import { describe, it, expect, beforeEach, vi, afterEach } from 'vitest';
import { testClient } from 'hono/testing';
import { DataSource } from 'typeorm';
import { File } from '@/server/modules/files/file.entity';
import { FileService } from '@/server/modules/files/file.service';
import { MinioService } from '@/server/modules/files/minio.service';
import { authMiddleware } from '@/server/middleware/auth.middleware';
import { fileApiRoutes } from '@/server/api';

// Mock dependencies
vi.mock('@/server/modules/files/file.service', () => ({
  FileService: vi.fn().mockImplementation(() => ({
    createFile: vi.fn()
  }))
}));
vi.mock('@/server/modules/files/minio.service');
vi.mock('@/server/middleware/auth.middleware');

describe('File API Integration Tests', () => {
  let client: ReturnType<typeof testClient<typeof fileApiRoutes>>['api']['v1'];
  let mockFileService: FileService;
  let mockDataSource: DataSource;

  beforeEach(async () => {
    vi.clearAllMocks();

    mockDataSource = {} as DataSource;

    // Mock auth middleware to bypass authentication
    vi.mocked(authMiddleware).mockImplementation(async (_, next) => {
      await next();
    });

    // Get the mocked FileService instance
    mockFileService = new FileService(mockDataSource);

    client = testClient(fileApiRoutes).api.v1;
  });

  afterEach(() => {
    vi.clearAllMocks();
  });

  describe('POST /api/v1/files/upload-policy', () => {
    it('should generate upload policy successfully', async () => {
      const mockFileData = {
        name: 'test.txt',
        type: 'text/plain',
        size: 1024,
        path: '/uploads/test.txt',
        description: 'Test file',
        uploadUserId: 1
      };

      const mockResponse = {
        file: {
          id: 1,
          ...mockFileData,
          path: '1/test-uuid-123-test.txt',
          uploadTime: new Date(),
          createdAt: new Date(),
          updatedAt: new Date()
        },
        uploadPolicy: {
          host: 'https://minio.example.com',
          key: '1/test-uuid-123-test.txt',
          bucket: 'd8dai'
        }
      };

      mockFileService.createFile = vi.fn().mockResolvedValue(mockResponse);

      const response = await client.files['upload-policy'].$post({
        json: mockFileData
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      if (response.status !== 200) {
        const error = await response.json();
        console.debug('Error response:', JSON.stringify(error, null, 2));
        console.debug('Response status:', response.status);
      }
      expect(response.status).toBe(200);
      const result = await response.json();
      expect(result).toEqual(mockResponse);
      expect(mockFileService.createFile).toHaveBeenCalledWith(mockFileData);
    });

    it('should return 400 for invalid request data', async () => {
      const invalidData = {
        name: '', // Empty name
        type: 'text/plain'
      };

      const response = await client.files['upload-policy'].$post({
        json: invalidData
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(400);
    });

    it('should handle service errors gracefully', async () => {
      const mockFileData = {
        name: 'test.txt',
        type: 'text/plain',
        uploadUserId: 1
      };

      mockFileService.createFile = vi.fn().mockRejectedValue(new Error('Service error'));

      const response = await client.files['upload-policy'].$post({
        json: mockFileData
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(500);
    });
  });

  describe('GET /api/v1/files/{id}/url', () => {
    it('should generate file access URL successfully', async () => {
      const mockUrl = 'https://minio.example.com/presigned-url';
      vi.mocked(mockFileService.getFileUrl).mockResolvedValue(mockUrl);

      const response = await client.files[':id']['url'].$get({
        param: { id: 1 }
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(200);
      const result = await response.json();
      expect(result).toEqual({ url: mockUrl });
      expect(mockFileService.getFileUrl).toHaveBeenCalledWith(1);
    });

    it('should return 404 when file not found', async () => {
      vi.mocked(mockFileService.getFileUrl).mockRejectedValue(new Error('文件不存在'));

      const response = await client.files[':id']['url'].$get({
        param: { id: 999 }
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(404);
    });
  });

  describe('GET /api/v1/files/{id}/download', () => {
    it('should generate file download URL successfully', async () => {
      const mockDownloadInfo = {
        url: 'https://minio.example.com/download-url',
        filename: 'test.txt'
      };
      vi.mocked(mockFileService.getFileDownloadUrl).mockResolvedValue(mockDownloadInfo);

      const response = await client.files[':id']['download'].$get({
        param: { id: 1 }
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(200);
      const result = await response.json();
      expect(result).toEqual(mockDownloadInfo);
      expect(mockFileService.getFileDownloadUrl).toHaveBeenCalledWith(1);
    });

    it('should return 404 when file not found for download', async () => {
      vi.mocked(mockFileService.getFileDownloadUrl).mockRejectedValue(new Error('文件不存在'));

      const response = await client.files[':id']['download'].$get({
        param: { id: 999 }
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(404);
    });
  });

  describe('DELETE /api/v1/files/{id}', () => {
    it('should delete file successfully', async () => {
      vi.mocked(mockFileService.deleteFile).mockResolvedValue(true);

      const response = await client.files[':id'].$delete({
        param: { id: 1 }
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(200);
      const result = await response.json();
      expect(result).toEqual({ success: true });
      expect(mockFileService.deleteFile).toHaveBeenCalledWith(1);
    });

