import '../domain/domain.dart';

abstract interface class Clock {
  DateTime now();
}

final class SystemClock implements Clock {
  const SystemClock();

  @override
  DateTime now() => DateTime.now().toUtc();
}

abstract interface class IdGenerator {
  String newId();
}

final class StarterContent {
  const StarterContent({
    required this.exercises,
    required this.program,
    required this.workoutTemplate,
  });

  final List<Exercise> exercises;
  final Program program;
  final WorkoutTemplate workoutTemplate;
}

abstract interface class StarterSeedStateRepository {
  Future<int> readAppliedStarterSeedVersion();
  Future<void> writeAppliedStarterSeedVersion(int version, DateTime appliedAt);
}

abstract interface class StarterContentRepository {
  Future<bool> isLocalContentEmpty();
  Future<void> insertStarterContent(StarterContent content);
}

enum RemoteAuthFailure {
  invalidCredentials,
  emailAlreadyUsed,
  network,
  unknown,
}

final class RemoteAuthException implements Exception {
  const RemoteAuthException(this.failure, [this.message]);

  final RemoteAuthFailure failure;
  final String? message;

  @override
  String toString() => message ?? failure.name;
}

final class RemoteAuthResult {
  const RemoteAuthResult({
    required this.userId,
    required this.email,
    required this.token,
    required this.expiresAt,
  });

  final String userId;
  final String email;
  final String token;
  final DateTime expiresAt;
}

abstract interface class AuthTokenStore {
  Future<void> saveToken(String token, DateTime expiresAt);
  Future<String?> readToken();
  Future<void> clearToken();
}

abstract interface class OnlineAccountRepository {
  Future<UserAccountSession?> currentSession();
  Future<void> saveSession(UserAccountSession session);
  Future<void> clearSession();
}

abstract interface class RemoteAuthApi {
  Future<RemoteAuthResult> register({
    required String email,
    required String password,
    String? displayName,
  });

  Future<RemoteAuthResult> login({
    required String email,
    required String password,
  });

  Future<void> logout(String token);
}

enum SyncResourceType {
  exercise,
  program,
  workoutTemplate,
  workoutHistory,
  mediaAsset,
}

enum RemoteSyncPushStatus { accepted, ignoredOlder, error }

enum OnlineSyncStatus { idle, syncing, success, failure }

final class RemoteSyncPushItem {
  const RemoteSyncPushItem({
    required this.resourceType,
    required this.clientId,
    required this.schemaVersion,
    required this.clientUpdatedAt,
    required this.deletedAt,
    required this.payload,
  });

  final SyncResourceType resourceType;
  final String clientId;
  final int schemaVersion;
  final DateTime clientUpdatedAt;
  final DateTime? deletedAt;
  final Map<String, Object?> payload;
}

final class RemoteSyncPushItemResult {
  const RemoteSyncPushItemResult({
    required this.resourceType,
    required this.clientId,
    this.serverId,
    required this.status,
    this.serverUpdatedAt,
    this.errorMessage,
  });

  final SyncResourceType resourceType;
  final String clientId;
  final String? serverId;
  final RemoteSyncPushStatus status;
  final DateTime? serverUpdatedAt;
  final String? errorMessage;
}

final class RemoteSyncPushResult {
  const RemoteSyncPushResult({
    required this.serverCursor,
    required this.results,
  });

  final String? serverCursor;
  final List<RemoteSyncPushItemResult> results;
}

final class RemoteSyncedItem {
  const RemoteSyncedItem({
    required this.resourceType,
    required this.clientId,
    required this.serverId,
    required this.schemaVersion,
    required this.clientUpdatedAt,
    required this.serverUpdatedAt,
    required this.deletedAt,
    required this.payload,
  });

  final SyncResourceType resourceType;
  final String clientId;
  final String serverId;
  final int schemaVersion;
  final DateTime clientUpdatedAt;
  final DateTime serverUpdatedAt;
  final DateTime? deletedAt;
  final Map<String, Object?> payload;
}

final class RemoteSyncPullResult {
  const RemoteSyncPullResult({required this.serverCursor, required this.items});

  final String? serverCursor;
  final List<RemoteSyncedItem> items;
}

abstract interface class RemoteSyncApi {
  Future<RemoteSyncPushResult> push({
    required String deviceId,
    required List<RemoteSyncPushItem> items,
    required String token,
  });

