haoliang/Haoliang.Core/Services/StubServices.cs

/**
 * StubServices.cs - 服务桩实现
 * 
 * 为尚未实现完整业务逻辑的服务提供桩实现。
 * 这些服务在后续阶段会被真实实现替换。
 * 
 * 修订历史：
 * - 2026-04-13: 初始版本
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Hosting;
using Haoliang.Models.User;
using Haoliang.Models.Device;
using Haoliang.Models.Production;
using Haoliang.Models.System;
using Haoliang.Models.Template;
using Haoliang.Models.DataCollection;
using Haoliang.Data.Repositories;

namespace Haoliang.Core.Services
{
    #region ========== 用户与认证服务 ==========
    public class AuthService : IAuthService
    {
        private readonly IUserRepository _userRepository;
        private readonly ICacheService _cache;
        
        public AuthService(IUserRepository userRepository, ICacheService cache)
        {
            _userRepository = userRepository;
            _cache = cache;
        }
        
        public async Task<AuthResult> LoginAsync(LoginRequest request)
        {
            var user = await _userRepository.AuthenticateAsync(request.Username, request.Password);
            if (user == null)
            {
                return new AuthResult
                {
                    Success = false,
                    Message = "用户名或密码错误"
                };
            }
            
            return new AuthResult
            {
                Success = true,
                User = user,
                Message = "登录成功",
                Permissions = user.Role?.Permissions ?? new List<string>()
            };
        }
        
        public Task<bool> LogoutAsync(int userId) => Task.FromResult(true);
        
        public Task<AuthResult> RefreshTokenAsync(string refreshToken) => Task.FromResult<AuthResult>(null);
        
        public Task<bool> UsernameExistsAsync(string username) => _userRepository.UsernameExistsAsync(username);
        
        public Task<bool> EmailExistsAsync(string email) => _userRepository.EmailExistsAsync(email);
        
        public async Task<User> GetUserByIdAsync(int userId)
        {
            return await _userRepository.GetByIdAsync(userId);
        }
    }

    public class UserService : IUserService
    {
        private readonly IUserRepository _userRepository;
        
        public UserService(IUserRepository userRepository)
        {
            _userRepository = userRepository;
        }
        
        public async Task<UserViewModel> CreateUserAsync(User user)
        {
            user.CreatedAt = DateTime.Now;
            user.UpdatedAt = DateTime.Now;
            await _userRepository.AddAsync(user);
            await _userRepository.SaveAsync();
            
            return MapToUserViewModel(user);
        }
        
        public async Task<UserViewModel?> GetUserByIdAsync(int userId)
        {
            var user = await _userRepository.GetByIdAsync(userId);
            return user != null ? MapToUserViewModel(user) : null;
        }
        
        public async Task<IEnumerable<UserViewModel>> GetAllUsersAsync()
        {
            var users = await _userRepository.GetAllAsync();
            return users.Select(MapToUserViewModel);
        }
        
        public async Task<UserViewModel?> UpdateUserAsync(int userId, User user)
        {
            var existingUser = await _userRepository.GetByIdAsync(userId);
            if (existingUser == null)
                return null;
            
            existingUser.RealName = user.RealName;
            existingUser.Email = user.Email;
            existingUser.Phone = user.Phone;
            existingUser.Department = user.Department;
            existingUser.RoleId = user.RoleId;
            existingUser.IsActive = user.IsActive;
            existingUser.UpdatedAt = DateTime.Now;
            
            _userRepository.Update(existingUser);
            await _userRepository.SaveAsync();
            
            return MapToUserViewModel(existingUser);
        }
        
        public Task<bool> ChangePasswordAsync(int userId, string oldPassword, string newPassword) 
            => _userRepository.ChangePasswordAsync(userId, oldPassword, newPassword);
        
        public async Task<bool> ActivateUserAsync(int userId)
        {
            var user = await _userRepository.GetByIdAsync(userId);
            if (user == null) return false;
            
            user.IsActive = true;
            user.UpdatedAt = DateTime.Now;
            _userRepository.Update(user);
            await _userRepository.SaveAsync();
            return true;
        }
        
