import { createContext, useEffect, useRef, useState } from "react";
import { songsData } from "../assets/assets";

export const PlayerContext = createContext();

const PlayerContextProvider = (props) => {
  const audioRef = useRef();
  const seekBg = useRef();
  const seekBar = useRef();

  const [track, setTrack] = useState(songsData[0]);
  const [playStatus, setPlayStatus] = useState(false);
  const [time, setTime] = useState({
    currentTime: {
      second: 0,
      minute: 0,
    },
    totalTime: {
      second: 0,
      minute: 0,
    },
  });

  const play = () => {
    audioRef.current.play();
    setPlayStatus(true);
  }

  const pause = () => {
    audioRef.current.pause();
    setPlayStatus(false);
  }

  const playWithId = async (id)=>{
    await setTrack(songsData[id]);
    await audioRef.current.play();
    setPlayStatus(true);
  }

  const previous = async ()=> {
    if (track.id>0) {
        await setTrack(songsData[track.id-1]);
        await audioRef.current.play();
        setPlayStatus(true);
    }
  }

  const next = async ()=> {
    if (track.id< songsData.length-1) {
        await setTrack(songsData[track.id+1]);
        await audioRef.current.play();
        setPlayStatus(true);
    }
  }

  const seekSong = async(e) => {
    audioRef.current.currentTime = ((e.nativeEvent.offsetX / seekBg.current.offsetWidth))* audioRef.current.duration;
  }

  useEffect(()=>{
    setTimeout(() => {

        audioRef.current.ontimeupdate = ()=> {
            seekBar.current.style.width = (Math.floor(audioRef.current.currentTime/audioRef.current.duration*100))+"%";
            setTime({
                currentTime: {
                  second: Math.floor(audioRef.current.currentTime % 60),
                  minute: Math.floor(audioRef.current.currentTime / 60),
                },
                totalTime: {
                    second: Math.floor(audioRef.current.duration % 60),
                    minute: Math.floor(audioRef.current.duration / 60),
                },
              })
        }
        
    }, 1000);

  },[audioRef])

  const contextValue = {
    audioRef,
    seekBg,
    seekBar,
    track,setTrack,
    playStatus,setPlayStatus,
    time,setTime,
    play,pause,
    playWithId,
    previous,
    next,
    seekSong
  };

  return (
    <PlayerContext.Provider value={contextValue}>
      {props.children}
    </PlayerContext.Provider>
  );
};

export default PlayerContextProvider;