import { BadRequestException, Injectable, NotFoundException } from '@nestjs/common';
import { PrismaService } from '../../common/prisma/prisma.module';
import { RedeemService } from '../redeem/redeem.service';
import type {
  AdminRedeemDebugCreateTokenDto,
  AdminRedeemDebugStoreTokenDto,
} from './dto/admin-mutate.dto';

@Injectable()
export class AdminRedeemDebugService {
  constructor(
    private readonly prisma: PrismaService,
    private readonly redeemService: RedeemService,
  ) {}

  private parseId(value: string, label: string): bigint {
    const normalized = value?.trim();
    if (!normalized || !/^\d+$/.test(normalized)) {
      throw new BadRequestException(`${label}格式无效`);
    }
    return BigInt(normalized);
  }

  private async resolveStoreAccountId(storeId: string): Promise<bigint> {
    const account = await this.prisma.storeAccount.findFirst({
      where: { storeId: this.parseId(storeId, '门店 ID'), status: 'ACTIVE' },
      orderBy: { id: 'asc' },
      select: { id: true, store: { select: { name: true } } },
    });
    if (!account) {
      throw new NotFoundException('该门店无可用账户，请先创建门店账户');
    }
    return account.id;
  }

  async createToken(dto: AdminRedeemDebugCreateTokenDto) {
    return this.redeemService.createToken(this.parseId(dto.userId, '用户 ID'), {
      amount: dto.amount,
      couponId: dto.couponId,
      storeId: dto.storeId,
    });
  }

  async preview(dto: AdminRedeemDebugStoreTokenDto) {
    const storeAccountId = await this.resolveStoreAccountId(dto.storeId);
    return this.redeemService.previewRedeem(storeAccountId, dto.token);
  }

  async confirm(dto: AdminRedeemDebugStoreTokenDto) {
    const storeAccountId = await this.resolveStoreAccountId(dto.storeId);
    return this.redeemService.confirmRedeem(storeAccountId, { token: dto.token });
  }
}