        public async Task<bool> DeactivateUserAsync(int userId)
        {
            var user = await _userRepository.GetByIdAsync(userId);
            if (user == null) return false;
            
            user.IsActive = false;
            user.UpdatedAt = DateTime.Now;
            _userRepository.Update(user);
            await _userRepository.SaveAsync();
            return true;
        }
        
        private UserViewModel MapToUserViewModel(User user)
        {
            return new UserViewModel
            {
                Id = user.Id,
                Username = user.Username,
                RealName = user.RealName,
                Email = user.Email,
                Phone = user.Phone,
                Role = user.Role?.RoleName,
                RoleName = user.Role?.RoleName,
                Department = user.Department,
                IsActive = user.IsActive,
                LastLoginTime = user.LastLoginTime,
                CreatedAt = user.CreatedAt,
                Permissions = user.Role?.Permissions ?? new List<string>()
            };
        }
    }

    public class PermissionService : IPermissionService
    {
        private readonly IUserRepository _userRepository;
        
        public PermissionService(IUserRepository userRepository)
        {
            _userRepository = userRepository;
        }
        
        public async Task<IEnumerable<string>> GetUserPermissionsAsync(int userId)
        {
            var user = await _userRepository.GetByIdAsync(userId);
            return user?.Role?.Permissions ?? new List<string>();
        }
        
        public async Task<bool> HasPermissionAsync(int userId, string permission)
        {
            var permissions = await GetUserPermissionsAsync(userId);
            return permissions.Contains(permission);
        }
        
        public Task AssignPermissionsToUserAsync(int userId, IEnumerable<string> permissions) => Task.CompletedTask;
        public Task RemoveAllPermissionsFromUserAsync(int userId) => Task.CompletedTask;
    }
    #endregion

    #region ========== 日志与缓存服务 ==========
    public class LoggingService : ILoggingService
    {
        public Task LogInformationAsync(string message) { Console.WriteLine($"[INFO] {message}"); return Task.CompletedTask; }
        public Task LogWarningAsync(string message) { Console.WriteLine($"[WARN] {message}"); return Task.CompletedTask; }
        public Task LogErrorAsync(string message, Exception? exception = null) { Console.WriteLine($"[ERROR] {message}: {exception?.Message}"); return Task.CompletedTask; }
        public Task<IEnumerable<LogEntry>> GetLogsAsync(Haoliang.Models.System.LogLevel? logLevel, DateTime? startDate, DateTime? endDate, string? category = null) => Task.FromResult<IEnumerable<LogEntry>>(new List<LogEntry>());
        public Task<IEnumerable<LogEntry>> GetErrorLogsAsync(DateTime? startDate = null, DateTime? endDate = null) => Task.FromResult<IEnumerable<LogEntry>>(new List<LogEntry>());
        public Task<int> GetLogCountAsync(Haoliang.Models.System.LogLevel? logLevel = null, DateTime? startDate = null, DateTime? endDate = null) => Task.FromResult(0);
        public Task ArchiveLogsAsync(int daysToKeep = 90) => Task.CompletedTask;
        public Task ClearLogsAsync() => Task.CompletedTask;
        public Task LogInfoAsync(string message) { Console.WriteLine($"[INFO] {message}"); return Task.CompletedTask; }
    }

    public class MemoryCacheService : ICacheService
    {
        private readonly Dictionary<string, object> _cache = new Dictionary<string, object>();
        public T? Get<T>(string key) where T : class => _cache.TryGetValue(key, out var value) ? value as T : null;
        public void Set<T>(string key, T value, TimeSpan? expiration = null) where T : class { _cache[key] = value; }
        public bool Remove(string key) => _cache.Remove(key);
        public bool Exists(string key) => _cache.ContainsKey(key);
        public T GetOrSet<T>(string key, Func<T> factory, TimeSpan? expiration = null) where T : class { if (!_cache.TryGetValue(key, out var value)) { value = factory(); _cache[key] = value; } return (T)value; }
        public void Clear() => _cache.Clear();
        public CacheStats GetStatistics() => new CacheStats();
    }
    #endregion

