import './App.css';
import * as action from './actions'
import * as reducer from './reducers'

import thunk from 'redux-thunk';
import { useEffect, useState } from 'react';
import { createStore, combineReducers, applyMiddleware } from 'redux';
import { Provider, connect } from 'react-redux';
import { Link, Route, Router, Switch, Redirect } from 'react-router-dom';
import createHistory from 'history/createBrowserHistory'

export const getGQL = url =>
  (query, variables = {}) =>
    fetch(url, {
      method: 'POST',
      headers: {
        "Content-Type": "application/json",
        ...(localStorage.authToken ? { "Authorization": "Bearer " + localStorage.authToken } : {})
      },
      body: JSON.stringify({ query, variables })
    })
      .then(res => res.json())
      .then(data => {
        if (data.errors && !data.data) throw new Error(JSON.stringify(data.errors))
        return data.data[Object.keys(data.data)[0]]
      })

const history = createHistory()
const backendURL = "http://player.asmer.fs.a-level.com.ua"
export const gql = getGQL(backendURL + '/graphql')

const store = createStore(
  combineReducers(
    {
      promise: reducer.promiseReducer,
      auth: reducer.authReducer,
      //local: localStoreReducer(promiseReducer, 'locale')
    }
  ), applyMiddleware(thunk)
)

store.subscribe(() => console.log(store.getState()))


//works only once on start of page
if(store.getState().auth?.token) {
  history.push('/player')
  store.dispatch(action.actionGetUserData())
  store.dispatch(action.actionGetUserPlaylists())
} else {
  history.push('/login')
}

export function jwtDecode(token) {
  try {
    let decoded = token.split('.')
    decoded = decoded[1]
    decoded = atob(decoded)
    decoded = JSON.parse(decoded)
    return decoded

  } catch (e) {
    return;
  }
}

const LoginForm = ({ loged, onLogin }) => {
  let [login, setLogin] = useState()
  let [password, setPassword] = useState()
  let [log, setLog] = useState()

  useEffect(() => {
    setLog(loged)
    if (log?.payload && localStorage.authToken) history.push('/player')
  }, [loged, log])

  return (
    <>
      <h1>Web-player</h1>
      <div>
        <h2>Log-in</h2>
        <input type="text" placeholder='Login' onChange={(e) => setLogin(e.target.value)} />
        <br />
        <input type="password" placeholder='Password' onChange={(e) => setPassword(e.target.value)} />
        <br />
        <small style={{ color: 'red' }}>{loged.status === 'REJECTED' || (loged.status === 'RESOLVED' && !loged.payload) ? 'invalid login or password' : ''}</small>
        <br />
        <button
          disabled={!password || !login}
          onClick={() => { onLogin(login, password) }}
        >Login</button>
        <p>- OR -</p>
        <Link to="/registration">Register new user</Link>
      </div>
    </>
  )
}
const LoginFormConnect = connect(state => ({ loged: state.promise.login || {} }), { onLogin: action.actionFullLogin })(LoginForm)

const RegisterForm = ({ onRegister }) => {
  let [login, setLogin] = useState()
  let [password, setPassword] = useState()
  let [password2, setPassword2] = useState()
  return (
    <>
      <h1>Web-player</h1>
      <div>
        <h2>Registration</h2>
        <input type="text" placeholder='Login' onChange={(e) => setLogin(e.target.value)} />
        <br />
        <input type="password" placeholder='Password' onChange={(e) => setPassword(e.target.value)} />
        <br />
        <input disabled={!password} type="password" placeholder='Repeat Password' onChange={(e) => setPassword2(e.target.value)} />
        <br />
        <small style={{ color: 'red' }}>{password2 && password2 !== password ? 'Passwords do not match' : ''}</small>
        <br />
        <button disabled={!password || !login || password2 !== password} onClick={() => onRegister(login, password)}>Register</button>
        <br />
        <Link to="/login">Back to log-in page</Link>
      </div>
    </>
  )
}
const RegisterFormConnect = connect(null, { onRegister: action.actionRegister })(RegisterForm)

const PlaylistAdd = ({addPlaylist}) => {
  let [clicked, setClicked] = useState(false)
  let [name, setName] = useState()
  return (
    <div>
      {
        !clicked?
          <button 
            style={{ border: '1px solid black', backgroundColor: 'mediumseagreen',width : '95%',padding: '5px', margin: '5px' }}
            onClick={() => setClicked(true)}
          >NEW PLAYLIST</button>
          :
          <div style={{width : '95%', margin:'0 auto'}}>
            <input 
              style={{width:'72%', padding:'5px'}} 
              placeholder='Playlist name'
              value={name}
              onChange={(e) => setName(e.target.value)}
            />

            <button
              disabled={!name}
              style={{padding:'5px', backgroundColor:'mediumseagreen'}}
              onClick={() => {addPlaylist(name); setClicked(false); setName('');}}
            >+</button>

