<?php

declare(strict_types=1);

namespace App\Repositories;

use App\Models\Product;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;

class ProductRepository extends BaseRepository implements ProductRepositoryInterface
{
    public function __construct(Product $model)
    {
        parent::__construct($model);
    }

    /**
     * Get paginated products with filters
     */
    public function paginate(int $perPage = 15, array $filters = []): LengthAwarePaginator
    {
        $query = $this->model->newQuery()->with(['fournisseur', 'category']);

        // Apply filters
        if (!empty($filters['search'])) {
            $query->where(function ($q) use ($filters) {
                $q->where('nom', 'like', '%' . $filters['search'] . '%')
                  ->orWhere('reference', 'like', '%' . $filters['search'] . '%')
                  ->orWhere('fabricant', 'like', '%' . $filters['search'] . '%');
            });
        }

        if (!empty($filters['categorie'])) {
            $query->where('categorie_id', $filters['categorie']);
        }

        if (!empty($filters['fournisseur_id'])) {
            $query->where('fournisseur_id', $filters['fournisseur_id']);
        }

        if (isset($filters['low_stock'])) {
            $query->whereRaw('stock_actuel <= stock_minimum');
        }

        if (isset($filters['expiring_soon'])) {
            $query->where('date_expiration', '<=', now()->addDays(30)->toDateString())
                  ->where('date_expiration', '>=', now()->toDateString());
        }

        // Apply sorting
        $sortField = $filters['sort_by'] ?? 'created_at';
        $sortDirection = $filters['sort_direction'] ?? 'desc';
        $query->orderBy($sortField, $sortDirection);

        return $query->paginate($perPage);
    }

    /**
     * Get products with low stock
     */
    public function getLowStockProducts(int $perPage = 15): LengthAwarePaginator
    {
        return $this->model->newQuery()
            ->with(['fournisseur', 'category'])
            ->whereRaw('stock_actuel <= stock_minimum')
            ->orderBy('stock_actuel', 'asc')
            ->paginate($perPage);
    }

    /**
     * Search products by name
     */
    public function searchByName(string $name, int $perPage = 15, bool $exactMatch = false)
    {
        $query = $this->model->newQuery()->with(['fournisseur', 'category']);

        if ($exactMatch) {
            $query->where('nom', $name);
        } else {
            $query->where('nom', 'like', '%' . $name . '%');
        }

        return $query->paginate($perPage);
    }

    /**
     * Get products by category
     */
    public function getByCategory(int $categoryId, int $perPage = 15): LengthAwarePaginator
    {
        return $this->model->newQuery()
            ->with(['fournisseur', 'category'])
            ->where('categorie_id', $categoryId)
            ->orderBy('nom')
            ->paginate($perPage);
    }

    /**
     * Get products by fournisseur
     */
    public function getProductsByFournisseur(int $fournisseurId): LengthAwarePaginator
    {
        return $this->model->newQuery()
            ->where('fournisseur_id', $fournisseurId)
            ->orderBy('nom')
            ->paginate(15);
    }

    /**
     * Update stock quantity
     */
    public function updateStock(int $productId, float $newQuantity): bool
    {
        return $this->model->where('id', $productId)
            ->update(['stock_actuel' => $newQuantity]) > 0;
    }

    /**
     * Get product statistics
     */
    public function getStatistics(): array
    {
        $totalProducts = $this->model->count();
        $lowStockProducts = $this->model->whereRaw('stock_actuel <= stock_minimum')->count();
        $expiringProducts = $this->model->where('date_expiration', '<=', now()->addDays(30)->toDateString())
            ->where('date_expiration', '>=', now()->toDateString())
            ->count();
        $totalValue = $this->model->sum(\DB::raw('stock_actuel * prix_unitaire'));

        return [
            'total_products' => $totalProducts,
            'low_stock_products' => $lowStockProducts,
            'expiring_products' => $expiringProducts,
            'total_value' => $totalValue,
        ];
    }
}