<?php

declare(strict_types=1);

namespace App\Http\Controllers\Site;

use App\Http\Controllers\Controller;
use App\Models\AiModel;
use App\Models\Guide;
use App\Models\Tool;
use App\Support\MarkdownRenderer;
use Illuminate\Contracts\View\View;
use Illuminate\Http\Request;

class GuideController extends Controller
{
    public function __construct(
        private readonly MarkdownRenderer $markdownRenderer,
    ) {
    }

    public function index(Request $request): View
    {
        $builder = Guide::query()->published()->with('category');

        if ($request->filled('q')) {
            $builder->whereFullText(['title', 'excerpt', 'body'], (string) $request->string('q'));
        }

        if ($request->filled('difficulty')) {
            $builder->where('difficulty', (string) $request->string('difficulty'));
        }

        $difficultyCounts = Guide::query()
            ->published()
            ->selectRaw('difficulty, COUNT(*) as aggregate')
            ->groupBy('difficulty')
            ->pluck('aggregate', 'difficulty');

        $difficultyOptions = [
            ['value' => 'beginner', 'label' => '入门', 'count' => (int) ($difficultyCounts['beginner'] ?? 0)],
            ['value' => 'intermediate', 'label' => '进阶', 'count' => (int) ($difficultyCounts['intermediate'] ?? 0)],
            ['value' => 'advanced', 'label' => '高级', 'count' => (int) ($difficultyCounts['advanced'] ?? 0)],
        ];

        $guideStats = [
            'total' => Guide::query()->published()->count(),
            'beginner' => Guide::query()->published()->where('difficulty', 'beginner')->count(),
            'advanced' => Guide::query()->published()->where('difficulty', 'advanced')->count(),
            'updated_7d' => Guide::query()->published()->where('updated_at', '>=', now()->subDays(7))->count(),
        ];

        return view('public.guides.index', [
            'items' => $builder->latest('published_at')->paginate(15)->withQueryString(),
            'difficultyOptions' => $difficultyOptions,
            'guideStats' => $guideStats,
            'filters' => $request->only(['q', 'difficulty']),
            'sidebarTools' => Tool::published()->latest('published_at')->limit(6)->get(),
            'sidebarModels' => AiModel::published()->orderByDesc('total_score')->limit(6)->get(),
        ]);
    }

    public function byTopic(string $slug, Request $request): View
    {
        $request->merge(['difficulty' => $slug]);

        return $this->index($request);
    }

    public function show(string $slug): View
    {
        /** @var Guide $guide */
        $guide = Guide::query()
            ->published()
            ->with('category')
            ->where('slug', $slug)
            ->firstOrFail();

        return view('public.guides.show', [
            'item' => $guide,
            'bodyHtml' => $this->markdownRenderer->render($guide->body),
            'sidebarTools' => Tool::published()->latest('published_at')->limit(6)->get(),
            'sidebarModels' => AiModel::published()->orderByDesc('total_score')->limit(6)->get(),
        ]);
    }
}