<?php
/**
 *	文章控制器
 */
namespace app\index\controller;
use app\index\controller\Base;
use think\facade\Db;
use think\facade\View;
use think\facade\Request;

class Article extends Base
{
    // 文章列表页
    public function list()
    {
        // 获取分类ID
        $cateId = Request::param('cate/d', 0);

        // 构建查询条件
        $where = [
            ['delete_time', '=', null],
            ['status', '=', 1]
        ];

        if ($cateId > 0) {
            $where[] = ['cate', '=', $cateId];
        }

        // 获取文章列表
        $articles = Db::table('yz_article')
            ->where($where)
            ->order('id DESC')
            ->paginate([
                'list_rows' => 10,
                'query' => Request::instance()->param()
            ]);

        // 获取分类信息
        $category = null;
        if ($cateId > 0) {
            $category = Db::table('yz_article_category')
                ->where('id', $cateId)
                ->where('delete_time', null)
                ->where('status', 3)
                ->find();
        }

        // 获取所有分类
        $categories = Db::table('yz_article_category')
            ->where('delete_time', null)
            ->where('status', 3)
            ->select()
            ->toArray();

        // 将变量传递给视图
        View::assign([
            'articles' => $articles,
            'category' => $category,
            'categories' => $categories
        ]);

        return view('list');
    }

    // 文章详情页
    public function detail()
    {
        $id = Request::param('id/d', 0);
        $article = Db::table('yz_article')->where('id', $id)->find();
        
        if (!$article) {
            return json(['code' => 0, 'msg' => '文章不存在或已被删除']);
        }

        // 获取分类名称
        $cateName = Db::table('yz_article_category')
            ->where('id', $article['cate'])
            ->value('name');
        
        // 获取上一篇和下一篇文章
        $prevArticle = Db::table('yz_article')
            ->where('id', '<', $id)
            ->where('delete_time', null)
            ->where('status', '<>', 3)
            ->order('id DESC')
            ->find();
            
        $nextArticle = Db::table('yz_article')
            ->where('id', '>', $id)
            ->where('delete_time', null)
            ->where('status', '<>', 3)
            ->order('id ASC')
            ->find();
            
        // 获取相关文章（同分类的其他文章）
        $relatedArticles = Db::table('yz_article')
            ->alias('a')
            ->join('yz_article_category c', 'a.cate = c.id')
            ->where('a.cate', $article['cate'])
            ->where('a.id', '<>', $id)
            ->where('a.delete_time', null)
            ->where('a.status', '=', 2)
            ->field([
                'a.id',
                'a.title',
                'a.desc',
                'IF(a.image IS NULL OR a.image = "", c.image, a.image) as image'
            ])
            ->order('a.id DESC')
            ->limit(3)
            ->select()
            ->toArray();

        // 如果是 AJAX 请求，返回 JSON 数据
        if (Request::isAjax()) {
            return json([
                'code' => 1,
                'msg' => '获取成功',
                'data' => [
                    'article' => $article,
                    'cateName' => $cateName,
                    'prevArticle' => $prevArticle,
                    'nextArticle' => $nextArticle,
                    'relatedArticles' => $relatedArticles
                ]
            ]);
        }
            
        // 非 AJAX 请求返回视图
        View::assign([
            'article' => $article,
            'cateName' => $cateName,
            'prevArticle' => $prevArticle,
            'nextArticle' => $nextArticle,
            'relatedArticles' => $relatedArticles
        ]);

        return view('detail');
    }

    // 文章点赞
    public function like()
    {
        if (!Request::isAjax()) {
            return json(['code' => 0, 'msg' => '非法请求']);
        }

        $id = Request::param('id/d', 0);

        // 更新点赞数
        $result = Db::table('yz_article')
            ->where('id', $id)
            ->where('delete_time', null)
            ->inc('likes', 1)
            ->update();

        if ($result) {
            return json(['code' => 1, 'msg' => '点赞成功']);
        } else {
            return json(['code' => 0, 'msg' => '点赞失败']);
        }
    }

    // 提交评论
    public function comment()
    {
        if (!Request::isAjax() || !Request::isPost()) {
            return json(['code' => 0, 'msg' => '非法请求']);
        }

        $articleId = Request::param('article_id/d', 0);
        $content = Request::param('content/s', '');
        $parentId = Request::param('parent_id/d', 0);

        if (empty($content)) {
            return json(['code' => 0, 'msg' => '评论内容不能为空']);
        }

        // 检查文章是否存在
        $article = Db::table('yz_article')
            ->where('id', $articleId)
            ->where('delete_time', null)
            ->where('status', 3)
            ->find();

        if (!$article) {
            return json(['code' => 0, 'msg' => '文章不存在或已被删除']);
        }

        // 添加评论
        // $data = [
        //     'article_id' => $articleId,
        //     'content' => $content,
        //     'parent_id' => $parentId,
        //     'user_id' => $this->getUserId(),
        //     'user_name' => $this->getUserName(),
        //     'status' => 1,
        //     'create_time' => time()
        // ];

        // $result = Db::table('yz_article_comment')->insert($data);

        // if ($result) {
        //     return json(['code' => 1, 'msg' => '评论成功']);
        // } else {
        //     return json(['code' => 0, 'msg' => '评论失败']);
        // }
    }

    // 获取当前用户ID（示例方法，实际应根据您的用户系统实现）
    private function getUserId()
    {
        // 这里应该返回当前登录用户的ID
        return 1; // 示例返回值
    }

    // 获取当前用户名（示例方法，实际应根据您的用户系统实现）
    private function getUserName()
    {
        // 这里应该返回当前登录用户的用户名
        return '游客'; // 示例返回值
    }

    // 获取访问统计
    public function viewStats()
    {
        $id = Request::param('id/d', 0);
        
            
        // 获取总访问量
        $totalViews = Db::table('yz_article')
            ->where('id', $id)
            ->value('views');
            
        return json([
            'code' => 1,
            'data' => [
                'total' => $totalViews
            ]
        ]);
    }

    /**
     * 更新文章访问次数
     */
    public function updateViews()
    {
        if (!Request::isPost()) {
            return json(['code' => 0, 'msg' => '非法请求']);
        }

        $id = Request::post('id');
        if (!$id) {
            return json(['code' => 0, 'msg' => '参数错误']);
        }

        try {
            // 更新访问次数
            $article = Db::table('yz_article')->where('id', $id)->find();
            if (!$article) {
                return json(['code' => 0, 'msg' => '文章不存在']);
            }

            // 更新访问次数
            Db::table('yz_article')->where('id', $id)->inc('views')->update();
            
            // 获取更新后的访问次数
            $newViews = Db::table('yz_article')->where('id', $id)->value('views');
            
            return json(['code' => 1, 'msg' => '更新成功', 'data' => ['views' => $newViews]]);
        } catch (\Exception $e) {
            return json(['code' => 0, 'msg' => '更新失败：' . $e->getMessage()]);
        }
    }
}