import * as fs from 'fs';
import * as path from 'path';
import axios from 'axios';
import { CONTROLLER_KEY, getClassMetadata } from '@midwayjs/core';
import { BaseController, CoolCommException, CurdOption } from '@cool-midway/core';
import { AiOcrService } from '../../../src/modules/ai/service/ocr';
import {
  OpenAiOcrController,
  openAiOcrCurdOption,
} from '../../../src/modules/ai/controller/open/ocr';

/**
 * CoolController 元数据
 */
interface CoolControllerMeta {
  prefix?: string;
  curdOption?: CurdOption;
}

/**
 * 等待 CoolController 将 CRUD 配置写入类元数据
 */
async function waitCoolMeta(
  target: new (...args: never[]) => unknown
): Promise<CoolControllerMeta> {
  const started = Date.now();
  while (Date.now() - started < 2000) {
    const meta = getClassMetadata(CONTROLLER_KEY, target) as
      | CoolControllerMeta
      | undefined;
    if (meta?.curdOption) {
      return meta;
    }
    await new Promise<void>(resolve => setImmediate(resolve));
  }
  throw new Error(`${target.name} 的 CoolController 元数据未就绪`);
}

function serviceApiMethods(apis: CurdOption['serviceApis'] = []): string[] {
  return apis.map(api => (typeof api === 'string' ? api : api.method));
}

describe('P06: 名片 OCR 识别 (modules/ai ocr)', () => {
  const ORIGINAL_ENV = {
    OCR_API_KEY: process.env.OCR_API_KEY,
    OCR_BASE_URL: process.env.OCR_BASE_URL,
  };

  afterEach(() => {
    jest.restoreAllMocks();
    if (ORIGINAL_ENV.OCR_API_KEY === undefined) {
      delete process.env.OCR_API_KEY;
    } else {
      process.env.OCR_API_KEY = ORIGINAL_ENV.OCR_API_KEY;
    }
    if (ORIGINAL_ENV.OCR_BASE_URL === undefined) {
      delete process.env.OCR_BASE_URL;
    } else {
      process.env.OCR_BASE_URL = ORIGINAL_ENV.OCR_BASE_URL;
    }
  });

  describe('1. AiOcrService.recognize 入参与配置校验', () => {
    let service: AiOcrService;

    beforeEach(() => {
      service = new AiOcrService();
      delete process.env.OCR_API_KEY;
      delete process.env.OCR_BASE_URL;
    });

    it('imageBase64 与 imageUrl 都为空时应抛 CoolCommException', async () => {
      await expect(service.recognize({})).rejects.toThrow(CoolCommException);
      await expect(service.recognize({ imageBase64: '', imageUrl: '' })).rejects.toThrow(
        CoolCommException
      );
      await expect(
        service.recognize({ imageBase64: '   ', imageUrl: '  ' })
      ).rejects.toThrow(CoolCommException);
    });

    it('未配置 OCR_API_KEY 或 OCR_BASE_URL 时应抛中文未配置错误，禁止伪造识别结果', async () => {
      process.env.OCR_API_KEY = 'test-key';
      delete process.env.OCR_BASE_URL;

      await expect(
        service.recognize({ imageBase64: 'data:image/png;base64,abc' })
      ).rejects.toThrow(CoolCommException);

      await expect(
        service.recognize({ imageBase64: 'data:image/png;base64,abc' })
      ).rejects.toThrow(/未配置.*OCR|OCR.*未配置/);

      delete process.env.OCR_API_KEY;
      process.env.OCR_BASE_URL = 'https://ocr.example.test/v1/recognize';

      await expect(
        service.recognize({ imageUrl: 'https://cdn.example/card.jpg' })
      ).rejects.toThrow(/未配置.*OCR|OCR.*未配置/);

