import React, { Component } from "react";
import {
  Platform,
  Text,
  View,
  ImageBackground,
  Button,
  Image,
  TouchableOpacity,
  PanResponder,
  StyleSheet
} from "react-native";
import { createStackNavigator, createAppContainer } from "react-navigation";
import Video from "react-native-video";
import SeekBar from "../components/SeekBar";
const instructions = Platform.select({
  ios: "Press Cmd+R to reload,\n" + "Cmd+D or shake for dev menu",
  android:
    "Double tap R on your keyboard to reload,\n" +
    "Shake or press menu button for dev menu"
});

type Props = {};
export default class CusVideo extends React.Component {
  constructor(props) {
    super(props);
    this.pressStatus = false;
    this.progress = 0;
    this.time_hideController;
  }
  config = {
    changeX: 0,
    changeY: 0,
    xDiff: 0,
    yDiff: 0
  };

  state = {
    player_status_icon: require("../images/video/start.png"),
    rate: 1,
    volume: 1,
    muted: false,
    resizeMode: "stretch",
    duration: 0.0,
    currentTime: 0.0,
    paused: true,
    onBuffer: true,
    wheel: false,
    isFull: false,
    needback: this.props.needback,
    show_controller: true,
    show_loading: true,
    loading_arr: [
      require("../images/video/loading1.png"),
      require("../images/video/loading2.png"),
      require("../images/video/loading3.png"),
      require("../images/video/loading4.png"),
      require("../images/video/loading5.png"),
      require("../images/video/loading6.png"),
      require("../images/video/loading7.png"),
      require("../images/video/loading8.png"),
      require("../images/video/loading9.png"),
      require("../images/video/loading10.png"),
      require("../images/video/loading11.png"),
      require("../images/video/loading12.png"),
      require("../images/video/loading13.png"),
      require("../images/video/loading14.png"),
      require("../images/video/loading15.png"),
      require("../images/video/loading16.png"),
      require("../images/video/loading17.png"),
      require("../images/video/loading18.png"),
      require("../images/video/loading19.png"),
      require("../images/video/loading20.png")
    ]
  };

  render() {
    if (!this.props.show) {
      return null;
    }
    return (
      <View style={[this.props.style, { overflow: "hidden" }]}>
        <Video
          {...this.videotouch.panHandlers}
          style={{ flex: 1 }}
          source={{
            uri: this.props.uri
          }}
          ref={ref => {
            this.player = ref;
          }}
          // poster={this.props.poster}
          resizeMode={[this.state.resizeMode]}
          // posterResizeMode={this.state.resizeMode}
          onBuffer={this.onBuffer.bind(this)}
          rate={this.state.rate} //播放速率
          paused={this.state.paused} //暂停
          volume={this.state.volume} //调节音量
          muted={this.state.muted} //控制音频是否静音
          resizeMode={this.state.resizeMode} //缩放模式
          onLoadStart={this.loadStart} // 当视频开始加载时的回调函数
          onLoad={this.onLoad} //加载媒体并准备播放时调用的回调函数。
          onProgress={this.onProgress} //视频播放过程中每个间隔进度单位调用的回调函数
          onAudioBecomingNoisy={this.onAudioBecomingNoisy} //音频变得嘈杂时的回调 - 应暂停视频
          onAudioFocusChanged={this.onAudioFocusChanged} //音频焦点丢失时的回调 - 如果焦点丢失则暂停
          repeat={this.state.wheel} //确定在到达结尾时是否重复播放视频。
          onError={this.onError.bind(this)} // 当视频不能加载，或出错后的回调函数
          onEnd={this.onEnd.bind(this)} //视频播放结束时的回调函数
          playInBackground={false} // 当app转到后台运行的时候，播放是否暂停
          playWhenInactive={true} // [iOS] Video continues to play when control or notification center are shown. 仅适用于IOS
        />
        <View
          style={{
            position: "absolute",
            width: "100%",
            height: "100%",
            alignItems: "center",
            justifyContent: "center"
          }}
        >
          <Loading
            loading_arr={this.state.loading_arr}
            show={this.state.show_loading}
          />
        </View>
        <TopController
          ref={view => (this.topcontroller = view)}
          needback={this.state.needback}
          videoback={this.videoBackClick.bind(this)}
        />
        <BottomController
          ref={view => (this.bottomcontroller = view)}
          show={this.state.show_controller}
          touch_up_callback={this.touch_up_callback.bind(this)}
          full_click={this.presentFullscreenPlayer.bind(this)}
          play_click={this.play.bind(this)}
          duration={this.state.duration}
          currentTime={this.state.currentTime}
          player_status_icon={this.state.player_status_icon}
        />
      </View>
    );
  }

