xianyan/lib/core/services/background/background_callback.dart

/// ============================================================
/// 闲言APP — 后台任务回调
/// 创建时间: 2026-05-25
/// 更新时间: 2026-05-25
/// 作用: Workmanager顶层静态回调函数，后台拉取每日一句→推送小组件→触发通知
/// 上次更新: 初始创建
/// ============================================================

import 'package:dio/dio.dart';
import 'package:workmanager/workmanager.dart';

import '../data/home_widget_service.dart';
import '../notification/local_notification_service.dart';
import '../../utils/logger.dart';

// ============================================================
// Workmanager 回调入口（必须是顶层函数）
// ============================================================

@pragma('vm:entry-point')
void callbackDispatcher() {
  Workmanager().executeTask((task, inputData) async {
    Log.i('BackgroundCallback: 执行后台任务 — $task');

    try {
      switch (task) {
        case BackgroundTasks.dailySentencePush:
          await _handleDailySentencePush();
        case BackgroundTasks.widgetDataSync:
          await _handleWidgetDataSync(inputData);
        default:
          Log.w('BackgroundCallback: 未知任务 — $task');
      }
    } catch (e, st) {
      Log.e('BackgroundCallback: 任务执行失败 — $task', e, st);
      return false;
    }

    return true;
  });
}

// ============================================================
// 每日一句推送 — 拉取API → 推送到HomeWidget → 触发通知
// ============================================================

Future<void> _handleDailySentencePush() async {
  final sentence = await _fetchDailySentence();
  if (sentence == null) {
    Log.w('BackgroundCallback: 每日一句获取失败，跳过推送');
    return;
  }

  final content = sentence['content'] as String? ?? '';
  final author = sentence['author'] as String? ?? '';

  if (content.isEmpty) {
    Log.w('BackgroundCallback: 每日一句内容为空，跳过推送');
    return;
  }

  try {
    await HomeWidgetService.instance.updateDailySentence(content, author);
    Log.i('BackgroundCallback: 每日一句已推送到小组件');
  } catch (e) {
    Log.e('BackgroundCallback: 推送到小组件失败', e);
  }

  try {
    await LocalNotificationService.showDailySentence(
      sentence: content,
      author: author,
    );
    Log.i('BackgroundCallback: 每日一句通知已触发');
  } catch (e) {
    Log.e('BackgroundCallback: 触发通知失败', e);
  }
}

// ============================================================
// 小组件数据同步
// ============================================================

Future<void> _handleWidgetDataSync(Map<String, dynamic>? inputData) async {
  if (inputData == null) {
    Log.w('BackgroundCallback: widgetDataSync 无输入数据');
    return;
  }

  final sentence = inputData['daily_sentence'] as String?;
  final author = inputData['daily_author'] as String?;

  if (sentence != null && sentence.isNotEmpty) {
    try {
      await HomeWidgetService.instance.updateDailySentence(sentence, author ?? '');
      Log.i('BackgroundCallback: 小组件数据同步完成');
    } catch (e) {
      Log.e('BackgroundCallback: 小组件数据同步失败', e);
    }
  }
}

// ============================================================
// 拉取今日诗词API
// ============================================================

Future<Map<String, dynamic>?> _fetchDailySentence() async {
  try {
    final dio = Dio(
      BaseOptions(
        connectTimeout: const Duration(seconds: 10),
        receiveTimeout: const Duration(seconds: 10),
      ),
    );

    final resp = await dio.get<Map<String, dynamic>>(
      'https://v2.jinrishici.com/sentence',
    );

    if (resp.statusCode == 200 && resp.data != null) {
      final data = resp.data!['data'] as Map<String, dynamic>?;
      if (data != null) {
        final content = data['content'] as String? ?? '';
        final origin = data['origin'] as Map<String, dynamic>?;
        final author = origin?['author'] as String? ?? '';

        return {
          'content': content,
          'author': author,
        };
      }
    }
  } catch (e) {
    Log.e('BackgroundCallback: 拉取每日一句失败', e);
  }
  return null;
}

// ============================================================
// 任务名常量
// ============================================================

class BackgroundTasks {
  BackgroundTasks._();

  static const String dailySentencePush = 'dailySentencePush';
  static const String widgetDataSync = 'widgetDataSync';
}