import {
  Controller,
  Get,
  Query,
  UseGuards,
  Request,
  ParseIntPipe,
  DefaultValuePipe,
} from '@nestjs/common';
import {
  ApiTags,
  ApiOperation,
  ApiResponse,
  ApiBearerAuth,
  ApiQuery,
} from '@nestjs/swagger';
import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
import { CreditsService } from './credits.service';
import { AuthenticatedRequest } from '../../common/interfaces/authenticated-request.interface';

@ApiTags('credits')
@ApiBearerAuth()
@UseGuards(JwtAuthGuard)
@Controller('credits')
export class CreditsController {
  constructor(private readonly creditsService: CreditsService) {}

  @Get('balance')
  @ApiOperation({ summary: 'Obtener balance de creditos' })
  @ApiResponse({ status: 200, description: 'Balance actual' })
  async getBalance(@Request() req: AuthenticatedRequest) {
    const balance = await this.creditsService.getBalance(req.user.id);
    return {
      balance: balance.balance,
      totalPurchased: balance.totalPurchased,
      totalConsumed: balance.totalConsumed,
      totalFromReferrals: balance.totalFromReferrals,
    };
  }

  @Get('transactions')
  @ApiOperation({ summary: 'Obtener historial de transacciones' })
  @ApiResponse({ status: 200, description: 'Lista de transacciones' })
  @ApiQuery({ name: 'page', required: false, type: Number })
  @ApiQuery({ name: 'limit', required: false, type: Number })
  async getTransactions(
    @Request() req: AuthenticatedRequest,
    @Query('page', new DefaultValuePipe(1), ParseIntPipe) page: number,
    @Query('limit', new DefaultValuePipe(20), ParseIntPipe) limit: number,
  ) {
    const { transactions, total } = await this.creditsService.getTransactions(
      req.user.id,
      page,
      Math.min(limit, 100),
    );

    return {
      transactions,
      total,
      page,
      limit,
      hasMore: page * limit < total,
    };
  }

  @Get('packages')
  @ApiOperation({ summary: 'Obtener paquetes de creditos disponibles' })
  @ApiResponse({ status: 200, description: 'Lista de paquetes' })
  async getPackages() {
    return this.creditsService.getPackages();
  }
}