  componentWillMount() {
    this.videotouch = PanResponder.create({
      onStartShouldSetPanResponder: (evt, gestureState) => true,
      onStartShouldSetPanResponderCapture: (evt, gestureState) => true,
      onMoveShouldSetPanResponder: (evt, gestureState) => true,
      onMoveShouldSetPanResponderCapture: (evt, gestureState) => true,
      onPanResponderGrant: (evt, gestureState) => {
        this.pressStatus = true;
        this.config.changeY = evt.nativeEvent.pageY;
        this.config.changeX = evt.nativeEvent.pageX;
        if (this.state.show_controller) {
          this.hideController();
        } else {
          this.showController();
        }
      },
      onPanResponderStart: (evt, gestureState) => {
        this.pressStatus = true;
      },
      onPanResponderMove: (evt, gestureState) => {
        this.config.yDiff = evt.nativeEvent.pageY - this.config.changeY;
        this.config.xDiff = evt.nativeEvent.pageX - this.config.changeX;
        this.config.changeY = evt.nativeEvent.pageY;
        this.config.changeX = evt.nativeEvent.pageX;
      },
      onPanResponderEnd: (evt, gestureState) => {
        this.pressStatus = true;
      },
      onPanResponderTerminationRequest: (evt, gestureState) => true,
      onPanResponderRelease: (evt, gestureState) => {
        if (this.pressStatus) {
          this.props.onPress && this.props.onPress();
        }
      },
      onPanResponderTerminate: (evt, gestureState) => {
        // 另一个组件已经成为了新的响应者，所以当前手势将被取消。
      },
      onShouldBlockNativeResponder: (evt, gestureState) => {
        // 返回一个布尔值，决定当前组件是否应该阻止原生组件成为JS响应者
        // 默认返回true。目前暂时只支持android。
        //基于业务交互场景，如果这里使用js事件处理，会导致容器不能左右滑动。所以设置成false.
        return false;
      }
    });
  }
  componentWillUnmount() {
    clearTimeout(this.time_hideController);
  }

  loadStart() {
    // alert("loadStart");
  }

  onBuffer({ isBuffering }: { isBuffering: boolean }) {
    //true为正在加载，false为没有加载，此处给loading提示
    this.setState({
      onBuffer: isBuffering,
      show_loading: isBuffering
    });
  }
  isPlaying() {
    if (this.state.onBuffer == false && this.state.paused == false) {
      return true;
    }
    return false;
  }
  onLoad = data => {
    //获取的是秒数
    this.setState({ duration: data.duration });
    // this.bottomcontroller.setMax(data.duration);
  };
  onProgress = data => {
    this.setState({
      currentTime: data.currentTime
    });
    if (this.state.show_controller && this.props.show) {
      this.bottomcontroller.setProgress(this.state.currentTime);
      this.bottomcontroller.setMax(this.state.duration);
    }
  };

  onError() {
    if (this.props.onEnd == undefined) {
    } else {
      this.props.onError();
    }
  }
  onEnd() {
    if (this.props.onEnd == undefined) {
    } else {
      this.props.onEnd();
    }
  }
  play() {
    //controller的play点击无法换图...
    if (this.state.paused) {
      this.start();
    } else {
      this.pause();
    }
  }
  pause() {
    this.setState({
      paused: true,
      player_status_icon: require("../images/video/start.png")
    });
    this.player_icon_index = 1;
  }
  start() {
    this.setState({
      paused: false,
      player_status_icon: require("../images/video/pause.png")
    });
    this.player_icon_index = 0;
    if (this.state.show_controller) {
      this.time_hideController = setTimeout(() => {
        this.setState({
          show_controller: false
          // needback: false
        });
        this.bottomcontroller.setBottom(-50);
        this.topcontroller.setTop(-50);
      }, 5000);
    }
  }

