import 'dart:convert';
import 'dart:io';
import 'package:device_apps/device_apps.dart';
import 'package:injectable/injectable.dart';
import 'package:package_info_plus/package_info_plus.dart';
import 'package:revanced_manager/app/app.locator.dart';
import 'package:revanced_manager/models/patch.dart';
import 'package:revanced_manager/models/patched_application.dart';
import 'package:revanced_manager/services/github_api.dart';
import 'package:revanced_manager/services/revanced_api.dart';
import 'package:revanced_manager/services/root_api.dart';
import 'package:shared_preferences/shared_preferences.dart';

@lazySingleton
class ManagerAPI {
  final RevancedAPI _revancedAPI = locator<RevancedAPI>();
  final GithubAPI _githubAPI = locator<GithubAPI>();
  final RootAPI _rootAPI = RootAPI();
  final String patcherRepo = 'revanced-patcher';
  final String cliRepo = 'revanced-cli';
  late SharedPreferences _prefs;
  String defaultApiUrl = 'https://revanced-releases-api.afterst0rm.xyz';
  String defaultPatcherRepo = 'revanced/revanced-patcher';
  String defaultPatchesRepo = 'revanced/revanced-patches';
  String defaultIntegrationsRepo = 'revanced/revanced-integrations';
  String defaultCliRepo = 'revanced/revanced-cli';
  String defaultManagerRepo = 'revanced/revanced-manager';

  Future<void> initialize() async {
    _prefs = await SharedPreferences.getInstance();
  }

  String getApiUrl() {
    return _prefs.getString('apiUrl') ?? defaultApiUrl;
  }

  Future<void> setApiUrl(String url) async {
    if (url.isEmpty || url == ' ') {
      url = defaultApiUrl;
    }
    await _revancedAPI.initialize(url);
    await _revancedAPI.clearAllCache();
    await _prefs.setString('apiUrl', url);
  }

  String getPatchesRepo() {
    return _prefs.getString('patchesRepo') ?? defaultPatchesRepo;
  }

  Future<void> setPatchesRepo(String value) async {
    if (value.isEmpty || value.startsWith('/') || value.endsWith('/')) {
      value = defaultPatchesRepo;
    }
    await _prefs.setString('patchesRepo', value);
  }

  String getIntegrationsRepo() {
    return _prefs.getString('integrationsRepo') ?? defaultIntegrationsRepo;
  }

  Future<void> setIntegrationsRepo(String value) async {
    if (value.isEmpty || value.startsWith('/') || value.endsWith('/')) {
      value = defaultIntegrationsRepo;
    }
    await _prefs.setString('integrationsRepo', value);
  }

  bool getUseDynamicTheme() {
    return _prefs.getBool('useDynamicTheme') ?? false;
  }

  Future<void> setUseDynamicTheme(bool value) async {
    await _prefs.setBool('useDynamicTheme', value);
  }

  bool getUseDarkTheme() {
    return _prefs.getBool('useDarkTheme') ?? false;
  }

  Future<void> setUseDarkTheme(bool value) async {
    await _prefs.setBool('useDarkTheme', value);
  }

  List<PatchedApplication> getPatchedApps() {
    List<String> apps = _prefs.getStringList('patchedApps') ?? [];
    return apps.map((a) => PatchedApplication.fromJson(jsonDecode(a))).toList();
  }

  Future<void> setPatchedApps(List<PatchedApplication> patchedApps) async {
    if (patchedApps.length > 1) {
      patchedApps.sort((a, b) => a.name.compareTo(b.name));
    }
    await _prefs.setStringList('patchedApps',
        patchedApps.map((a) => json.encode(a.toJson())).toList());
  }

  Future<void> savePatchedApp(PatchedApplication app) async {
    List<PatchedApplication> patchedApps = getPatchedApps();
    patchedApps.removeWhere((a) => a.packageName == app.packageName);
    ApplicationWithIcon? installed = await DeviceApps.getApp(
      app.packageName,
      true,
    ) as ApplicationWithIcon?;
    if (installed != null) {
      app.name = installed.appName;
      app.version = installed.versionName!;
      app.icon = installed.icon;
    }
    patchedApps.add(app);
    await setPatchedApps(patchedApps);
  }

  Future<void> deletePatchedApp(PatchedApplication app) async {
    List<PatchedApplication> patchedApps = getPatchedApps();
    patchedApps.removeWhere((a) => a.packageName == app.packageName);
    await setPatchedApps(patchedApps);
  }

  void clearAllData() {
    _revancedAPI.clearAllCache();
    _githubAPI.clearAllCache();
  }

  Future<Map<String, List<dynamic>>> getContributors() async {
    return await _revancedAPI.getContributors();
  }

  Future<List<Patch>> getPatches() async {
    String repoName = getPatchesRepo();
    if (repoName == defaultPatchesRepo) {
      return await _revancedAPI.getPatches();
    } else {
      return await _githubAPI.getPatches(repoName);
    }
  }

  Future<File?> downloadPatches() async {
    String repoName = getPatchesRepo();
    if (repoName == defaultPatchesRepo) {
      return await _revancedAPI.getLatestReleaseFile(
        '.jar',
        defaultPatchesRepo,
      );
    } else {
      return await _githubAPI.getLatestReleaseFile('.jar', repoName);
    }
  }

  Future<File?> downloadIntegrations() async {
    String repoName = getIntegrationsRepo();
    if (repoName == defaultIntegrationsRepo) {
      return await _revancedAPI.getLatestReleaseFile(
        '.apk',
        defaultIntegrationsRepo,
      );
    } else {
      return await _githubAPI.getLatestReleaseFile('.apk', repoName);
    }
  }

