<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Spatie\Activitylog\Traits\LogsActivity;
use Spatie\Activitylog\LogOptions;

class ProductionOrder extends Model
{
    use HasFactory, LogsActivity;

    protected $fillable = [
        'code',
        'product_id',
        'output_batch_number',
        'output_box_count',
        'output_quantity',
        'warehouse_id',
        'production_date',
        'expiry_date',
        'user_id',
        'status',
        'remark',
    ];

    protected $casts = [
        'production_date' => 'date:Y-m-d',
        'expiry_date' => 'date:Y-m-d',
        'output_quantity' => 'decimal:2',
    ];

    /**
     * 成品商品
     */
    public function product(): BelongsTo
    {
        return $this->belongsTo(Product::class);
    }

    /**
     * 入庫倉庫
     */
    public function warehouse(): BelongsTo
    {
        return $this->belongsTo(Warehouse::class);
    }

    /**
     * 操作人員
     */
    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    /**
     * 生產工單明細 (BOM)
     */
    public function items(): HasMany
    {
        return $this->hasMany(ProductionOrderItem::class);
    }

    /**
     * 活動日誌設定
     */
    public function getActivitylogOptions(): LogOptions
    {
        return LogOptions::defaults()
            ->logAll()
            ->logOnlyDirty()
            ->dontSubmitEmptyLogs();
    }

    /**
     * 活動日誌快照
     */
    public function tapActivity(\Spatie\Activitylog\Contracts\Activity $activity, string $eventName)
    {
        $properties = $activity->properties;
        $attributes = $properties['attributes'] ?? [];
        $snapshot = $properties['snapshot'] ?? [];

        // 快照關鍵名稱
        $snapshot['production_code'] = $this->code;
        $snapshot['product_name'] = $this->product ? $this->product->name : null;
        $snapshot['warehouse_name'] = $this->warehouse ? $this->warehouse->name : null;
        $snapshot['user_name'] = $this->user ? $this->user->name : null;

        $properties['attributes'] = $attributes;
        $properties['snapshot'] = $snapshot;
        $activity->properties = $properties;
    }

    /**
     * 產生生產單號
     */
    public static function generateCode(): string
    {
        $date = now()->format('Ymd');
        $prefix = "PRO-{$date}-";
        
        $lastOrder = static::where('code', 'like', "{$prefix}%")
            ->orderByDesc('code')
            ->first();

        if ($lastOrder) {
            $lastNumber = (int) substr($lastOrder->code, -3);
            $nextNumber = str_pad($lastNumber + 1, 3, '0', STR_PAD_LEFT);
        } else {
            $nextNumber = '001';
        }

        return $prefix . $nextNumber;
    }
}