<?php

declare(strict_types=1);

namespace Modules\RestaurantDelivery\Traits;

use Illuminate\Auth\Access\AuthorizationException;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Modules\Authentication\Models\Restaurant;

/**
 * HasRestaurant Trait
 *
 * Automatically scopes queries by restaurant_id for multi-restaurant setup.
 * Ensures that all records are linked to a restaurant and prevents cross-restaurant access.
 */
trait HasRestaurant
{
    /**
     * Boot the trait and add global scope
     */
    public static function bootHasRestaurant(): void
    {
        // Global scope: filter by current restaurant automatically
        static::addGlobalScope('restaurant', function (Builder $builder) {
            if (! config('restaurant-delivery.multi_restaurant.enabled', true)) {
                return;
            }

            $restaurantId = static::getCurrentRestaurantId();
            if ($restaurantId) {
                $builder->where($builder->getModel()->getTable().'.restaurant_id', $restaurantId);
            }
        });

        // Auto-set restaurant_id on creating
        static::creating(function ($model) {
            if (! config('restaurant-delivery.multi_restaurant.enabled', true)) {
                return;
            }

            if (empty($model->restaurant_id)) {
                $model->restaurant_id = static::getCurrentRestaurantId();
            }
        });
    }

    /**
     * Get current restaurant ID from helper, auth, session, or header
     */
    public static function getCurrentRestaurantId(): ?int
    {
        // 1️⃣ Helper function
        if (function_exists('getUserRestaurantId')) {
            $restaurantId = getUserRestaurantId();
            if ($restaurantId) {
                return (int) $restaurantId;
            }
        }

        // 2️⃣ Authenticated user
        if (auth()->check()) {
            $user = auth()->user();

            if (! empty($user->restaurant_id)) {
                return (int) $user->restaurant_id;
            }

            if (method_exists($user, 'getRestaurantId')) {
                return (int) $user->getRestaurantId();
            }

            if (method_exists($user, 'restaurant') && $user->restaurant) {
                return (int) $user->restaurant->id;
            }
        }

        // 3️⃣ Session
        if (session()->has('restaurant_id')) {
            return (int) session('restaurant_id');
        }

        // 4️⃣ Request header (API)
        if (request()->hasHeader('X-Restaurant-ID')) {
            return (int) request()->header('X-Restaurant-ID');
        }

        return null;
    }

    /**
     * Scope to remove restaurant filter (admin or global queries)
     */
    public function scopeWithoutRestaurant(Builder $query): Builder
    {
        return $query->withoutGlobalScope('restaurant');
    }

    /**
     * Scope to filter for a specific restaurant
     */
    public function scopeForRestaurant(Builder $query, int $restaurantId): Builder
    {
        return $query->withoutGlobalScope('restaurant')
            ->where($this->getTable().'.restaurant_id', $restaurantId);
    }

    /**
     * Relationship to the Restaurant model
     */
    public function restaurant(): BelongsTo
    {
        $restaurantModel = config(
            'restaurant-delivery.multi_restaurant.restaurant_model',
            Restaurant::class
        );

        return $this->belongsTo($restaurantModel, 'restaurant_id');
    }

    /**
     * Check if this record belongs to the current restaurant
     */
    public function belongsToCurrentRestaurant(): bool
    {
        $currentId = static::getCurrentRestaurantId();

        return $currentId && $this->restaurant_id === $currentId;
    }

    /**
     * Enforce that this record belongs to the current restaurant
     *
     * @throws AuthorizationException
     */
    public function ensureRestaurantOwnership(): void
    {
        if (! $this->belongsToCurrentRestaurant()) {
            throw new AuthorizationException('Access denied: record belongs to another restaurant.');
        }
    }

    /**
     * Helper to optionally auto-scope queries for a specific restaurant or all
     */
    public static function queryForRestaurant(?int $restaurantId = null): Builder
    {
        $builder = static::query();

        if ($restaurantId) {
            return $builder->forRestaurant($restaurantId);
        }

        return $builder;
    }
}