    #region ========== 设备状态机服务 ==========
    public class DeviceStateMachine : IDeviceStateMachine, IHostedService
    {
        public DeviceStatus GetCurrentState(int deviceId) => new DeviceStatus();
        public bool TransitionTo(int deviceId, DeviceStatus newState) => false;
        public void RegisterStateChangeHandler(int deviceId, Action<int, DeviceStatus, DeviceStatus> callback) { }
        public IEnumerable<DeviceStatusChange> GetStateHistory(int deviceId, DateTime fromTime, DateTime toTime) => new List<DeviceStatusChange>();
        
        public Task StartAsync(CancellationToken cancellationToken) => Task.CompletedTask;
        public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
    }
    #endregion

    #region ========== 生产统计服务 ==========
    public class ProductionService : IProductionService
    {
        public Task<ProductionSummary> GetProductionSummaryAsync(DateTime date) => Task.FromResult<ProductionSummary>(null);
        public Task<ProductionStatistics> GetProductionStatisticsAsync(DateTime date) => Task.FromResult<ProductionStatistics>(null);
        public Task<ProductionRecord> GetTodayProductionAsync(int deviceId) => Task.FromResult<ProductionRecord>(null);
        public Task<ProductionStatistics> GetProductionStatisticsAsync(int deviceId, DateTime date) => Task.FromResult<ProductionStatistics>(null);
        public Task<decimal> GetQualityRateAsync(int deviceId, DateTime date) => Task.FromResult(0m);
        public Task CalculateAllProductionAsync() => Task.CompletedTask;
        public Task CalculateProductionAsync(int deviceId) => Task.CompletedTask;
        public Task<IEnumerable<string>> GetProductionProgramsAsync(DateTime date) => Task.FromResult<IEnumerable<string>>(new List<string>());
        public Task<ProgramProductionSummary> GetProgramProductionAsync(string programName, DateTime date) => Task.FromResult<ProgramProductionSummary>(null);
        public Task<byte[]> ExportProductionDataAsync(DateTime startDate, DateTime endDate) => Task.FromResult<byte[]>(null);
        public Task ArchiveProductionDataAsync(int daysToKeep = 90) => Task.CompletedTask;
        public Task<ProductionRecord> GetDeviceProductionForDateAsync(int deviceId, DateTime date) => Task.FromResult<ProductionRecord>(null);
    }

    public class ProductionScheduler : IProductionScheduler
    {
        private bool _isRunning;
        public Task StartAsync() { _isRunning = true; return Task.CompletedTask; }
        public Task StopAsync() { _isRunning = false; return Task.CompletedTask; }
        public void RegisterTask(string taskId, string schedule, Func<Task> action) { }
        public void RemoveTask(string taskId) { }
        public bool IsRunning => _isRunning;
    }

    public class ProductionStatisticsService : IProductionStatisticsService
    {
        public Task<ProductionTrendAnalysis> CalculateProductionTrendsAsync(int deviceId, DateTime startDate, DateTime endDate) => Task.FromResult<ProductionTrendAnalysis>(null);
        public Task<ProductionReport> GenerateProductionReportAsync(ReportFilter filter) => Task.FromResult<ProductionReport>(null);
        public Task<EfficiencyMetrics> CalculateEfficiencyMetricsAsync(EfficiencyFilter filter) => Task.FromResult<EfficiencyMetrics>(null);
        public Task<QualityAnalysis> PerformQualityAnalysisAsync(QualityFilter filter) => Task.FromResult<QualityAnalysis>(null);
        public Task<DashboardSummary> GetDashboardSummaryAsync(DashboardFilter filter) => Task.FromResult<DashboardSummary>(null);
        public Task<OeeMetrics> CalculateOeeAsync(int deviceId, DateTime date) => Task.FromResult<OeeMetrics>(null);
        public Task<ProductionForecast> GenerateProductionForecastAsync(ForecastFilter filter) => Task.FromResult<ProductionForecast>(null);
        public Task<AnomalyAnalysis> DetectProductionAnomaliesAsync(AnomalyFilter filter) => Task.FromResult<AnomalyAnalysis>(null);
    }
    #endregion

