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

import 'package:halkyon_learn_flutter/src/core/asset/data/asset_file_cache.dart';
import 'package:halkyon_learn_flutter/src/core/asset/data/asset_gateway.dart';
import 'package:halkyon_learn_flutter/src/core/asset/data/asset_repository.dart';
import 'package:halkyon_learn_flutter/src/core/asset/data/asset_server_gateway.dart';
import 'package:halkyon_learn_flutter/src/core/asset/data/sound_player.dart';
import 'package:halkyon_learn_flutter/src/core/dependencies/dependencies.dart';
import 'package:halkyon_learn_flutter/src/core/dependencies/person_dependencies.dart';
import 'package:halkyon_learn_flutter/src/core/device_settings/data/device_settings_store.dart';
import 'package:halkyon_learn_flutter/src/core/device_settings/model/device_settings.dart';
import 'package:halkyon_learn_flutter/src/core/files/file_picker.dart';
import 'package:halkyon_learn_flutter/src/core/files/file_saver.dart';
import 'package:halkyon_learn_flutter/src/core/sync/pending_changes_store.dart';
import 'package:halkyon_learn_flutter/src/core/sync/sync_service.dart';
import 'package:halkyon_learn_flutter/src/core/version/app_version.dart';
import 'package:halkyon_learn_flutter/src/core/video/media_players.dart';
import 'package:halkyon_learn_flutter/src/core/video/youtube_videos.dart';
import 'package:halkyon_learn_flutter/src/feature/about/data/about_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/about/data/about_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/anki/data/anki_package.dart';
import 'package:halkyon_learn_flutter/src/feature/anki/data/anki_package_reader.dart';
import 'package:halkyon_learn_flutter/src/feature/archive/data/archive_reader.dart';
import 'package:halkyon_learn_flutter/src/feature/archive/model/import_archive.dart';
import 'package:halkyon_learn_flutter/src/feature/assistant/data/assistant_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/assistant/data/assistant_hand_off.dart';
import 'package:halkyon_learn_flutter/src/feature/assistant/data/assistant_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/assistant/data/web_search.dart';
import 'package:halkyon_learn_flutter/src/feature/auth/data/auth_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/auth/data/auth_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/auth/data/sign_in_addresses.dart';
import 'package:halkyon_learn_flutter/src/feature/auth/data/signed_out_mark.dart';
import 'package:halkyon_learn_flutter/src/feature/card/data/card_deletions.dart';
import 'package:halkyon_learn_flutter/src/feature/card/data/card_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/card/data/card_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/dictionary/data/device_dictionaries.dart';
import 'package:halkyon_learn_flutter/src/feature/dictionary/data/dictionary_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/dictionary/data/dictionary_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/discussion/data/discussion_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/discussion/data/discussion_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/explore/data/copy_updater.dart';
import 'package:halkyon_learn_flutter/src/feature/explore/data/explore_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/explore/data/explore_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/explore/data/release_copier.dart';
import 'package:halkyon_learn_flutter/src/feature/export/data/export_archive.dart';
import 'package:halkyon_learn_flutter/src/feature/export/data/studyset_markdown.dart';
import 'package:halkyon_learn_flutter/src/feature/feedback/data/feedback_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/feedback/data/feedback_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/geo_map/data/geo_map_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/jellyfin/data/jellyfin_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/jellyfin/data/jellyfin_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/jellyfin/data/jellyfin_store.dart';
import 'package:halkyon_learn_flutter/src/feature/jellyfin/data/jellyfin_suggestion.dart';
import 'package:halkyon_learn_flutter/src/feature/kanji/data/stroke_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/learning_path/data/learning_path_deletions.dart';
import 'package:halkyon_learn_flutter/src/feature/learning_path/data/learning_path_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/learning_path/data/learning_path_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/learning_path/data/path_answer_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/learning_path/data/path_progress_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/note/data/note_deletions.dart';
import 'package:halkyon_learn_flutter/src/feature/note/data/note_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/note/data/note_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/pdf_source/data/pdf_deletions.dart';
import 'package:halkyon_learn_flutter/src/feature/pdf_source/data/pdf_engine.dart';
