/**
 * ComfyUI V2 API 服务层
 * 基于新的后端 V2 API 的现代化前端服务接口
 */

import { invoke } from '@tauri-apps/api/core';
import { listen, UnlistenFn } from '@tauri-apps/api/event';

// ==================== 基础类型定义 ====================

export interface ComfyUIV2Config {
  base_url: string;
  timeout?: number;
  retry_attempts?: number;
  enable_cache?: boolean;
  max_concurrency?: number;
  websocket_url?: string;
}

export interface ConnectionStatus {
  connected: boolean;
  last_connected_at?: string;
  last_disconnected_at?: string;
  reconnect_attempts: number;
  total_connections: number;
  error_message?: string;
}

export interface SystemInfo {
  version: string;
  python_version: string;
  platform: string;
  gpu_info?: string;
  memory_info?: string;
  disk_info?: string;
}

export interface QueueStatus {
  running_count: number;
  pending_count: number;
  history_count: number;
}

// ==================== 工作流类型 ====================

export interface WorkflowV2 {
  id: string;
  name: string;
  description?: string;
  category?: string;
  workflow_data: any;
  input_schema?: any;
  output_schema?: any;
  created_at: string;
  updated_at: string;
  version: number;
  is_active: boolean;
  tags: string[];
}

export interface CreateWorkflowRequest {
  name: string;
  description?: string;
  category?: string;
  workflow_data: any;
  input_schema?: any;
  output_schema?: any;
  tags?: string[];
}

export interface UpdateWorkflowRequest {
  name?: string;
  description?: string;
  category?: string;
  workflow_data?: any;
  input_schema?: any;
  output_schema?: any;
  tags?: string[];
  is_active?: boolean;
}

// ==================== 模板类型 ====================

export interface TemplateV2 {
  id: string;
  name: string;
  description?: string;
  category?: string;
  workflow_id: string;
  parameter_definitions: any;
  default_values?: any;
  created_at: string;
  updated_at: string;
  version: number;
  is_active: boolean;
  tags: string[];
}

export interface CreateTemplateRequest {
  name: string;
  description?: string;
  category?: string;
  workflow_id: string;
  parameter_definitions: any;
  default_values?: any;
  tags?: string[];
}

// ==================== 执行类型 ====================

export interface ExecutionV2 {
  id: string;
  workflow_id?: string;
  template_id?: string;
  prompt_id: string;
  parameters: any;
  status: 'pending' | 'running' | 'completed' | 'failed' | 'cancelled';
  progress?: number;
  results?: any;
  output_urls?: string[];
  error_message?: string;
  execution_time?: number;
  created_at: string;
  updated_at: string;
}

export interface ExecuteWorkflowRequest {
  workflow_id: string;
  parameters?: any;
}

export interface ExecuteTemplateRequest {
  template_id: string;
  parameters: any;
}

// ==================== 实时事件类型 ====================

export interface RealtimeEvent {
  event_type: string;
  data: any;
  timestamp: string;
}

export interface ExecutionProgressEvent {
  prompt_id: string;
  execution_id?: string;
  node_id: string;
  progress: number;
  max_progress: number;
  percentage: number;
  timestamp: string;
}

export interface ExecutionCompletedEvent {
  prompt_id: string;
  execution_id?: string;
  outputs: Record<string, any>;
  output_urls: string[];
  execution_time: number;
  timestamp: string;
}

// ==================== ComfyUI V2 服务类 ====================

export class ComfyUIV2Service {
  private static eventListeners: Map<string, UnlistenFn> = new Map();

  // ==================== 连接管理 ====================

  /**
   * 连接到 ComfyUI 服务
   */
  static async connect(config: ComfyUIV2Config): Promise<string> {
    try {
      const result = await invoke<{connected: boolean, status: string, base_url: string}>('comfyui_v2_connect', { config });
      return result.connected ? '连接成功' : '连接失败';
    } catch (error) {
      console.error('Failed to connect to ComfyUI:', error);
      throw new Error(`连接 ComfyUI 失败: ${error}`);
    }
  }

  /**
   * 断开 ComfyUI 连接
   */
  static async disconnect(): Promise<string> {
    try {
      return await invoke<string>('comfyui_v2_disconnect');
    } catch (error) {
      console.error('Failed to disconnect from ComfyUI:', error);
      throw new Error(`断开 ComfyUI 连接失败: ${error}`);
    }
  }

  /**
   * 获取连接状态
   */
  static async getConnectionStatus(): Promise<ConnectionStatus> {
    try {
      return await invoke<ConnectionStatus>('comfyui_v2_get_connection_status');
    } catch (error) {
      console.error('Failed to get connection status:', error);
      throw new Error(`获取连接状态失败: ${error}`);
    }
  }

