import { NestFactory } from '@nestjs/core';
import { Module, Controller, Get, Post, Body, Param, ParseIntPipe, NotFoundException, BadRequestException } from '@nestjs/common';
import { PrismaService } from './prisma.service';
import 'dotenv/config';
import * as bcrypt from 'bcrypt';

@Controller()
class AppController {
  @Get()
  getHello(): string {
    return 'Travel Planning API is running!';
  }
}

@Controller('v1/auth')
class AuthController {
  constructor(private prisma: PrismaService) {}

  @Post('signup')
  async signup(@Body() body: any) {
    const { email, password, name } = body;
    
    // 1. Kiểm tra email tồn tại
    const existingUser = await this.prisma.user.findUnique({ where: { email } });
    if (existingUser) throw new BadRequestException('Email đã được sử dụng');

    // 2. Logic "First User is Admin"
    const userCount = await this.prisma.user.count();
    const shouldBeAdmin = userCount === 0;

    // 3. Hash mật khẩu
    const passwordHash = await bcrypt.hash(password, 10);

    return this.prisma.user.create({
      data: { email, passwordHash, name, isAdmin: shouldBeAdmin },
      select: { id: true, email: true, name: true, isAdmin: true }
    });
  }
}

@Controller('v1/tours')
class TourController {
  constructor(private prisma: PrismaService) {}

  @Get('explore')
  async getPublicTours() {
    // Lấy các tour có ít nhất 1 ảnh và thông tin vị trí từ chặng đầu tiên
    return this.prisma.tour.findMany({
      take: 20,
      include: {
        photos: { take: 1 },
        legs: {
          take: 1,
          include: {
            places: { take: 1 }
          }
        }
      }
    });
  }

  @Get(':id')
  async getTourDetails(@Param('id', ParseIntPipe) id: number) {
    const tour = await this.prisma.tour.findUnique({
      where: { id },
      include: {
        members: true,
        photos: true,
        legs: {
          orderBy: { sequenceNumber: 'asc' },
          include: {
            places: { orderBy: { sequenceInLeg: 'asc' } },
            expenses: true,
          },
        },
      },
    });

    if (!tour) throw new NotFoundException(`Không tìm thấy Tour với ID ${id}`);
    return tour;
  }
}

@Module({ 
  controllers: [AppController, AuthController, TourController], 
  providers: [PrismaService], 
  exports: [PrismaService] 
})
class AppModule {}

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  app.enableCors(); // Cho phép Frontend gọi API
  app.setGlobalPrefix('api'); // Tất cả API sẽ bắt đầu bằng /api/...
  
  const port = process.env.PORT || 3001;
  await app.listen(port);
  console.log(`🚀 Server is running on: http://localhost:${port}`);
}
bootstrap();