<?php

namespace App\Http\Controllers\Api\Client\Docs;

use App\Http\Controllers\Controller;
use App\Http\Resources\Api\PostResource;
use App\Models\Post;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class PostController extends Controller
{
    public function index(Request $request): JsonResponse
    {
        $perPage = min((int) $request->get('per_page', 12), 50);

        $query = Post::query()
            ->published()
            ->with('category')
            ->whereHas('category', fn ($q) => $q->where('status', 'active'))
            ->when(
                $request->filled('keyword'),
                fn ($q) => $q->where(function ($subQuery) use ($request) {
                    $keyword = $request->string('keyword')->toString();
                    $subQuery
                        ->where('title', 'like', "%{$keyword}%")
                        ->orWhere('excerpt', 'like', "%{$keyword}%")
                        ->orWhere('content', 'like', "%{$keyword}%");
                })
            )
            ->when(
                $request->filled('category_slug'),
                fn ($q) => $q->whereHas('category', fn ($subQuery) => $subQuery->where('slug', $request->string('category_slug')->toString()))
            )
            ->orderByDesc('is_featured')
            ->orderByDesc('published_at')
            ->orderByDesc('id');

        $paginator = $query->paginate($perPage);

        return response()->json([
            'error' => false,
            'data' => [
                'items' => PostResource::collection($paginator->items()),
                'total' => $paginator->total(),
                'per_page' => $paginator->perPage(),
                'current_page' => $paginator->currentPage(),
                'last_page' => $paginator->lastPage(),
            ],
        ]);
    }

    public function featured(): JsonResponse
    {
        $posts = Post::query()
            ->published()
            ->with('category')
            ->where('is_featured', true)
            ->whereHas('category', fn ($q) => $q->where('status', 'active'))
            ->orderByDesc('published_at')
            ->limit(6)
            ->get();

        return response()->json([
            'error' => false,
            'data' => PostResource::collection($posts),
        ]);
    }

    public function show(string $slug): JsonResponse
    {
        $post = Post::query()
            ->published()
            ->with('category')
            ->where('slug', $slug)
            ->whereHas('category', fn ($q) => $q->where('status', 'active'))
            ->first();

        if (!$post) {
            return response()->json(['error' => true, 'message' => 'Không tìm thấy bài viết.'], 404);
        }

        $post->increment('view_count');
        $post->refresh();

        $post->setRelation('related_posts', Post::query()
            ->published()
            ->with('category')
            ->where('post_category_id', $post->post_category_id)
            ->where('id', '!=', $post->id)
            ->orderByDesc('published_at')
            ->limit(4)
            ->get());

        return response()->json([
            'error' => false,
            'data' => new PostResource($post),
        ]);
    }
}