import 'dart:async';
import 'dart:io';

import 'package:flutter/foundation.dart';
import 'package:freezed_annotation/freezed_annotation.dart';
import 'package:riverpod_annotation/riverpod_annotation.dart';
import 'package:starcitizen_doctor/api/analytics.dart';
import 'package:starcitizen_doctor/common/utils/log.dart';
import 'package:starcitizen_doctor/common/utils/provider.dart';
import 'package:starcitizen_doctor/data/app_advanced_localization_data.dart';
import 'package:starcitizen_doctor/data/sc_localization_data.dart';
import 'package:starcitizen_doctor/provider/unp4kc.dart';

import '../home_ui_model.dart';
import 'advanced_localization_ui.json.dart';
import 'localization_ui_model.dart';

part 'advanced_localization_ui_model.g.dart';

part 'advanced_localization_ui_model.freezed.dart';

@freezed
class AdvancedLocalizationUIState with _$AdvancedLocalizationUIState {
  factory AdvancedLocalizationUIState({
    @Default("") String workingText,
    Map<String, AppAdvancedLocalizationClassKeysData>? classMap,
    String? p4kGlobalIni,
    String? serverGlobalIni,
    String? customizeGlobalIni,
    ScLocalizationData? apiLocalizationData,
    @Default(0) int p4kGlobalIniLines,
    @Default(0) int serverGlobalIniLines,
    @Default("") String errorMessage,
  }) = _AdvancedLocalizationUIState;
}

extension AdvancedLocalizationUIStateEx on AdvancedLocalizationUIState {
  Map<AppAdvancedLocalizationClassKeysDataMode, String> get typeNames => {
        AppAdvancedLocalizationClassKeysDataMode.localization:
            S.current.home_localization_advanced_action_mod_change_localization,
        AppAdvancedLocalizationClassKeysDataMode.unLocalization: S.current
            .home_localization_advanced_action_mod_change_un_localization,
        AppAdvancedLocalizationClassKeysDataMode.mixed:
            S.current.home_localization_advanced_action_mod_change_mixed,
        AppAdvancedLocalizationClassKeysDataMode.mixedNewline: S
            .current.home_localization_advanced_action_mod_change_mixed_newline,
      };
}

@riverpod
class AdvancedLocalizationUIModel extends _$AdvancedLocalizationUIModel {
  @override
  AdvancedLocalizationUIState build() {
    final localizationUIState = ref.read(localizationUIModelProvider);
    final localizationUIModel = ref.read(localizationUIModelProvider.notifier);
    state = AdvancedLocalizationUIState(classMap: {});
    _init(localizationUIState, localizationUIModel);
    return state;
  }

  Future<void> _init(LocalizationUIState localizationUIState,
      LocalizationUIModel localizationUIModel) async {
    final (p4kGlobalIni, serverGlobalIni) =
        await _readIni(localizationUIState, localizationUIModel);
    final ald = await _readClassJson();
    if (ald.classKeys == null) return;
    state = state.copyWith(
        workingText: S.current.home_localization_advanced_msg_classifying);
    final m = await compute(_doClassIni, (
      ald,
      p4kGlobalIni,
      serverGlobalIni,
      S.current.home_localization_advanced_json_text_un_localization,
      S.current.home_localization_advanced_json_text_others
    ));
    final p4kGlobalIniLines = p4kGlobalIni.split("\n").length;
    final serverGlobalIniLines = serverGlobalIni.split("\n").length;
    state = state.copyWith(
        workingText: "",
        p4kGlobalIni: p4kGlobalIni,
        serverGlobalIni: serverGlobalIni,
        p4kGlobalIniLines: p4kGlobalIniLines,
        serverGlobalIniLines: serverGlobalIniLines,
        classMap: m);
  }

  void setCustomizeGlobalIni(String? data) async {
    state = state.copyWith(customizeGlobalIni: data);
    final localizationUIState = ref.read(localizationUIModelProvider);
    final localizationUIModel = ref.read(localizationUIModelProvider.notifier);
    await _init(localizationUIState, localizationUIModel);
  }

