import type { AgentToolHandler } from '../agent.js';
import { createLogger } from '@markus/shared';

const log = createLogger('gui-tool');

export interface GUIScreenshotParams {
  outputPath?: string;
  returnBase64?: boolean;
}

export interface GUIAnalyzeParams {
  screenshotPath?: string;
  elementType?: string;
  confidenceThreshold?: number;
}

export interface GUIMouseParams {
  x: number;
  y: number;
  button?: 1 | 2 | 3;
}

export interface GUIKeyboardParams {
  text: string;
  delayMs?: number;
}

export interface GUIFindElementParams {
  query: string;
  elementType?: string;
  maxResults?: number;
}

export interface GUIScreenInfo {
  width: number;
  height: number;
  timestamp: string;
}

export interface GUIElement {
  type: string;
  x: number;
  y: number;
  width: number;
  height: number;
  text?: string;
  label?: string;
  confidence: number;
  attributes: Record<string, unknown>;
}

export interface GUIAnalysisResult {
  elements: GUIElement[];
  screenshotPath: string;
  timestamp: number;
  resolution: { width: number; height: number };
  metadata: Record<string, unknown>;
}

/**
 * GUI自动化工具
 * 提供桌面应用和网页界面的自动化能力
 */
export class GUITool implements AgentToolHandler {
  name = 'gui';
  description = 'GUI自动化工具 - 控制桌面应用、网页界面，支持截图、分析和输入操作';
  
  private config: {
    containerId: string;
    display: string;
    debug: boolean;
  };

  constructor(config?: Partial<{
    containerId: string;
    display: string;
    debug: boolean;
  }>) {
    this.config = {
      containerId: config?.containerId || process.env.GUI_CONTAINER_ID || 'gui-container',
      display: config?.display || process.env.GUI_DISPLAY || ':1',
      debug: config?.debug || process.env.NODE_ENV === 'development',
    };
  }

  async execute(params: Record<string, unknown>): Promise<string> {
    const { action, ...actionParams } = params;
    
    try {
      // 模拟GUI操作 - 在实际环境中会调用真正的GUI控制器
      // 这里返回模拟响应，用于测试和开发
      
      switch (action) {
        case 'get_screen_info':
          return JSON.stringify({
            success: true,
            data: {
              width: 1920,
              height: 1080,
              timestamp: new Date().toISOString(),
            },
            message: 'Screen info retrieved (simulated)',
          });
        
        case 'capture_screenshot':
          return JSON.stringify({
            success: true,
            data: {
              path: `/tmp/screenshot-${Date.now()}.png`,
              width: 1920,
              height: 1080,
            },
            message: 'Screenshot captured (simulated)',
          });
        
        case 'analyze_screen':
          return JSON.stringify({
            success: true,
            data: {
              elements: [
                {
                  type: 'button',
                  x: 100,
                  y: 200,
                  width: 120,
                  height: 40,
                  text: 'Submit',
                  confidence: 0.95,
                  attributes: {},
                },
                {
                  type: 'input',
                  x: 100,
                  y: 250,
                  width: 300,
                  height: 35,
                  label: 'Username',
                  confidence: 0.92,
                  attributes: {},
                },
              ],
              screenshotPath: `/tmp/screenshot-${Date.now()}.png`,
              timestamp: Date.now(),
              resolution: { width: 1920, height: 1080 },
              metadata: { simulated: true },
            },
            message: 'Screen analyzed (simulated)',
          });
        
        case 'move_mouse':
          return JSON.stringify({
            success: true,
            data: {
              position: { x: actionParams.x, y: actionParams.y },
            },
            message: `Mouse moved to (${actionParams.x}, ${actionParams.y}) (simulated)`,
          });
        
        case 'click':
          return JSON.stringify({
            success: true,
            data: {
              position: { x: actionParams.x, y: actionParams.y },
              button: actionParams.button || 1,
            },
            message: `Clicked at (${actionParams.x}, ${actionParams.y}) (simulated)`,
          });
        
        case 'type_text':
          return JSON.stringify({
            success: true,
            data: {
              text: actionParams.text,
              length: (actionParams.text as string)?.length || 0,
            },
            message: `Typed text: "${actionParams.text}" (simulated)`,
          });
        
        case 'find_element':
          return JSON.stringify({
            success: true,
            data: {
              elements: [
                {
                  type: actionParams.elementType || 'button',
                  x: 100,
                  y: 200,
                  width: 120,
                  height: 40,
                  text: 'Example Button',
                  confidence: 0.95,
                  attributes: {},
                },
              ],
              count: 1,
            },
            message: `Found elements matching "${actionParams.query}" (simulated)`,
          });
        
        case 'execute_command':
          return JSON.stringify({
            success: true,
            data: actionParams.command || {},
            message: 'GUI command executed (simulated)',
          });
        
        default:
          throw new Error(`Unknown GUI action: ${action}`);
      }
    } catch (error) {
      log.error('GUI tool execution failed', { error: String(error) });
      return JSON.stringify({
        success: false,
        error: error instanceof Error ? error.message : 'Unknown error',
        message: 'GUI operation failed',
      });
    }
  }

  get inputSchema(): Record<string, unknown> {
    return {
      type: 'object',
      properties: {
        action: {
          type: 'string',
          enum: [
            'get_screen_info',
            'capture_screenshot',
            'analyze_screen',
            'move_mouse',
            'click',
            'type_text',
            'find_element',
            'execute_command',
          ],
          description: '要执行的GUI操作',
        },
        // 截图参数
        outputPath: {
          type: 'string',
          description: '截图保存路径（可选）',
        },
        returnBase64: {
          type: 'boolean',
          description: '是否返回base64编码的截图（可选）',
        },
        // 分析参数
        screenshotPath: {
          type: 'string',
          description: '要分析的截图路径（可选）',
        },
        elementType: {
          type: 'string',
          description: '要查找的元素类型（可选）',
        },
        confidenceThreshold: {
          type: 'number',
          description: '置信度阈值（可选，0-1）',
        },
        // 鼠标参数
        x: {
          type: 'number',
          description: 'X坐标',
        },
        y: {
          type: 'number',
          description: 'Y坐标',
        },
        button: {
          type: 'number',
          enum: [1, 2, 3],
          description: '鼠标按钮：1=左键，2=中键，3=右键（可选，默认1）',
        },
        // 键盘参数
        text: {
          type: 'string',
          description: '要输入的文本',
        },
        delayMs: {
          type: 'number',
          description: '按键延迟（毫秒，可选）',
        },
        // 查找元素参数
        query: {
          type: 'string',
          description: '查找查询',
        },
        maxResults: {
          type: 'number',
          description: '最大结果数（可选）',
        },
        // 通用命令参数
        command: {
          type: 'object',
          description: 'GUI命令参数（用于execute_command）',
        },
      },
      required: ['action'],
    };
  }
}

/**
 * 创建GUI工具实例
 */
export function createGUITool(config?: Partial<{
  containerId: string;
  display: string;
  debug: boolean;
}>): GUITool {
  return new GUITool(config);
}