/// Providers: Project Submissions
///
/// Riverpod providers for managing project submissions state.
library;

import 'package:riverpod_annotation/riverpod_annotation.dart';
import 'package:worker/core/network/dio_client.dart';
import 'package:worker/features/projects/data/datasources/project_status_local_datasource.dart';
import 'package:worker/features/projects/data/datasources/submissions_remote_datasource.dart';
import 'package:worker/features/projects/data/repositories/submissions_repository_impl.dart';
import 'package:worker/features/projects/domain/entities/project_status.dart';
import 'package:worker/features/projects/domain/entities/project_submission.dart';
import 'package:worker/features/projects/domain/repositories/submissions_repository.dart';

part 'submissions_provider.g.dart';

/// Project Status Local Data Source Provider
@riverpod
ProjectStatusLocalDataSource projectStatusLocalDataSource(Ref ref) {
  return ProjectStatusLocalDataSource();
}

/// Submissions Remote Data Source Provider
@riverpod
Future<SubmissionsRemoteDataSource> submissionsRemoteDataSource(Ref ref) async {
  final dioClient = await ref.watch(dioClientProvider.future);
  return SubmissionsRemoteDataSourceImpl(dioClient);
}

/// Submissions Repository Provider
@riverpod
Future<SubmissionsRepository> submissionsRepository(Ref ref) async {
  final remoteDataSource = await ref.watch(submissionsRemoteDataSourceProvider.future);
  final statusLocalDataSource = ref.watch(projectStatusLocalDataSourceProvider);
  return SubmissionsRepositoryImpl(remoteDataSource, statusLocalDataSource);
}

/// Project Status List Provider
///
/// Fetches project status options from API with cache-first pattern.
/// This is loaded before submissions to ensure filter options are available.
@riverpod
class ProjectStatusList extends _$ProjectStatusList {
  @override
  Future<List<ProjectStatus>> build() async {
    final repository = await ref.watch(submissionsRepositoryProvider.future);
    return repository.getProjectStatusList();
  }

  /// Refresh status list from remote (force refresh)
  Future<void> refresh() async {
    state = const AsyncValue.loading();
    state = await AsyncValue.guard(() async {
      final repository = await ref.read(submissionsRepositoryProvider.future);
      return repository.getProjectStatusList(forceRefresh: true);
    });
  }
}

/// All Submissions Provider
///
/// Fetches and manages submissions data from remote.
/// Waits for project status list to be loaded first.
@riverpod
class AllSubmissions extends _$AllSubmissions {
  @override
  Future<List<ProjectSubmission>> build() async {
    // Ensure status list is loaded first (for filter options)
    await ref.watch(projectStatusListProvider.future);

    // Then fetch submissions
    final repository = await ref.watch(submissionsRepositoryProvider.future);
    return repository.getSubmissions();
  }

  /// Refresh submissions from remote
  Future<void> refresh() async {
    state = const AsyncValue.loading();
    state = await AsyncValue.guard(() async {
      // Also refresh status list
      await ref.read(projectStatusListProvider.notifier).refresh();

      final repository = await ref.read(submissionsRepositoryProvider.future);
      return repository.getSubmissions();
    });
  }
}

/// Submissions Filter State
///
/// Manages search and status filter state.
/// Status filter uses the status label string from API (e.g., "Chờ phê duyệt").
@riverpod
class SubmissionsFilter extends _$SubmissionsFilter {
  @override
  ({String searchQuery, String? selectedStatus}) build() {
    return (searchQuery: '', selectedStatus: null);
  }

  /// Update search query
  void updateSearchQuery(String query) {
    state = (searchQuery: query, selectedStatus: state.selectedStatus);
  }

  /// Select a status filter (uses Vietnamese label from API)
  void selectStatus(String? status) {
    state = (searchQuery: state.searchQuery, selectedStatus: status);
  }

  /// Clear status filter
  void clearStatusFilter() {
    state = (searchQuery: state.searchQuery, selectedStatus: null);
  }

  /// Clear search query
  void clearSearchQuery() {
    state = (searchQuery: '', selectedStatus: state.selectedStatus);
  }

  /// Clear all filters
  void clearAllFilters() {
    state = (searchQuery: '', selectedStatus: null);
  }
}

/// Filtered Submissions Provider
///
/// Combines submissions data with filter state to return filtered results.
@riverpod
AsyncValue<List<ProjectSubmission>> filteredSubmissions(Ref ref) {
  final dataAsync = ref.watch(allSubmissionsProvider);
  final filter = ref.watch(submissionsFilterProvider);

  return dataAsync.whenData((submissions) {
    var filtered = submissions;

    // Filter by status (matches Vietnamese label from API)
    if (filter.selectedStatus != null) {
      filtered = filtered.where((s) => s.status == filter.selectedStatus).toList();
    }

    // Filter by search query
    if (filter.searchQuery.isNotEmpty) {
      final query = filter.searchQuery.toLowerCase();
      filtered = filtered.where((s) {
        return s.submissionId.toLowerCase().contains(query) ||
            s.designedArea.toLowerCase().contains(query);
      }).toList();
    }

    // Sort by request date (newest first)
    filtered.sort((a, b) => b.requestDate.compareTo(a.requestDate));

    return filtered;
  });
}