<?php

declare(strict_types=1);

namespace App\Services;

use App\Models\Post;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Pagination\LengthAwarePaginator;

class SearchService
{
    protected CacheService $cacheService;

    public function __construct(CacheService $cacheService)
    {
        $this->cacheService = $cacheService;
    }

    public function searchPosts(string $query, array $filters = [], int $perPage = 10): LengthAwarePaginator
    {
        return $this->cacheService
            ->tags(['search', 'posts'])
            ->remember("posts:search:{$query}", function () use ($query, $filters, $perPage) {
                return Post::with(['author:id,name', 'category:id,name'])
                    ->where(function ($q) use ($query) {
                        $q->where('title', 'like', "%{$query}%")
                          ->orWhere('content', 'like', "%{$query}%")
                          ->orWhere('summary', 'like', "%{$query}%");
                    })
                    ->when(!empty($filters['category_id']), function ($q) use ($filters) {
                        $q->where('category_id', $filters['category_id']);
                    })
                    ->when(!empty($filters['author_id']), function ($q) use ($filters) {
                        $q->where('author_id', $filters['author_id']);
                    })
                    ->latest()
                    ->paginate($perPage);
            });
    }

    public function getRelatedPosts(Post $post, int $limit = 5): Collection
    {
        return $this->cacheService
            ->tags(['posts', 'related'])
            ->remember("posts:{$post->id}:related", function () use ($post, $limit) {
                return Post::where('category_id', $post->category_id)
                    ->where('id', '!=', $post->id)
                    ->take($limit)
                    ->latest()
                    ->get();
            });
    }
}