    #region ========== 告警服务 ==========
    public class AlarmService : IAlarmService
    {
        public Task<IEnumerable<Alarm>> GetAllAlarmsAsync() => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
        public Task<IEnumerable<Alarm>> GetAlarmsByTypeAsync(AlarmType type) => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
        public Task<IEnumerable<Alarm>> GetActiveAlarmsAsync() => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
        public Task<Alarm?> GetAlarmByIdAsync(int alarmId) => Task.FromResult<Alarm?>(null);
        public Task<Alarm> CreateAlarmAsync(Alarm alarm) => Task.FromResult(alarm);
        public Task<Alarm?> UpdateAlarmAsync(int alarmId, Alarm alarm) => Task.FromResult<Alarm?>(null);
        public Task<bool> DeleteAlarmAsync(int alarmId) => Task.FromResult(false);
        public Task<bool> ResolveAlarmAsync(int alarmId, string? resolutionNote) => Task.FromResult(false);
        public Task<bool> AcknowledgeAlarmAsync(int alarmId, string? acknowledgeNote) => Task.FromResult(false);
        public Task<IEnumerable<Alarm>> GetDeviceAlarmsAsync(int deviceId, int days = 7) => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
        public Task<IEnumerable<Alarm>> GetCriticalAlarmsAsync() => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
        public Task<AlarmStatistics> GetAlarmStatisticsAsync(DateTime date) => Task.FromResult<AlarmStatistics>(null);
        public Task<IEnumerable<Alarm>> GetAlarmsByDateRangeAsync(DateTime startDate, DateTime endDate) => Task.FromResult<IEnumerable<Alarm>>(new List<Alarm>());
    }

    public class AlarmRuleService : IAlarmRuleService
    {
        public Task<IEnumerable<AlarmRule>> GetAllAlarmRulesAsync() => Task.FromResult<IEnumerable<AlarmRule>>(new List<AlarmRule>());
        public Task<AlarmRule?> GetAlarmRuleByIdAsync(int ruleId) => Task.FromResult<AlarmRule?>(null);
        public Task<AlarmRule> CreateAlarmRuleAsync(AlarmRule rule) => Task.FromResult(rule);
        public Task<AlarmRule?> UpdateAlarmRuleAsync(int ruleId, AlarmRule rule) => Task.FromResult<AlarmRule?>(null);
        public Task<bool> DeleteAlarmRuleAsync(int ruleId) => Task.FromResult(false);
        public Task TestAlarmRuleAsync(int ruleId) => Task.CompletedTask;
        public Task SetAlarmRuleEnabledAsync(int ruleId, bool enabled) => Task.CompletedTask;
    }

    public class AlarmNotificationService : IAlarmNotificationService
    {
        public Task SendAlarmNotificationAsync(AlarmNotification notification) => Task.CompletedTask;
        public Task SendAlarmNotificationToChannelsAsync(Alarm alarm, IEnumerable<NotificationChannel> channels) => Task.CompletedTask;
        public Task<NotificationStatus> GetNotificationStatusAsync(int notificationId) => Task.FromResult(default(NotificationStatus));
        public Task RetryNotificationAsync(int notificationId) => Task.CompletedTask;
        public Task CancelNotificationAsync(int notificationId) => Task.CompletedTask;
    }
    #endregion

