<?php
/**
 *	文章控制器
 */
namespace app\index\controller;
use app\index\controller\BaseController;
use app\index\model\Users;
use think\facade\Db;
use think\facade\View;
use think\facade\Request;
use app\index\model\Articles\Articles;
use app\index\model\Articles\ArticlesCategory;
use app\index\model\Authors\Authors;
use app\index\model\Resources\Resources;

class ArticlesController extends BaseController
{
    //文章中心
    public function index()
    {
        // 获取前端传来的分类ID
        $cateid = input('cateid/d', 0); // 使用input助手函数获取参数，并转换为整数
        $page = input('page/d', 1);
        $limit = input('limit/d', 10);

        // 获取所有顶级分类
        $categories = ArticlesCategory::where('cid', 0)
            ->where('delete_time', null)
            ->where('status', 1)
            ->select()
            ->toArray();

        // 获取顶级分类信息
        $category = null;
        if ($cateid > 0) {
            $category = ArticlesCategory::where('id', $cateid)
                ->where('delete_time', null)
                ->where('status', 1)
                ->find();
        }

        // 获取所有子分类
        $subCategories = [];
        if ($cateid > 0) {
            $subCategories = ArticlesCategory::where('cid', $cateid)
                ->where('delete_time', null)
                ->where('status', 1)
                ->select()
                ->toArray();
        }

        // 获取所有子分类ID
        $subCategoryIds = array_column($subCategories, 'id');
        if ($cateid > 0) {
            $subCategoryIds[] = $cateid;
        }

        // 构建文章查询条件
        $where = [
            ['delete_time', '=', null],
            ['status', '=', 2]
        ];

        if (!empty($subCategoryIds)) {
            $where[] = ['cate', 'in', $subCategoryIds];
        }

        // 查询文章
        $articles = Articles::where($where)
            ->order('id DESC')
            ->page($page, $limit)
            ->select()
            ->toArray();

        // 按子分类分组文章
        $groupedArticles = [];
        foreach ($subCategories as $subCategory) {
            $groupedArticles[$subCategory['id']] = [
                'id' => $subCategory['id'],
                'name' => $subCategory['name'],
                'desc' => $subCategory['desc'],
                'image' => $subCategory['image'],
                'list' => []
            ];
        }

        // 将文章分配到对应的子分类
        foreach ($articles as $article) {
            if (isset($groupedArticles[$article['cate']])) {
                // 如果文章图片为空，使用分类图片
                if (empty($article['image'])) {
                    $article['image'] = $groupedArticles[$article['cate']]['image'];
                }
                $groupedArticles[$article['cate']]['list'][] = $article;
            }
        }

        // 获取总数
        $total = Articles::where($where)->count();

        // 准备返回数据
        $data = [
            'cate' => [
                'id' => $cateid,
                'name' => $category ? $category['name'] : '',
                'desc' => $category ? $category['desc'] : '',
                'image' => $category ? $category['image'] : '',
                'subCategories' => array_values($groupedArticles),
                'total' => $total,
                'page' => $page,
                'limit' => $limit
            ]
        ];

        // 根据请求方式返回不同的输出
        if (request()->isPost()) {
            return json([
                'code' => 1,
                'msg' => '获取成功',
                'data' => $data
            ]);
        } else {
            // 为视图准备数据
            $viewData = [
                'categories' => $categories,
                'cate' => $data['cate']
            ];
            return view('index', $viewData);
        }
    }

    // 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 = [
            ['a.delete_time', '=', null],
            ['a.status', '=', 2]
        ];

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

        // 获取文章列表
        $articles = Articles::alias('a')
            ->join('articles_category c', 'a.cate = c.id')
            ->where($where)
            ->field([
                'a.*',
                'IF(a.image IS NULL OR a.image = "", c.image, a.image) as image'
            ])
            ->order('a.id DESC')
            ->paginate([
                'list_rows' => 10,
                'query' => Request::instance()->param()
            ]);

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

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

        // 根据请求方式返回不同的输出
        if (request()->isPost()) {
            return json([
                'code' => 1,
                'msg' => '获取成功',
                'data' => [
                    'articles' => $articles->items(),
                    'category' => $category,
                    'categories' => $categories,
                    'total' => $articles->total(),
                    'current_page' => $articles->currentPage(),
                    'per_page' => $articles->listRows()
                ]
            ]);
        } else {
            // 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 = Articles::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 = ArticlesCategory::where('id', $article['cate'])
            ->value('name');

