      preload="metadata"
      @play="handleNativePlay"
      @pause="handleNativePause"
    />
    <VideoPlayer
      v-else
      ref="videoRef"
      :options="videoOptions"
      playsinline
      :class="['video-player', 'vjs-big-play-centered', { loading: !state }]"
      @mounted="handleMounted"
      @play="handlePlay"
      @pause="handlePause"
    />
    <!-- 错误提示覆盖层 -->
    <div v-if="showErrorOverlay" class="error-overlay">
      <div class="error-content">
        <div class="error-icon">⚠️</div>
        <div class="error-message">{{ errorMessage }}</div>
        <button @click="retryLoad" class="retry-button">重试</button>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref, computed, onMounted, onBeforeUnmount, watch } from "vue";
import { VideoPlayer } from "@videojs-player/vue";
import videojs from "video.js";
import "video.js/dist/video-js.css";
import { wxInfo } from "@/utils/tools"

const props = defineProps({
  options: {
    type: Object,
    required: false,
    default: () => ({}),
  },
  videoUrl: {
    type: String,
    required: true,
  },
  videoId: {
    type: String,
    required: true,
  },
  autoplay: {
    type: Boolean,
    required: false,
    default: true,
  },
});

const emit = defineEmits(["onPlay", "onPause"]);
const videoRef = ref(null);
const nativeVideoRef = ref(null);
const player = ref(null);
const state = ref(null);
const showErrorOverlay = ref(false);
const errorMessage = ref('');
const retryCount = ref(0);
const maxRetries = 3;
const nativeReady = ref(false);
let nativeListeners = null;
const probeInfo = ref({
  ok: null,
  status: null,
  content_type: "",
  content_length: null,
  accept_ranges: "",
});
const probeLoading = ref(false);

const useNativePlayer = computed(() => {
  return wxInfo().isIOSWeChat;
});

const videoUrlValue = computed(() => {
  return (props.videoUrl || "").trim();
});

const formatBytes = (bytes) => {
  const size = Number(bytes) || 0;
  if (!size) return "";
  const kb = 1024;
  const mb = kb * 1024;
  const gb = mb * 1024;
  if (size >= gb) return (size / gb).toFixed(2) + "GB";
  if (size >= mb) return (size / mb).toFixed(2) + "MB";
  if (size >= kb) return (size / kb).toFixed(2) + "KB";
  return String(size) + "B";
};

const getErrorHint = () => {
  if (probeInfo.value.status === 403) return "（403：无权限或已过期）";
  if (probeInfo.value.status === 404) return "（404：资源不存在）";
  if (probeInfo.value.status && probeInfo.value.status >= 500) return `（${probeInfo.value.status}：服务器异常）`;

  const len = probeInfo.value.content_length;
  if (len && len >= 1024 * 1024 * 1024) {
    const text = formatBytes(len);
    return text ? `（文件约${text}，建议 WiFi）` : "（文件较大，建议 WiFi）";
  }
  return "";
};

const probeVideo = async () => {
  const url = videoUrlValue.value;
  if (!url || typeof fetch === "undefined") return;
  if (probeLoading.value) return;

  probeLoading.value = true;
  const controller = typeof AbortController !== "undefined" ? new AbortController() : null;
  const timeoutId = setTimeout(() => controller?.abort?.(), 8000);

  const setBaseInfo = (res) => {
    const contentLength = res.headers.get("content-length");
    probeInfo.value = {
      ok: res.ok,
      status: res.status,
      content_type: res.headers.get("content-type") || "",
      content_length: contentLength ? Number(contentLength) || null : null,
      accept_ranges: res.headers.get("accept-ranges") || "",
    };
  };

  try {
    const headRes = await fetch(url, {
      method: "HEAD",
      mode: "cors",
      cache: "no-store",
      signal: controller?.signal,
    });
    setBaseInfo(headRes);
    if (headRes.ok && probeInfo.value.content_length) return;
  } catch (e) {
    probeInfo.value = {
      ok: null,
      status: null,
      content_type: "",
      content_length: null,
      accept_ranges: "",
    };
  } finally {
    clearTimeout(timeoutId);
    probeLoading.value = false;
  }