  seekTo(progress) {
    this.player.seek(progress);
  }
  presentFullscreenPlayer() {
    if (this.state.isFull) {
      this.setState({
        isFull: false,
        needback: this.props.needback
      });
    } else {
      this.setState({
        isFull: true,
        needback: true
      });
    }

    this.props.videofullScreenPlayer();
    this.bottomcontroller.setProgress(this.state.currentTime);
  }
  touch_up_callback(progress) {
    //抬起之后，获取算出来的progress
    this.setState({
      currentTime: progress
    });
    this.seekTo(progress);
  }

  refreshVideo() {
    this.setState({
      duration: 0,
      currentTime: 0
    });
    this.bottomcontroller.setProgress(0);
  }

  videoBackClick() {
    // if (this.props.needback != undefined && this.props.needback) {
    // }
    if (this.state.isFull) {
      //全屏状态下，变小屏
      this.presentFullscreenPlayer();
    } else {
      this.props.videoback();
    }
  }
  showController() {
    clearTimeout(this.time_hideController);
    this.setState({
      show_controller: true
      // needback: this.props.needback
    });
    this.bottomcontroller.setBottom(0);
    this.bottomcontroller.setProgress(this.state.currentTime);
    this.topcontroller.setTop(0);
    this.time_hideController = setTimeout(() => {
      this.setState({
        show_controller: false
        // needback: false
      });
      this.bottomcontroller.setBottom(-50);
      this.topcontroller.setTop(-50);
    }, 5000);
  }
  hideController() {
    this.setState({
      show_controller: false
      // needback: false
    });

    this.bottomcontroller.setBottom(-50);
    this.topcontroller.setTop(-50);
  }
  componentWillUnmount() {
    clearTimeout(this.time_hideController);
  }
}

/**
 * 将秒转换为 分:秒
 * s int 秒数
 */
function formatTime(s) {
  //计算分钟
  //算法：将秒数除以60，然后下舍入，既得到分钟数
  var h;
  h = Math.floor(s / 60);
  //计算秒
  //算法：取得秒%60的余数，既得到秒数
  s = Math.round(s % 60);
  //将变量转换为字符串
  h += "";
  s += "";
  //如果只有一位数，前面增加一个0
  h = h.length == 1 ? "0" + h : h;
  s = s.length == 1 ? "0" + s : s;
  return h + ":" + s;
}
class TopController extends Component {
  state = {
    controller_top: 0
  };
  render() {
    if (this.props.needback == false) {
      return null;
    }
    return (
      <View
        style={[styles.player_controller, { top: this.state.controller_top }]}
      >
        <View
          style={{
            flex: 1,
            alignItems: "center"
          }}
        >
          <TouchableOpacity
            //点击事件放在这个组件里才管用
            style={{
              justifyContent: "center",
              width: "100%",
              height: "100%"
            }}
            onPress={() => this.props.videoback()}
          >
            <Image
              style={[styles.player_pause_icon]}
              source={require("../images/video/back.png")}
            />
          </TouchableOpacity>
        </View>
        <View style={{ flex: 2 }} />
        <View
          style={{
            flex: 9,
            overflow: "hidden"
          }}
        />
        <View style={{ flex: 2 }} />
        <View
          style={{
            flex: 1,
            alignItems: "center"
          }}
        />
      </View>
    );
  }

  setTop(top) {
    this.setState({
      controller_top: top
    });
  }
}

class Loading extends Component {
  constructor(props) {
    super(props);
    this.loading_index = 0;
  }
  state = {
    loading_img: this.props.loading_arr[0]
  };
  render() {
    if (this.props.show) {
      return (
        <Image
          source={this.state.loading_img}
          style={{ width: 100, height: 20 }}
        />
      );
    } else {
      return null;
    }
  }
  componentWillMount() {
    this.changeIndex();
  }
  componentWillUnmount() {
    clearTimeout(this.changeindex);
  }

