<?php

namespace App\Models;

use App\Helpers\Price;
use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;

class SparePart extends Model
{
    use SoftDeletes;

    const DEFAULT_SORT_BY = 'article';

    protected $fillable = [
        // БЕЗ year! Каталог общий для всех лет
        'article',
        'used_in_maf',
        'product_id',
        'note',
        'purchase_price',
        'customer_price',
        'expertise_price',
        'tsn_number',
        'pricing_code',
        'min_stock',
    ];

    protected $appends = [
        'purchase_price',
        'customer_price',
        'expertise_price',
        'purchase_price_txt',
        'customer_price_txt',
        'expertise_price_txt',
        'image',
        'quantity_without_docs',
        'quantity_with_docs',
        'total_quantity',
        'tsn_number_description',
        'pricing_code_description',
    ];

    // Аксессоры для цен (копейки -> рубли)
    protected function purchasePrice(): Attribute
    {
        return Attribute::make(
            get: fn($value) => $value ? $value / 100 : null,
            set: fn($value) => $value ? round($value * 100) : null,
        );
    }

    protected function customerPrice(): Attribute
    {
        return Attribute::make(
            get: fn($value) => $value ? $value / 100 : null,
            set: fn($value) => $value ? round($value * 100) : null,
        );
    }

    protected function expertisePrice(): Attribute
    {
        return Attribute::make(
            get: fn($value) => $value ? $value / 100 : null,
            set: fn($value) => $value ? round($value * 100) : null,
        );
    }

    // Текстовое представление цен
    protected function purchasePriceTxt(): Attribute
    {
        return Attribute::make(
            get: fn() => isset($this->attributes['purchase_price']) && $this->attributes['purchase_price'] !== null
                ? Price::format($this->attributes['purchase_price'] / 100)
                : '-',
        );
    }

    protected function customerPriceTxt(): Attribute
    {
        return Attribute::make(
            get: fn() => isset($this->attributes['customer_price']) && $this->attributes['customer_price'] !== null
                ? Price::format($this->attributes['customer_price'] / 100)
                : '-',
        );
    }

    protected function expertisePriceTxt(): Attribute
    {
        return Attribute::make(
            get: fn() => isset($this->attributes['expertise_price']) && $this->attributes['expertise_price'] !== null
                ? Price::format($this->attributes['expertise_price'] / 100)
                : '-',
        );
    }

    // Атрибут для картинки
    public function image(): Attribute
    {
        $path = '';
        if (file_exists(public_path() . '/images/spare_parts/' . $this->article . '.jpg')) {
            $path = url('/images/spare_parts/' . $this->article . '.jpg');
        }
        return Attribute::make(get: fn() => $path);
    }

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

    public function orders(): HasMany
    {
        return $this->hasMany(SparePartOrder::class);
    }

    public function reclamations(): BelongsToMany
    {
        return $this->belongsToMany(Reclamation::class, 'reclamation_spare_part')
            ->withPivot('quantity', 'with_documents')
            ->withTimestamps();
    }

    // ВЫЧИСЛЯЕМЫЕ ПОЛЯ (с учетом текущего года!)
    // Примечание: YearScope автоматически применяется к SparePartOrder,
    // поэтому явный фильтр по году НЕ нужен
    public function getQuantityWithoutDocsAttribute(): int
    {
        return (int) ($this->orders()
            ->where('status', SparePartOrder::STATUS_IN_STOCK)
            ->where('with_documents', false)
            ->sum('remaining_quantity') ?? 0);
    }

    public function getQuantityWithDocsAttribute(): int
    {
        return (int) ($this->orders()
            ->where('status', SparePartOrder::STATUS_IN_STOCK)
            ->where('with_documents', true)
            ->sum('remaining_quantity') ?? 0);
    }

    public function getTotalQuantityAttribute(): int
    {
        // Общее количество — сумма всех остатков на складе за текущий год,
        // независимо от наличия документов
        return (int) ($this->orders()
            ->where('status', SparePartOrder::STATUS_IN_STOCK)
            ->sum('remaining_quantity') ?? 0);
    }

    // Методы проверки
    public function hasCriticalShortage(): bool
    {
        return $this->quantity_without_docs < 0 || $this->quantity_with_docs < 0;
    }

    public function isBelowMinStock(): bool
    {
        return $this->total_quantity < $this->min_stock && $this->total_quantity >= 0;
    }

    // Расшифровки из справочника
    protected function tsnNumberDescription(): Attribute
    {
        return Attribute::make(
            get: fn() => PricingCode::getTsnDescription($this->tsn_number)
        );
    }

    protected function pricingCodeDescription(): Attribute
    {
        return Attribute::make(
            get: fn() => PricingCode::getPricingCodeDescription($this->pricing_code)
        );
    }
}