  Future<File?> downloadManager() async {
    return await _revancedAPI.getLatestReleaseFile('.apk', defaultManagerRepo);
  }

  Future<String?> getLatestPatcherReleaseTime() async {
    return await _revancedAPI.getLatestReleaseTime('.gz', defaultPatcherRepo);
  }

  Future<String?> getLatestManagerReleaseTime() async {
    return await _revancedAPI.getLatestReleaseTime('.apk', defaultManagerRepo);
  }

  Future<String?> getLatestManagerVersion() async {
    return await _revancedAPI.getLatestReleaseVersion(
      '.apk',
      defaultManagerRepo,
    );
  }

  Future<String> getCurrentManagerVersion() async {
    PackageInfo packageInfo = await PackageInfo.fromPlatform();
    return packageInfo.version;
  }

  Future<List<PatchedApplication>> getAppsToRemove(
    List<PatchedApplication> patchedApps,
  ) async {
    List<PatchedApplication> toRemove = [];
    for (PatchedApplication app in patchedApps) {
      bool isRemove = await isAppUninstalled(app);
      if (isRemove) {
        toRemove.add(app);
      }
    }
    return toRemove;
  }

  Future<List<PatchedApplication>> getUnsavedApps(
    List<PatchedApplication> patchedApps,
  ) async {
    List<PatchedApplication> unsavedApps = [];
    bool hasRootPermissions = await _rootAPI.hasRootPermissions();
    if (hasRootPermissions) {
      List<String> installedApps = await _rootAPI.getInstalledApps();
      for (String packageName in installedApps) {
        if (!patchedApps.any((app) => app.packageName == packageName)) {
          ApplicationWithIcon? application = await DeviceApps.getApp(
            packageName,
            true,
          ) as ApplicationWithIcon?;
          if (application != null) {
            unsavedApps.add(
              PatchedApplication(
                name: application.appName,
                packageName: application.packageName,
                version: application.versionName!,
                apkFilePath: application.apkFilePath,
                icon: application.icon,
                patchDate: DateTime.now(),
                isRooted: true,
              ),
            );
          }
        }
      }
    }
    List<Application> userApps = await DeviceApps.getInstalledApplications(
      includeSystemApps: false,
      includeAppIcons: false,
    );
    for (Application app in userApps) {
      if (app.packageName.startsWith('app.revanced') &&
          !app.packageName.startsWith('app.revanced.manager.') &&
          !patchedApps.any((uapp) => uapp.packageName == app.packageName)) {
        ApplicationWithIcon? application = await DeviceApps.getApp(
          app.packageName,
          true,
        ) as ApplicationWithIcon?;
        if (application != null) {
          unsavedApps.add(
            PatchedApplication(
              name: application.appName,
              packageName: application.packageName,
              version: application.versionName!,
              apkFilePath: application.apkFilePath,
              icon: application.icon,
              patchDate: DateTime.now(),
              isRooted: false,
            ),
          );
        }
      }
    }
    return unsavedApps;
  }

  Future<void> reAssessSavedApps() async {
    List<PatchedApplication> patchedApps = getPatchedApps();
    List<PatchedApplication> unsavedApps = await getUnsavedApps(patchedApps);
    patchedApps.addAll(unsavedApps);
    List<PatchedApplication> toRemove = await getAppsToRemove(patchedApps);
    patchedApps.removeWhere((a) => toRemove.contains(a));
    for (PatchedApplication app in patchedApps) {
      app.hasUpdates = await hasAppUpdates(app.packageName, app.patchDate);
      app.changelog = await getAppChangelog(app.packageName, app.patchDate);
      if (!app.hasUpdates) {
        String? currentInstalledVersion =
            (await DeviceApps.getApp(app.packageName))?.versionName;
        if (currentInstalledVersion != null) {
          String currentSavedVersion = app.version;
          int currentInstalledVersionInt = int.parse(
              currentInstalledVersion.replaceAll(RegExp('[^0-9]'), ''));
          int currentSavedVersionInt =
              int.parse(currentSavedVersion.replaceAll(RegExp('[^0-9]'), ''));
          if (currentInstalledVersionInt > currentSavedVersionInt) {
            app.hasUpdates = true;
          }
        }
      }
    }
    await setPatchedApps(patchedApps);
  }

  Future<bool> isAppUninstalled(PatchedApplication app) async {
    bool existsRoot = false;
    bool existsNonRoot = await DeviceApps.isAppInstalled(app.packageName);
    if (app.isRooted) {
      bool hasRootPermissions = await _rootAPI.hasRootPermissions();
      if (hasRootPermissions) {
        existsRoot = await _rootAPI.isAppInstalled(app.packageName);
      }
      return !existsRoot || !existsNonRoot;
    }
    return !existsNonRoot;
  }

  Future<bool> hasAppUpdates(String packageName, DateTime patchDate) async {
    List<String> commits = await _githubAPI.getCommits(
      packageName,
      getPatchesRepo(),
      patchDate,
    );
    return commits.isNotEmpty;
  }

  Future<List<String>> getAppChangelog(
      String packageName, DateTime patchDate) async {
    List<String> newCommits = await _githubAPI.getCommits(
      packageName,
      getPatchesRepo(),
      patchDate,
    );
    if (newCommits.isEmpty) {
      newCommits = await _githubAPI.getCommits(
        packageName,
        getPatchesRepo(),
        DateTime(2022, 3, 20, 21, 06, 01),
      );
    }
    return newCommits;
  }
}