import { Injectable } from '@nestjs/common';
import { PrismaService } from '../../prisma/prisma.service';
import { Customer } from '../../prisma/generated/client';
import { CustomerCreateInput } from '../../prisma/generated/models/Customer';

/** Database access to customers. Rows are matched with Hiboutik by `hiboutikId`. */
@Injectable()
export class CustomerDatabaseRepository {
  constructor(private readonly prisma: PrismaService) {}

  async getAll(): Promise<Customer[]> {
    return this.prisma.customer.findMany({
      orderBy: { hiboutikId: 'asc' },
    });
  }

  /** Creates or updates the customer with the same `hiboutikId`. */
  async upsert(customer: CustomerCreateInput): Promise<Customer> {
    return this.prisma.customer.upsert({
      where: { hiboutikId: customer.hiboutikId },
      create: customer,
      update: customer,
    });
  }

  /**
   * Deletes the customers that no longer exist in Hiboutik.
   * Their addresses are deleted (onDelete: Cascade), their orders are kept with no customer (onDelete: SetNull).
   */
  async deleteMissing(keptHiboutikIds: number[]): Promise<number> {
    const result = await this.prisma.customer.deleteMany({
      where: { hiboutikId: { notIn: keptHiboutikIds } },
    });
    return result.count;
  }
}