  const controller2 = typeof AbortController !== "undefined" ? new AbortController() : null;
  const timeoutId2 = setTimeout(() => controller2?.abort?.(), 8000);
  try {
    const rangeRes = await fetch(url, {
      method: "GET",
      mode: "cors",
      cache: "no-store",
      headers: { Range: "bytes=0-1" },
      signal: controller2?.signal,
    });
    const contentRange = rangeRes.headers.get("content-range") || "";
    const match = contentRange.match(/\/(\d+)\s*$/);
    const total = match ? Number(match[1]) || null : null;
    const contentLength = rangeRes.headers.get("content-length");
    probeInfo.value = {
      ok: rangeRes.ok,
      status: rangeRes.status,
      content_type: rangeRes.headers.get("content-type") || "",
      content_length: total || (contentLength ? Number(contentLength) || null : null),
      accept_ranges: rangeRes.headers.get("accept-ranges") || "",
    };
  } catch (e) {
  } finally {
    clearTimeout(timeoutId2);
  }
};

const getVideoMimeType = (url) => {
  const urlText = (url || "").toLowerCase();
  if (urlText.includes(".m3u8")) return "application/x-mpegURL";
  if (urlText.includes(".mp4")) return "video/mp4";
  if (urlText.includes(".mov")) return "video/quicktime";
  return "";
};

const videoSources = computed(() => {
  const type = getVideoMimeType(videoUrlValue.value);
  if (type) {
    return [{ src: videoUrlValue.value, type }];
  }
  return [{ src: videoUrlValue.value }];
});

const videoOptions = computed(() => ({
  controls: true,
  preload: "metadata", // 改为metadata以减少初始加载
  responsive: true,
  autoplay: props.autoplay,
  playsinline: true,
  // 启用倍速播放功能
  playbackRates: [0.5, 0.75, 1, 1.25, 1.5, 2],
  sources: videoSources.value,
  // HTML5配置优化
  html5: {
    vhs: {
      overrideNative: !videojs.browser.IS_SAFARI,
    },
    nativeVideoTracks: false,
    nativeAudioTracks: false,
    nativeTextTracks: false,
  },
  // 错误处理配置
  errorDisplay: true,
  // 网络和加载配置
  techOrder: ['html5'],
  // onPlay: () => emit("onPlay"),
  // onPause: () => emit("onPause"),
  userActions: {
    hotkeys: true,
    doubleClick: true,
  },
  controlBar: {
    progressControl: {
      seekBar: {
        mouseTimeDisplay: {
          keepTooltipsInside: true,
        },
      },
    },
  },
  ...props.options,
}));

const applyNativeError = (mediaError) => {
  if (!mediaError) return;
  showErrorOverlay.value = true;
  switch (mediaError.code) {
    case 4:
      errorMessage.value = '视频格式不支持或无法加载，请检查网络连接' + getErrorHint();
      if (retryCount.value < maxRetries) {
        setTimeout(() => {
          retryLoad();
        }, 1000);
      }
      break;
    case 3:
      errorMessage.value = '视频解码失败，可能是文件损坏';
      break;
    case 2:
      errorMessage.value = '网络连接错误，请检查网络后重试' + getErrorHint();
      if (retryCount.value < maxRetries) {
        setTimeout(() => {
          retryLoad();
        }, 2000);
      }
      break;
    case 1:
      errorMessage.value = '视频加载被中止';
      break;
    default:
      errorMessage.value = '视频播放出现未知错误';
  }
};

const handleMounted = (payload) => {
  console.log('VideoPlayer: handleMounted 被调用');
  console.log('VideoPlayer: payload.player:', payload.player);
  state.value = payload.state;
  player.value = payload.player;
  if (player.value) {
    // 添加错误处理监听器
    player.value.on('error', (error) => {
      console.error('VideoJS播放错误:', error);
      const errorCode = player.value.error();
      if (errorCode) {
        console.error('错误代码:', errorCode.code, '错误信息:', errorCode.message);

        // 显示用户友好的错误信息
        showErrorOverlay.value = true;