    #region ========== 模板服务 ==========
    public class TemplateService : ITemplateService
    {
        public Task<IEnumerable<CNCBrandTemplate>> GetAllTemplatesAsync() => Task.FromResult<IEnumerable<CNCBrandTemplate>>(new List<CNCBrandTemplate>());
        public Task<CNCBrandTemplate?> GetTemplateByIdAsync(int templateId) => Task.FromResult<CNCBrandTemplate?>(null);
        public Task<CNCBrandTemplate> CreateTemplateAsync(CNCBrandTemplate template) => Task.FromResult(template);
        public Task<CNCBrandTemplate?> UpdateTemplateAsync(int templateId, CNCBrandTemplate template) => Task.FromResult<CNCBrandTemplate?>(null);
        public Task<bool> DeleteTemplateAsync(int templateId) => Task.FromResult(true);
        public Task<bool> EnableTemplateAsync(int templateId) => Task.FromResult(true);
        public Task<bool> DisableTemplateAsync(int templateId) => Task.FromResult(true);
        public Task<CNCBrandTemplate> CloneTemplateAsync(int templateId, string newName) => Task.FromResult<CNCBrandTemplate>(null);
        public Task TestTemplateAsync(int templateId) => Task.CompletedTask;
        public Task<IEnumerable<CNCBrandTemplate>> GetTemplatesByBrandAsync(string brandName) => Task.FromResult<IEnumerable<CNCBrandTemplate>>(new List<CNCBrandTemplate>());
        public Task<IEnumerable<CNCBrandTemplate>> GetActiveTemplatesAsync() => Task.FromResult<IEnumerable<CNCBrandTemplate>>(new List<CNCBrandTemplate>());
        public Task<bool> ValidateTemplateAsync(CNCBrandTemplate template) => Task.FromResult(true);
    }

    public class TagMappingService : ITagMappingService
    {
        public Task<IEnumerable<TagMapping>> GetMappingsByTemplateAsync(int templateId) => Task.FromResult<IEnumerable<TagMapping>>(new List<TagMapping>());
        public Task<TagMapping> CreateTagMappingAsync(TagMapping mapping) => Task.FromResult(mapping);
        public Task CreateTagMappingsAsync(int templateId, IEnumerable<TagMapping> mappings) => Task.CompletedTask;
        public Task<TagMapping> UpdateTagMappingAsync(int mappingId, TagMapping mapping) => Task.FromResult(mapping);
        public Task<bool> DeleteTagMappingAsync(int mappingId) => Task.FromResult(false);
        public Task<IEnumerable<Haoliang.Models.Device.TagData>> MapDeviceTagsAsync(IEnumerable<Haoliang.Models.Device.TagData> deviceTags, int templateId) => Task.FromResult<IEnumerable<Haoliang.Models.Device.TagData>>(new List<Haoliang.Models.Device.TagData>());
        public Task<TagMapping?> GetMappingBySystemFieldAsync(int templateId, string systemFieldId) => Task.FromResult<TagMapping?>(null);
    }

    public class TemplateValidationService : ITemplateValidationService
    {
        public Task<IEnumerable<string>> ValidateTemplateForDeviceAsync(int templateId, int deviceId) => Task.FromResult<IEnumerable<string>>(new List<string>());
        public Task<TemplateMigrationReport> GenerateMigrationReportAsync(CNCBrandTemplate template, string targetBrand) => Task.FromResult<TemplateMigrationReport>(null);
        public Task<TemplateValidationResult> ValidateTemplateCompletenessAsync(CNCBrandTemplate template) => Task.FromResult<TemplateValidationResult>(null);
    }

    public class TemplateMigrationService : ITemplateMigrationService
    {
        public Task<CNCBrandTemplate> MigrateTemplateAsync(int sourceTemplateId, string targetBrand) => Task.FromResult<CNCBrandTemplate>(null);
        public Task<bool> CanMigrateAsync(int sourceTemplateId, string targetBrand) => Task.FromResult(false);
        public Task<IEnumerable<TagMappingSuggestion>> GetMigrationMappingSuggestionsAsync(int sourceTemplateId, string targetBrand) => Task.FromResult<IEnumerable<TagMappingSuggestion>>(new List<TagMappingSuggestion>());
    }
    #endregion

    #region ========== 系统服务 ==========
    public class SystemService : ISystemService
    {
        public Task<SystemStatusInfo> GetSystemStatusAsync() => Task.FromResult<SystemStatusInfo>(null);
        public Task<HealthCheckResult> PerformHealthCheckAsync() => Task.FromResult<HealthCheckResult>(null);
        public Task<SystemMetrics> GetSystemMetricsAsync() => Task.FromResult<SystemMetrics>(null);
        public Task RestartAsync() => Task.CompletedTask;
    }

