<?php

namespace app\common\model;

use support\Model;

/**
 * 物品库存变化记录模型
 */
class InvStockLog extends Model
{
    protected $table = 'inv_stock_log';

    protected $fillable = [
        'company_id',
        'item_id',
        'item_name_snap',
        'change_type',
        'change_qty',
        'before_qty',
        'after_qty',
        'biz_type',
        'biz_no',
        'operator_id',
        'operator_name',
        'remark',
        'updated_at',
        'created_at',
    ];

    /**
     * Indicates if the model should be timestamped.
     *
     * @var bool
     */
    public $timestamps = true;


    protected $dateFormat = 'U';

    public const CHANGE_TYPE_IN = 1;           // 入库
    public const CHANGE_TYPE_OUT_CLAIM = 2;     // 出库（领用）
    public const CHANGE_TYPE_OUT_LOSS = 3;      // 出库（损耗）
    public const CHANGE_TYPE_IN_RETURN = 4;      // 入库（归还）

    public const BIZ_TYPE_PURCHASE = 1;         // 采购入库
    public const BIZ_TYPE_QR_CLAIM = 2;        // 扫码领取
    public const BIZ_TYPE_PROXY_CLAIM = 3;       // 管理员代领
    public const BIZ_TYPE_NORMAL_CLAIM = 4;      // 正常领用（审批后）
    public const BIZ_TYPE_RETURN = 5;            // 归还入库
    public const BIZ_TYPE_LOSS = 6;             // 损耗出库

    /**
     * 变动类型文本
     */
    public static function getChangeTypeText($type)
    {
        return [
            self::CHANGE_TYPE_IN => '入库',
            self::CHANGE_TYPE_OUT_CLAIM => '出库（领用）',
            self::CHANGE_TYPE_OUT_LOSS => '出库（损耗）',
            self::CHANGE_TYPE_IN_RETURN => '入库（归还）',
        ][$type] ?? '未知';
    }

    /**
     * 业务类型文本
     */
    public static function getBizTypeText($type)
    {
        return [
            self::BIZ_TYPE_PURCHASE => '采购入库',
            self::BIZ_TYPE_QR_CLAIM => '扫码领取',
            self::BIZ_TYPE_PROXY_CLAIM => '管理员代领',
            self::BIZ_TYPE_NORMAL_CLAIM => '正常领用',
            self::BIZ_TYPE_RETURN => '归还入库',
            self::BIZ_TYPE_LOSS => '损耗出库',
        ][$type] ?? '未知';
    }

    /**
     * 关联物品
     */
    public function item()
    {
        return $this->belongsTo(InvItem::class, 'item_id', 'id');
    }
}