  /**
   * 健康检查
   */
  static async healthCheck(): Promise<boolean> {
    try {
      const result = await invoke<string>('comfyui_v2_health_check');
      return result === 'healthy';
    } catch (error) {
      console.error('Health check failed:', error);
      return false;
    }
  }

  /**
   * 获取系统信息
   */
  static async getSystemInfo(): Promise<SystemInfo> {
    try {
      return await invoke<SystemInfo>('comfyui_v2_get_system_info');
    } catch (error) {
      console.error('Failed to get system info:', error);
      throw new Error(`获取系统信息失败: ${error}`);
    }
  }

  /**
   * 获取队列状态
   */
  static async getQueueStatus(): Promise<QueueStatus> {
    try {
      return await invoke<QueueStatus>('comfyui_v2_get_queue_status');
    } catch (error) {
      console.error('Failed to get queue status:', error);
      throw new Error(`获取队列状态失败: ${error}`);
    }
  }

  // ==================== 配置管理 ====================

  /**
   * 获取配置
   */
  static async getConfig(): Promise<ComfyUIV2Config> {
    try {
      return await invoke<ComfyUIV2Config>('comfyui_v2_get_config');
    } catch (error) {
      console.error('Failed to get config:', error);
      throw new Error(`获取配置失败: ${error}`);
    }
  }

  /**
   * 更新配置
   */
  static async updateConfig(config: Partial<ComfyUIV2Config>): Promise<string> {
    try {
      // 获取当前配置，然后合并新配置
      let currentConfig: ComfyUIV2Config;
      try {
        currentConfig = await this.getConfig();
      } catch {
        // 如果获取失败，使用默认配置
        currentConfig = {
          base_url: 'http://192.168.0.193:8188',
          timeout: 30000,
          retry_attempts: 3,
          enable_cache: true,
          max_concurrency: 4,
          websocket_url: 'ws://192.168.0.193:8188/ws',
        };
      }

      // 合并配置
      const fullConfig: ComfyUIV2Config = {
        ...currentConfig,
        ...config,
      };

      return await invoke<string>('comfyui_v2_update_config', { configRequest: fullConfig });
    } catch (error) {
      console.error('Failed to update config:', error);
      throw new Error(`更新配置失败: ${error}`);
    }
  }

  /**
   * 验证配置
   */
  static async validateConfig(config: ComfyUIV2Config): Promise<boolean> {
    try {
      const result = await invoke<string>('comfyui_v2_validate_config', { configRequest: config });
      return result === 'valid';
    } catch (error) {
      console.error('Failed to validate config:', error);
      return false;
    }
  }

  // ==================== 工作流管理 ====================

  /**
   * 创建工作流
   */
  static async createWorkflow(request: CreateWorkflowRequest): Promise<WorkflowV2> {
    try {
      return await invoke<WorkflowV2>('comfyui_v2_create_workflow', { request });
    } catch (error) {
      console.error('Failed to create workflow:', error);
      throw new Error(`创建工作流失败: ${error}`);
    }
  }

  /**
   * 获取工作流列表
   */
  static async listWorkflows(category?: string, tags?: string[]): Promise<WorkflowV2[]> {
    try {
      return await invoke<WorkflowV2[]>('comfyui_v2_list_workflows', { category, tags });
    } catch (error) {
      console.error('Failed to list workflows:', error);
      throw new Error(`获取工作流列表失败: ${error}`);
    }
  }

  /**
   * 获取单个工作流
   */
  static async getWorkflow(id: string): Promise<WorkflowV2> {
    try {
      return await invoke<WorkflowV2>('comfyui_v2_get_workflow', { id });
    } catch (error) {
      console.error('Failed to get workflow:', error);
      throw new Error(`获取工作流失败: ${error}`);
    }
  }

  /**
   * 更新工作流
   */
  static async updateWorkflow(id: string, request: UpdateWorkflowRequest): Promise<WorkflowV2> {
    try {
      return await invoke<WorkflowV2>('comfyui_v2_update_workflow', { id, request });
    } catch (error) {
      console.error('Failed to update workflow:', error);
      throw new Error(`更新工作流失败: ${error}`);
    }
  }

  /**
   * 删除工作流
   */
  static async deleteWorkflow(id: string): Promise<string> {
    try {
      return await invoke<string>('comfyui_v2_delete_workflow', { id });
    } catch (error) {
      console.error('Failed to delete workflow:', error);
      throw new Error(`删除工作流失败: ${error}`);
    }
  }

  /**
   * 搜索工作流
   */
  static async searchWorkflows(query: string, category?: string): Promise<WorkflowV2[]> {
    try {
      return await invoke<WorkflowV2[]>('comfyui_v2_search_workflows', { query, category });
    } catch (error) {
      console.error('Failed to search workflows:', error);
      throw new Error(`搜索工作流失败: ${error}`);
    }
  }