      // 自审：不得在未配置时返回写死姓名/公司/电话
      try {
        await service.recognize({ imageBase64: 'abc' });
        fail('应抛错');
      } catch (err) {
        expect(err).toBeInstanceOf(CoolCommException);
        const msg = String((err as Error).message);
        expect(msg).not.toMatch(/张三|李四|示例公司|13800138000/);
      }
    });
  });

  describe('2. AiOcrService.recognize 调用远程 OCR', () => {
    let service: AiOcrService;

    beforeEach(() => {
      service = new AiOcrService();
      process.env.OCR_API_KEY = 'ocr-secret-key';
      process.env.OCR_BASE_URL = 'https://ocr.example.test/v1/recognize';
    });

    it('配置齐全时应 axios.post 转发 body，映射 name/company/phone/email/title', async () => {
      const body = {
        imageBase64: 'data:image/jpeg;base64,/9j/4AAQ',
        imageUrl: undefined as string | undefined,
      };

      const postSpy = jest.spyOn(axios, 'post').mockResolvedValueOnce({
        data: {
          name: 'Alex Zheng',
          company: 'OmniCard',
          phone: '+971501234567',
          email: 'alex@omnicard.ai',
          title: 'Product Lead',
          extra: 'ignored',
        },
      });

      const result = await service.recognize(body);

      expect(postSpy).toHaveBeenCalledTimes(1);
      expect(postSpy.mock.calls[0][0]).toBe('https://ocr.example.test/v1/recognize');
      expect(postSpy.mock.calls[0][1]).toEqual(body);
      expect(postSpy.mock.calls[0][2]).toMatchObject({
        headers: {
          Authorization: 'Bearer ocr-secret-key',
        },
        timeout: 15000,
      });

      expect(result).toEqual({
        name: 'Alex Zheng',
        company: 'OmniCard',
        phone: '+971501234567',
        email: 'alex@omnicard.ai',
        title: 'Product Lead',
      });
    });

    it('对方 JSON 缺字段时应用空字符串填充，不得伪造默认姓名电话', async () => {
      jest.spyOn(axios, 'post').mockResolvedValueOnce({
        data: { name: 'Only Name' },
      });

      const result = await service.recognize({
        imageUrl: 'https://cdn.example/card.png',
      });

      expect(result).toEqual({
        name: 'Only Name',
        company: '',
        phone: '',
        email: '',
        title: '',
      });
      expect(result.phone).toBe('');
      expect(result.company).toBe('');
    });

    it('远程 OCR 请求失败时应抛错', async () => {
      jest.spyOn(axios, 'post').mockRejectedValueOnce(new Error('OCR upstream 503'));

      await expect(
        service.recognize({ imageBase64: 'base64payload' })
      ).rejects.toThrow(/OCR upstream 503|OCR|识别/);
    });
  });

  describe('3. OpenAiOcrController /open/ai/ocr/recognize', () => {
    const controllerFile = path.join(
      __dirname,
      '../../../src/modules/ai/controller/open/ocr.ts'
    );

    let meta: CoolControllerMeta;
    let option: CurdOption;

    beforeAll(async () => {
      meta = await waitCoolMeta(OpenAiOcrController);
      option = meta.curdOption as CurdOption;
    });

    it('文件路径应符合 /open/ai/ocr 自动路由约定', () => {
      expect(fs.existsSync(controllerFile)).toBe(true);
      expect(controllerFile.replace(/\\/g, '/')).toMatch(
        /modules\/ai\/controller\/open\/ocr\.ts$/
      );
    });

    it('路由前缀应为 /open/ai/ocr，serviceApis 含 recognize', () => {
      expect(meta.prefix).toBe('/open/ai/ocr');
      expect(OpenAiOcrController.prototype).toBeInstanceOf(BaseController);
      expect(option.service).toBe(AiOcrService);
      expect(openAiOcrCurdOption.service).toBe(AiOcrService);
      expect(option.api || []).toEqual([]);
      const methods = serviceApiMethods(option.serviceApis);
      expect(methods).toContain('recognize');
    });
  });
});