<?php

namespace app\repository;

use app\model\EctMetaFacilities;
use app\model\EctMetaProcess;
use app\model\EctMetaRfidreader;

/**
 * 读卡器数据仓库
 * 封装 ect_meta_rfidreader / ect_meta_facilities / ect_meta_process 的联合查询
 */
class ReaderRepository extends BaseRepository
{
    public function __construct()
    {
        $this->model = new EctMetaRfidreader();
    }

    public static function new(): static
    {
        return new self();
    }

    /**
     * 通过读卡器编号查询读卡器所在步骤信息
     *
     * 联合查询路径：
     *   ect_meta_rfidreader.reader_no
     *     → ect_meta_facilities.reader_id
     *       → ect_meta_process.process_id
     *         → process_name（步骤名称）
     *
     * @param  string $readerNo 读卡器编号（大写）
     * @return array{readerId: string, readerType: string}|null
     *         readerId  = reader_id（读卡器ID）
     *         readerType = process_name（该读卡器所在步骤，如"清洗"）
     */
    public function findReaderInfo(string $readerNo): ?array
    {
        $readerNo = strtoupper($readerNo);

        $reader = EctMetaRfidreader::where('reader_no', $readerNo)
            ->select('reader_id')
            ->first();

        if ($reader === null) {
            return null;
        }

        $readerId = (string) $reader->reader_id;

        $facility = EctMetaFacilities::where('reader_id', $readerId)
            ->select('process_id')
            ->first();

        if ($facility === null) {
            return ['readerId' => $readerId, 'readerType' => ''];
        }

        $process = EctMetaProcess::where('process_id', $facility->process_id)
            ->select('process_name')
            ->first();

        $readerType = (string)$process?->process_name;

        return ['readerId' => $readerId, 'readerType' => $readerType];
    }
}