        // 根据错误类型进行处理
        switch (errorCode.code) {
          case 4: // MEDIA_ERR_SRC_NOT_SUPPORTED
            errorMessage.value = '视频格式不支持或无法加载，请检查网络连接' + getErrorHint();
            console.warn('视频格式不支持，尝试重新加载...');
            // 自动重试（如果重试次数未超限）
            if (retryCount.value < maxRetries) {
              setTimeout(() => {
                retryLoad();
              }, 1000);
            }
            break;
          case 3: // MEDIA_ERR_DECODE
            errorMessage.value = '视频解码失败，可能是文件损坏';
            console.warn('视频解码错误');
            break;
          case 2: // MEDIA_ERR_NETWORK
            errorMessage.value = '网络连接错误，请检查网络后重试' + getErrorHint();
            console.warn('网络错误，尝试重新加载...');
            if (retryCount.value < maxRetries) {
              setTimeout(() => {
                retryLoad();
              }, 2000);
            }
            break;
          case 1: // MEDIA_ERR_ABORTED
            errorMessage.value = '视频加载被中止';
            console.warn('视频加载被中止');
            break;
          default:
            errorMessage.value = '视频播放出现未知错误';
        }
      }
    });

    // 添加加载状态监听
    player.value.on('loadstart', () => {
      console.log('开始加载视频');
      showErrorOverlay.value = false; // 隐藏错误提示
    });

    player.value.on('canplay', () => {
      console.log('视频可以播放');
      showErrorOverlay.value = false; // 隐藏错误提示
      retryCount.value = 0; // 重置重试计数
    });

    player.value.on('loadedmetadata', () => {
      console.log('视频元数据加载完成');
    });

    // TAG: 自动播放
    if (props.autoplay) {
      player.value.play().catch(error => {
        console.warn('自动播放失败:', error);
      });
    }

    // if (!wxInfo().isPc && !wxInfo().isWeiXinDesktop) { // 非PC端，且非微信PC端
    //   // 监听视频播放状态
    //   player.value.on('play', () => {
    //     // 播放时隐藏controls
    //     // player.value.controlBar.hide();
    //   });
    //   player.value.on('pause', () => {

    //   })
    //   // 添加touchstart事件监听
    //   player.value.on('touchstart', (event) => {
    //     // 阻止事件冒泡，避免触发controls的默认行为
    //     event.preventDefault();
    //     event.stopPropagation();

    //     // 检查点击位置是否在controls区域
    //     const controlBar = player.value.getChild('ControlBar');
    //     const controlBarEl = controlBar && controlBar.el();
    //     if (controlBarEl && controlBarEl.contains(event.target)) {
    //       return; // 如果点击在controls区域，不执行自定义行为
    //     }

    //     if (player.value.paused()) {
    //       player.value.play();
    //     } else {
    //       player.value.pause();
    //     }
    //   });
    // }
  }
};

const handlePlay = (payload) => {
  emit("onPlay", payload)
};
const handlePause = (payload) => {
  emit("onPause", payload)
}

const handleNativePlay = (event) => {
  emit("onPlay", event)
};

const handleNativePause = (event) => {
  emit("onPause", event)
};

const tryNativePlay = () => {
  const videoEl = nativeVideoRef.value;
  if (!videoEl) return;

  const playPromise = videoEl.play();
  if (playPromise && typeof playPromise.catch === "function") {
    playPromise.catch(() => {
      if (typeof window !== "undefined" && window.WeixinJSBridge) {
        window.WeixinJSBridge.invoke("getNetworkType", {}, () => {
          videoEl.play().catch(() => { });
        });
      }
    });
  }
};

/**
 * 重试加载视频
 */
const retryLoad = () => {
  if (retryCount.value >= maxRetries) {
    errorMessage.value = '重试次数已达上限，请稍后再试';
    return;
  }

  retryCount.value++;
  showErrorOverlay.value = false;

  if (useNativePlayer.value) {
    const videoEl = nativeVideoRef.value;
    if (videoEl) {
      console.log(`第${retryCount.value}次重试加载视频`);
      nativeReady.value = false;
      const currentSrc = videoEl.currentSrc || videoEl.src;
      videoEl.pause();
      videoEl.removeAttribute("src");
      videoEl.load();
      videoEl.src = currentSrc || videoUrlValue.value;
      videoEl.load();
      tryNativePlay();
    }
    return;
  }

  if (player.value && !player.value.isDisposed()) {
    console.log(`第${retryCount.value}次重试加载视频`);
    player.value.load();
  }
};

onMounted(() => {
  void probeVideo();
  if (!useNativePlayer.value) return;

  const videoEl = nativeVideoRef.value;
  if (!videoEl) return;