    public class SystemConfigService : ISystemConfigService
    {
        public Task<IEnumerable<SystemConfig>> GetAllConfigsAsync() => Task.FromResult<IEnumerable<SystemConfig>>(new List<SystemConfig>());
        public Task<SystemConfig?> GetConfigAsync(string key) => Task.FromResult<SystemConfig?>(null);
        public Task<SystemConfig> SetConfigAsync(string key, string value) => Task.FromResult(new SystemConfig { Key = key, Value = value });
        public Task<bool> DeleteConfigAsync(string key) => Task.FromResult(true);
        public Task<bool> ConfigExistsAsync(string key) => Task.FromResult(false);
        public Task<IEnumerable<SystemConfig>> GetConfigsByCategoryAsync(string category) => Task.FromResult<IEnumerable<SystemConfig>>(new List<SystemConfig>());
        public Task RefreshConfigCacheAsync() => Task.CompletedTask;
        public Task<object> GetSystemConfigurationAsync() => Task.FromResult<object>(new { });
        public Task<bool> UpdateSystemConfigurationAsync(object configuration) => Task.FromResult(true);
        public Task<bool> ValidateConfigurationAsync(object configuration) => Task.FromResult(true);
        public Task<IEnumerable<object>> GetProductionTargetsAsync() => Task.FromResult<IEnumerable<object>>(new List<object>());
        public Task<bool> UpdateProductionTargetsAsync(IEnumerable<object> targets) => Task.FromResult(true);
        public Task<object> GetWorkingHoursConfigAsync() => Task.FromResult<object>(new { });
        public Task<bool> UpdateWorkingHoursConfigAsync(object config) => Task.FromResult(true);
        public Task<object> GetAlertConfigurationAsync() => Task.FromResult<object>(new { });
        public Task<bool> UpdateAlertConfigurationAsync(object config) => Task.FromResult(true);
        public Task<object> GetNotificationConfigAsync() => Task.FromResult<object>(new { });
        public Task<bool> UpdateNotificationConfigAsync(object config) => Task.FromResult(true);
        public Task<object> GetExportConfigAsync() => Task.FromResult<object>(new { });
        public Task<bool> UpdateExportConfigAsync(object config) => Task.FromResult(true);
        public Task<object> GetDataRetentionConfigAsync() => Task.FromResult<object>(new { });
        public Task<bool> UpdateDataRetentionConfigAsync(object config) => Task.FromResult(true);
        public Task<object> GetDashboardConfigAsync() => Task.FromResult<object>(new { });
        public Task<bool> UpdateDashboardConfigAsync(object config) => Task.FromResult(true);
        public Task<object> GetCollectionConfigAsync() => Task.FromResult<object>(new { });
        public Task<bool> UpdateCollectionConfigAsync(object config) => Task.FromResult(true);
        public Task<bool> ImportConfigurationAsync(string configuration) => Task.FromResult(true);
        public Task<bool> ResetToDefaultConfigurationAsync() => Task.FromResult(true);
        public Task<IEnumerable<object>> GetConfigurationChangeHistoryAsync(DateTime? startDate = null, DateTime? endDate = null) => Task.FromResult<IEnumerable<object>>(new List<object>());
    }

    public class SchedulerService : ISchedulerService
    {
        public Task<IEnumerable<ScheduledTask>> GetAllScheduledTasksAsync() => Task.FromResult<IEnumerable<ScheduledTask>>(new List<ScheduledTask>());
        public Task<ScheduledTask?> GetTaskByIdAsync(string taskId) => Task.FromResult<ScheduledTask?>(null);
        public Task ScheduleTaskAsync(ScheduledTask task) => Task.CompletedTask;
        public Task ExecuteTaskAsync(string taskId) => Task.CompletedTask;
        public Task<bool> RemoveTaskAsync(string taskId) => Task.FromResult(false);
        public Task StartSchedulerAsync() => Task.CompletedTask;
        public Task StopSchedulerAsync() => Task.CompletedTask;
    }
    #endregion

