import 'dart:convert';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:notube/models/Video.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:notube/videoList/cubit/videos_cubit.dart';
import 'package:path_provider/path_provider.dart';
import 'package:process_run/shell.dart';

import 'dart:developer';

class DLServices {
  late Directory tempDir;
  late String assetName;
  late String ytDlpPath;

  String extractor = '';
  String url = '';

  bool isPlaylist = false;
  String playlistTitle = '';

  List<Video> _videos = [];

  List<Video> get videos => _videos;

  DLServices._();

  static Future<DLServices> init() async {
    debugPrint('Initializing DLServices');
    var dlService = DLServices._();
    await dlService._init();
    return dlService;
  }

  Future<void> _init() async {
    tempDir = await getTemporaryDirectory();
    assetName = 'yt-dlp.exe';
    await copyExecutable();
  }

  Future<void> copyExecutable() async {
    File tempFile = File('${tempDir.path}/$assetName');

    ByteData data = await rootBundle.load('assets/executable/$assetName');
    await tempFile.exists().then((value) {
      if (!value) {
        debugPrint('Copying $assetName to ${tempFile.path}');
        tempFile.writeAsBytes(
            data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes));
      }
    });

    ytDlpPath = tempFile.path;
  }

  Future<void> downloadFile(String url, String format) async {
    debugPrint('Downloading $url in $format format');

    /*
    https://youtu.be/playlist?list=PLk1fi9OrZmvGBdh9BdWIhZImGVDUqls1X
    */
    var command =
        '${url.trim()}  --sub-langs "all,-live_chat" --embed-subs --embed-thumbnail --embed-metadata --windows-filenames --progress -o "temp/%(playlist)s/%(title)s"';

    var shellLinesController = ShellLinesController();
    var shell = Shell(stdout: shellLinesController.sink);

    shellLinesController.stream.listen((line) {
      if (line.contains('[download]')) {
        debugPrint('___Download___');
        debugPrint('%=${line.split('[download]')[1].split(' of')[0].trim()}');
        debugPrint('______');
      }
      debugPrint(line);
    });

    debugPrint('Running $ytDlpPath $command');
    await shell.run('''
      $ytDlpPath $command
    ''');
  }

  Future<void> analyseUrl(String url) async {
    debugPrint('Analyse $url');

    var command = '${url.trim()} -q --flat-playlist -J';

    var shellLinesController = ShellLinesController();
    var shell = Shell(stdout: shellLinesController.sink);

    shellLinesController.stream.listen((line) {
      if (line[0] == '{') {
        var dataInfos = jsonDecode(line);
        extractor = dataInfos['extractor_key'];
        isPlaylist = dataInfos['_type'] == 'playlist';
        if (isPlaylist) {
          playlistTitle = dataInfos['title'];
          for (var video in dataInfos['entries']) {
            videos.add(Video.fromJson(video));
          }
        } else {
          videos.add(Video.fromJson(dataInfos));
        }
      }
    });

    await shell.run('''
      $ytDlpPath $command
    ''');
  }
}