import { Injectable } from '@nestjs/common';
import { EntityManager, EntityRepository } from '@mikro-orm/postgresql';
import { FilterQuery } from '@mikro-orm/core';
import { Contact } from '../entities/contact.entity';
import { PaginatedResult } from 'src/common/interfaces/pagination.interface';
import { ContactScope, ContactStatusEnum } from '../interface/interface';

type FindContactsOpts = {
  page?: number;
  limit?: number;
  search?: string;
  orderBy?: string;
  order?: 'asc' | 'desc';
  status?: ContactStatusEnum;
  scope?: ContactScope;
  restaurantId?: string;
};

@Injectable()
export class ContactRepository extends EntityRepository<Contact> {
  constructor(readonly em: EntityManager) {
    super(em, Contact);
  }

  /**
   * Find contacts with pagination and optional filters.
   * Supports: search (subject/content/phone), status, ordering.
   */
  async findAllPaginated(opts: FindContactsOpts = {}): Promise<PaginatedResult<Contact>> {
    const { page = 1, limit = 10, search, scope, orderBy = 'createdAt', order = 'desc', status, restaurantId } = opts;

    const offset = (page - 1) * limit;

    const where: FilterQuery<Contact> = {};

    if (status) {
      where.status = status;
    }
    if (scope) {
      where.scope = scope;
    }
    if (restaurantId) {
      where.restaurant = restaurantId;
    }

    if (search) {
      const pattern = `%${search}%`;
      where.$or = [{ subject: { $ilike: pattern } }, { content: { $ilike: pattern } }, { phone: { $ilike: pattern } }];
    }

    const [data, total] = await this.findAndCount(where, {
      limit,
      offset,
      orderBy: { [orderBy]: order.toLowerCase() as 'asc' | 'desc' },
    });

    const totalPages = Math.ceil(total / limit);

    return {
      data,
      meta: {
        total,
        page,
        limit,
        totalPages,
      },
    };
  }
}