import { Controller, Get, Post, Body, Param, UseGuards, Headers, HttpException, HttpStatus } from '@nestjs/common';
import { ApiTags, ApiOperation, ApiBearerAuth, ApiResponse } from '@nestjs/swagger';
import { FiatWithdrawalApplicationService, RequestFiatWithdrawalCommand } from '@/application/services';
import { CurrentUser, CurrentUserPayload } from '@/shared/decorators';
import { JwtAuthGuard } from '@/shared/guards/jwt-auth.guard';
import {
  RequestFiatWithdrawalDTO,
  CancelFiatWithdrawalDTO,
} from '@/api/dto/request';
import { FiatWithdrawalResponseDTO, FiatWithdrawalListItemDTO } from '@/api/dto/response';
import { IdentityClientService } from '@/infrastructure/external/identity/identity-client.service';
import { PaymentMethod } from '@/domain/value-objects/fiat-withdrawal-status.enum';

@ApiTags('Fiat Withdrawal (法币提现)')
@Controller('wallet/fiat-withdrawal')
@UseGuards(JwtAuthGuard)
@ApiBearerAuth()
export class FiatWithdrawalController {
  constructor(
    private readonly fiatWithdrawalService: FiatWithdrawalApplicationService,
    private readonly identityClient: IdentityClientService,
  ) {}

  @Post('send-sms')
  @ApiOperation({ summary: '发送法币提现验证短信', description: '向用户手机发送法币提现验证码' })
  @ApiResponse({ status: 200, description: '发送成功' })
  async sendFiatWithdrawSms(
    @CurrentUser() user: CurrentUserPayload,
    @Headers('authorization') authHeader: string,
  ): Promise<{ message: string }> {
    const token = authHeader?.replace('Bearer ', '') || '';

    // 调用 identity-service 发送短信验证码
    await this.identityClient.sendWithdrawSmsCode(user.userId, token);
    return { message: '验证码已发送' };
  }

  @Post()
  @ApiOperation({ summary: '申请法币提现', description: '将绿积分提现到银行卡/支付宝/微信，需要短信验证和密码验证' })
  @ApiResponse({ status: 201, type: FiatWithdrawalResponseDTO })
  async requestFiatWithdrawal(
    @CurrentUser() user: CurrentUserPayload,
    @Body() dto: RequestFiatWithdrawalDTO,
    @Headers('authorization') authHeader: string,
  ): Promise<FiatWithdrawalResponseDTO> {
    const token = authHeader?.replace('Bearer ', '') || '';

    // 验证短信验证码
    if (!dto.smsCode) {
      throw new HttpException('请输入短信验证码', HttpStatus.BAD_REQUEST);
    }

    const isSmsValid = await this.identityClient.verifyWithdrawSmsCode(user.userId, dto.smsCode, token);
    if (!isSmsValid) {
      throw new HttpException('短信验证码错误，请重试', HttpStatus.BAD_REQUEST);
    }

    // 验证登录密码
    if (!dto.password) {
      throw new HttpException('请输入登录密码', HttpStatus.BAD_REQUEST);
    }

    const isPasswordValid = await this.identityClient.verifyPassword(user.userId, dto.password, token);
    if (!isPasswordValid) {
      throw new HttpException('登录密码错误，请重试', HttpStatus.BAD_REQUEST);
    }

    // 验证收款账户信息完整性
    this.validatePaymentAccount(dto);

    const command: RequestFiatWithdrawalCommand = {
      accountSequence: user.accountSequence,
      userId: user.userId,
      amount: dto.amount,
      paymentMethod: dto.paymentMethod,
      bankName: dto.bankName,
      bankCardNo: dto.bankCardNo,
      cardHolderName: dto.cardHolderName,
      alipayAccount: dto.alipayAccount,
      alipayRealName: dto.alipayRealName,
      wechatAccount: dto.wechatAccount,
      wechatRealName: dto.wechatRealName,
    };

    return this.fiatWithdrawalService.requestFiatWithdrawal(command);
  }

  @Post(':orderNo/cancel')
  @ApiOperation({ summary: '取消法币提现', description: '取消未审核的法币提现订单' })
  @ApiResponse({ status: 200, type: FiatWithdrawalListItemDTO })
  async cancelFiatWithdrawal(
    @CurrentUser() user: CurrentUserPayload,
    @Param('orderNo') orderNo: string,
    @Body() dto: CancelFiatWithdrawalDTO,
  ): Promise<FiatWithdrawalListItemDTO> {
    // TODO: 验证订单属于当前用户
    return this.fiatWithdrawalService.cancelFiatWithdrawal(orderNo, dto.reason);
  }

  @Get()
  @ApiOperation({ summary: '查询法币提现记录', description: '获取用户的法币提现订单列表' })
  @ApiResponse({ status: 200, type: [FiatWithdrawalListItemDTO] })
  async getFiatWithdrawals(
    @CurrentUser() user: CurrentUserPayload,
  ): Promise<FiatWithdrawalListItemDTO[]> {
    return this.fiatWithdrawalService.getFiatWithdrawals(user.userId);
  }

  /**
   * 验证收款账户信息完整性
   */
  private validatePaymentAccount(dto: RequestFiatWithdrawalDTO): void {
    switch (dto.paymentMethod) {
      case PaymentMethod.BANK_CARD:
        if (!dto.bankName || !dto.bankCardNo || !dto.cardHolderName) {
          throw new HttpException('请填写完整的银行卡信息', HttpStatus.BAD_REQUEST);
        }
        break;
      case PaymentMethod.ALIPAY:
        if (!dto.alipayAccount || !dto.alipayRealName) {
          throw new HttpException('请填写完整的支付宝信息', HttpStatus.BAD_REQUEST);
        }
        break;
      case PaymentMethod.WECHAT:
        if (!dto.wechatAccount || !dto.wechatRealName) {
          throw new HttpException('请填写完整的微信信息', HttpStatus.BAD_REQUEST);
        }
        break;
      default:
        throw new HttpException('不支持的收款方式', HttpStatus.BAD_REQUEST);
    }
  }
}