import 'package:halkyon_learn_flutter/src/feature/pdf_source/data/pdf_source_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/pdf_source/data/pdf_source_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/pomodoro/data/pomodoro_platform.dart';
import 'package:halkyon_learn_flutter/src/feature/pomodoro/data/pomodoro_run_store.dart';
import 'package:halkyon_learn_flutter/src/feature/profile/data/profile_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/profile/data/profile_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/publish/data/publish_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/publish/data/publish_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/publish/data/published_store.dart';
import 'package:halkyon_learn_flutter/src/feature/settings/data/settings_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/settings/data/settings_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/study/data/review_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/study/data/review_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/studyset/data/studyset_deletions.dart';
import 'package:halkyon_learn_flutter/src/feature/studyset/data/studyset_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/studyset/data/studyset_progress_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/studyset/data/studyset_repository.dart';
import 'package:halkyon_learn_flutter/src/feature/studyset/data/studyset_tabs.dart';
import 'package:halkyon_learn_flutter/src/feature/tag/data/tag_gateway.dart';
import 'package:halkyon_learn_flutter/src/feature/tag/data/tag_repository.dart';

import 'fake_about_gateway.dart';
import 'fake_asset_gateway.dart';
import 'fake_asset_server_gateway.dart';
import 'fake_assistant_gateway.dart';
import 'fake_auth_gateway.dart';
import 'fake_card_gateway.dart';
import 'fake_device_dictionaries.dart';
import 'fake_dictionary_gateway.dart';
import 'fake_discussion_gateway.dart';
import 'fake_explore_gateway.dart';
import 'fake_feedback_gateways.dart';
import 'fake_file_picker.dart';
import 'fake_file_saver.dart';
import 'fake_jellyfin.dart';
import 'fake_learning_path_gateway.dart';
import 'fake_note_gateway.dart';
import 'fake_path_answer_gateway.dart';
import 'fake_pdf_engine.dart';
import 'fake_pdf_source_gateway.dart';
import 'fake_pomodoro_platform.dart';
import 'fake_profile_gateway.dart';
import 'fake_publish_gateway.dart';
import 'fake_review_gateway.dart';
import 'fake_settings_gateway.dart';
import 'fake_sound_player.dart';
import 'fake_studyset_gateway.dart';
import 'fake_tag_gateway.dart';
import 'fake_youtube_videos.dart';
import 'memory_asset_file_cache.dart';
import 'memory_device_settings_store.dart';
import 'memory_pomodoro_run_store.dart';
import 'memory_published_store.dart';
import 'memory_sign_in_addresses.dart';
import 'memory_signed_out_mark.dart';
import 'memory_studyset_tab_store.dart';

/// The app's dependencies with fakes instead of the server and the device's
/// database; each test passes in only the fakes it looks at.
///
/// Every person gets [studysetGateway], [cardGateway], [noteGateway],
/// [pathGateway], [answerGateway], [tagGateway], [settingsGateway] and the
/// asset fakes (or fresh fakes of their own),
/// unless [openPerson] replaces how a person's dependencies are opened.
///
/// The device starts with [deviceSettings], kept in memory unless a test
/// passes the [deviceSettingsStore] to look at.
///
/// A person's sync runs [syncOnce] (by default, going through without doing
/// anything): once when their data opens if a test passes it, and whenever
/// the person asks; never on timers, which a widget test would find pending.
Dependencies testDependencies({
  AuthGateway? authGateway,
  SignedOutMark? signedOut,
  SignInAddresses? signInAddresses,
  StudysetGateway? studysetGateway,
  CardGateway? cardGateway,
  NoteGateway? noteGateway,
  LearningPathGateway? pathGateway,
  PathAnswerGateway? answerGateway,
  PdfSourceGateway? pdfGateway,
  ReviewGateway? reviewGateway,
  TagGateway? tagGateway,
  GeoMapRepository? maps,
  StrokeRepository? strokes,
  SoundPlayer? sounds,
  FilePicker? files,
  FileSaver? fileSaver,
  YoutubeVideos? videos,
  PdfEngine? pdfEngine,
  SettingsGateway? settingsGateway,
  AssetGateway? assetGateway,
  AssetServerGateway? assetServer,
  AssetFileCache? assetFiles,
  AboutGateway? aboutGateway,
  DictionaryGateway? dictionaryGateway,
  DeviceDictionaries? deviceDictionaries,
  DeviceSettingsStore? deviceSettingsStore,
  DeviceSettings deviceSettings = const DeviceSettings(),
  AppVersion appVersion = const AppVersion(version: '1.0.0', build: '1'),
  PomodoroPlatform? pomodoro,
  PomodoroRunStore? pomodoroRuns,
  ProfileGateway? profileGateway,
  PublishGateway? publishGateway,
  PublishedStore? publishedStore,
  StudysetTabStore? studysetTabStore,
  ExploreGateway? exploreGateway,
  FeedbackWriteGateway? feedbackWriteGateway,
  FeedbackServerGateway? feedbackServerGateway,
  DiscussionGateway? discussionGateway,
  SyncOnce? syncOnce,
  PendingChangesStore? pendingChanges,
  // A device that synced before, as most are; false for one whose first
  // sync is still to go through.