  Future<RemoteSyncPullResult> pull({
    required String? since,
    required String token,
  });
}

final class SyncMetadataSnapshot {
  const SyncMetadataSnapshot({
    this.serverCursor,
    this.lastSuccessfulSyncAt,
    this.lastAttemptAt,
    this.lastFailureAt,
    this.status = OnlineSyncStatus.idle,
    this.pendingPushCount,
  });

  final String? serverCursor;
  final DateTime? lastSuccessfulSyncAt;
  final DateTime? lastAttemptAt;
  final DateTime? lastFailureAt;
  final OnlineSyncStatus status;
  final int? pendingPushCount;

  SyncMetadataSnapshot copyWith({
    Object? serverCursor = _portsUnchanged,
    Object? lastSuccessfulSyncAt = _portsUnchanged,
    Object? lastAttemptAt = _portsUnchanged,
    Object? lastFailureAt = _portsUnchanged,
    OnlineSyncStatus? status,
    Object? pendingPushCount = _portsUnchanged,
  }) {
    return SyncMetadataSnapshot(
      serverCursor: serverCursor == _portsUnchanged
          ? this.serverCursor
          : serverCursor as String?,
      lastSuccessfulSyncAt: lastSuccessfulSyncAt == _portsUnchanged
          ? this.lastSuccessfulSyncAt
          : lastSuccessfulSyncAt as DateTime?,
      lastAttemptAt: lastAttemptAt == _portsUnchanged
          ? this.lastAttemptAt
          : lastAttemptAt as DateTime?,
      lastFailureAt: lastFailureAt == _portsUnchanged
          ? this.lastFailureAt
          : lastFailureAt as DateTime?,
      status: status ?? this.status,
      pendingPushCount: pendingPushCount == _portsUnchanged
          ? this.pendingPushCount
          : pendingPushCount as int?,
    );
  }
}

final class RemoteResourceMapping {
  const RemoteResourceMapping({
    required this.resourceType,
    required this.clientId,
    required this.serverId,
    required this.serverUpdatedAt,
  });

  final SyncResourceType resourceType;
  final String clientId;
  final String serverId;
  final DateTime serverUpdatedAt;
}

final class PendingSyncChange {
  const PendingSyncChange({required this.changeLogIds, required this.item});

  final List<String> changeLogIds;
  final RemoteSyncPushItem item;
}

abstract interface class SyncMetadataRepository {
  Future<SyncMetadataSnapshot> read();
  Future<void> save(SyncMetadataSnapshot metadata);
}

abstract interface class RemoteResourceMappingRepository {
  Future<RemoteResourceMapping?> find({
    required SyncResourceType resourceType,
    required String clientId,
  });
  Future<void> save(RemoteResourceMapping mapping);
}

abstract interface class LocalSyncChangeRepository {
  Future<List<PendingSyncChange>> listPendingChanges();
  Future<void> markChangesSynced(List<String> changeLogIds, DateTime syncedAt);
  Future<bool> applyRemoteItem(RemoteSyncedItem item);
}

final class RemoteShareSendResult {
  const RemoteShareSendResult({
    required this.shareId,
    required this.recipientUserIds,
    required this.unresolvedEmails,
  });

  final String shareId;
  final List<String> recipientUserIds;
  final List<String> unresolvedEmails;
}

enum ShareSendStatus { sent, notConnected, queued }

final class ShareSendResult {
  const ShareSendResult({
    required this.status,
    this.shareId,
    this.recipientUserIds = const [],
    this.unresolvedEmails = const [],
    this.pendingActionId,
  });

  final ShareSendStatus status;
  final String? shareId;
  final List<String> recipientUserIds;
  final List<String> unresolvedEmails;
  final String? pendingActionId;
}

abstract interface class RemoteShareApi {
  Future<RemoteShareSendResult> sendShare({
    required ShareResourceType resourceType,
    required Map<String, Object?> payload,
    required List<String> recipientEmails,
    required String token,
  });

