xianyan/lib/features/user_center/providers/learning_progress_provider.dart

/// ============================================================
/// 闲言APP — 学习进度状态管理
/// 创建时间: 2026-05-10
/// 更新时间: 2026-05-10
/// 作用: 学习进度数据加载、目标设置、进度更新
/// 上次更新: 初始创建
/// ============================================================

import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../../core/utils/logger.dart';
import '../services/user_center_service.dart';

class LearningProgressState {
  const LearningProgressState({
    this.isLoading = false,
    this.error,
    this.overviewData,
    this.categoryData,
    this.trendData,
    this.dailyGoal = 10,
    this.todayProgress = 0,
  });

  final bool isLoading;
  final String? error;
  final Map<String, dynamic>? overviewData;
  final Map<String, dynamic>? categoryData;
  final Map<String, dynamic>? trendData;
  final int dailyGoal;
  final int todayProgress;

  double get goalCompletionRate =>
      dailyGoal > 0 ? todayProgress / dailyGoal : 0.0;

  LearningProgressState copyWith({
    bool? isLoading,
    String? error,
    bool clearError = false,
    Map<String, dynamic>? overviewData,
    Map<String, dynamic>? categoryData,
    Map<String, dynamic>? trendData,
    int? dailyGoal,
    int? todayProgress,
  }) {
    return LearningProgressState(
      isLoading: isLoading ?? this.isLoading,
      error: clearError ? null : (error ?? this.error),
      overviewData: overviewData ?? this.overviewData,
      categoryData: categoryData ?? this.categoryData,
      trendData: trendData ?? this.trendData,
      dailyGoal: dailyGoal ?? this.dailyGoal,
      todayProgress: todayProgress ?? this.todayProgress,
    );
  }
}

class LearningProgressNotifier extends Notifier<LearningProgressState> {
  @override
  LearningProgressState build() => const LearningProgressState();
  LearningProgressNotifier();

  Future<void> loadAll() async {
    state = state.copyWith(isLoading: true, clearError: true);
    try {
      final results = await Future.wait([
        UserCenterService.getStats(),
        UserCenterService.getStats(type: StatsType.category),
        UserCenterService.getStats(
          type: StatsType.trend,
          period: StatsPeriod.week,
        ),
      ]);
      final overview = results[0];
      final todayViewCount = (overview['today_view_count'] as num?)?.toInt() ?? 0;
      state = state.copyWith(
        isLoading: false,
        overviewData: overview,
        categoryData: results[1],
        trendData: results[2],
        todayProgress: todayViewCount,
      );
    } catch (e) {
      Log.e('加载学习进度失败', e);
      state = state.copyWith(isLoading: false, error: '加载失败');
    }
  }

  Future<void> setDailyGoal(int goal) async {
    state = state.copyWith(dailyGoal: goal);
    try {
      await UserCenterService.interaction(
        action: InteractionAction.preference,
        extra: 'daily_goal:$goal',
      );
      Log.i('每日目标已设置: $goal');
    } catch (e) {
      Log.w('保存每日目标失败', e);
    }
  }

  Future<void> updateProgress({
    required int targetId,
    required String targetType,
    required int value,
  }) async {
    try {
      await UserCenterService.interaction(
        action: InteractionAction.progress,
        targetId: targetId,
        targetType: targetType,
        extra: value.clamp(0, 100).toString(),
      );
      Log.i('进度已更新: $targetType:$targetId → $value%');
    } catch (e) {
      Log.e('更新进度失败', e);
    }
  }
}

final learningProgressProvider =
    NotifierProvider<LearningProgressNotifier, LearningProgressState>(
      LearningProgressNotifier.new,
    );