<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Http\Resources\ArticleCollectionResource;
use App\Http\Resources\ArticleResource;
use App\Models\Article;
use App\Models\ArticleAttachment;
use App\Support\DownloadFile;
use Illuminate\Http\Request;

class ArticleController extends Controller
{
    public function index(Request $request)
    {
        $query = Article::with(['categories', 'tags'])
            ->active()
            ->forAccessLevel()
            ->orderByDesc('is_pinned')
            ->orderByDesc('published_at');

        if ($request->filled('type')) {
            $query->byContentType($request->type);
        }

        if ($request->filled('category')) {
            $query->whereHas('categories', function ($q) use ($request) {
                $q->where('article_categories.slug', $request->category);
            });
        }

        if ($request->filled('tag')) {
            $query->whereHas('tags', function ($q) use ($request) {
                $q->where('article_tags.slug', $request->tag);
            });
        }

        if ($request->filled('search')) {
            $search = $request->search;
            $query->where(function ($q) use ($search) {
                $q->where('title', 'like', "%{$search}%")
                    ->orWhere('content', 'like', "%{$search}%");
            });
        }

        $articles = $query->paginate($request->integer('per_page', 12));

        return ArticleCollectionResource::collection($articles);
    }

    public function show(string $slug)
    {
        $article = Article::with(['categories', 'tags', 'attachments'])
            ->active()
            ->forAccessLevel()
            ->where('slug', $slug)
            ->firstOrFail();

        $article->incrementViewCount();

        // Get related articles (same content_type, excluding current)
        $related = Article::with(['categories'])
            ->active()
            ->forAccessLevel()
            ->where('content_type', $article->content_type)
            ->where('id', '!=', $article->id)
            ->orderByDesc('published_at')
            ->limit(4)
            ->get();

        return response()->json([
            'data' => new ArticleResource($article),
            'related' => ArticleCollectionResource::collection($related),
        ]);
    }

    public function downloadAttachment(string $slug, int $attachmentId)
    {
        $article = Article::active()
            ->forAccessLevel()
            ->where('slug', $slug)
            ->firstOrFail();

        $attachment = ArticleAttachment::where('article_id', $article->id)
            ->findOrFail($attachmentId);

        $attachment->incrementDownloadCount();

        return DownloadFile::fromDisk(
            disk: 'public',
            path: $attachment->file_path,
            downloadName: $attachment->original_filename
        );
    }
}