<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

/**
 * 门店对账单模型（门店自助生成，快照回款周期：settlement_date = period_end + payment_cycle_days）
 */
class StatementModel extends Model
{
    /** 状态：待对账 */
    public const STATUS_PENDING = 0;
    /** 状态：已对账 */
    public const STATUS_RECONCILED = 1;
    /** 状态：已结算 */
    public const STATUS_SETTLED = 2;

    protected $table = 'statement';
    protected $primaryKey = 'id';

    protected $fillable = [
        'statement_no',
        'store_id',
        'period_start',
        'period_end',
        'total_amount',
        'payment_cycle_days',
        'settlement_date',
        'status',
        'reconciled_at',
        'settled_at',
        'remark',
    ];

    protected $casts = [
        'store_id' => 'integer',
        'period_start' => 'date:Y-m-d',
        'period_end' => 'date:Y-m-d',
        'total_amount' => 'decimal:2',
        'payment_cycle_days' => 'integer',
        'settlement_date' => 'date:Y-m-d',
        'status' => 'integer',
        'reconciled_at' => 'datetime',
        'settled_at' => 'datetime',
    ];

    /**
     * 所属门店
     */
    public function store(): BelongsTo
    {
        return $this->belongsTo(StoreModel::class, 'store_id', 'id');
    }

    /**
     * 对账单明细
     */
    public function items(): HasMany
    {
        return $this->hasMany(StatementItemModel::class, 'statement_id', 'id');
    }
}