import 'reflect-metadata';
import { Logger, ValidationPipe } from '@nestjs/common';
import { NestFactory } from '@nestjs/core';
import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
import { json, urlencoded } from 'express';
import { AppModule } from './app.module';
import { validateAppEnv } from './infra/config/env';
import { loadEnv } from './infra/config/load-env';

async function bootstrap() {
  loadEnv();
  validateAppEnv();

  const app = await NestFactory.create(AppModule, { bodyParser: false });
  const frontendUrl = process.env.FRONTEND_URL || 'http://localhost:3000';
  const allowedOrigins = new Set(
    frontendUrl
      .split(',')
      .map((origin) => origin.trim())
      .filter(Boolean),
  );
  allowedOrigins.add('http://localhost:3000');
  allowedOrigins.add('http://localhost:5173');
  const port = Number(process.env.PORT || process.env.BACKEND_PORT || 3001);
  const requestBodyLimit = process.env.REQUEST_BODY_LIMIT || '25mb';

  app.use(json({ limit: requestBodyLimit }));
  app.use(urlencoded({ extended: true, limit: requestBodyLimit }));
  app.useGlobalPipes(
    new ValidationPipe({
      forbidNonWhitelisted: true,
      transform: true,
      whitelist: true,
    }),
  );

  app.enableCors({
    origin(origin, callback) {
      if (!origin || allowedOrigins.has(origin)) {
        callback(null, true);
        return;
      }
      Logger.warn(`Origem CORS bloqueada: ${origin}`, 'Cors');
      callback(null, false);
    },
    credentials: true,
  });

  const swaggerConfig = new DocumentBuilder()
    .setTitle('Omnichannel Backend API')
    .setDescription('Documentacao das rotas da API do Omnichannel Sothis.')
    .setVersion('1.0.0')
    .addBearerAuth()
    .build();
  const swaggerDocument = SwaggerModule.createDocument(app, swaggerConfig);
  SwaggerModule.setup('docs', app, swaggerDocument, {
    jsonDocumentUrl: 'docs/openapi.json',
  });

  await app.listen(port);
  Logger.log(`Backend ouvindo na porta ${port}`, 'Bootstrap');
  Logger.log(`Swagger disponivel em /docs`, 'Bootstrap');
}

bootstrap();