import { describe, it, expect, beforeEach, vi } from 'vitest';

// 可变状态
let mockExecuteResult = {
  success: true,
  text: '任务完成',
  steps: 3,
};
let mockVisionConfig: { provider: string; apiKey: string; model: string; baseUrl?: string } | null = null;
let mockRunInBackgroundResult = 'agent-123';

// Mock loadVisionConfig
vi.mock('../../../../src/utils/config.js', () => ({
  loadVisionConfig: () => mockVisionConfig,
}));

// Mock agent manager
vi.mock('../../../../src/agent/manager.js', () => ({
  getAgentManager: () => ({
    runInBackground: vi.fn(async () => mockRunInBackgroundResult),
  }),
}));

// Mock agent registry 和 AgentExecutor
vi.mock('../../../../src/agent/index.js', () => ({
  agentRegistry: {
    listSubagents: vi.fn(() => [
      { name: 'explore', description: '代码探索', mode: 'subagent' },
      { name: 'vision', description: '图片分析', mode: 'subagent' },
    ]),
    get: vi.fn(),
  },
  AgentExecutor: class {
    execute() {
      return Promise.resolve(mockExecuteResult);
    }
  },
}));

// Mock tool registry
vi.mock('../../../../src/tools/registry.js', () => ({
  toolRegistry: {},
}));

// Mock session manager
vi.mock('../../../../src/session/index.js', () => ({
  SessionManager: vi.fn(),
}));

import { taskTool, initTaskContext, getTaskContext } from '../../../../src/tools/task/task.js';
import { agentRegistry } from '../../../../src/agent/index.js';

describe('taskTool - 扩展测试', () => {
  const createMockSession = () => ({
    getSessionId: vi.fn(() => 'parent-session'),
    createChildSession: vi.fn(() => ({
      id: 'child-session',
      messages: [],
    })),
    saveChildSession: vi.fn(),
  });

  beforeEach(() => {
    vi.clearAllMocks();
    initTaskContext(null as any, null as any);
    mockExecuteResult = {
      success: true,
      text: '任务完成',
      steps: 3,
    };
    mockVisionConfig = null;
    mockRunInBackgroundResult = 'agent-123';
  });

  describe('getTaskContext', () => {
    it('返回上下文', () => {
      initTaskContext({ model: 'test' } as any, { sessionManager: true } as any);
      expect(getTaskContext()).not.toBeNull();
    });

    it('初始化 null 时返回包含 null 的对象', () => {
      initTaskContext(null as any, null as any);
      const ctx = getTaskContext();
      expect(ctx?.baseConfig).toBeNull();
      expect(ctx?.sessionManager).toBeNull();
    });
  });

  describe('Vision Agent 处理', () => {
    it('Vision Agent 无配置时返回错误', async () => {
      mockVisionConfig = null;
      const mockSession = createMockSession();
      initTaskContext({ model: 'test' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'vision',
        description: '图片分析 Agent',
        mode: 'subagent',
        prompt: '你是视觉助手',
      });

      const result = await taskTool.execute({
        description: 'analyze image',
        prompt: '分析图片',
        subagent_type: 'vision',
      });

      expect(result.success).toBe(false);
      expect(result.error).toContain('Vision Agent 需要配置');
    });

    it('Vision Agent 有配置时成功执行', async () => {
      mockVisionConfig = {
        provider: 'openai',
        apiKey: 'vision-key',
        model: 'gpt-4o',
      };
      const mockSession = createMockSession();
      initTaskContext({ model: 'test' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'vision',
        description: '图片分析 Agent',
        mode: 'subagent',
        prompt: '你是视觉助手',
      });

      const result = await taskTool.execute({
        description: 'analyze image',
        prompt: '分析图片',
        subagent_type: 'vision',
      });

      expect(result.success).toBe(true);
    });
  });

  describe('模型选择', () => {
    it('无效模型选择返回错误', async () => {
      const mockSession = createMockSession();
      initTaskContext({ model: 'test' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'explore',
        description: '探索 Agent',
        mode: 'subagent',
        prompt: '你是探索助手',
      });

      const result = await taskTool.execute({
        description: 'test',
        prompt: 'test',
        subagent_type: 'explore',
        model: 'invalid-model',
      });

      expect(result.success).toBe(false);
      expect(result.error).toContain('无效的模型选择');
      expect(result.error).toContain('sonnet, opus, haiku');
    });

    it('sonnet 模型选择有效', async () => {
      const mockSession = createMockSession();
      initTaskContext({ model: 'original-model' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'explore',
        description: '探索 Agent',
        mode: 'subagent',
        prompt: '你是探索助手',
      });