  const onLoadStart = () => {
    showErrorOverlay.value = false;
    nativeReady.value = false;
  };

  const onCanPlay = () => {
    showErrorOverlay.value = false;
    retryCount.value = 0;
    nativeReady.value = true;
  };

  const onError = () => {
    applyNativeError(videoEl.error);
  };

  videoEl.addEventListener("loadstart", onLoadStart);
  videoEl.addEventListener("canplay", onCanPlay);
  videoEl.addEventListener("error", onError);
  nativeListeners = { videoEl, onLoadStart, onCanPlay, onError };

  if (props.autoplay) {
    tryNativePlay();
    if (typeof document !== "undefined") {
      document.addEventListener(
        "WeixinJSBridgeReady",
        () => {
          tryNativePlay();
        },
        { once: true }
      );
    }
  }

});

onBeforeUnmount(() => {
  if (nativeListeners?.videoEl) {
    nativeListeners.videoEl.removeEventListener("loadstart", nativeListeners.onLoadStart);
    nativeListeners.videoEl.removeEventListener("canplay", nativeListeners.onCanPlay);
    nativeListeners.videoEl.removeEventListener("error", nativeListeners.onError);
    nativeListeners = null;
  }

  if (videoRef.value?.$player) {
    videoRef.value.$player.dispose();
  }
});

watch(
  () => videoUrlValue.value,
  () => {
    retryCount.value = 0;
    showErrorOverlay.value = false;
    void probeVideo();
  }
);

defineExpose({
  pause() {
    if (useNativePlayer.value) {
      try {
        nativeVideoRef.value?.pause?.();
        emit('onPause', nativeVideoRef.value);
      } catch (e) {
        console.warn('Video pause error:', e);
      }
      return;
    }

    if (player.value && !player.value.isDisposed && typeof player.value.isDisposed === 'function' && !player.value.isDisposed() && typeof player.value.pause === 'function') {
      try {
        player.value.pause();
        emit('onPause', player.value);
      } catch (e) {
        console.warn('Video pause error:', e);
      }
    }
  },
  play() {
    if (useNativePlayer.value) {
      tryNativePlay();
      return;
    }

    console.log('VideoPlayer: play() 被调用');
    console.log('VideoPlayer: player.value:', player.value);
    console.log('VideoPlayer: player.value?.isDisposed:', player.value?.isDisposed);

    if (!player.value) {
      console.error('VideoPlayer: player.value 不存在，播放器可能还没初始化');
      return;
    }

    if (!player.value.isDisposed || typeof player.value.isDisposed !== 'function') {
      console.error('VideoPlayer: isDisposed 方法不存在');
      return;
    }

    if (player.value.isDisposed()) {
      console.error('VideoPlayer: 播放器已被销毁');
      return;
    }

    console.log('VideoPlayer: 尝试播放视频');

    // 检查视频元素状态
    try {
      const tech = player.value.tech(true);
      if (tech && tech.el) {
        const videoEl = tech.el();
        console.log('VideoPlayer: videoEl.readyState:', videoEl?.readyState, '(0=HAVE_NOTHING, 1=HAVE_METADATA, 2=HAVE_CURRENT_DATA, 3=HAVE_FUTURE_DATA, 4=HAVE_ENOUGH_DATA)');
        console.log('VideoPlayer: videoEl.paused:', videoEl?.paused);
        console.log('VideoPlayer: videoEl.duration:', videoEl?.duration);
        console.log('VideoPlayer: videoEl.src:', videoEl?.src);
      }
    } catch (e) {
      console.warn('VideoPlayer: 无法获取video元素:', e);
    }

    player.value.play()
      .then(() => {
        console.log('VideoPlayer: play() 成功');
      })
      .catch(error => {
        console.error('VideoPlayer: play() 失败:', error.name, error.message);
        // 如果是因为自动播放策略失败，可以静音重试
        if (error.name === 'NotAllowedError') {
          console.log('VideoPlayer: 浏览器阻止自动播放，尝试静音播放');
          player.value.muted(true);
          player.value.play()
            .then(() => {
              console.log('VideoPlayer: 静音播放成功');
            })
            .catch(err => {
              console.error('VideoPlayer: 静音播放也失败:', err);
            });
        }
      });
  },
  getPlayer() {
    return useNativePlayer.value ? nativeVideoRef.value : player.value;
  },
  getId() {
    return props.videoId || "meta_id";
  },
});
</script>

