import { Test, TestingModule } from '@nestjs/testing';
import { INestApplication, ValidationPipe } from '@nestjs/common';
import request from 'supertest';
import { App } from 'supertest/types';
import { AppModule } from '../src/app.module';
import { JwtService } from '@nestjs/jwt';
import { Prisma } from '@prisma/client';
import { CustomHttpExceptionFilter } from '../src/common/filters/http-exception.filter';
import { PrismaExceptionFilter } from '../src/common/filters/prisma-exception.filter';
import { DecimalInterceptor } from '../src/common/interceptors/decimal.interceptor';
import * as fs from 'fs';
import * as path from 'path';

describe('Phase 4 Master Backlog E2E Verification Matrix (e2e)', () => {
  let app: INestApplication;
  let jwtService: JwtService;
  let adminToken: string;
  let userToken: string;

  beforeAll(async () => {
    process.env.JWT_ACCESS_SECRET =
      'test_access_secret_32_characters_minimum_entropy';
    process.env.JWT_REFRESH_SECRET =
      'test_refresh_secret_32_characters_minimum_entropy';

    const moduleFixture: TestingModule = await Test.createTestingModule({
      imports: [AppModule],
    }).compile();

    app = moduleFixture.createNestApplication();
    app.setGlobalPrefix('api');
    app.useGlobalPipes(
      new ValidationPipe({ transform: true, whitelist: true }),
    );
    app.useGlobalFilters(
      new CustomHttpExceptionFilter(),
      new PrismaExceptionFilter(),
    );
    app.useGlobalInterceptors(new DecimalInterceptor());

    await app.init();

    jwtService = new JwtService();

    adminToken = jwtService.sign(
      {
        sub: '12345678-1234-1234-1234-123456789012',
        email: 'admin@canino.ir',
        role: 'Admin',
      },
      { secret: process.env.JWT_ACCESS_SECRET },
    );

    userToken = jwtService.sign(
      {
        sub: '12345678-1234-1234-1234-123456789012',
        email: 'user@canino.ir',
        role: 'User_PetOwner',
      },
      { secret: process.env.JWT_ACCESS_SECRET },
    );
  });

  afterAll(async () => {
    if (app) {
      await app.close();
    }
  });

  describe('TASK-SEC-001: Mandatory Dual-Secret Startup Enforcement', () => {
    it('should reject startup logic if JWT_ACCESS_SECRET is missing or under 32 characters', () => {
      const validateStartup = (accessSec?: string, refreshSec?: string) => {
        if (!accessSec || accessSec.trim().length < 32) {
          throw new Error('FATAL: JWT_ACCESS_SECRET missing or short');
        }
        if (!refreshSec || refreshSec.trim().length < 32) {
          throw new Error('FATAL: JWT_REFRESH_SECRET missing or short');
        }
      };

      expect(() =>
        validateStartup('short', process.env.JWT_REFRESH_SECRET),
      ).toThrow('FATAL: JWT_ACCESS_SECRET missing or short');
      expect(() =>
        validateStartup(process.env.JWT_ACCESS_SECRET, 'short'),
      ).toThrow('FATAL: JWT_REFRESH_SECRET missing or short');
      expect(() =>
        validateStartup(
          process.env.JWT_ACCESS_SECRET,
          process.env.JWT_REFRESH_SECRET,
        ),
      ).not.toThrow();
    });
  });

  describe('TASK-SEC-002: Cryptographically Secure OTP Generation & Response Payload Hardening', () => {
    it('should NOT disclose OTP plaintext code in POST /api/auth/send-otp response', async () => {
      const httpServer = app.getHttpServer() as unknown as App;
      const response = await request(httpServer)
        .post('/api/auth/send-otp')
        .send({ phoneNumber: '09123456789' });

      expect(response.status).toBe(200);
      expect(response.body).toHaveProperty('success', true);
      expect(response.body).toHaveProperty('message');
      expect(response.body).not.toHaveProperty('code');
    });
  });

  describe('TASK-SEC-003: Role-Based Access Control (RBAC) Enforcement on Settings API', () => {
    it('should forbid non-admin users (User_PetOwner) with HTTP 403 when accessing /api/settings/ui-texts', async () => {
      const httpServer = app.getHttpServer() as unknown as App;
      const response = await request(httpServer)
        .get('/api/settings/ui-texts')
        .set('Authorization', `Bearer ${userToken}`);

      expect(response.status).toBe(403);
    });

    it('should allow admin users (Admin) with HTTP 200 when accessing /api/settings/ui-texts', async () => {
      const httpServer = app.getHttpServer() as unknown as App;
      const response = await request(httpServer)
        .get('/api/settings/ui-texts')
        .set('Authorization', `Bearer ${adminToken}`);

      expect(response.status).toBe(200);
    });
  });

  describe('TASK-FIN-001: Arbitrary-Precision Decimal Accounting & Prisma.Decimal Serialization', () => {
    it('should perform exact arbitrary-precision arithmetic (19.99 * 3 + 5.01 = 64.98)', () => {
      const item1Price = new Prisma.Decimal('19.99');
      const item1Qty = 3;
      const item2Price = new Prisma.Decimal('5.01');
      const item2Qty = 1;

      const subtotal1 = item1Price.mul(item1Qty);
      const subtotal2 = item2Price.mul(item2Qty);
      const total = subtotal1.add(subtotal2);

      expect(total.toString()).toBe('64.98');
      expect(Number(total)).toBe(64.98);
    });

    it('should transform Prisma.Decimal instances into formatted strings via DecimalInterceptor', () => {
      const interceptor = new DecimalInterceptor();
      const mockDecimal = new Prisma.Decimal('149.50');
      const testPayload = {
        id: 'ord-1',
        totalAmount: mockDecimal,
        items: [{ price: new Prisma.Decimal('49.99') }],
      };

      const decimalTransform = interceptor as unknown as {
        transform: (data: unknown) => {
          totalAmount: string;
          items: { price: string }[];
        };
      };
      const transformed = decimalTransform.transform(testPayload);
      expect(transformed.totalAmount).toBe('149.5');
      expect(transformed.items[0].price).toBe('49.99');
    });
  });

  describe('TASK-DOC-001: OpenAPI Documentation Synchronization', () => {
    it('should confirm root swagger.yml file exists and is synchronized', () => {
      const rootSwaggerPath = path.resolve(__dirname, '../../swagger.yml');
      expect(fs.existsSync(rootSwaggerPath)).toBe(true);

      const content = fs.readFileSync(rootSwaggerPath, 'utf8');
      expect(content).toContain('openapi: 3.0.0');
      expect(content).toContain('/api/auth/send-otp');
      expect(content).toContain('/api/settings');
    });
  });
});