  static Map<String, AppAdvancedLocalizationClassKeysData> _doClassIni(
    (
      AppAdvancedLocalizationData ald,
      String p4kGlobalIni,
      String serverGlobalIni,
      String unLocalizationClassName,
      String othersClassName,
    ) v,
  ) {
    final (
      AppAdvancedLocalizationData ald,
      String p4kGlobalIni,
      String serverGlobalIni,
      String unLocalizationClassName,
      String othersClassName,
    ) = v;
    final unLocalization = AppAdvancedLocalizationClassKeysData(
      id: "un_localization",
      className: unLocalizationClassName,
      keys: [],
    )
      ..mode = AppAdvancedLocalizationClassKeysDataMode.unLocalization
      ..lockMod = true;
    final unClass = AppAdvancedLocalizationClassKeysData(
      id: "un_class",
      className: othersClassName,
      keys: [],
    );
    final classMap = <String, AppAdvancedLocalizationClassKeysData>{
      for (final keys in ald.classKeys!) keys.id ?? "": keys,
    };

    final p4kIniMap = readIniAsMap(p4kGlobalIni);
    final serverIniMap = readIniAsMap(serverGlobalIni);

    var regexList = classMap.values
        .expand((c) =>
            c.keys!.map((k) => MapEntry(c, RegExp(k, caseSensitive: false))))
        .toList();

    iniKeysLoop:
    for (var p4kIniKey in p4kIniMap.keys) {
      final serverValue = serverIniMap[p4kIniKey];
      if (serverValue == null || serverValue.trim().isEmpty) {
        final p4kValue = p4kIniMap[p4kIniKey] ?? "";
        if (p4kValue.trim().isNotEmpty) {
          unLocalization.valuesMap[p4kIniKey] = p4kValue;
        }
        continue iniKeysLoop;
      } else {
        for (var item in regexList) {
          if (p4kIniKey.startsWith(item.value)) {
            item.key.valuesMap[p4kIniKey] = serverValue;
            serverIniMap.remove(p4kIniKey);
            continue iniKeysLoop;
          }
        }
      }
    }
    if (serverIniMap.isNotEmpty) {
      for (var element in serverIniMap.keys) {
        unClass.valuesMap[element] = serverIniMap[element] ?? "";
      }
      classMap[unClass.id!] = unClass;
    }
    if (unLocalization.valuesMap.isNotEmpty) {
      classMap[unLocalization.id!] = unLocalization;
    }
    return classMap;
  }

  static Map<String, String> readIniAsMap(String iniString) {
    final iniMap = <String, String>{};
    for (final line in iniString.split("\n")) {
      final index = line.indexOf("=");
      if (index == -1) continue;
      final key = line.substring(0, index).trim();
      final value = line.substring(index + 1).trim();
      iniMap[key] = value;
    }
    return iniMap;
  }

  Future<AppAdvancedLocalizationData> _readClassJson() async {
    return AppAdvancedLocalizationData.fromJson(advancedLocalizationJsonData);
  }

  Future<(String, String)> _readIni(LocalizationUIState localizationUIState,
      LocalizationUIModel localizationUIModel) async {
    final homeUIState = ref.read(homeUIModelProvider);
    final gameDir = homeUIState.scInstalledPath;
    if (gameDir == null) return ("", "");
    state = state.copyWith(
        workingText: S.current.home_localization_advanced_msg_reading_p4k);
    final p4kGlobalIni = await readEnglishInI(gameDir);
    dPrint("read p4kGlobalIni => ${p4kGlobalIni.length}");
    state = state.copyWith(
        workingText: S.current
            .home_localization_advanced_msg_reading_server_localization_text);

    if (state.customizeGlobalIni != null) {
      final apiLocalizationData = ScLocalizationData(
          versionName: S.current.localization_info_custom_files,
          info: "Customize");
      state = state.copyWith(apiLocalizationData: apiLocalizationData);
      return (p4kGlobalIni, state.customizeGlobalIni!);
    } else {
      final apiLocalizationData =
          localizationUIState.apiLocalizationData?.values.firstOrNull;
      if (apiLocalizationData == null) return ("", "");
      final file = File(
          "${localizationUIModel.getDownloadDir().absolute.path}\\${apiLocalizationData.versionName}.sclang");
      if (!await file.exists()) {
        await localizationUIModel.downloadLocalizationFile(
            file, apiLocalizationData);
      }
      state = state.copyWith(apiLocalizationData: apiLocalizationData);
      final serverGlobalIni =
          (await compute(LocalizationUIModel.readArchive, file.absolute.path))
              .toString();
      dPrint("read serverGlobalIni => ${serverGlobalIni.length}");
      return (p4kGlobalIni, serverGlobalIni);
    }
  }

