<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class MasterParameter extends Model
{
    use HasFactory;

    protected $fillable = [
        'parameter_code',
        'parameter_name',
        'default_value',
        'unit',
        'description',
    ];

    protected $casts = [
        'default_value' => 'decimal:6',
    ];

    /**
     * Relationship to FormulaParameter
     */
    public function formulaParameters()
    {
        return $this->hasMany(FormulaParameter::class, 'parameter_id');
    }

    /**
     * Relationship to MasterFormula through FormulaParameter
     */
    public function formulas()
    {
        return $this->belongsToMany(MasterFormula::class, 'formula_parameters', 'parameter_id', 'formula_id');
    }

    /**
     * Scope untuk mencari berdasarkan parameter code
     */
    public function scopeByCode($query, $code)
    {
        return $query->where('parameter_code', $code);
    }

    /**
     * Method untuk mendapatkan nilai parameter dengan fallback ke default
     */
    public function getValue($customValue = null)
    {
        return $customValue !== null ? $customValue : $this->default_value;
    }
}