<?php
// +----------------------------------------------------------------------
// | YwxApp [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2026-2036 http://ywxapp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Author: ywxapp<admin@ywxapp.cn>
// +----------------------------------------------------------------------

declare(strict_types=1);

namespace addon\blog\controller;

use addon\blog\model\BlogArticle as ArticleModel;
use addon\blog\model\BlogCategory as CategoryModel;
use addon\blog\model\BlogComment as CommentModel;
use addon\blog\model\BlogTag as TagModel;
use think\facade\Cache;
use think\facade\View;
use think\facade\Request;


/**
 * Index 类
 *
 * @author ywxapp <admin@ywxapp.cn>
 */
class Index extends BlogFrontend
{
    
    public function initialize() {}


    /**
     * Summary of needLogin
     * @var array
     */
    protected $noNeedLogin = ['*'];
    /**
     * 网站首页
     */
    public function index()
    {
        // 尝试从缓存获取首页数据（v2 键：绕过旧版本可能残留的损坏缓存）
        $cacheKey = 'homepage_data_v2';
        $data     = Cache::get($cacheKey);
        // 判断缓存中的文章是否为空（兼容数组与模型集合对象）
        $articlesEmpty = true;
        if (! empty($data) && ! empty($data['articles'])) {
            $cachedArticles = $data['articles'];
            $articlesEmpty  = (is_object($cachedArticles) && method_exists($cachedArticles, 'isEmpty'))
                ? $cachedArticles->isEmpty()
                : (count($cachedArticles) === 0);
        }
        if (empty($data) || $articlesEmpty) {
            // 获取最新文章
            $articles = ArticleModel::with(['user', 'category', 'tags'])
                ->where('status', 1)
                ->order('create_at', 'desc')
                ->limit(10)
                ->select();

            // 获取热门文章
            $hotArticles = ArticleModel::with(['user', 'category'])
                ->where('status', 1)
                ->order('view_count', 'desc')
                ->limit(5)
                ->select();

            // 获取推荐文章（置顶+高赞）
            $recommendedArticles = ArticleModel::with(['user', 'category'])
                ->where('status', 1)
                ->where('is_top', 1)
                ->order('like_count', 'desc')
                ->limit(5)
                ->select();

            // 获取分类（公开站点展示全部分类）
            $categories = CategoryModel::withCount(['articles' => 
            function ($query, &$alias) {
                $query->where('status', 1);
                $alias = 'card_count';
            }])
                ->order('sort', 'asc')
                ->select();

            // 获取标签
            $tags = TagModel::withCount('articles')
                ->order('create_at', 'desc')
                ->limit(20)
                ->select();

            // 获取最新评论
            $latestComments = CommentModel::with(['user', 'article'])
                ->where('status', 1)
                ->order('create_at', 'desc')
                ->limit(5)
                ->select();
            $data = [
                'articles'            => $articles,
                'hotArticles'         => $hotArticles,
                'recommendedArticles' => $recommendedArticles,
                'categories'          => $categories,
                'tags'                => $tags,
                'latestComments'      => $latestComments,
            ];
            // 仅在存在文章时缓存，避免空结果被长期缓存挡住新数据
            if (! empty($articles) && ! $articles->isEmpty()) {
                Cache::set($cacheKey, $data, 3600);
            }
        }
        $this->view->assign('articles', $data['articles']);
        $this->view->assign('hotArticles', $data['hotArticles']);
        $this->view->assign('recommendedArticles', $data['recommendedArticles']);
        $this->view->assign('categories', $data['categories']);
        $this->view->assign('tags', $data['tags']);
        $this->view->assign('latestComments', $data['latestComments']);
        return $this->view->fetch('index/index');
    }

    /**
     * 分类文章列表（无 $id 时展示全部分类）
     */
    public function category($id = null)
    {
        if ($id === null) {
            $categories = CategoryModel::withCount(['articles' => 
            function ($query, &$alias) {
                $query->where('status', 1);
                $alias = 'card_count';
            }])->order('sort', 'asc')->select();
            return View::fetch('category/index', [
                'category'   => null,
                'categories' => $categories,
            ]);
        }

        $category = CategoryModel::find($id);
        if (! $category) {
            return $this->result->error('分类不存在');
        }

        $page     = Request::param('page', 1);
        $pageSize = 10;

        $articles = ArticleModel::with(['user', 'tags'])
            ->where('cid', $id)
            ->where('status', 1)
            ->order('create_at', 'desc')
            ->paginate([
                'list_rows' => $pageSize,
                'page'      => $page,
            ]);

        return View::fetch('category/index', [
            'category' => $category,
            'articles' => $articles,
        ]);
    }

    /**
     * 标签文章列表（无 $id 时展示全部标签）
     */
    public function tag($id = null)
    {
        if ($id === null) {
            $tags = TagModel::withCount('articles')->order('create_at', 'desc')->select();
            return View::fetch('tag/index', [
                'tag'  => null,
                'tags' => $tags,
            ]);
        }

        $tag = TagModel::find($id);
        if (! $tag) {
            return $this->result->error('标签不存在');
        }

        $page     = Request::param('page', 1);
        $pageSize = 10;

        $articles = $tag->articles()
            ->with(['user', 'category'])
            ->where('status', 1)
            ->order('create_at', 'desc')
            ->paginate([
                'list_rows' => $pageSize,
                'page'      => $page,
            ]);

        return View::fetch('tag/index', [
            'tag'      => $tag,
            'articles' => $articles,
        ]);
    }

    /**
     * 搜索页面
     */
    public function search()
    {
        $keyword = Request::param('keyword', '');
        if (empty($keyword)) {
            return $this->result->error('请输入搜索关键词');
        }

        $page     = Request::param('page', 1);
        $pageSize = 10;

        $articles = \addon\blog\service\BlogSearchService::search($keyword, (int) $page, $pageSize);

        return View::fetch('index/search', [
            'keyword'  => $keyword,
            'articles' => $articles,
        ]);
    }

    /**
     * 关于页面
     */
    public function about()
    {
        return View::fetch('index/about');
    }

    /**
     * 联系页面
     */
    public function contact()
    {
        return View::fetch('index/contact');
    }

    /**
     * 附近文章（GEO/LBS）
     */
    public function nearby()
    {
        $lat = (float) Request::param('lat', 0);
        $lng = (float) Request::param('lng', 0);
        $radius = (float) Request::param('radius', 10);
        $list = \addon\blog\service\BlogSearchService::nearby($lat, $lng, $radius, 30);
        $data = [];
        foreach ($list as $a) {
            $data[] = [
                'id'         => $a->id,
                'title'      => $a->title,
                'distance'   => isset($a->distance_km) ? round($a->distance_km, 2) : null,
                'category'   => $a->category ? $a->category->name : '',
                'url'        => url('blog/article/detail', ['id' => $a->id]),
            ];
        }
        if (Request::isAjax()) {
            return json(['code' => 1, 'data' => $data]);
        }
        return View::fetch('index/nearby', [
            'list'   => $data,
            'lat'    => $lat,
            'lng'    => $lng,
            'radius' => $radius,
        ]);
    }
}