<style scoped>
.video-player-container {
  width: 100%;
  height: 100%;
  position: relative;
}

.video-player {
  width: 100%;
  height: 100%;
  display: block;
  aspect-ratio: 16/9;
}

.video-player.loading {
  opacity: 0.6;
}

/* 错误覆盖层样式 */
.error-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.error-content {
  text-align: center;
  color: white;
  padding: 20px;
}

.error-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.error-message {
  font-size: 16px;
  margin-bottom: 20px;
  line-height: 1.5;
}

.retry-button {
  background: #007bff;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: background-color 0.3s;
}

.retry-button:hover {
  background: #0056b3;
}

:deep(.vjs-big-play-button) {
  display: none !important;
}

/* 倍速播放控件样式优化 */
:deep(.vjs-playback-rate) {
  order: 7;
  position: relative;
  display: flex !important;
  align-items: center;
  z-index: 10;
  margin-right: 12px;
}

/* 隐藏可能存在的图标 */
:deep(.vjs-playback-rate .vjs-icon-chapters) {
  display: none !important;
}

:deep(.vjs-playback-rate .vjs-playback-rate-value) {
  font-size: 1.5em;
  line-height: 2;
  color: #fff;
  background: transparent;
  border-radius: 4px;
  padding: 0 8px;
  margin: 0;
  transition: all 0.3s ease;
  cursor: pointer;
  min-width: auto;
  text-align: center;
  width: auto;
  display: inline-block;
}

:deep(.vjs-playback-rate:hover .vjs-playback-rate-value) {
  background: transparent;
  transform: scale(1.05);
}

/* 菜单容器优化 - 解决遮挡问题 */
:deep(.vjs-playback-rate .vjs-menu) {
  background: rgba(0, 0, 0, 0.95);
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: absolute;
  bottom: 100%;
  right: 0;
  margin-bottom: 8px;
  min-width: 80px;
  max-height: 200px;
  overflow-y: auto;
  z-index: 1000;
}

/* 确保菜单在视口内显示 */
:deep(.vjs-playback-rate .vjs-menu.vjs-lock-showing) {
  display: block !important;
  opacity: 1 !important;
  visibility: visible !important;
}

:deep(.vjs-playback-rate .vjs-menu-content) {
  padding: 4px 0;
}

:deep(.vjs-playback-rate .vjs-menu-item) {
  color: #fff;
  padding: 10px 16px;
  font-size: 14px;
  transition: all 0.2s ease;
  border-radius: 4px;
  margin: 2px 4px;
  cursor: pointer;
  white-space: nowrap;
  text-align: center;
}

:deep(.vjs-playback-rate .vjs-menu-item:hover) {
  background: rgba(255, 255, 255, 0.15);
  transform: translateX(2px);
}

:deep(.vjs-playback-rate .vjs-menu-item.vjs-selected) {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  font-weight: 600;
}

/* 移动端优化 */
@media (max-width: 768px) {
  :deep(.vjs-playback-rate) {
    display: flex !important;
    visibility: visible !important;
    margin-right: 8px;
  }

  :deep(.vjs-playback-rate .vjs-playback-rate-value) {
    font-size: 1.3em;
    padding: 0 6px;
    min-width: auto;
    height: 36px;
    line-height: 36px;
    width: auto;
    margin: 0;
  }

  :deep(.vjs-playback-rate .vjs-menu) {
    min-width: 100px;
    max-height: 180px;
    bottom: 120%;
    right: -10px;
  }

  :deep(.vjs-playback-rate .vjs-menu-item) {
    padding: 12px 16px;
    font-size: 16px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* 小屏幕设备进一步优化 */
@media (max-width: 480px) {
  :deep(.vjs-playback-rate) {
    margin-right: 6px;
  }

  :deep(.vjs-playback-rate .vjs-playback-rate-value) {
    font-size: 1.2em;
    padding: 0 4px;
    min-width: auto;
    height: 32px;
    line-height: 32px;
    width: auto;
    margin: 0;
  }

  :deep(.vjs-playback-rate .vjs-menu) {
    min-width: 90px;
    right: -5px;
  }

  :deep(.vjs-playback-rate .vjs-menu-item) {
    padding: 10px 12px;
    font-size: 15px;
    min-height: 40px;
  }
}
</style>