<?php
declare(strict_types=1);

namespace app\api\controller;

use app\api\controller\Base;
use app\common\model\News as NewsModel;
use app\common\model\UserNewsFavorite;

class News extends Base
{
    /**
     * 获取精选新闻列表
     * @return \think\Response
     */
    public function getFeaturedNewsList()
    {
        $where = [];
        $where['status'] = 1;
        $where['is_featured'] = 1;
        $limit = $this->request->param('limit', 10);
        $title = $this->request->param('title', '');
        if ($title) {
            $where[] = ['title', 'like', '%' . $title . '%'];
        }
        $newsList = NewsModel::getList($where, 'id,title,cover_image,publish_time', 'publish_time desc', $limit);
        return $this->renderSuccess('', $newsList);
    }
    /**
     * 获取热榜新闻列表
     * @return \think\Response
     */
    public function getHotNewsList()
    {
        $where = [];
        $where['status'] = 1;
        $where['is_hot'] = 1;
        $title = $this->request->param('title', '');
        if ($title) {
            $where[] = ['title', 'like', '%' . $title . '%'];
        }
        $limit = $this->request->param('limit', 10);
        $newsList = NewsModel::getList($where, 'id,title,cover_image,publish_time,is_hot', 'publish_time desc', $limit);
        return $this->renderSuccess('', $newsList);
    }
    /**
     * 获取用户关注的新闻列表
     * @return \think\Response
     */
    public function getFollowNewsList()
    {
        $title = $this->request->param('title', '');
        $limit = intval($this->request->param('limit', 10));
        $page = intval($this->request->param('page', 1));

        $userId = $this->getUserId();
        if ($userId == 0) {
            return $this->renderSuccess('', ['list' => [], 'count' => 0]);
        }

        // 构建查询
        $model = NewsModel::alias('n')
            ->join('user_news_favorite u', 'n.id=u.news_id')
            ->where('u.user_id', '=', $userId)
            ->where('u.is_canceled', '=', 0)
            ->where('n.status', '=', 1);

        // 如果有标题搜索条件
        if ($title) {
            $model = $model->where('n.title', 'like', '%' . $title . '%');
        }

        // 获取总数
        $count = $model->count();

        // 查询数据并分页
        $list = $model->field('n.id, n.title, n.cover_image, n.publish_time, n.author_name')
            ->order('u.create_time', 'desc')
            ->page($page, $limit)
            ->select()
            ->toArray();

        return $this->renderSuccess('', [
            'list' => $list,
            'count' => $count,
            'limit' => $limit,
            'page' => $page
        ]);
    }

    /**
     * 获取新闻详情
     * @return \think\Response
     */
    public function getNewsDetail()
    {
        $id = $this->request->param('id', 0);
        //来源 0: 热榜，1精选，2关注
        $current = $this->request->param('current', 0);
        $newsInfo = NewsModel::getInfo(['id' => $id], 'id,title,cover_image,publish_time,content,author_name');
        if (!$newsInfo) {
            return $this->renderError('新闻不存在');
        }
        $newsInfo['content'] = htmlspecialchars_decode($newsInfo['content']);

        // 获取上下篇数据
        $condition = $this->getCondition($current);
        if ($condition) {
            // 获取上一篇（发布时间小于当前文章）
            $newsInfo['next_data'] = $this->getAdjacentNews($id, $newsInfo['publish_time'], $condition, '<', 'desc');
            // 获取下一篇（发布时间大于当前文章）
            $newsInfo['prev_data'] = $this->getAdjacentNews($id, $newsInfo['publish_time'], $condition, '>', 'asc');
        } else {
            $newsInfo['next_data'] = null;
            $newsInfo['prev_data'] = null;
        }
        $newsInfo['user_follow'] = false;
        $userId = $this->getUserId();
        if ($userId > 0) {
            $newsInfo['user_follow'] = UserNewsFavorite::isFavorite($userId, $id);
        }

        // 随机查询5条新闻数据
        $re = NewsModel::where('status', 1)
            ->where($condition, '=', 1)
            ->where('cover_image', '!=', '')
            ->field('id,title,cover_image,publish_time,author_name,is_hot,is_featured')
            ->orderRaw('rand()')
            ->limit(5)
            ->select()
            ->toArray();

        $newsInfo['recommend_news'] = $re;
        // $newsInfo['publish_time'] = date('Y-m-d H:i:s', $newsInfo['publish_time']);
        return $this->renderSuccess('', $newsInfo);
    }

    /**
     * 根据来源类型获取条件
     * @param int $current 来源类型 0: 热榜，1精选，2关注
     * @return string|null 对应的条件字段
     */
    private function getCondition($current)
    {
        switch ($current) {
            case 0:
                return 'is_hot';
            case 1:
                return 'is_featured';
            case 2:
                // 可以根据需求扩展
                // return 'is_follow';
                return null;
            default:
                return null;
        }
    }

    /**
     * 获取相邻的新闻
     * @param int $id 当前新闻ID
     * @param int $publishTime 当前发布时间
     * @param string $condition 条件字段
     * @param string $comparison 比较符号
     * @param string $orderType 排序方式
     * @return mixed 查询结果
     */
    private function getAdjacentNews($id, $publishTime, $condition, $comparison, $orderType)
    {
        return NewsModel::where('id', '!=', $id)
            ->where($condition, '=', 1)
            ->where('status', '=', 1)
            ->where('publish_time', $comparison, $publishTime)
            ->field('id,title,cover_image,publish_time,is_hot,is_featured')
            ->order('publish_time ' . $orderType)
            ->find();
    }

    /**
     * 收藏新闻
     * @return \think\Response
     */
    public function addFavorite()
    {
        $newsId = $this->request->param('news_id', 0);
        if (empty($newsId)) {
            return $this->renderError('参数错误');
        }

        // 检查新闻是否存在
        $newsInfo = NewsModel::getInfo(['id' => $newsId], 'id');
        if (!$newsInfo) {
            return $this->renderError('新闻不存在');
        }

        // 获取当前用户ID
        $userId = $this->getUserId();
        if (!$userId) {
            return $this->renderError('请先登录');
        }

        // 添加收藏
        $result = UserNewsFavorite::addFavorite($userId, $newsId);
        if ($result) {
            return $this->renderSuccess('收藏成功');
        }

        return $this->renderError('收藏失败');
    }

    /**
     * 取消收藏新闻
     * @return \think\Response
     */
    public function cancelFavorite()
    {
        $newsId = $this->request->param('news_id', 0);
        if (empty($newsId)) {
            return $this->renderError('参数错误');
        }

        // 获取当前用户ID
        $userId = $this->getUserId();
        if (!$userId) {
            return $this->renderError('请先登录');
        }

        // 取消收藏
        $result = UserNewsFavorite::cancelFavorite($userId, $newsId);
        if ($result) {
            return $this->renderSuccess('取消收藏成功');
        }

        return $this->renderError('取消收藏失败或未收藏该新闻');
    }

    /**
     * 检查新闻是否已收藏
     * @return \think\Response
     */
    public function checkFavorite()
    {
        $newsId = $this->request->param('news_id', 0);
        if (empty($newsId)) {
            return $this->renderError('参数错误');
        }

        // 获取当前用户ID
        $userId = $this->getUserId();
        if (!$userId) {
            return $this->renderError('请先登录');
        }

        // 检查是否已收藏
        $favorite = UserNewsFavorite::isFavorite($userId, $newsId);

        return $this->renderSuccess('', ['is_favorite' => $favorite ? true : false]);
    }
}