<?php

namespace Modules\ProjectManagement\Models;

use App\Traits\HasPublicIdentifier;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Modules\MasterData\Models\Material;

class TaskMaterial extends Model
{
    use HasPublicIdentifier;

    protected $fillable = [
        'task_id',
        'material_id',
        'planned_qty',
        'actual_qty',
        'unit_cost',
        'notes',
    ];

    protected function casts(): array
    {
        return [
            'planned_qty' => 'decimal:2',
            'actual_qty' => 'decimal:2',
            'unit_cost' => 'decimal:2',
        ];
    }

    public function task(): BelongsTo
    {
        return $this->belongsTo(Task::class);
    }

    public function material(): BelongsTo
    {
        return $this->belongsTo(Material::class);
    }


    public function getPlannedCostAttribute(): float
    {
        return (float) $this->planned_qty * (float) $this->unit_cost;
    }

    public function getActualCostAttribute(): float
    {
        return (float) $this->actual_qty * (float) $this->unit_cost;
    }

    public function getEffectiveCostAttribute(): float
    {
        return $this->actual_qty > 0 ? $this->actual_cost : $this->planned_cost;
    }

    public function getVarianceAttribute(): float
    {
        return $this->planned_cost - $this->actual_cost;
    }
}