import * as fs from 'fs';
import * as path from 'path';
import { CONTROLLER_KEY, getClassMetadata } from '@midwayjs/core';
import { BaseController, CoolCommException, CurdOption } from '@cool-midway/core';
import { AiLocalizeService } from '../../../src/modules/ai/service/localize';
import {
  AdminAiLocalizeController,
  adminAiLocalizeCurdOption,
} from '../../../src/modules/ai/controller/admin/localize';
import { LocalizeRequest, LocalizeTone } from '../../../src/comm/types/omni';

/**
 * CoolController 元数据（脚本路径解析为异步）
 */
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));
}

const SAMPLE_TEXT = 'We help global teams share digital cards.';

function localizeReq(
  extra?: Partial<LocalizeRequest>
): LocalizeRequest {
  return {
    text: extra?.text ?? SAMPLE_TEXT,
    targetLocale: extra?.targetLocale ?? 'en-US',
    tone: extra?.tone,
  };
}

describe('T39: AI 多语言本地化润色 (modules/ai localize)', () => {
  describe('1. AiLocalizeService.localize 入参校验', () => {
    let service: AiLocalizeService;

    beforeEach(() => {
      service = new AiLocalizeService();
    });

    it('缺 text 应抛 CoolCommException', async () => {
      await expect(
        service.localize({
          text: '',
          targetLocale: 'en-US',
        })
      ).rejects.toThrow(CoolCommException);

      await expect(
        service.localize({
          text: '   ',
          targetLocale: 'en-US',
        })
      ).rejects.toThrow(CoolCommException);

      await expect(
        service.localize({
          targetLocale: 'en-US',
        } as LocalizeRequest)
      ).rejects.toThrow(CoolCommException);
    });

    it('缺 targetLocale 应抛 CoolCommException', async () => {
      await expect(
        service.localize({
          text: SAMPLE_TEXT,
          targetLocale: '',
        })
      ).rejects.toThrow(CoolCommException);

      await expect(
        service.localize({
          text: SAMPLE_TEXT,
          targetLocale: '   ',
        })
      ).rejects.toThrow(CoolCommException);

      await expect(
        service.localize({
          text: SAMPLE_TEXT,
        } as LocalizeRequest)
      ).rejects.toThrow(CoolCommException);
    });
  });

  describe('2. 语气骨架与 locale 包裹', () => {
    let service: AiLocalizeService;

    beforeEach(() => {
      service = new AiLocalizeService();
    });

    it('三种 tone 返回不同文本', async () => {
      const tones: LocalizeTone[] = ['professional', 'direct', 'storytelling'];
      const texts = await Promise.all(
        tones.map(tone =>
          service.localize(localizeReq({ tone })).then(r => r.text)
        )
      );
      expect(new Set(texts).size).toBe(3);
      expect(texts.every(t => t.trim().length > 0)).toBe(true);
    });

    it('tone 缺省为 professional', async () => {
      const implicit = await service.localize(localizeReq());
      const explicit = await service.localize(
        localizeReq({ tone: 'professional' })
      );
      expect(implicit.tone).toBe('professional');
      expect(implicit.text).toBe(explicit.text);
    });

    it('zh-CN 回复含中文', async () => {
      const result = await service.localize(
        localizeReq({ targetLocale: 'zh-CN' })
      );
      expect(result.locale).toBe('zh-CN');
      expect(result.tone).toBe('professional');
      expect(/[\u4e00-\u9fff]/.test(result.text)).toBe(true);
      expect(result.text).toContain(SAMPLE_TEXT);
    });

    it('兼容 serviceApis 单对象入参并回传 locale / tone', async () => {
      const body: LocalizeRequest = {
        text: SAMPLE_TEXT,
        targetLocale: 'ar-SA',
        tone: 'direct',
      };
      const result = await service.localize(body);
      expect(result.locale).toBe('ar-SA');
      expect(result.tone).toBe('direct');
      expect(result.text.trim().length).toBeGreaterThan(0);
    });
  });

  describe('3. AdminAiLocalizeController /admin/ai/localize', () => {
    const controllerFile = path.join(
      __dirname,
      '../../../src/modules/ai/controller/admin/localize.ts'
    );

    let meta: CoolControllerMeta;
    let option: CurdOption;

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

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

    it('路由前缀应为 /admin/ai/localize', () => {
      expect(meta.prefix).toBe('/admin/ai/localize');
    });

    it('控制器应继承 BaseController，绑定 AiLocalizeService，不开 CRUD', () => {
      expect(AdminAiLocalizeController.prototype).toBeInstanceOf(BaseController);
      expect(option.service).toBe(AiLocalizeService);
      expect(adminAiLocalizeCurdOption.service).toBe(AiLocalizeService);
      expect(option.api || []).toEqual([]);
    });

    it('serviceApis 应包含 localize', () => {
      const methods = serviceApiMethods(option.serviceApis);
      expect(methods).toContain('localize');
      expect(serviceApiMethods(adminAiLocalizeCurdOption.serviceApis)).toContain(
        'localize'
      );
    });
  });
});