import { Injectable, NotFoundException } from '@nestjs/common';
import { BaseCrudService } from '../common/base-crud.service.js';
import { PrismaService } from '../prisma/prisma.service.js';
import { TENANT_ADMIN_ROLE_CODE } from '../common/constants.js';
import { initTenant } from '../common/tenant-template.js';
import { CreateTenantDto, ListTenantQuery, UpdateTenantDto } from './dto.js';

@Injectable()
export class TenantsService extends BaseCrudService {
  constructor(prisma: PrismaService) {
    super(prisma, 'tenant');
  }

  /** 创建租户并初始化：根组织 + 租户管理员角色 + 管理员账号 + 资源 + 字典 + 授权。 */
  async createTenant(dto: CreateTenantDto) {
    const tenant = await this.create({
      code: dto.code,
      name: dto.name,
      status: dto.status ?? 'enabled',
      remark: dto.remark,
    });
    await initTenant({
      prisma: this.prisma.raw,
      tenantCode: dto.code,
      tenantName: dto.name,
      adminRoleCode: TENANT_ADMIN_ROLE_CODE,
      adminRoleName: '租户管理员',
      adminUsername: dto.adminUsername ?? 'admin',
      adminPassword: dto.adminPassword ?? 'Admin@123456',
      includePlatformPerms: false,
    });
    return tenant;
  }

  listTenants(q: ListTenantQuery) {
    const where: Record<string, unknown> = {};
    if (q.name) where.name = { contains: q.name };
    if (q.code) where.code = { contains: q.code };
    if (q.status) where.status = q.status;
    return this.paginate(q.page, q.pageSize, where);
  }

  async updateTenant(id: string, dto: UpdateTenantDto) {
    const existing = await this.findById(id);
    if (!existing) throw new NotFoundException('租户不存在');
    return this.update(id, { ...dto });
  }

  /** 删除租户并级联清理其全部业务数据。 */
  async removeTenant(id: string) {
    const existing = await this.findById(id);
    if (!existing) throw new NotFoundException('租户不存在');
    const code = existing.code;
    const db = this.prisma.raw;
    await db.$transaction([
      db.userRole.deleteMany({ where: { tenantCode: code } }),
      db.roleResource.deleteMany({ where: { tenantCode: code } }),
      db.roleOrg.deleteMany({ where: { tenantCode: code } }),
      db.refreshToken.deleteMany({ where: { tenantCode: code } }),
      db.loginLog.deleteMany({ where: { tenantCode: code } }),
      db.auditLog.deleteMany({ where: { tenantCode: code } }),
      db.config.deleteMany({ where: { tenantCode: code } }),
      db.dictItem.deleteMany({ where: { tenantCode: code } }),
      db.dictType.deleteMany({ where: { tenantCode: code } }),
      db.org.deleteMany({ where: { tenantCode: code } }),
      db.resource.deleteMany({ where: { tenantCode: code } }),
      db.role.deleteMany({ where: { tenantCode: code } }),
      db.user.deleteMany({ where: { tenantCode: code } }),
      db.tenant.delete({ where: { id } }),
    ]);
    return null;
  }
}