  // ==================== 模板管理 ====================

  /**
   * 创建模板
   */
  static async createTemplate(request: CreateTemplateRequest): Promise<TemplateV2> {
    try {
      return await invoke<TemplateV2>('comfyui_v2_create_template', { request });
    } catch (error) {
      console.error('Failed to create template:', error);
      throw new Error(`创建模板失败: ${error}`);
    }
  }

  /**
   * 获取模板列表
   */
  static async listTemplates(category?: string, tags?: string[]): Promise<TemplateV2[]> {
    try {
      return await invoke<TemplateV2[]>('comfyui_v2_list_templates', { category, tags });
    } catch (error) {
      console.error('Failed to list templates:', error);
      throw new Error(`获取模板列表失败: ${error}`);
    }
  }

  /**
   * 获取单个模板
   */
  static async getTemplate(id: string): Promise<TemplateV2> {
    try {
      return await invoke<TemplateV2>('comfyui_v2_get_template', { id });
    } catch (error) {
      console.error('Failed to get template:', error);
      throw new Error(`获取模板失败: ${error}`);
    }
  }

  /**
   * 删除模板
   */
  static async deleteTemplate(id: string): Promise<string> {
    try {
      return await invoke<string>('comfyui_v2_delete_template', { id });
    } catch (error) {
      console.error('Failed to delete template:', error);
      throw new Error(`删除模板失败: ${error}`);
    }
  }

  /**
   * 预览模板实例
   */
  static async previewTemplateInstance(templateId: string, parameters: any): Promise<any> {
    try {
      return await invoke<any>('comfyui_v2_preview_template_instance', { templateId, parameters });
    } catch (error) {
      console.error('Failed to preview template instance:', error);
      throw new Error(`预览模板实例失败: ${error}`);
    }
  }

  /**
   * 验证模板参数
   */
  static async validateTemplateParameters(templateId: string, parameters: any): Promise<boolean> {
    try {
      const result = await invoke<string>('comfyui_v2_validate_template_parameters', { templateId, parameters });
      return result === 'valid';
    } catch (error) {
      console.error('Failed to validate template parameters:', error);
      return false;
    }
  }

  // ==================== 执行管理 ====================

  /**
   * 执行工作流
   */
  static async executeWorkflow(request: ExecuteWorkflowRequest): Promise<ExecutionV2> {
    try {
      return await invoke<ExecutionV2>('comfyui_v2_execute_workflow', { request });
    } catch (error) {
      console.error('Failed to execute workflow:', error);
      throw new Error(`执行工作流失败: ${error}`);
    }
  }

  /**
   * 执行模板
   */
  static async executeTemplate(request: ExecuteTemplateRequest): Promise<ExecutionV2> {
    try {
      return await invoke<ExecutionV2>('comfyui_v2_execute_template', { request });
    } catch (error) {
      console.error('Failed to execute template:', error);
      throw new Error(`执行模板失败: ${error}`);
    }
  }

  /**
   * 取消执行
   */
  static async cancelExecution(executionId: string): Promise<string> {
    try {
      return await invoke<string>('comfyui_v2_cancel_execution', { executionId });
    } catch (error) {
      console.error('Failed to cancel execution:', error);
      throw new Error(`取消执行失败: ${error}`);
    }
  }

  /**
   * 获取执行状态
   */
  static async getExecutionStatus(executionId: string): Promise<ExecutionV2> {
    try {
      return await invoke<ExecutionV2>('comfyui_v2_get_execution_status', { executionId });
    } catch (error) {
      console.error('Failed to get execution status:', error);
      throw new Error(`获取执行状态失败: ${error}`);
    }
  }

  /**
   * 获取执行历史
   */
  static async getExecutionHistory(limit?: number, status?: string): Promise<ExecutionV2[]> {
    try {
      return await invoke<ExecutionV2[]>('comfyui_v2_get_execution_history', { limit, status });
    } catch (error) {
      console.error('Failed to get execution history:', error);
      throw new Error(`获取执行历史失败: ${error}`);
    }
  }

  // ==================== 实时通信 ====================

  /**
   * 启动实时监控
   */
  static async startRealtimeMonitor(config?: any): Promise<string> {
    try {
      return await invoke<string>('comfyui_v2_start_realtime_monitor_enhanced', { config });
    } catch (error) {
      console.error('Failed to start realtime monitor:', error);
      throw new Error(`启动实时监控失败: ${error}`);
    }
  }

  /**
   * 停止实时监控
   */
  static async stopRealtimeMonitor(): Promise<string> {
    try {
      return await invoke<string>('comfyui_v2_stop_realtime_monitor_enhanced');
    } catch (error) {
      console.error('Failed to stop realtime monitor:', error);
      throw new Error(`停止实时监控失败: ${error}`);
    }
  }

