import { Inject, Injectable } from '@nestjs/common';

import type { CustomerDirectory } from '../../common/security/scope/customer-directory';
import type { PrismaService } from '../../infra/prisma/prisma.service';
import { PRISMA } from '../../infra/tokens';

/**
 * 真实客户目录（A3 替换 A2 的 EmptyCustomerDirectory）。
 * 只读，供 ScopeResolver 解析六类数据范围；不参与业务写操作。
 */
@Injectable()
export class PrismaCustomerDirectory implements CustomerDirectory {
  constructor(@Inject(PRISMA) private readonly prisma: PrismaService) {}

  async findOwnedCustomerIds(userId: string): Promise<string[]> {
    const rows = await this.prisma.customer.findMany({
      where: { ownerUserId: userId, deletedAt: null },
      select: { id: true },
    });
    return rows.map((row) => row.id);
  }

  async findCustomerGroupCustomerIds(customerGroupIds: readonly string[]): Promise<string[]> {
    if (customerGroupIds.length === 0) return [];
    const rows = await this.prisma.customerGroupMember.findMany({
      where: { groupId: { in: [...customerGroupIds] }, customer: { deletedAt: null } },
      select: { customerId: true },
    });
    return [...new Set(rows.map((row) => row.customerId))].sort();
  }

  async findDepartmentCustomerIds(departmentIds: readonly string[]): Promise<string[]> {
    if (departmentIds.length === 0) return [];
    const rows = await this.prisma.customer.findMany({
      where: {
        deletedAt: null,
        owner: { departmentId: { in: [...departmentIds] } },
      },
      select: { id: true },
    });
    return rows.map((row) => row.id);
  }

  async findCreatedCustomerIds(userId: string): Promise<string[]> {
    const rows = await this.prisma.customer.findMany({
      where: { createdBy: userId, deletedAt: null },
      select: { id: true },
    });
    return rows.map((row) => row.id);
  }
}