import React, { useState, useEffect } from 'react';
import {
  View,
  Text,
  StyleSheet,
  Dimensions,
  PanResponder,
  ScrollView,
  Image,
  Platform,
  StatusBar
} from 'react-native';

import { Slider, Icon } from 'react-native-elements';
import Animated, { Easing } from 'react-native-reanimated';
import { State, PanGestureHandler } from 'react-native-gesture-handler';
import { getStatusBarHeight } from '../utils/StatusBarHeight';
import C from 'rn-class';
import PlayerControls from '../components/PlayerControls';
import PlayerContents from '../components/PlayerContents';
import { getInset } from 'react-native-safe-area-view';

const { width, height } = Dimensions.get('window');
const statusBarHeight = getStatusBarHeight();
const minHeight = height * 0.1;
const midBound = height - height / 2.5; 
const upperBound = 
  height > 560
    ?height * 0.75 - getInset('bottom')
    :height * 0.70;

const {
  Value,
  event,
  Extrapolate,
  cond,
  Clock,
  eq,
  set,
  add,
  sub,
  multiply,
  lessThan,
  clockRunning,
  startClock,
  spring,
  stopClock,
  interpolate,
  timing,
  neq
} = Animated;

const shadow = {
  alignItems: 'center',
  shadowColor: 'black',
  shadowOffset: { width: 0, height: 0 },
  shadowOpacity: 0.18,
  shadowRadius: 2
};
const shadow2 = {
  alignItems: 'center',
  shadowColor: '#000',
  shadowOffset: {
    width: 0,
    height: 7
  },
  shadowOpacity: 0.41,
  shadowRadius: 9.11

  //elevation: 14
};

function runSpring(clock, value, dest) {
  const state = {
    finished: new Value(0),
    velocity: new Value(0),
    position: new Value(0),
    time: new Value(0)
  };

  const config = {
    damping: 20,
    mass: 1,
    stiffness: 100,
    overshootClamping: false,
    restSpeedThreshold: 1,
    restDisplacementThreshold: 0.5,
    toValue: new Value(0)
  };

  return [
    cond(clockRunning(clock), 0, [
      set(state.finished, 0),
      set(state.velocity, 0),
      set(state.position, value),
      set(config.toValue, dest),
      startClock(clock)
    ]),
    spring(clock, state, config),
    cond(state.finished, stopClock(clock)),
    state.position
  ];
}

const Player = props => {
  const translationY = new Value(0);
  const velocityY = new Value(0);
  const offsetY = new Value(0);
  const offsetY2 = new Value(0);
  const gestureState = new Value(State.UNDETERMINED);

  const onGestureEvent = event(
    [
      {
        nativeEvent: {
          translationY,
          velocityY,
          state: gestureState
        }
      }
    ],
    { useNativeDriver: true }
  );
  const clockY = new Clock();
  const finalTranslateY = add(translationY, multiply(0.2, velocityY));
  const snapPoint = cond(
    lessThan(finalTranslateY, sub(offsetY, height / 4)),
    0,
    upperBound
  );
  const ty = cond(
    eq(gestureState, State.END),
    [
      set(
        translationY,
        runSpring(clockY, add(offsetY, translationY), snapPoint)
      ),
      set(offsetY, translationY),
      translationY
    ],
    [
      cond(eq(gestureState, State.BEGAN), stopClock(clockY)),
      add(offsetY, translationY)
    ]
  );

  const translateY = add(ty, offsetY2);
  const opacity = interpolate(translateY, {
    inputRange: [0, midBound - 100],
    outputRange: [1, 0],
    extrapolate: Extrapolate.CLAMP
  });
  const statusBarOpacity = interpolate(translateY, {
    inputRange: [0, statusBarHeight],
    outputRange: [1, 0],
    extrapolateLeft: Extrapolate.CLAMP
  });
  const playContainerWidth = interpolate(translateY, {
    inputRange: [0, midBound],
    outputRange: [width, width - 16],
    extrapolate: Extrapolate.CLAMP
  });
  const playerContainerHeight = interpolate(translateY, {
    inputRange: [0, midBound],
    outputRange: [height, 0],
    extrapolate: Extrapolate.CLAMP
  });
  const videoWidth = interpolate(translateY, {
    inputRange: [0, midBound, upperBound],
    outputRange: [width, width - 16, width / 4],
    extrapolate: Extrapolate.CLAMP
  });
  const videoHeight = interpolate(translateY, {
    inputRange: [0, midBound, upperBound],
    outputRange: [width / 1.78, minHeight * 1.3, minHeight],
    extrapolate: Extrapolate.CLAMP
  });
  const playerControlOpaciy = interpolate(translateY, {
    inputRange: [midBound, upperBound],
    outputRange: [0, 1],
    extrapolate: Extrapolate.CLAMP
  });

  const playerBoderRadius = interpolate(translateY, {
    inputRange: [midBound, upperBound],
    outputRange: [0, 15],
    extrapolate: Extrapolate.CLAMP
  });
  const mainPlayerContainerHeight = interpolate(translateY, {
    inputRange: [0, midBound, upperBound],
    outputRange: [height, minHeight * 1.3, minHeight],
    extrapolate: Extrapolate.CLAMP
  });
  useEffect(() => {
    return () => {};
  }, []);

  const slideUp = () => {};

  return (
      <PanGestureHandler
        onHandlerStateChange={onGestureEvent}
        activeOffsetY={[-10, 10]}
        {...{ onGestureEvent }}
      >
        <Animated.View
          style={{
            ...StyleSheet.absoluteFillObject,
            flex:0.1,
            zIndex: 10,
            marginTop: statusBarHeight,
            transform: [{ translateY }],
            alignItems: 'center',
            height: mainPlayerContainerHeight,
        
          }}
        >
          <Animated.View
            style={{
              padding: 5,
              backgroundColor: 'white',
              width: playContainerWidth,
              borderRadius: playerBoderRadius
            }}
          >
            <Animated.View
              style={[
                Platform.OS === 'android'
                  ? { borderColor: '#eee' }
                  : { borderColor: 'white' },
                {
                  ...StyleSheet.absoluteFillObject,
                  borderWidth: 1,
                  borderRadius: 15,
                  opacity: playerControlOpaciy,
                  backgroundColor: 'white'
                },
                shadow2
              ]}
            >
              <PlayerControls
                {...props}
                title={props.Pages.subtitle}
                slideup={slideUp}
                closePlayer={props.closePlayer}
              />
            </Animated.View>
            <Animated.View style={{ width: videoWidth, height: videoHeight }}>
              <Image
                resizeMode="contain"
                style={{ flex: 1, width: null, height: null }}
                source={props.Pages.img}
              />
            </Animated.View>
          </Animated.View>
          <Animated.View
            style={{
              backgroundColor: 'white',
              width: playContainerWidth,
              height: playerContainerHeight
            }}
          >
            <Animated.View style={{ opacity }}>
              <PlayerContents {...props} />
            </Animated.View>
          </Animated.View>
        </Animated.View>
      </PanGestureHandler>
  );
};

export default Player;