<?php

namespace App\Http\Controllers;

use App\Models\Article;
use App\Models\ContentViewLog;
use App\Models\SiteSetting;
use Illuminate\Http\Request;

class ArticleController extends Controller
{
    public function index(Request $request)
    {
        $perPage = (int) SiteSetting::value('article_page_size', 10);
        $tagSlug = $request->query('tag');

        $query = Article::published()->orderByDesc('published_at');
        if ($tagSlug) {
            $query->whereHas('tags', function ($tagQuery) use ($tagSlug) {
                $tagQuery->where('slug', $tagSlug);
            });
        }

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

        return view('frontend.article.index', [
            'articles' => $articles,
            'tagSlug' => $tagSlug,
        ]);
    }

    public function show(string $slug, Request $request)
    {
        $article = Article::with('tags')->where('slug', $slug)->firstOrFail();

        $this->recordView($article, $request);

        $comments = $article->comments()
            ->where('status', 'approved')
            ->orderByDesc('created_at')
            ->get();

        $relatedArticles = Article::published()
            ->where('id', '!=', $article->id)
            ->whereHas('tags', function ($query) use ($article) {
                $query->whereIn('tags.id', $article->tags->pluck('id'));
            })
            ->orderByDesc('published_at')
            ->limit(6)
            ->get();

        return view('frontend.article.show', [
            'article' => $article,
            'comments' => $comments,
            'relatedArticles' => $relatedArticles,
        ]);
    }

    private function recordView(Article $article, Request $request): void
    {
        $ip = $request->ip() ?? '0.0.0.0';
        $userAgent = $request->userAgent() ?? 'unknown';
        $userAgentHash = sha1($userAgent);

        $log = ContentViewLog::firstOrCreate([
            'content_type' => 'article',
            'content_id' => $article->id,
            'ip' => $ip,
            'user_agent_hash' => $userAgentHash,
            'viewed_on' => now()->toDateString(),
        ]);

        if ($log->wasRecentlyCreated) {
            $article->increment('view_count');
        }
    }
}