    #region ========== 实时服务 ==========
    public class RealTimeService : IRealTimeService
    {
        public Task<int> GetConnectedClientsCountAsync() => Task.FromResult(0);
        public Task<IEnumerable<ClientInfo>> GetConnectedClientsByTypeAsync(string clientType) => Task.FromResult<IEnumerable<ClientInfo>>(new List<ClientInfo>());
        public Task<DeviceMonitoringStatus> GetDeviceMonitoringStatusAsync(int deviceId) => Task.FromResult<DeviceMonitoringStatus>(null);
        public Task StartDeviceStreamingAsync(int deviceId, int intervalMs = 1000) => Task.CompletedTask;
        public Task StopDeviceStreamingAsync(int deviceId) => Task.CompletedTask;
        public Task<IEnumerable<int>> GetActiveStreamingDevicesAsync() => Task.FromResult<IEnumerable<int>>(new List<int>());
        public Task BroadcastDeviceStatusAsync(DeviceStatusUpdate statusUpdate) => Task.CompletedTask;
        public Task BroadcastProductionUpdateAsync(ProductionUpdate productionUpdate) => Task.CompletedTask;
        public Task BroadcastAlertAsync(AlertUpdate alertUpdate) => Task.CompletedTask;
        public Task SendSystemNotificationAsync(SystemNotification notification) => Task.CompletedTask;
        public Task SendDashboardUpdateAsync(DashboardUpdate dashboardUpdate) => Task.CompletedTask;
        public Task SendCommandToClientAsync(string connectionId, RealTimeCommand command) => Task.CompletedTask;
        public Task BroadcastCommandAsync(RealTimeCommand command) => Task.CompletedTask;
    }
    #endregion

    #region ========== 规则服务 ==========
    public class RulesService : IRulesService
    {
        public Task<IEnumerable<BusinessRule>> GetAllRulesAsync() => Task.FromResult<IEnumerable<BusinessRule>>(new List<BusinessRule>());
        public Task<BusinessRule?> GetRuleByIdAsync(int ruleId) => Task.FromResult<BusinessRule?>(null);
        public Task<BusinessRule> CreateRuleAsync(BusinessRule rule) => Task.FromResult(rule);
        public Task<BusinessRule?> UpdateRuleAsync(int ruleId, BusinessRule rule) => Task.FromResult<BusinessRule?>(null);
        public Task<bool> DeleteRuleAsync(int ruleId) => Task.FromResult(true);
        public Task<RuleExecutionResult> ExecuteRuleAsync(int ruleId, Dictionary<string, object> context) => Task.FromResult<RuleExecutionResult>(null);
        public Task<RuleTestResult> TestRuleAsync(int ruleId, Dictionary<string, object> testData) => Task.FromResult<RuleTestResult>(null);
        public Task<IEnumerable<RuleExecutionHistory>> GetRuleExecutionHistoryAsync(int ruleId, DateTime fromTime, DateTime toTime) => Task.FromResult<IEnumerable<RuleExecutionHistory>>(new List<RuleExecutionHistory>());
        public Task<BusinessRule> CreateOrUpdateRuleAsync(BusinessRule rule) => Task.FromResult(rule);
        public Task<IEnumerable<BusinessRule>> GetStatisticsRulesAsync() => Task.FromResult<IEnumerable<BusinessRule>>(new List<BusinessRule>());
        public Task<bool> UpdateStatisticsRulesAsync(IEnumerable<BusinessRule> rules) => Task.FromResult(true);
    }
    #endregion

    #region ========== 重试服务 ==========
    public class RetryService : IRetryService
    {
        public async Task<T> ExecuteWithRetryAsync<T>(Func<Task<T>> operation, int maxRetries = 3, TimeSpan? delay = null) 
        { 
            for (int i = 0; i < maxRetries; i++) 
            { 
                try { return await operation(); } 
                catch { if (i == maxRetries - 1) throw; } 
            } 
            return default; 
        }
        public async Task ExecuteWithRetryAsync(Func<Task> operation, int maxRetries = 3, TimeSpan? delay = null) 
        { 
            for (int i = 0; i < maxRetries; i++) 
            { 
                try { await operation(); return; } 
                catch { if (i == maxRetries - 1) throw; } 
            } 
        }
    }
    #endregion

    #region ========== 后台任务服务 ==========
    public class BackgroundTaskService : IHostedService
    {
        public Task StartAsync(CancellationToken cancellationToken) => Task.CompletedTask;
        public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
    }
    #endregion
}