  changeIndex() {
    this.changeindex = setTimeout(() => {
      if (this.loading_index > this.props.loading_arr.length - 2) {
        this.loading_index = 0;
      } else {
        this.loading_index = this.loading_index + 1;
      }
      this.setState({
        loading_img: this.props.loading_arr[this.loading_index]
      });
      this.changeIndex();
    }, 1);
  }
}

class BottomController extends Component {
  state = {
    controller_bottom: 0
  };

  render() {
    return (
      <View
        style={[
          styles.player_controller,
          { bottom: this.state.controller_bottom }
        ]}
      >
        <View
          style={{
            flex: 1,
            alignItems: "center"
          }}
        >
          {/* 暂停播放按钮 */}
          <TouchableOpacity
            //点击事件放在这个组件里才管用
            style={{
              justifyContent: "center",
              width: "100%",
              height: "100%"
            }}
            onPress={() => this.props.play_click()}
          >
            <Image
              style={[styles.player_pause_icon]}
              source={this.props.player_status_icon}
            />
          </TouchableOpacity>
        </View>
        <View style={{ flex: 2 }}>
          {/* //左侧当前播放时长 */}
          <Text style={[styles.player_time]}>
            {formatTime(this.props.currentTime)}
          </Text>
        </View>
        <View
          style={{
            flex: 9,
            overflow: "hidden"
          }}
        >
          {/* //中间进度条 */}
          <SeekBar
            style={{ flex: 1 }}
            ref={view => (this.seekbar = view)}
            //必须带此方法，作为滑动之后抬起的回调
            touchUpCallBack={this.props.touch_up_callback}
          />
        </View>
        <View style={{ flex: 2 }}>
          {/* //右侧总时长 */}
          <Text style={[styles.player_time]}>
            {formatTime(this.props.duration)}
          </Text>
        </View>
        <View
          style={{
            flex: 1,
            alignItems: "center"
          }}
        >
          <TouchableOpacity
            style={{
              justifyContent: "center",
              width: "100%",
              height: "100%"
            }}
            onPress={() => this.props.full_click()}
          >
            {/* //放大按钮 */}
            <Image
              style={[styles.fullscreen_icon]}
              source={require("../images/video/fullscreen.png")}
            />
          </TouchableOpacity>
        </View>
      </View>
    );
  }
  setMax(duration) {
    this.seekbar.setMax(duration);
  }
  getMax() {
    return this.seekbar.getMax();
  }
  setBottom(bottom) {
    this.setState({
      controller_bottom: bottom
    });
  }
  setProgress(currentTime) {
    this.seekbar.setProgress(currentTime);
  }
}
const styles = StyleSheet.create({
  player_controller: {
    flexDirection: "row",
    position: "absolute",
    width: "100%",
    height: 50,
    alignItems: "center",
    justifyContent: "center"
  },
  player_pause_icon: {
    width: "80%",
    resizeMode: "center",
    height: "40%",
    justifyContent: "center",
    alignItems: "center",
    left: 5
  },
  fullscreen_icon: {
    width: "80%",
    resizeMode: "center",
    height: "30%",
    justifyContent: "center",
    alignItems: "center"
  },
  player_time: {
    fontSize: 16,
    color: "white",
    alignItems: "center",
    justifyContent: "center",
    textAlignVertical: "center",
    textAlign: "center"
  }
});

/**
  使用方法
    <CusVideo
          show={this.state.video_show} //是否显示
          uri={this.state.video_uri}  //播放路径
          ref={view => (this.video = view)} //设置ID
          needback={false}
          videoback={() => alert("videoback")}
          videofullScreenPlayer={this.fullScreenPlayer.bind(this)}
          style={{
            left: this.state.x,
            top: this.state.y,
            width: this.state.video_width,
            height: this.state.video_height,
            overflow: "hidden",
            position: "absolute"
          }}
        />


 */