  Future<List<ShareInboxItem>> fetchInbox(String token);
  Future<RemoteSyncedItem> acceptShare(String shareId, String token);
  Future<void> declineShare(String shareId, String token);
  Future<void> revokeShare(String shareId, String token);
}

abstract interface class ShareInboxRepository {
  Future<List<ShareInboxItem>> listAll();
  Future<ShareInboxItem?> findByShareId(String shareId);
  Future<void> upsert(ShareInboxItem item);
  Future<void> upsertAll(List<ShareInboxItem> items);
  Future<void> markStatus(
    String shareId,
    ShareInboxStatus status,
    DateTime respondedAt,
  );
}

abstract interface class PendingShareActionRepository {
  Future<List<PendingShareAction>> listPending();
  Future<void> add(PendingShareAction action);
  Future<void> markSucceeded(String id, DateTime attemptedAt);
  Future<void> markFailed(String id, DateTime attemptedAt);
}

const Object _portsUnchanged = Object();

abstract interface class ExerciseRepository {
  Future<Exercise?> findById(String id);
  Future<List<Exercise>> listActive();
  Future<bool> isReferencedByProgram(String id);
  Future<void> save(Exercise exercise);
}

final class StoredMediaFile {
  const StoredMediaFile({
    required this.localUri,
    required this.mimeType,
    required this.sizeBytes,
    this.width,
    this.height,
    this.durationMs,
  });

  final String localUri;
  final String? mimeType;
  final int sizeBytes;
  final int? width;
  final int? height;
  final int? durationMs;
}

abstract interface class LocalMediaStorage {
  Future<StoredMediaFile> importFile({
    required String sourcePath,
    required MediaKind kind,
    required String stableFileName,
  });

  Future<Set<String>> listManagedLocalUris();
  Future<void> deleteByLocalUri(String localUri);
}

abstract interface class MediaAssetRepository {
  Future<MediaAsset?> findById(String id);
  Future<List<MediaAsset>> listActive();
  Future<void> save(MediaAsset mediaAsset);
}

abstract interface class ProgramRepository {
  Future<Program?> findById(String id);
  Future<List<Program>> listActive();
  Future<void> save(Program program);
  Future<void> saveExercise(ProgramExercise exercise);
  Future<void> replaceExercises(Program program, DateTime deletedAt);
}

abstract interface class WorkoutTemplateRepository {
  Future<WorkoutTemplate?> findById(String id);
  Future<List<WorkoutTemplate>> listActive();
  Future<void> save(WorkoutTemplate template);
  Future<void> saveProgram(WorkoutTemplateProgram program);
  Future<void> saveOverride(WorkoutTemplateExerciseOverride override);
  Future<void> replaceComposition(WorkoutTemplate template, DateTime deletedAt);
}

abstract interface class ActiveSessionRepository {
  Future<ActiveWorkoutSession?> findById(String id);
  Future<ActiveWorkoutSession?> findOpen();
  Future<void> save(ActiveWorkoutSession session);
  Future<void> saveSetResult(ActiveSetResult result);
  Future<void> saveSetTimerState(ActiveSetTimerState state);
  Future<void> saveRestState(ActiveRestState restState);
  Future<void> saveScoreStopwatchState(ActiveScoreStopwatchState state);
  Future<void> saveExerciseStepProgressState(
    ActiveExerciseStepProgressState state,
  );
  Future<void> saveExerciseStepResult(ActiveExerciseStepResult result);
  Future<void> deleteScoreStopwatchState({
    required String sessionId,
    required int programIndex,
    required int exerciseIndex,
    required int setIndex,
    required DateTime deletedAt,
  });
  Future<ActiveRestState?> findRestStateById(String id);
  Future<ActiveScoreStopwatchState?> findScoreStopwatchState({
    required String sessionId,
    required int programIndex,
    required int exerciseIndex,
    required int setIndex,
  });
  Future<ActiveSetTimerState?> findSetTimerState({
    required String sessionId,
    required int programIndex,
    required int exerciseIndex,
    required int setIndex,
  });
  Future<ActiveExerciseStepProgressState?> findExerciseStepProgressState({
    required String sessionId,
    required int programIndex,
    required int exerciseIndex,
    required int setIndex,
  });
  Future<List<ActiveSetResult>> listSetResults(String sessionId);
  Future<List<ActiveSetTimerState>> listSetTimerStates(String sessionId);
  Future<List<ActiveExerciseStepProgressState>> listExerciseStepProgressStates(
    String sessionId,
  );
  Future<List<ActiveExerciseStepResult>> listExerciseStepResults(
    String sessionId,
  );
  Future<List<ActiveRestState>> listRestStates(String sessionId);
  Future<List<ActiveScoreStopwatchState>> listScoreStopwatchStates(
    String sessionId,
  );
}