    it('should return 404 when file not found for deletion', async () => {
      vi.mocked(mockFileService.deleteFile).mockRejectedValue(new Error('文件不存在'));

      const response = await client.files[':id'].$delete({
        param: { id: 999 }
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(404);
    });

    it('should handle deletion errors', async () => {
      vi.mocked(mockFileService.deleteFile).mockRejectedValue(new Error('删除失败'));

      const response = await client.files[':id'].$delete({
        param: { id: 1 }
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(500);
    });
  });

  describe('POST /api/v1/files/multipart-policy', () => {
    it('should generate multipart upload policy successfully', async () => {
      const mockRequestData = {
        name: 'large-file.zip',
        type: 'application/zip',
        size: 1024 * 1024 * 100, // 100MB
        uploadUserId: 1,
        partCount: 5
      };

      const mockResponse = {
        file: {
          id: 1,
          ...mockRequestData,
          path: '1/test-uuid-123-large-file.zip',
          uploadTime: new Date(),
          createdAt: new Date(),
          updatedAt: new Date()
        },
        uploadId: 'upload-123',
        uploadUrls: ['url1', 'url2', 'url3', 'url4', 'url5'],
        bucket: 'd8dai',
        key: '1/test-uuid-123-large-file.zip'
      };

      vi.mocked(mockFileService.createMultipartUploadPolicy).mockResolvedValue(mockResponse);

      const response = await client.files['multipart-policy'].$post({
        json: mockRequestData
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(200);
      const result = await response.json();
      expect(result).toEqual(mockResponse);
      expect(mockFileService.createMultipartUploadPolicy).toHaveBeenCalledWith(
        {
          name: 'large-file.zip',
          type: 'application/zip',
          size: 104857600,
          uploadUserId: 1
        },
        5
      );
    });

    it('should validate multipart policy request data', async () => {
      const invalidData = {
        name: 'test.zip',
        // Missing required fields
      };

      const response = await client.files['multipart-policy'].$post({
        json: invalidData
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(400);
    });
  });

  describe('POST /api/v1/files/multipart-complete', () => {
    it('should complete multipart upload successfully', async () => {
      const mockCompleteData = {
        uploadId: 'upload-123',
        bucket: 'd8dai',
        key: '1/test-file.zip',
        parts: [
          { partNumber: 1, etag: 'etag1' },
          { partNumber: 2, etag: 'etag2' }
        ]
      };

      const mockResponse = {
        fileId: 1,
        url: 'https://minio.example.com/file.zip',
        key: '1/test-file.zip',
        size: 2048
      };

      vi.mocked(mockFileService.completeMultipartUpload).mockResolvedValue(mockResponse);

      const response = await client.files['multipart-complete'].$post({
        json: mockCompleteData
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(200);
      const result = await response.json();
      expect(result).toEqual(mockResponse);
      expect(mockFileService.completeMultipartUpload).toHaveBeenCalledWith(mockCompleteData);
    });

    it('should validate complete multipart request data', async () => {
      const invalidData = {
        uploadId: 'upload-123',
        // Missing required fields
      };

      const response = await client.files['multipart-complete'].$post({
        json: invalidData
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(400);
    });

    it('should handle completion errors', async () => {
      const completeData = {
        uploadId: 'upload-123',
        bucket: 'd8dai',
        key: '1/test-file.zip',
        parts: [{ partNumber: 1, etag: 'etag1' }]
      };

      vi.mocked(mockFileService.completeMultipartUpload).mockRejectedValue(new Error('Completion failed'));

      const response = await client.files['multipart-complete'].$post({
        json: completeData
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(500);
    });
  });

  describe('CRUD Operations', () => {
    it('should list files successfully', async () => {
      const mockFiles = [
        {
          id: 1,
          name: 'file1.txt',
          type: 'text/plain',
          size: 1024,
          uploadUserId: 1
        },
        {
          id: 2,
          name: 'file2.txt',
          type: 'text/plain',
          size: 2048,
          uploadUserId: 1
        }
      ];

      vi.spyOn(mockFileService, 'getList').mockResolvedValue(mockFiles as File[]);

      const response = await client.files.$get({
        query: {}
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(200);
      const result = await response.json();
      expect(result).toEqual(mockFiles);
    });

    it('should get file by ID successfully', async () => {
      const mockFile = {
        id: 1,
        name: 'file.txt',
        type: 'text/plain',
        size: 1024,
        uploadUserId: 1
      };

      vi.spyOn(mockFileService, 'getById').mockResolvedValue(mockFile as File);

      const response = await client.files[':id'].$get({
        param: { id: 1 }
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(200);
      const result = await response.json();
      expect(result).toEqual(mockFile);
    });

    it('should search files successfully', async () => {
      const mockFiles = [
        {
          id: 1,
          name: 'document.pdf',
          type: 'application/pdf',
          size: 1024,
          uploadUserId: 1
        }
      ];

      vi.spyOn(mockFileService, 'getList').mockResolvedValue(mockFiles as File[]);

      const response = await client.files.$get({
        query: { keyword: 'document' }
      },
      {
        headers: {
          'Authorization': 'Bearer test-token'
        }
      });

      expect(response.status).toBe(200);
      const result = await response.json();
      expect(result).toEqual(mockFiles);
      expect(mockFileService.getList).toHaveBeenCalledWith(1, 10, 'document', ['name', 'type', 'description'], undefined, [], {}, undefined);
    });
  });
});