  bool syncedBefore = true,
  OpenPerson? openPerson,
  AssistantHandOff? assistantHandOff,
  WebSearch? webSearch,
  AssistantGateway? assistantGateway,
  JellyfinGateway? jellyfinGateway,
  JellyfinStore? jellyfinStore,
  JellyfinSuggestion? jellyfinSuggestion,
  MediaPlayers? mediaPlayers,
}) {
  final device = deviceDictionaries ?? noDeviceDictionaries();
  return Dependencies(
    serverName: 'learn.example.org',
    auth: AuthRepository(
      authGateway ?? FakeAuthGateway(),
      signInAddresses ?? MemorySignInAddresses(),
    ),
    signedOut: signedOut ?? MemorySignedOutMark(),
    about: AboutRepository(aboutGateway ?? FakeAboutGateway()),
    dictionaries: DictionaryRepository(
      dictionaryGateway ?? FakeDictionaryGateway(),
      device,
    ),
    deviceDictionaries: device,
    maps: maps ?? GeoMapRepository(),
    strokes: strokes ?? StrokeRepository(),
    sounds: sounds ?? FakeSoundPlayer(),
    files: files ?? FakeFilePicker(),
    fileSaver: fileSaver ?? FakeFileSaver(),
    videos: videos ?? FakeYoutubeVideos(),
    pdfEngine: pdfEngine ?? FakePdfEngine(),
    ankiPackages: InlineAnkiPackageReader(),
    archives: InlineArchiveReader(),
    exportArchiver: InlineExportArchiver(),
    deviceSettingsStore:
        deviceSettingsStore ?? MemoryDeviceSettingsStore(deviceSettings),
    deviceSettings: deviceSettings,
    appVersion: appVersion,
    pomodoro: pomodoro ?? FakePomodoroPlatform(),
    assistantHandOff:
        assistantHandOff ?? AssistantHandOff(open: (url) async => true),
    webSearch:
        webSearch ??
        WebSearch(
          open: (url) async => true,
          deviceSearch: (query) async => false,
        ),
    assistant: AssistantRepository(assistantGateway ?? FakeAssistantGateway()),
    jellyfin: JellyfinRepository(
      (device) => jellyfinGateway ?? FakeJellyfinGateway(),
      jellyfinStore ?? MemoryJellyfinStore(),
      deviceName: 'Test',
      appVersion: appVersion.version,
    ),
    jellyfinSuggestion:
        jellyfinSuggestion ?? JellyfinSuggestion(() async => null),
    mediaPlayers: mediaPlayers ?? FakeMediaPlayers(),
    openPerson:
        openPerson ??