        // 获取作者信息
        $authorInfo = Users::where('name', $article['author'])->find();
        if ($authorInfo) {
            // 统计作者的文章数
            $articleCount = Articles::where('author', $article['author'])->count();
            // 统计作者的资源数
            $resourceCount = Resources::where('uploader', $article['author'])->count();
            
            $authorData = [
                'avatar' => $authorInfo['avatar'] ?: '/static/images/avatar.png',
                'name' => $authorInfo['name'],
                'resource_count' => $resourceCount,
                'article_count' => $articleCount
            ];
        } else {
            $authorData = [
                'avatar' => '/static/images/avatar.png',
                'name' => $article['author'],
                'resource_count' => 0,
                'article_count' => 0
            ];
        }

        // 获取上一篇和下一篇文章
        $prevArticle = Articles::where('id', '<', $id)
            ->where('delete_time', null)
            ->where('status', '<>', 3)
            ->where('cate', $article['cate'])
            ->field(['id', 'title'])
            ->order('id DESC')
            ->find();

        $nextArticle = Articles::where('id', '>', $id)
            ->where('delete_time', null)
            ->where('status', '<>', 3)
            ->where('cate', $article['cate'])
            ->field(['id', 'title'])
            ->order('id ASC')
            ->find();

        // 获取相关文章（同分类的其他文章）
        $relatedArticles = Articles::alias('a')
            ->join('articles_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',
                '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 POST 请求，返回 JSON 数据
        if (Request::isPost()) {
            return json([
                'code' => 1,
                'msg' => '获取成功',
                'data' => [
                    'authorInfo' => $authorData,
                    'article' => $article,
                    'cateName' => $cateName,
                    'prevArticle' => $prevArticle,
                    'nextArticle' => $nextArticle,
                    'relatedArticles' => $relatedArticles
                ]
            ]);
        }

        // GET 请求返回视图
        View::assign([
            'authorInfo' => $authorData,
            '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);

        // 检查文章是否存在
        $article = Articles::where('id', $id)
            ->where('delete_time', null)
            ->where('status', 2)
            ->find();

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

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

        if ($result) {
            // 返回更新后的点赞数
            $newLikes = $article['likes'] + 1;
            return json([
                'code' => 1,
                'msg' => '点赞成功',
                'data' => [
                    'likes' => $newLikes
                ]
            ]);
        } 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 = Articles::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 = Articles::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 = Articles::where('id', $id)->find();
            if (!$article) {
                return json(['code' => 0, 'msg' => '文章不存在']);
            }

            // 更新访问次数
            Articles::where('id', $id)->inc('views')->update();

            // 获取更新后的访问次数
            $newViews = Articles::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()]);
        }
    }

    //获取作者信息
    public function getAuthorInfo()
    {
        if (!Request::isPost()) {  
            return json(['code' => 0, 'msg' => '非法请求']);
        }

        $authorName = Request::post('name');
        if (empty($authorName)) {
            return json(['code' => 0, 'msg' => '作者名称不能为空']);
        }

        try {
            // 获取作者基本信息
            $author = Db::name('users')
                ->where('name', $authorName)
                ->field('id, name, avatar')
                ->find();

            if (!$author) {
                return json(['code' => 0, 'msg' => '作者不存在']);
            }

            // 获取作者发布的资源数量
            $resourceCount = Db::name('resources')
                ->where('user_id', $author['id'])
                ->where('delete_time', null)
                ->where('status', 2)  // 假设2是已发布状态
                ->count();

            // 获取作者发布的文章数量
            $articleCount = Db::name('articles')
                ->where('author', $authorName)
                ->where('delete_time', null)
                ->where('status', 2)  // 假设2是已发布状态
                ->count();

            return json([
                'code' => 1,
                'msg' => '获取成功',
                'data' => [
                    'avatar' => $author['avatar'],
                    'name' => $author['name'],
                    'resource_count' => $resourceCount,
                    'article_count' => $articleCount
                ]
            ]);

        } catch (\Exception $e) {
            return json(['code' => 0, 'msg' => '获取作者信息失败：' . $e->getMessage()]);
        }
    }
}