            <button
              style={{padding:'5px', backgroundColor:'red'}} 
              onClick={() => {setClicked(false); setName('')}}
            >X</button>
          </div>
      }
    </div>
  )
}
const PlaylistAddConnect = connect(null, {addPlaylist: action.actionAddPlaylist})(PlaylistAdd)

const Playlists = ({playlists}) => {
  return (
    <div style={{backgroundColor: 'lightcyan'}}>
      <PlaylistAddConnect />
      {
        playlists?.payload? playlists.payload.map(item => {
          return (
            <Link 
              style={{display:'block', backgroundColor: 'darkcyan', color: 'cyan', margin: '5px', padding:'5px'}} 
              to={`${history.location.pathname}/playlist/:${item._id}`}
            >{item.name}</Link>
          )
        }) : '' 
      } 
    </div>
  )
}
const PlaylistsConnect = connect(state => ({playlists: state.promise.userPlaylists || {}}))(Playlists)

const Track = ({track:{url, originalFileName, id3:{title, artist, album}}}) =>
    <li style={{border: '1px solid black', display:'flex', alignItems:'center'}}>
      <div style={{marginRight:'2%'}}>
        <button style={{padding: '10px', margin:'2px'}}> {`>`} </button>
        <button style={{padding: '10px', margin:'2px'}}>| |</button>
        <br/>
        <button style={{padding: '10px', margin:'2px'}}>Add to...</button>
      </div>
      <div style={{textAlign: 'left'}}>
        <h5>{artist || 'Artist: unknown'}</h5> 
        <h6>{album || 'Album: unknown'}</h6>
        <h5>{title || originalFileName}</h5>
        <p>{url}</p>
      </div>
    </li>

const Playlist = ({playlist}) =>
    <>
      <h2>{playlist[0]?.name || 'Playlist'}</h2>
      <ul>
        {(playlist[0]?.tracks || []).map(track => <Track track={track}/>)}
      </ul>
    </>

const PlaylistConnect = connect(state => ({playlist: state.promise.playlistTracks?.payload || []}))(Playlist)

const PlaylistPage = ({match: {params: {_id}}, getTracks}) => {
  useEffect(() => {
    console.log('BANG', _id)
    getTracks(_id.substring(1))
    //getTracks()
  }, [_id])
  return(<PlaylistConnect />)
}
const PlaylistPageConnect = connect(null, {getTracks: action.actionGetPlaylistById})(PlaylistPage)


const UserTracks = ({user, tracks}) =>
  <>
    <h2>{ user.login || 'My' } tracks:</h2>
    <ul>
      {(tracks || []).map(track => <Track track={track}/>)}
    </ul>
  </>

const UserTracksConnect = connect(state => ({
    tracks: state.promise.userTracks?.payload || [], 
    user: state.promise.userData?.payload || {}
  })
)(UserTracks)

const UserTracksPage = ({match: {params: {_id}}, getUserTracks}) => {
  useEffect(() => {
    getUserTracks()
  },[_id])
  return(<UserTracksConnect/>)
}
const UserTracksPageConnect = connect(null, {getUserTracks: action.actionGetUserTracks})(UserTracksPage)

const Player = ({ user, playlists, onLogout }) => {
  let [userInfo, setUserInfo] = useState(user.payload)
  let [userPlaylists, setPlaylists] = useState(user.payload)

  useEffect(()=> {
    setUserInfo(user.payload)
    setPlaylists(playlists.payload)
    console.log(userPlaylists)
  },[user, playlists, userInfo, userPlaylists])
  
  return (
    <>
      <header>Player</header>
      <div style={{ display: 'flex' }}>
        <aside style={{ border: '1px solid black', width: '30%' }}>
          <div
            style={{ border: '1px solid black', backgroundColor: 'red', color: 'white' }}
            onClick={() => { onLogout(); history.push('/login') }}
          >log-out[X]</div>
          {/* profile window */}
          <div style={{border:'1px solid chartreuse'}}>
            <h3>{userInfo?.login || 'user'}</h3>         
            <img 
              width={100} 
              height={100}  
              style={{ border: '1px solid black', display:'block', margin:'5% auto', marginBottom:'2px'}}
              src={ userInfo?.avatar?.url ? backendURL + '/' + userInfo?.avatar?.url : ''}
              alt='avatar' 
            />
            <small>change avavtar</small>
          </div>
          <Link 
            style={{display:'block', backgroundColor: 'purple', color: 'white', margin: '5px', padding:'5px'}} 
            to={`/player/tracks/:${userInfo?._id}`}
          >My tracks</Link>
          <PlaylistsConnect />
        </aside>
        <main style={{ border: '1px solid black', width: '80%' }}>
          <Switch>
            <Route path="/player/playlist/:_id" component={PlaylistPageConnect} exact/>
            <Route path="/player/tracks/:_id" component={UserTracksPageConnect} exact/>
          </Switch>
        </main>
      </div>
      <footer> back stop forw</footer>
    </>
  )
}

const PlayerConnect = connect(
  state => ({
    user: state.promise.userData || {},
    playlists: state.promise.userPlaylists || {}
  }),
  { 
    onLogout: action.actionAuthLogout,
  }
)(Player)


function App() {
  return (
    <Router history={history}>
      <Provider store={store}>
        <div className="App">
          <Switch>
            <Route path="/login" component={LoginFormConnect} exact />
            <Route path="/registration" component={RegisterFormConnect} exact />
            <Route path='/player' component={PlayerConnect} />
          </Switch>
        </div>
      </Provider>
    </Router>
  );
}

export default App;