import { Component, OnInit } from '@angular/core';
import { PostsService } from 'app/posts.services';
import { Router } from '@angular/router';
import { MatDialog } from '@angular/material/dialog';
import { CreatePlaylistComponent } from 'app/create-playlist/create-playlist.component';
import { ModifyPlaylistComponent } from 'app/dialogs/modify-playlist/modify-playlist.component';

@Component({
  selector: 'app-custom-playlists',
  templateUrl: './custom-playlists.component.html',
  styleUrls: ['./custom-playlists.component.scss']
})
export class CustomPlaylistsComponent implements OnInit {

  playlists = null;
  playlists_received = false;
  card_size = 'medium';
  downloading_content = {'video': {}, 'audio': {}};

  constructor(private postsService: PostsService, private router: Router, private dialog: MatDialog) { }

  ngOnInit(): void {
    this.postsService.service_initialized.subscribe(init => {
      if (init) {
        this.getAllPlaylists();
      }
    });
  }

  getAllPlaylists() {
    this.playlists_received = false;
    this.postsService.getAllFiles().subscribe(res => {
      this.playlists = res['playlists'];
      this.playlists_received = true;
    });
  }

  // creating a playlist
  openCreatePlaylistDialog() {
    const dialogRef = this.dialog.open(CreatePlaylistComponent, {
      data: {
      }
    });
    dialogRef.afterClosed().subscribe(result => {
      if (result) {
        this.getAllPlaylists();
        this.postsService.openSnackBar('Successfully created playlist!', '');
      } else if (result === false) {
        this.postsService.openSnackBar('ERROR: failed to create playlist!', '');
      }
    });
  }

  goToPlaylist(playlist) {
    const playlistID = playlist.id;
    const type = playlist.type;

    if (playlist) {
      if (this.postsService.config['Extra']['download_only_mode']) {
        this.downloading_content[type][playlistID] = true;
        this.downloadPlaylist(playlist.fileNames, type, playlist.name, playlistID);
      } else {
        localStorage.setItem('player_navigator', this.router.url);
        const fileNames = playlist.fileNames;
        this.router.navigate(['/player', {fileNames: fileNames.join('|nvr|'), type: type, id: playlistID, uid: playlistID}]);
      }
    } else {
      // playlist not found
      console.error(`Playlist with ID ${playlistID} not found!`);
    }
  }

  downloadPlaylist(fileNames, type, zipName = null, playlistID = null) {
    this.postsService.downloadFileFromServer(fileNames, type, zipName).subscribe(res => {
      if (playlistID) { this.downloading_content[type][playlistID] = false };
      const blob: Blob = res;
      saveAs(blob, zipName + '.zip');
    });

  }

  deletePlaylist(args) {
    const playlist = args.file;
    const index = args.index;
    const playlistID = playlist.id;
    this.postsService.removePlaylist(playlistID, 'audio').subscribe(res => {
      if (res['success']) {
        this.playlists.splice(index, 1);
        this.postsService.openSnackBar('Playlist successfully removed.', '');
      }
      this.getAllPlaylists();
    });
  }
  
  editPlaylistDialog(args) {
    const playlist = args.playlist;
    const index = args.index;
    const dialogRef = this.dialog.open(ModifyPlaylistComponent, {
      data: {
        playlist: playlist,
        width: '65vw'
      }
    });

    dialogRef.afterClosed().subscribe(res => {
      // updates playlist in file manager if it changed
      if (dialogRef.componentInstance.playlist_updated) {
        this.playlists[index] = dialogRef.componentInstance.original_playlist;
      }
    });
  }

}