<?php

namespace Modules\Maintenance\Models;

use App\Business;
use App\Contact;
use App\Product;
use App\Variation;
use Illuminate\Database\Eloquent\Model;

class MaterialLine extends Model
{
    protected $table = 'maintenance_material_lines';

    protected $fillable = [
        'material_list_id',
        'business_id',
        'line_type',
        'spare_part_id',
        'product_id',
        'variation_id',
        'part_name',
        'part_number',
        'quantity_required',
        'quantity_fulfilled',
        'unit',
        'status',
        'suggested_supplier_id',
        'notes',
    ];

    protected $casts = [
        'quantity_required' => 'decimal:3',
        'quantity_fulfilled' => 'decimal:3',
    ];

    public function materialList()
    {
        return $this->belongsTo(MaterialList::class, 'material_list_id');
    }

    public function business()
    {
        return $this->belongsTo(Business::class);
    }

    public function sparePart()
    {
        return $this->belongsTo(SparePart::class, 'spare_part_id');
    }

    public function product()
    {
        return $this->belongsTo(Product::class);
    }

    public function variation()
    {
        return $this->belongsTo(Variation::class);
    }

    public function suggestedSupplier()
    {
        return $this->belongsTo(Contact::class, 'suggested_supplier_id');
    }

    public function procurements()
    {
        return $this->hasMany(MaterialProcurement::class, 'material_line_id');
    }

    public function repairDispatches()
    {
        return $this->hasMany(RepairDispatch::class, 'material_line_id');
    }

    public function activeRepairDispatch()
    {
        return $this->hasOne(RepairDispatch::class, 'material_line_id')
            ->whereNotIn('status', ['received', 'cancelled'])
            ->latest('id');
    }

    public function isRepairLine(): bool
    {
        return $this->line_type === 'repair';
    }

    public function displayName(): string
    {
        if ($this->sparePart) {
            return $this->sparePart->name;
        }

        return $this->part_name ?: '—';
    }

    public function shortfall(): float
    {
        return max(0, (float) $this->quantity_required - (float) $this->quantity_fulfilled);
    }
}