  /**
   * 订阅实时事件
   */
  static async subscribeRealtimeEvents(
    eventTypes?: string[],
    callback?: (event: RealtimeEvent) => void
  ): Promise<string> {
    try {
      // 订阅后端事件
      const subscriptionId = await invoke<string>('comfyui_v2_subscribe_realtime_events_enhanced', { eventTypes });

      // 如果提供了回调，设置事件监听
      if (callback) {
        // 监听连接状态变化
        const connectionUnlisten = await listen('comfyui://connection-changed', (event) => {
          callback({
            event_type: 'connection_changed',
            data: event.payload,
            timestamp: new Date().toISOString(),
          });
        });

        // 监听执行进度
        const progressUnlisten = await listen('comfyui://execution-progress', (event) => {
          callback({
            event_type: 'execution_progress',
            data: event.payload,
            timestamp: new Date().toISOString(),
          });
        });

        // 监听执行完成
        const completedUnlisten = await listen('comfyui://execution-completed', (event) => {
          callback({
            event_type: 'execution_completed',
            data: event.payload,
            timestamp: new Date().toISOString(),
          });
        });

        // 监听执行失败
        const failedUnlisten = await listen('comfyui://execution-failed', (event) => {
          callback({
            event_type: 'execution_failed',
            data: event.payload,
            timestamp: new Date().toISOString(),
          });
        });

        // 保存监听器以便后续清理
        this.eventListeners.set(`${subscriptionId}_connection`, connectionUnlisten);
        this.eventListeners.set(`${subscriptionId}_progress`, progressUnlisten);
        this.eventListeners.set(`${subscriptionId}_completed`, completedUnlisten);
        this.eventListeners.set(`${subscriptionId}_failed`, failedUnlisten);
      }

      return subscriptionId;
    } catch (error) {
      console.error('Failed to subscribe to realtime events:', error);
      throw new Error(`订阅实时事件失败: ${error}`);
    }
  }

  /**
   * 取消订阅实时事件
   */
  static async unsubscribeRealtimeEvents(subscriptionId: string): Promise<string> {
    try {
      // 清理事件监听器
      const listenersToRemove = Array.from(this.eventListeners.keys())
        .filter(key => key.startsWith(subscriptionId));

      for (const key of listenersToRemove) {
        const unlisten = this.eventListeners.get(key);
        if (unlisten) {
          unlisten();
          this.eventListeners.delete(key);
        }
      }

      // 取消后端订阅
      return await invoke<string>('comfyui_v2_unsubscribe_realtime_events', { subscriptionId });
    } catch (error) {
      console.error('Failed to unsubscribe from realtime events:', error);
      throw new Error(`取消订阅实时事件失败: ${error}`);
    }
  }

  /**
   * 注册执行映射
   */
  static async registerExecutionMapping(promptId: string, executionId: string): Promise<string> {
    try {
      return await invoke<string>('comfyui_v2_register_execution_mapping', { promptId, executionId });
    } catch (error) {
      console.error('Failed to register execution mapping:', error);
      throw new Error(`注册执行映射失败: ${error}`);
    }
  }

  // ==================== 批量操作 ====================

  /**
   * 批量执行工作流
   */
  static async batchExecuteWorkflows(requests: ExecuteWorkflowRequest[]): Promise<ExecutionV2[]> {
    try {
      return await invoke<ExecutionV2[]>('comfyui_v2_batch_execute_workflows', { requests });
    } catch (error) {
      console.error('Failed to batch execute workflows:', error);
      throw new Error(`批量执行工作流失败: ${error}`);
    }
  }

  /**
   * 批量执行模板
   */
  static async batchExecuteTemplates(requests: ExecuteTemplateRequest[]): Promise<ExecutionV2[]> {
    try {
      return await invoke<ExecutionV2[]>('comfyui_v2_batch_execute_templates', { requests });
    } catch (error) {
      console.error('Failed to batch execute templates:', error);
      throw new Error(`批量执行模板失败: ${error}`);
    }
  }

  /**
   * 批量取消执行
   */
  static async batchCancelExecutions(executionIds: string[]): Promise<string[]> {
    try {
      return await invoke<string[]>('comfyui_v2_batch_cancel_executions', { executionIds });
    } catch (error) {
      console.error('Failed to batch cancel executions:', error);
      throw new Error(`批量取消执行失败: ${error}`);
    }
  }

  // ==================== 工具方法 ====================

  /**
   * 清理所有事件监听器
   */
  static cleanup(): void {
    for (const [key, unlisten] of this.eventListeners) {
      unlisten();
    }
    this.eventListeners.clear();
  }
}