      const result = await taskTool.execute({
        description: 'test',
        prompt: 'test',
        subagent_type: 'explore',
        model: 'sonnet',
      });

      expect(result.success).toBe(true);
    });

    it('opus 模型选择有效', async () => {
      const mockSession = createMockSession();
      initTaskContext({ model: 'original-model' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'explore',
        description: '探索 Agent',
        mode: 'subagent',
        prompt: '你是探索助手',
      });

      const result = await taskTool.execute({
        description: 'test',
        prompt: 'test',
        subagent_type: 'explore',
        model: 'opus',
      });

      expect(result.success).toBe(true);
    });

    it('haiku 模型选择有效', async () => {
      const mockSession = createMockSession();
      initTaskContext({ model: 'original-model' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'explore',
        description: '探索 Agent',
        mode: 'subagent',
        prompt: '你是探索助手',
      });

      const result = await taskTool.execute({
        description: 'test',
        prompt: 'test',
        subagent_type: 'explore',
        model: 'haiku',
      });

      expect(result.success).toBe(true);
    });
  });

  describe('后台运行模式', () => {
    it('后台运行返回 agentId', async () => {
      const mockSession = createMockSession();
      initTaskContext({ model: 'test' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'explore',
        description: '探索 Agent',
        mode: 'subagent',
        prompt: '你是探索助手',
      });

      const result = await taskTool.execute({
        description: 'background task',
        prompt: 'do something',
        subagent_type: 'explore',
        run_in_background: true,
      });

      expect(result.success).toBe(true);
      expect(result.output).toContain('agent-123');
      expect(result.output).toContain('后台启动');
      expect(result.metadata?.mode).toBe('background');
    });

    it('sessionId 不存在时使用 standalone', async () => {
      const mockSession = {
        getSessionId: vi.fn(() => null),
        createChildSession: vi.fn(() => ({
          id: 'child-session',
          messages: [],
        })),
        saveChildSession: vi.fn(),
      };
      initTaskContext({ model: 'test' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'explore',
        description: '探索 Agent',
        mode: 'subagent',
        prompt: '你是探索助手',
      });

      const result = await taskTool.execute({
        description: 'background task',
        prompt: 'do something',
        subagent_type: 'explore',
        run_in_background: true,
      });

      expect(result.success).toBe(true);
    });
  });

  describe('同步执行模式元数据', () => {
    it('同步模式返回正确 metadata', async () => {
      const mockSession = createMockSession();
      initTaskContext({ model: 'test' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'explore',
        description: '探索 Agent',
        mode: 'subagent',
        prompt: '你是探索助手',
      });

      const result = await taskTool.execute({
        description: 'test',
        prompt: 'test',
        subagent_type: 'explore',
      });

      expect(result.metadata?.mode).toBe('sync');
    });

    it('失败时也返回 metadata', async () => {
      const mockSession = createMockSession();
      initTaskContext({ model: 'test' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'explore',
        description: '探索 Agent',
        mode: 'subagent',
        prompt: '你是探索助手',
      });

      mockExecuteResult = {
        success: false,
        text: '',
        steps: 1,
      };

      const result = await taskTool.execute({
        description: 'test',
        prompt: 'test',
        subagent_type: 'explore',
      });

      expect(result.success).toBe(false);
      expect(result.metadata).toBeDefined();
      expect(result.metadata?.mode).toBe('sync');
    });

    it('失败时没有 error 消息时使用默认消息', async () => {
      const mockSession = createMockSession();
      initTaskContext({ model: 'test' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'explore',
        description: '探索 Agent',
        mode: 'subagent',
        prompt: '你是探索助手',
      });

      mockExecuteResult = {
        success: false,
        text: '',
        steps: 1,
        // 没有 error 字段
      } as any;

      const result = await taskTool.execute({
        description: 'test',
        prompt: 'test',
        subagent_type: 'explore',
      });

      expect(result.success).toBe(false);
      expect(result.error).toBe('子任务执行失败');
    });
  });

  describe('图片传递', () => {
    it('同步模式传递图片', async () => {
      const mockSession = createMockSession();
      initTaskContext({ model: 'test' } as any, mockSession as any);

      vi.mocked(agentRegistry.get).mockReturnValue({
        name: 'explore',
        description: '探索 Agent',
        mode: 'subagent',
        prompt: '你是探索助手',
      });

      const result = await taskTool.execute({
        description: 'analyze images',
        prompt: 'describe these',
        subagent_type: 'explore',
        images: [{ data: 'base64data', mimeType: 'image/png' }],
      });

      expect(result.success).toBe(true);
    });
  });
});