/// Data Source: Home Local Data Source
///
/// Handles local database operations for home feature using Hive.
/// This is the single source of truth for cached home data.
///
/// Responsibilities:
/// - Store and retrieve member card from local database
/// - Store and retrieve promotions from local database
/// - Handle data expiration and cache invalidation
library;

import 'package:worker/core/errors/exceptions.dart';
import 'package:worker/features/home/data/models/member_card_model.dart';
import 'package:worker/features/home/data/models/promotion_model.dart';

/// Home Local Data Source
///
/// Provides methods to interact with Hive database for home data.
///
/// Cache strategy:
/// - Member card: Single entry, updated on login and refresh
/// - Promotions: List entry, updated periodically
abstract class HomeLocalDataSource {
  /// Get cached member card
  ///
  /// Returns cached [MemberCardModel] if available.
  /// Throws [CacheException] if no data found or data corrupted.
  Future<MemberCardModel> getMemberCard();

  /// Cache member card
  ///
  /// Stores [MemberCardModel] in local database.
  /// Overwrites existing data.
  Future<void> cacheMemberCard(MemberCardModel memberCard);

  /// Get cached promotions
  ///
  /// Returns list of cached [PromotionModel].
  /// Returns empty list if no cached data.
  /// Throws [CacheException] if data corrupted.
  Future<List<PromotionModel>> getPromotions();

  /// Cache promotions
  ///
  /// Stores list of [PromotionModel] in local database.
  /// Overwrites existing data.
  Future<void> cachePromotions(List<PromotionModel> promotions);

  /// Clear all cached home data
  ///
  /// Used when:
  /// - User logs out
  /// - Cache needs to be invalidated
  Future<void> clearCache();

  /// Check if member card cache is valid
  ///
  /// Returns true if cache exists and not expired.
  /// Cache is considered expired after 24 hours.
  Future<bool> isMemberCardCacheValid();

  /// Check if promotions cache is valid
  ///
  /// Returns true if cache exists and not expired.
  /// Cache is considered expired after 1 hour.
  Future<bool> isPromotionsCacheValid();
}

/// Mock Implementation of Home Local Data Source
///
/// **TEMPORARY**: Uses hardcoded mock JSON data
/// **TODO**: Replace with real Hive implementation when API is available
///
/// This mock implementation provides realistic data for development and testing.
/// Uses the exact same interface as the real implementation will.
class HomeLocalDataSourceImpl implements HomeLocalDataSource {
  /// Mock JSON data for member card
  static const Map<String, dynamic> _mockMemberCardJson = {
    'memberId': 'M001',
    'name': 'La Nguyen Quynh',
    'memberType': 'architect',
    'tier': 'diamond',
    'points': 9750,
    'validUntil': '2025-12-31T23:59:59.000Z',
    'qrData': '0983441099'
  };

  /// Mock JSON data for promotions
  static const List<Map<String, dynamic>> _mockPromotionsJson = [
    {
      'id': 'P001',
      'title': 'Mua công nhắc - Khuyến mãi cảng lớn',
      'description': 'Giảm đến 30% cho đơn hàng từ 10 triệu',
      'imageUrl':
          'https://images.unsplash.com/photo-1615971677499-5467cbab01c0?w=280&h=140&fit=crop',
      'startDate': '2025-01-01T00:00:00.000Z',
      'endDate': '2025-12-31T23:59:59.000Z',
      'discountPercentage': 30,
    },
    {
      'id': 'P002',
      'title': 'Keo chà ron tặng kèm',
      'description': 'Mua gạch Eurotile tặng keo chà ron cao cấp',
      'imageUrl':
          'https://images.unsplash.com/photo-1542314831-068cd1dbfeeb?ixlib=rb-1.2.1&auto=format&fit=crop&w=800&q=80',
      'startDate': '2025-01-01T00:00:00.000Z',
      'endDate': '2025-12-31T23:59:59.000Z',
    },
    {
      'id': 'P003',
      'title': 'Ưu đãi đặc biệt thành viên VIP',
      'description': 'Chiết khấu thêm 5% cho thành viên Diamond',
      'imageUrl':
          'https://images.unsplash.com/photo-1565538420870-da08ff96a207?w=280&h=140&fit=crop',
      'startDate': '2025-01-01T00:00:00.000Z',
      'endDate': '2025-12-31T23:59:59.000Z',
      'discountPercentage': 5,
    }
  ];

  /// Constructor
  const HomeLocalDataSourceImpl();

  @override
  Future<MemberCardModel> getMemberCard() async {
    // Simulate network delay
    await Future.delayed(const Duration(milliseconds: 300));

    try {
      // Parse mock JSON data
      return MemberCardModel.fromJson(_mockMemberCardJson);
    } catch (e) {
      throw CacheException('Failed to get cached member card: $e');
    }
  }

  @override
  Future<void> cacheMemberCard(MemberCardModel memberCard) async {
    // Simulate write delay
    await Future.delayed(const Duration(milliseconds: 100));
    // Mock implementation - does nothing
    // TODO: Implement Hive write logic when API is available
  }

  @override
  Future<List<PromotionModel>> getPromotions() async {
    // Simulate network delay
    await Future.delayed(const Duration(milliseconds: 500));

    try {
      // Parse mock JSON data
      return _mockPromotionsJson
          .map((json) => PromotionModel.fromJson(json))
          .toList();
    } catch (e) {
      throw CacheException('Failed to get cached promotions: $e');
    }
  }

  @override
  Future<void> cachePromotions(List<PromotionModel> promotions) async {
    // Simulate write delay
    await Future.delayed(const Duration(milliseconds: 100));
    // Mock implementation - does nothing
    // TODO: Implement Hive write logic when API is available
  }

  @override
  Future<void> clearCache() async {
    // Simulate operation delay
    await Future.delayed(const Duration(milliseconds: 50));
    // Mock implementation - does nothing
    // TODO: Implement cache clearing when API is available
  }

  @override
  Future<bool> isMemberCardCacheValid() async {
    // Mock implementation - always return true for development
    // TODO: Implement real cache validation when API is available
    return true;
  }

  @override
  Future<bool> isPromotionsCacheValid() async {
    // Mock implementation - always return true for development
    // TODO: Implement real cache validation when API is available
    return true;
  }
}