<?php
declare (strict_types = 1);

namespace app\index\controller\Article;

use app\index\BaseController;
use app\model\Articles;
use app\model\ArticlesCategory;
use Symfony\Component\VarDumper\VarDumper;
use think\exception\ValidateException;
use think\facade\Request;
use think\facade\Session;
use think\response\Json;
use think\db\exception\DbException;

class ArticleController extends BaseController
{
    /**
     * 获取新闻中心顶部4篇文章
     * @return Json
     */
    public function getNewsCenterTop4(): Json
    {
        try {
            // 1. 查询新闻中心主分类
            $newsCenterCategory = ArticlesCategory::where('name', '新闻中心')
                ->where('delete_time', null)
                ->find();
            
            if (!$newsCenterCategory) {
                return json([
                    'code' => 200,
                    'msg' => 'success',
                    'list' => [],
                ]);
            }
            
            // 2. 获取新闻中心及其子分类的ID列表
            $mainCategoryId = $newsCenterCategory['id'];
            
            // 查询子分类
            $subCategories = ArticlesCategory::where('cid', $mainCategoryId)
                ->where('delete_time', null)
                ->column('id');
            
            // 合并主分类和子分类ID
            $categoryIds = array_merge([$mainCategoryId], $subCategories);
            
            if (empty($categoryIds)) {
                return json([
                    'code' => 200,
                    'msg' => 'success',
                    'list' => [],
                ]);
            }
            
            // 3. 查询符合条件的文章，按指定优先级排序，取最新4篇
            $articles = Articles::published()
                ->whereIn('cate', $categoryIds)
                ->order([
                    'recommend' => 'desc',
                    'publish_date' => 'desc',
                    'sort' => 'desc',
                    'id' => 'desc'
                ])
                ->field([
                    'id',
                    'title',
                    'content',
                    'publish_date',
                    'DAY(publish_date) AS `date`',
                    'DATE_FORMAT(publish_date, "%Y-%m") AS `month`',
                    'image',
                    'recommend'
                ])
                ->limit(4)
                ->select();
            
            // 4. 处理文章数据，去除HTML标签并生成desc字段
            foreach ($articles as &$article) {
                // 使用PHP的strip_tags函数去除HTML标签，然后截取前100个字符
                $article['desc'] = mb_substr(trim(strip_tags($article['content'])), 0, 100, 'UTF-8');
                // 移除原始content字段，减少返回数据大小
                unset($article['content']);
            }
            
            return json([
                'code' => 200,
                'msg' => 'success',
                'list' => $articles,
            ]);
        } catch (\Exception $e) {
            // 打印完整错误信息到日志
            $errorMsg = '错误信息：' . $e->getMessage() . ' | 错误行号：' . $e->getLine() . ' | 执行SQL：' . Articles::getLastSql();
            trace('新闻中心文章查询失败: ' . $errorMsg, 'error');
            return json([
                'code' => 500,
                'msg' => '新闻中心文章查询失败，请稍后重试',
                'list' => []
            ]);
        }
    }

    /**
     * 游客文章阅读量函数
     * @return Json
     */
    public function articleViews(): Json
    {
        $id = Request::param('id');
        if (!$id) {
            return json([
                'code' => 400,
                'msg' => '没有文章id',
                'list' => []
            ]);
        }

        try {
            $article = Articles::where('id', $id)->where('delete_time', null)->find();
            
            if (!$article) {
                return json([
                    'code' => 404,
                    'msg' => '文章不存在',
                    'list' => []
                ]);
            }

            $article->inc('views');
            $article->save();

            return json([
                'code' => 200,
                'msg' => '阅读量更新成功',
                'data' => [
                    'views' => $article->views
                ]
            ]);
        } catch (\Exception $e) {
            trace('阅读量更新失败: ' . $e->getMessage(), 'error');
            return json([
                'code' => 500,
                'msg' => '阅读量更新失败，请稍后重试',
                'list' => []
            ]);
        }
    }

    /**
     * 游客文章点赞函数
     * @return Json
     */
    public function articleLikes(): Json
    {
        $id = Request::param('id');
        if (!$id) {
            return json([
                'code' => 400,
                'msg' => '没有文章id',
                'list' => []
            ]);
        }

        try {
            $article = Articles::where('id', $id)->where('delete_time', null)->find();
            
            if (!$article) {
                return json([
                    'code' => 404,
                    'msg' => '文章不存在',
                    'list' => []
                ]);
            }

            $article->inc('likes');
            $article->save();

            return json([
                'code' => 200,
                'msg' => '点赞成功',
                'data' => [
                    'likes' => $article->likes
                ]
            ]);
        } catch (\Exception $e) {
            trace('点赞失败: ' . $e->getMessage(), 'error');
            return json([
                'code' => 500,
                'msg' => '点赞失败，请稍后重试',
                'list' => []
            ]);
        }
    }

    /**
     * 游客文章取消点赞函数
     * @return Json
     */
    public function articleUnlikes(): Json
    {
        $id = Request::param('id');
        if (!$id) {
            return json([
                'code' => 400,
                'msg' => '没有文章id',
                'list' => []
            ]);
        }

        try {
            $article = Articles::where('id', $id)->where('delete_time', null)->find();
            
            if (!$article) {
                return json([
                    'code' => 404,
                    'msg' => '文章不存在',
                    'list' => []
                ]);
            }   
            
            if ($article->likes <= 0) {
                return json([
                    'code' => 400,
                    'msg' => '文章点赞数为0，不能取消点赞',
                    'list' => []
                ]);
            }
            
            $article->dec('likes');
            $article->save();
            
            return json([
                'code' => 200,
                'msg' => '取消点赞成功',
                'data' => [
                    'likes' => $article->likes
                ]
            ]);
        } catch (\Exception $e) {
            trace('取消点赞失败: ' . $e->getMessage(), 'error');
            return json([
                'code' => 500,
                'msg' => '取消点赞失败，请稍后重试',
                'list' => []
            ]);
        }
    }
}