import {
  Controller,
  Get,
  Post,
  Patch,
  Body,
  Param,
  Query,
  UseGuards,
  Req,
  ParseUUIDPipe,
} from '@nestjs/common';
import { Request } from 'express';
import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
import { RolesGuard } from '../../common/guards/roles.guard';
import { Roles } from '../../common/decorators/roles.decorator';
import { UserRole } from '../users/entities/user.entity';
import { AdminDashboardService } from './services/admin-dashboard.service';
import { AdminProvidersService } from './services/admin-providers.service';
import { AdminPackagesService } from './services/admin-packages.service';
import { AdminPromotionsService } from './services/admin-promotions.service';
import { AdminModerationService } from './services/admin-moderation.service';
import { DashboardQueryDto, DashboardPeriod } from './dto/dashboard.dto';
import { UpdateProviderDto } from './dto/provider.dto';
import { CreatePackageDto, UpdatePackageDto } from './dto/package.dto';
import { CreatePromotionDto, UpdatePromotionDto, ValidatePromoCodeDto } from './dto/promotion.dto';
import { ApproveProductDto, RejectProductDto, ApproveReferralDto, RejectReferralDto } from './dto/moderation.dto';

interface AuthRequest extends Request {
  user: { id: string; role: string };
}

@Controller('admin')
@UseGuards(JwtAuthGuard, RolesGuard)
export class AdminController {
  constructor(
    private readonly dashboardService: AdminDashboardService,
    private readonly providersService: AdminProvidersService,
    private readonly packagesService: AdminPackagesService,
    private readonly promotionsService: AdminPromotionsService,
    private readonly moderationService: AdminModerationService,
  ) {}

  // Dashboard Endpoints

  @Get('dashboard')
  @Roles(UserRole.VIEWER)
  async getDashboard(@Query() query: DashboardQueryDto) {
    const startDate = query.startDate ? new Date(query.startDate) : undefined;
    const endDate = query.endDate ? new Date(query.endDate) : undefined;

    const metrics = await this.dashboardService.getDashboardMetrics(startDate, endDate);
    return { metrics };
  }

  @Get('dashboard/revenue-series')
  @Roles(UserRole.ADMIN)
  async getRevenueSeries(@Query() query: DashboardQueryDto) {
    const now = new Date();
    const startDate = query.startDate
      ? new Date(query.startDate)
      : new Date(now.getFullYear(), now.getMonth() - 1, 1);
    const endDate = query.endDate ? new Date(query.endDate) : now;
    const period = query.period || DashboardPeriod.DAY;

    const series = await this.dashboardService.getRevenueSeries(startDate, endDate, period);
    return { series };
  }

  // IA Providers Endpoints

  @Get('providers')
  @Roles(UserRole.ADMIN)
  async getProviders() {
    const providers = await this.providersService.findAll();
    return { providers };
  }

  @Patch('providers/:id')
  @Roles(UserRole.SUPER_ADMIN)
  async updateProvider(
    @Req() req: AuthRequest,
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: UpdateProviderDto,
  ) {
    const provider = await this.providersService.update(id, dto, req.user.id);
    return {
      message: 'Proveedor actualizado exitosamente',
      provider,
    };
  }

  // Credit Packages Endpoints

  @Get('packages')
  @Roles(UserRole.ADMIN)
  async getPackages(@Query('includeInactive') includeInactive?: string) {
    const packages = await this.packagesService.findAll(includeInactive === 'true');
    return { packages };
  }

  @Post('packages')
  @Roles(UserRole.ADMIN)
  async createPackage(@Req() req: AuthRequest, @Body() dto: CreatePackageDto) {
    const pkg = await this.packagesService.create(dto, req.user.id);
    return {
      message: 'Paquete creado exitosamente',
      package: pkg,
    };
  }

  @Patch('packages/:id')
  @Roles(UserRole.ADMIN)
  async updatePackage(
    @Req() req: AuthRequest,
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: UpdatePackageDto,
  ) {
    const pkg = await this.packagesService.update(id, dto, req.user.id);
    return {
      message: 'Paquete actualizado exitosamente',
      package: pkg,
    };
  }

  // Promotions Endpoints

  @Get('promotions')
  @Roles(UserRole.ADMIN)
  async getPromotions(@Query('includeExpired') includeExpired?: string) {
    const promotions = await this.promotionsService.findAll(includeExpired === 'true');
    return { promotions };
  }

  @Post('promotions')
  @Roles(UserRole.ADMIN)
  async createPromotion(@Req() req: AuthRequest, @Body() dto: CreatePromotionDto) {
    const promotion = await this.promotionsService.create(dto, req.user.id);
    return {
      message: 'Promocion creada exitosamente',
      promotion,
    };
  }

  @Patch('promotions/:id')
  @Roles(UserRole.ADMIN)
  async updatePromotion(
    @Req() req: AuthRequest,
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: UpdatePromotionDto,
  ) {
    const promotion = await this.promotionsService.update(id, dto, req.user.id);
    return {
      message: 'Promocion actualizada exitosamente',
      promotion,
    };
  }

  @Post('promotions/validate')
  @Roles(UserRole.VIEWER)
  async validatePromoCode(@Body() dto: ValidatePromoCodeDto) {
    return this.promotionsService.validateCode(dto.code, dto.packageId, dto.purchaseAmount);
  }

  // Product Moderation Endpoints

  @Get('products/pending')
  @Roles(UserRole.MODERATOR)
  async getPendingProducts(
    @Query('page') page?: string,
    @Query('limit') limit?: string,
  ) {
    return this.moderationService.getPendingProducts(
      page ? parseInt(page, 10) : 1,
      limit ? parseInt(limit, 10) : 20,
    );
  }

  @Post('products/:id/approve')
  @Roles(UserRole.MODERATOR)
  async approveProduct(
    @Req() req: AuthRequest,
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: ApproveProductDto,
  ) {
    const product = await this.moderationService.approveProduct(id, dto, req.user.id);
    return {
      message: 'Producto aprobado exitosamente',
      product,
    };
  }

  @Post('products/:id/reject')
  @Roles(UserRole.MODERATOR)
  async rejectProduct(
    @Req() req: AuthRequest,
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: RejectProductDto,
  ) {
    const product = await this.moderationService.rejectProduct(id, dto, req.user.id);
    return {
      message: 'Producto rechazado',
      product,
    };
  }

  // Referral Fraud Moderation Endpoints

  @Get('referrals/fraud-holds')
  @Roles(UserRole.MODERATOR)
  async getFraudHoldReferrals(
    @Query('page') page?: string,
    @Query('limit') limit?: string,
  ) {
    return this.moderationService.getFraudHoldReferrals(
      page ? parseInt(page, 10) : 1,
      limit ? parseInt(limit, 10) : 20,
    );
  }

  @Post('referrals/:id/approve')
  @Roles(UserRole.MODERATOR)
  async approveReferral(
    @Req() req: AuthRequest,
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: ApproveReferralDto,
  ) {
    const referral = await this.moderationService.approveReferral(id, dto, req.user.id);
    return {
      message: 'Referido aprobado exitosamente',
      referral,
    };
  }

  @Post('referrals/:id/reject')
  @Roles(UserRole.MODERATOR)
  async rejectReferral(
    @Req() req: AuthRequest,
    @Param('id', ParseUUIDPipe) id: string,
    @Body() dto: RejectReferralDto,
  ) {
    const referral = await this.moderationService.rejectReferral(id, dto, req.user.id);
    return {
      message: 'Referido rechazado por fraude',
      referral,
    };
  }
}