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

import 'package:archive/archive_io.dart';
import 'package:http/http.dart' as http;
import 'package:logging/logging.dart';
import 'package:path_provider/path_provider.dart';
import 'package:fcs/model/firebase_helper.dart';
import 'package:fcs/vo/manual.dart';
import 'package:fcs/vo/setting.dart';
import 'package:path/path.dart' as Path;

import 'base_model.dart';

typedef void SlideDataCallback();

class ManualModel extends BaseModel {
  final log = Logger('ManualModel');

  List<ManualItem> helps = [];
  List<ManualItem> manuals = [];
  String version;
  SlideDataCallback slideDataCallback;
  List deleteImage = [];

  String dataDir;

  void initSetting(Setting setting) async {
    _download(setting);
    super.initSetting(setting);
  }

  @override
  logout() async {}

  Future<void> _download(Setting setting) async {
    this.dataDir = (await getApplicationDocumentsDirectory()).path;
    version = setting.helpVersion;
    var file = File('$dataDir/${setting.helpFileName()}');
    if (await file.exists()) {
      _loadJsonData();
      return;
    }

    String url = setting.helpURL;
    var req = await http.Client().get(Uri.parse(url));

    File zippedFile = await file.writeAsBytes(req.bodyBytes);
    File prev = File('$dataDir/manual');
    if (await prev.exists()) {
      await prev.delete(recursive: true);
    }

    var bytes = zippedFile.readAsBytesSync();
    var archive = ZipDecoder().decodeBytes(bytes);
    for (var file in archive) {
      var fileName = '$dataDir/manual/${file.name}';
      if (file.isFile) {
        var outFile = File(fileName);
        outFile = await outFile.create(recursive: true);
        await outFile.writeAsBytes(file.content);
      }
    }
    _loadJsonData();
  }

  List<ManualItem> getHelpList(bool isBuyer) {
    return helps.where((h) => isBuyer ? h.isBuyer : true).toList();
  }

  getSlideList(int manIndex) {
    var slides = helps[manIndex].slides;
    return slides;
  }

  getSlideData(int manIndex, int slideIndex) {
    var slide;
    slide = helps[manIndex].slides[slideIndex];
    return slide;
  }

  Future<void> _loadJsonData() async {
    try {
      final directory = await getApplicationDocumentsDirectory();
      File file = File('${directory.path}/manual/manual.json');
      String contents = await file.readAsString();

      var convertArray = jsonDecode(contents);
      manuals.clear();
      convertArray.forEach((item) {
        var _list = ManualItem.fromMap(item);
        manuals.add(_list);
      });
    } catch (e) {
      log.warning("Error:${e.toString()}");
    }
    helps.clear();
    helps = manuals.map((e) => ManualItem.clone(e)).toList();
  }

  addManualTitle(ManualItem manualItem) {
    helps.add(manualItem);
    notifyListeners();
  }

  uploadStorageManualData(String version, String dir) async {
    String fileName = 'help-v$version.zip';

    var converthelps = [];
    for (final converthelp in helps) {
      converthelps.add(converthelp.toJson());
    }
    var json = jsonEncode(converthelps);

    Directory myDir = new Directory('$dir/manual/img');
    List _images;
    _images = myDir.listSync(recursive: true, followLinks: false);

    var newImgData = await convertArchiveImgFile(_images, dir, json);
    File updateImgFile = File('$dir/manual/update');
    updateImgFile.writeAsBytesSync(newImgData);

    var bytes = updateImgFile.readAsBytesSync();
    uploadDataZip(bytes, fileName);
  }

  convertArchiveImgFile(List imgList, String dataDir, json) async {
    File file = new File('$dataDir/update');
    if (await file.exists()) {
      await file.delete(recursive: true);
    }

    Archive zipArchive = new Archive();
    List<int> utf8encoded = utf8.encode(json);
    ArchiveFile jsonFile =
        new ArchiveFile("manual.json", utf8encoded.length, utf8encoded);
    zipArchive.addFile(jsonFile);

    for (var img in imgList) {
      String basename = Path.basename(img.path);
      if (deleteImage.length != 0) {
        for (var dImgName in deleteImage) {
          if (dImgName != basename) {
            Uint8List bytesPhoto = img.readAsBytesSync() as Uint8List;
            ArchiveFile jsonFile =
                new ArchiveFile("img/$basename", bytesPhoto.length, bytesPhoto);
            zipArchive.addFile(jsonFile);
          }
        }
      } else {
        Uint8List bytesPhoto = img.readAsBytesSync() as Uint8List;
        ArchiveFile jsonFile =
            new ArchiveFile("img/$basename", bytesPhoto.length, bytesPhoto);
        zipArchive.addFile(jsonFile);
      }
    }
    List<int> zipInBytes = new ZipEncoder().encode(zipArchive);
    file.writeAsBytesSync(zipInBytes);
    var bytes = file.readAsBytesSync();
    return bytes;
  }

  uploadDataZip(Uint8List data, String fileName) async {
    String path = '/ok/img';
    String url = await uploadStorageData(path, data, fileName: fileName);
  }

  resetManualItems() {
    helps.clear();
    //clone manauals
    helps = manuals.map((p) => ManualItem.clone(p)).toList();
    // return helps.where((h) => isBuyer ? h.isBuyer : true).toList();
  }

  saveInstruction(int manIndex, int slideIndex, int instIndex,
      Instruction instruction, Instruction oldInst, bool isEng) {
    if (isEng) {
      var inst = helps[manIndex].slides[slideIndex].instructions.toList();
      instruction.id = oldInst.id;
      if (inst.length != 0) {
        helps[manIndex].slides[slideIndex].instructions.remove(oldInst);
        helps[manIndex]
            .slides[slideIndex]
            .instructions
            .insert(instIndex, instruction);
      } else {
        helps[manIndex].slides[slideIndex].instructions.add(instruction);
      }
    } else {
      var inst = helps[manIndex].slides[slideIndex].instructionsmm.toList();
      instruction.id = oldInst.id;
      if (inst.length != 0) {
        helps[manIndex].slides[slideIndex].instructionsmm.remove(oldInst);
        helps[manIndex]
            .slides[slideIndex]
            .instructionsmm
            .insert(instIndex, instruction);
      } else {
        helps[manIndex].slides[slideIndex].instructionsmm.add(instruction);
      }
    }
    notifyListeners();
  }

  saveSlideData(int manIndex, int slideIndex, SlideData slideData) {
    helps[manIndex].slides.add(slideData);
    notifyListeners();
  }

  changeSlideImage(int manIndex, int slideIndex, SlideData slideData) {
    var oldSlide = helps[manIndex].slides[slideIndex];
    helps[manIndex].slides.remove(oldSlide);
    helps[manIndex].slides.insert(slideIndex, slideData);
    notifyListeners();
  }

  deleteSlideData(int manIndex, SlideData slideData) {
    String engImage = slideData.image;
    String mmImage = slideData.imagemm;
    deleteImage.add(mmImage);
    deleteImage.add(engImage);
    helps[manIndex].slides.remove(slideData);
    notifyListeners();
  }

  deleteManualItem(ManualItem item) {
    // if(helps.isEmpty){
    //   helps = new List();
    // }
    helps.remove(item);
    notifyListeners();
  }
}