<?php
declare (strict_types=1);

namespace app\model\api;

use library\basic\BaseModel;
use think\Model;
use think\facade\Db;

/**
 * 论坛评论模型
 * @mixin \think\Model
 */
class ForumComment extends BaseModel
{
    protected $pk = 'id';
    protected $table = 'forum_comment';

    /**
     * 获取评论列表
     * @param int $postId 帖子ID
     * @param int $page 页码
     * @param int $pageSize 每页数量
     * @return array
     */
    public function getList($postId, $page = 1, $pageSize = 20)
    {
        $pageSize = $pageSize > 50 ? 50 : (int)$pageSize;
        $page = $page <= 0 ? 1 : (int)$page;

        $where = [
            ['post_id', '=', $postId],
            ['status', '=', 1]
        ];

        $total = $this->where($where)->count();
        $list = [];

        if ($total > 0) {
            $list = $this->alias('c')
                ->field('c.*, u.nickname as author_name, u.avatar as author_avatar')
                ->leftJoin('user u', 'u.uid = c.uid')
                ->where($where)
                ->order('c.create_time', 'asc')
                ->page($page, $pageSize)
                ->select();

            if (!empty($list)) {
                $list = $list->toArray();
                foreach ($list as &$item) {
                    if (!empty($item['create_time'])) {
                        $item['create_time'] = date('Y-m-d H:i:s', $item['create_time']);
                    }
                }
            }
        }

        return [
            'list' => $list,
            'total' => $total,
            'page' => $page,
            'pageSize' => $pageSize
        ];
    }

    /**
     * 添加评论
     * @param int $uid 用户ID
     * @param int $postId 帖子ID
     * @param string $content 评论内容
     * @return array [success, message, data]
     */
    public function addComment($uid, $postId, $content)
    {
        try {
            self::beginTrans();

            // 检查帖子是否存在且状态正常
            $post = Db::name('forum_post')->where('id', $postId)->where('status', 1)->find();
            if (!$post) {
                self::rollbackTrans();
                return [0, '帖子不存在或已被禁用'];
            }

            $insertData = [
                'post_id' => $postId,
                'uid' => $uid,
                'content' => trim($content),
                'status' => 1,
                'create_time' => time(),
                'update_time' => time(),
            ];

            $result = $this->insert($insertData);

            if (!$result) {
                self::rollbackTrans();
                return [0, '评论失败'];
            }

            // 更新帖子评论数
            Db::name('forum_post')->where('id', $postId)->inc('comment_count')->update();

            self::commitTrans();
            return [1, '评论成功', ['post_id' => $postId]];

        } catch (\Exception $e) {
            self::rollbackTrans();
            return [0, '评论失败：' . $e->getMessage()];
        }
    }

    /**
     * 删除评论
     * @param int $id 评论ID
     * @param int $uid 用户ID
     * @return array [success, message]
     */
    public function deleteComment($id, $uid)
    {
        try {
            self::beginTrans();

            $comment = $this->where('id', $id)->where('uid', $uid)->find();
            if (!$comment) {
                self::rollbackTrans();
                return [0, '评论不存在或无权删除'];
            }

            // 删除评论
            $this->where('id', $id)->delete();

            // 更新帖子评论数
            Db::name('forum_post')->where('id', $comment['post_id'])->dec('comment_count')->update();

            self::commitTrans();
            return [1, '删除成功'];

        } catch (\Exception $e) {
            self::rollbackTrans();
            return [0, '删除失败：' . $e->getMessage()];
        }
    }

    /**
     * 获取用户评论列表
     * @param int $uid 用户ID
     * @param int $page 页码
     * @param int $pageSize 每页数量
     * @return array
     */
    public function getUserComments($uid, $page = 1, $pageSize = 20)
    {
        $pageSize = $pageSize > 50 ? 50 : (int)$pageSize;
        $page = $page <= 0 ? 1 : (int)$page;

        $total = $this->where('uid', $uid)->count();
        $list = [];

        if ($total > 0) {
            $list = $this->alias('c')
                ->field('c.*, p.title as post_title, p.id as post_id')
                ->leftJoin('forum_post p', 'p.id = c.post_id')
                ->where('c.uid', $uid)
                ->order('c.create_time', 'desc')
                ->page($page, $pageSize)
                ->select();

            if (!empty($list)) {
                $list = $list->toArray();
                foreach ($list as &$item) {
                    if (!empty($item['create_time'])) {
                        $item['create_time'] = date('Y-m-d H:i:s', $item['create_time']);
                    }
                }
            }
        }

        return [
            'list' => $list,
            'total' => $total,
            'page' => $page,
            'pageSize' => $pageSize
        ];
    }
}