        (person) async {
          final sync = SyncService(
            syncOnce ?? ({required onMerge}) async {},
            pendingChanges: pendingChanges,
            syncedBefore: syncedBefore,
          );
          if (syncOnce != null) {
            sync.syncNow();
          }
          final studysets = StudysetRepository(
            studysetGateway ?? FakeStudysetGateway(),
          );
          final cards = CardRepository(cardGateway ?? FakeCardGateway());
          final notes = NoteRepository(noteGateway ?? FakeNoteGateway());
          final paths = LearningPathRepository(
            pathGateway ?? FakeLearningPathGateway(),
          );
          final pathProgress = PathProgressRepository(
            answerGateway ?? FakePathAnswerGateway(),
          );
          final tags = TagRepository(
            tagGateway ?? FakeTagGateway(),
            cardChanges: cards.changes,
            noteChanges: notes.changes,
            pathChanges: paths.changes,
          );
          final settings = SettingsRepository(
            settingsGateway ?? FakeSettingsGateway(),
          );
          final reviews = ReviewRepository(
            reviewGateway ?? FakeReviewGateway(),
          );
          final assets = AssetRepository(
            assetGateway ?? FakeAssetGateway(),
            assetServer ?? FakeAssetServerGateway(),
            assetFiles ?? MemoryAssetFileCache(),
          );
          final pdfSources = PdfSourceRepository(
            pdfGateway ?? FakePdfSourceGateway(),
            assets,
          );
          final deletions = StudysetDeletions(
            studysets,
            cards,
            notes,
            paths,
            pdfSources,
          );
          final studysetProgress = StudysetProgressRepository(
            studysets: studysets,
            cards: cards,
            notes: notes,
            paths: paths,
            pdfs: pdfSources,
            reviews: reviews,
            settings: settings,
          );
          final noteDeletions = NoteDeletions(notes);
          final cardDeletions = CardDeletions(cards);
          final pathDeletions = LearningPathDeletions(paths);
          final stepDeletions = StepDeletions(paths);
          final pdfDeletions = PdfDeletions(pdfSources);
          final studysetTabs = StudysetTabs(
            studysetTabStore ?? MemoryStudysetTabStore(),
          );
          await studysetTabs.open();
          return PersonDependencies(
            sync: sync,
            studysets: studysets,
            cards: cards,
            notes: notes,
            paths: paths,
            pathProgress: pathProgress,
            pdfSources: pdfSources,
            reviews: reviews,
            studysetProgress: studysetProgress,
            tags: tags,
            settings: settings,
            assets: assets,
            deletions: deletions,
            noteDeletions: noteDeletions,
            cardDeletions: cardDeletions,
            pathDeletions: pathDeletions,
            stepDeletions: stepDeletions,
            pdfDeletions: pdfDeletions,
            pomodoroRuns: pomodoroRuns ?? MemoryPomodoroRunStore(),
            studysetTabs: studysetTabs,
            // The picture as it is: drawing it anew is real work a widget
            // test's fake clock can't wait for (avatar_image_test.dart has it).
            profile: ProfileRepository(
              profileGateway ?? FakeProfileGateway(),
              drawAvatar: (picture) async => picture,
            ),
            publishing: PublishRepository(
              publishGateway ?? FakePublishGateway(),
              publishedStore ?? MemoryPublishedStore(),
            ),
            explore: ExploreRepository(
              exploreGateway ?? FakeExploreGateway(),
              ReleaseCopier(
                studysets,
                cards,
                notes,
                paths,
                pdfSources,
                tags,
                assets,
              ),
              CopyUpdater(
                studysets,
                cards,
                notes,
                paths,
                pdfSources,
                tags,
                assets,
              ),
              studysets,
            ),
            feedback: FeedbackRepository(
              feedbackWriteGateway ?? FakeFeedbackWriteGateway(),
              feedbackServerGateway ?? FakeFeedbackServerGateway(),
              cards,
              notes,
              paths,
              assets,
            ),
            discussions: DiscussionRepository(
              discussionGateway ?? FakeDiscussionGateway(),
            ),
            onDispose: () async {
              await deletions.dispose();
              await noteDeletions.dispose();
              await cardDeletions.dispose();
              await pathDeletions.dispose();
              await stepDeletions.dispose();
              await pdfDeletions.dispose();
              await studysetProgress.dispose();
              await studysets.dispose();
              await tags.dispose();
              await settings.dispose();
              await reviews.dispose();
              await cards.dispose();
              await notes.dispose();
              await paths.dispose();
              await pathProgress.dispose();
              await pdfSources.dispose();
              await assets.dispose();
              await sync.dispose();
            },
          );
        },
  );
}

/// Reads Anki packages where it is asked to: a widget test's fake clock
/// can't wait for another isolate.
class InlineAnkiPackageReader() implements AnkiPackageReader {
  @override
  Future<AnkiPackage> read(Uint8List bytes) async =>
      readAnkiPackage(bytes, temp: Directory.systemTemp);
}

/// Reads archives where it is asked to, as [InlineAnkiPackageReader] reads.
class InlineArchiveReader() implements ArchiveReader {
  @override
  Future<ImportArchive> read(Uint8List bytes) async => readArchive(bytes);
}

/// Packs exports where it is asked to, as [InlineAnkiPackageReader] reads.
class InlineExportArchiver() implements ExportArchiver {
  @override
  Future<Uint8List> zip(List<ExportFile> files) async => zipExport(files);
}