abstract interface class WorkoutHistoryRepository {
  Future<WorkoutHistory?> findById(String id);
  Future<List<WorkoutHistory>> listActive();
  Future<void> save(WorkoutHistory history);
  Future<void> saveSetResult(WorkoutHistorySetResult result);
  Future<void> saveStepResult(WorkoutHistoryStepResult result);
  Future<void> delete(String id, DateTime deletedAt);
}

final class ActivePerformanceMeasures {
  const ActivePerformanceMeasures({
    required this.timeEnabled,
    required this.repsEnabled,
    required this.scoreEnabled,
    this.scoreInputMode = ScoreInputMode.manual,
  });

  final bool timeEnabled;
  final bool repsEnabled;
  final bool scoreEnabled;
  final ScoreInputMode scoreInputMode;

  bool get hasAny => timeEnabled || repsEnabled || scoreEnabled;
}

enum PerformanceMetric { score, reps, time }

final class WorkoutHistorySetPerformance {
  const WorkoutHistorySetPerformance({
    required this.workoutHistoryId,
    required this.startedAt,
    required this.setIndex,
    required this.exerciseNameSnapshot,
    required this.scoreInputModeSnapshot,
    this.actualTimeMs,
    this.actualReps,
    this.actualScore,
    this.actualScoreTimeMs,
    this.completedAt,
  });

  final String workoutHistoryId;
  final DateTime startedAt;
  final int setIndex;
  final String exerciseNameSnapshot;
  final ScoreInputMode scoreInputModeSnapshot;
  final int? actualTimeMs;
  final int? actualReps;
  final double? actualScore;
  final int? actualScoreTimeMs;
  final DateTime? completedAt;
}

final class WorkoutHistoryMetricPerformance {
  const WorkoutHistoryMetricPerformance({
    required this.workoutHistoryId,
    required this.startedAt,
    required this.setIndex,
    required this.exerciseNameSnapshot,
    required this.metric,
    required this.scoreInputModeSnapshot,
    this.actualTimeMs,
    this.actualReps,
    this.actualScore,
    this.actualScoreTimeMs,
    this.completedAt,
  });

  final String workoutHistoryId;
  final DateTime startedAt;
  final int setIndex;
  final String exerciseNameSnapshot;
  final PerformanceMetric metric;
  final ScoreInputMode scoreInputModeSnapshot;
  final int? actualTimeMs;
  final int? actualReps;
  final double? actualScore;
  final int? actualScoreTimeMs;
  final DateTime? completedAt;
}

final class ExercisePerformanceReference {
  const ExercisePerformanceReference({
    required this.hasAnyHistoryForExercise,
    this.last,
    this.record,
  });

  final bool hasAnyHistoryForExercise;
  final WorkoutHistorySetPerformance? last;
  final WorkoutHistoryMetricPerformance? record;
}

abstract interface class ExercisePerformanceReferenceRepository {
  Future<bool> hasAnyCompletedHistoryForExercise(String exerciseId);

  Future<WorkoutHistorySetPerformance?> findLatestSetPerformance({
    required String exerciseId,
    required ActivePerformanceMeasures activeMeasures,
    required int currentSetIndex,
  });

  Future<WorkoutHistoryMetricPerformance?> findBestMetricPerformance({
    required String exerciseId,
    required PerformanceMetric metric,
    required ScoreInputMode scoreInputMode,
  });
}

final class SyncRunSummary {
  const SyncRunSummary({
    required this.pushedChanges,
    required this.pulledChanges,
    this.skipped = false,
    this.failed = false,
    this.message,
  });

  final int pushedChanges;
  final int pulledChanges;
  final bool skipped;
  final bool failed;
  final String? message;
}

abstract interface class SyncGateway {
  Future<SyncRunSummary> synchronize();
}

final class NoOpSyncGateway implements SyncGateway {
  const NoOpSyncGateway();

  @override
  Future<SyncRunSummary> synchronize() async {
    return const SyncRunSummary(pushedChanges: 0, pulledChanges: 0);
  }
}