  Future<String> readEnglishInI(String gameDir) async {
    try {
      var data = await Unp4kCModel.unp4kTools(
          appGlobalState.applicationBinaryModuleDir!, [
        "extract_memory",
        "$gameDir\\Data.p4k",
        "Data\\Localization\\english\\global.ini"
      ]);
      // remove bom
      if (data.length > 3 &&
          data[0] == 0xEF &&
          data[1] == 0xBB &&
          data[2] == 0xBF) {
        data = data.sublist(3);
      }
      final iniData = String.fromCharCodes(data);
      return iniData;
    } catch (e) {
      final errorMessage = e.toString();
      if (errorMessage
              .contains("You must install .NET to run this application") ||
          errorMessage.contains(
              "You must install or update .NET to run this application")) {
        AnalyticsApi.touch("advanced_localization_no_runtime");
      }
      state = state.copyWith(
        errorMessage: errorMessage,
      );
      // rethrow;
    }
    return "";
  }

  onChangeMod(AppAdvancedLocalizationClassKeysData item,
      AppAdvancedLocalizationClassKeysDataMode mode) async {
    if (item.lockMod) return;
    item.mode = mode;
    item.isWorking = true;
    final classMap =
        Map<String, AppAdvancedLocalizationClassKeysData>.from(state.classMap!);
    classMap[item.id!] = item;
    state = state.copyWith(classMap: classMap);

    final p4kIniMap = readIniAsMap(state.p4kGlobalIni!);
    final serverIniMap = readIniAsMap(state.serverGlobalIni!);
    final newValuesMap = <String, String>{};

    for (var kv in item.valuesMap.entries) {
      switch (mode) {
        case AppAdvancedLocalizationClassKeysDataMode.localization:
          newValuesMap[kv.key] = serverIniMap[kv.key] ?? "";
          break;
        case AppAdvancedLocalizationClassKeysDataMode.unLocalization:
          newValuesMap[kv.key] = p4kIniMap[kv.key] ?? "";
          break;
        case AppAdvancedLocalizationClassKeysDataMode.mixed:
          newValuesMap[kv.key] =
              "${serverIniMap[kv.key]} [${p4kIniMap[kv.key]}]";
          break;
        case AppAdvancedLocalizationClassKeysDataMode.mixedNewline:
          newValuesMap[kv.key] =
              "${serverIniMap[kv.key]}\\n${p4kIniMap[kv.key]}";
          break;
      }
      await Future.delayed(Duration.zero);
    }
    item.valuesMap = newValuesMap;
    item.isWorking = false;
    classMap[item.id!] = item;
    state = state.copyWith(classMap: classMap);
  }

  Future<bool> doInstall() async {
    AnalyticsApi.touch("advanced_localization_apply");
    state = state.copyWith(
        workingText:
            S.current.home_localization_advanced_msg_gen_localization_text);
    final classMap = state.classMap!;
    final globalIni = StringBuffer();
    for (var item in classMap.values) {
      for (var kv in item.valuesMap.entries) {
        globalIni.write("${kv.key}=${kv.value}\n");
        await Future.delayed(Duration.zero);
      }
    }
    state = state.copyWith(
        workingText:
            S.current.home_localization_advanced_msg_gen_localization_install);
    final localizationUIModel = ref.read(localizationUIModelProvider.notifier);
    await localizationUIModel.installFormString(
        globalIni, state.apiLocalizationData?.versionName ?? "-",
        advanced: true);
    state = state.copyWith(workingText: "");
    return true;
  }
}