"use strict";
import * as express from "express";
import * as PlayMusic from "playmusic";
import { Observable } from "rxjs/Observable";
import { Player } from "../player";
import { Config } from "./../config";

module Route {
  export class GoogleMusicPlay {
    libraryDB: any[] = [];
    pm;
    self;
    private player: Player;
    private configuration: Config;

    constructor(private _configuration: Config) {
      this.configuration = _configuration;
      this.player = new Player(this.configuration);
      this.init();
    }

    private init() {
      const self = this;
      var username = this.configuration.getGoogleUsername();
      var password = this.configuration.getGooglePassword();
      this.pm = new PlayMusic();
      if (username && password) {
        this.pm.init({ email: username, password: password }, function(err) {
          if (err) {
            console.error("Cannot login to GooglePlay Music");
          } else {
            console.log("Initialized GoogleMusicPlay");
            self.refreshLibrary();
          }
        });
      }
    }

    public index = (
      req: express.Request,
      res: express.Response,
      next: express.NextFunction
    ): void => {
      if (!this.pm) {
        res.send(JSON.stringify({ error: "PlayMusic not initialized" }));
        return;
      }
      const id = req.query.id;
      if (!id) {
        res.send(JSON.stringify({ error1: "No id provided" }));
        return;
      }
    };

    public play = (
      req: express.Request,
      res: express.Response,
      next: express.NextFunction
    ): void => {
      if (!req.query.id) {
        res.send(JSON.stringify({ "err:": "No id provided" }));
        return;
      }
      this.resolveStreamUrl(req.query.id).subscribe(
        url => {
          this.player.play(url.url).subscribe(
            r => {
              res.send(this.player.info());
            },
            err => {
              res.send(JSON.stringify(err));
            }
          );
        },
        err => res.send(JSON.stringify(err))
      );
    };

    public library = (
      req: express.Request,
      res: express.Response,
      next: express.NextFunction
    ): void => {
      this.checkPlayMusic(res);
      res.send(JSON.stringify(this.libraryDB));
    };

    private resolveStreamUrl = (id): Observable<any> => {
      return new Observable(observer => {
        this.pm.getStreamUrl(id, function(err, streamUrl) {
          if (err && Object.keys(err).length === 0) {
            observer.error({ error2: JSON.stringify(err) });
            observer.complete();
          }
          // this.pm should exist
          if (!streamUrl && this.pm) {
            console.log(
              "No url, attemp to initialze google play again - not sure why..."
            );
            this.pm.init(
              {
                email: this.configuration.getGoogleUsername(),
                password: this.configuration.getGooglePassword()
              },
              function(err) {
                this.pm.getStreamUrl(id, function(err, streamUrl) {
                  if (err) {
                    observer.error({ error2: JSON.stringify(err) });
                    observer.complete();
                    return;
                  }
                  observer.next({ url: streamUrl });
                  observer.complete();
                });
              }
            );
          } else {
            observer.next({ url: streamUrl });
            observer.complete();
          }
        });
      });
    };

    public search = (
      req: express.Request,
      res: express.Response,
      next: express.NextFunction
    ): void => {
      var self = this;
      if (!self.library || self.library.length == 0) {
        res.send(JSON.stringify({ error: "Library not loaded" }));
        return;
      }
      var search = req.query.search.toLowerCase();
      var data = self.libraryDB.filter(
        i =>
          i.title.toLowerCase().indexOf(search) > -1 ||
          i.artist.toLowerCase().indexOf(search) > -1
      );
      res.send(JSON.stringify(data));
    };

    private checkPlayMusic(res) {
      if (!this.pm) {
        res.send(JSON.stringify({ error: "PlayMusic not initialized" }));
        return;
      }
    }

    private refreshLibrary() {
      this.pm.getAllTracks({ limit: 10000 }, (err, library) => {
        this.libraryDB =
          library &&
          library.data &&
          library.data.items.map(i => {
            return {
              id: i.id,
              title: i.title,
              artist: i.artist,
              album: i.album
            };
          });
        console.log(
          "Library retrieved: " + (this.libraryDB && this.libraryDB.length)
        );
      });
    }
  }
}

export = Route;