<?php
namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class StockSection extends Model
{
    protected $table = 'stock_section';
    protected $primaryKey = 'section_id';
    public $timestamps = true;

    protected $fillable = [
        'section_symbol',
        'section_name',
        'position_id',
        'capacity',
        'retrievable'
    ];

    protected $appends = [
        'storage_address',
    ];

    public function position()
    {
        return $this->belongsTo(StockPosition::class, 'position_id', 'position_id');
    }

    // If you have a StockEntry model, you can set up a many-to-many via the pivot:
    public function entries()
    {
        return $this->belongsToMany(
            StockEntry::class,          // your entry model
            'stock_entries2section',    // pivot table
            'section_id',               // this modelʼs FK on pivot
            'entry_id'                  // other modelʼs FK on pivot
        )
            ->withPivot('count')
            ->withTimestamps();
    }

    public function occupied(): bool
    {
        return $this->entries()->exists();
    }


    public function getStorageAddressAttribute(): string
    {
        // calls your existing method, which will
        // loadMissing the relations if needed
        return $this->storageAddress();
    }

    public function storageAddress(): string
    {
        // eager-load the whole hierarchy if not already
        $this->loadMissing('position.shelf.rack.line.room');


        $position = $this->position;
        $shelf = $position->shelf;
        $rack  = $shelf->rack;
        $line  = $rack->line;
        $room  = $line->room;

        return sprintf(
            '%s-%s-%s-%s-%s-%s',
            $room->room_symbol,
            $line->line_symbol,
            $rack->rack_symbol,
            $shelf->shelf_symbol,
            $position->position_symbol,
            $this->section_symbol
        );

    }

}