<?php
declare (strict_types=1);

namespace app\model\api;

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

/**
 * 论坛帖子模型
 * @mixin \think\Model
 */
class ForumPost extends BaseModel
{
    protected $pk = 'id';
    protected $table = 'forum_post';

    /**
     * 获取帖子列表
     * @param int $page 页码
     * @param int $pageSize 每页数量
     * @param array $where 筛选条件
     * @return array
     */
    public function getList($page = 1, $pageSize = 20, $where = [])
    {
        $pageSize = $pageSize > 50 ? 50 : (int)$pageSize;
        $page = $page <= 0 ? 1 : (int)$page;

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

        $query = $this->alias('p')
            ->field('p.*, u.nickname as author_name, u.avatar as author_avatar')
            ->leftJoin('user u', 'u.uid = p.uid')
            ->where($where)
            ->order('p.is_top', 'desc')
            ->order('p.create_time', 'desc');

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

        if ($total > 0) {
            $list = $query->page($page, $pageSize)->select();
            if (!empty($list)) {
                $list = $list->toArray();
                foreach ($list as &$item) {
                    // 处理图片JSON
                    if (!empty($item['images'])) {
                        $item['images'] = json_decode($item['images'], true) ?: [];
                    } else {
                        $item['images'] = [];
                    }
                    // 格式化时间
                    if (!empty($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
        ];
    }

    /**
     * 获取帖子详情
     * @param int $id 帖子ID
     * @return array|null
     */
    public function getDetail($id)
    {
        $post = $this->alias('p')
            ->field('p.*, u.nickname as author_name, u.avatar as author_avatar')
            ->leftJoin('user u', 'u.uid = p.uid')
            ->where('p.id', $id)
            ->where('p.status', 1)
            ->find();

        if (empty($post)) {
            return null;
        }

        $post = $post->toArray();

        // 处理图片JSON
        if (!empty($post['images'])) {
            $post['images'] = json_decode($post['images'], true) ?: [];
        } else {
            $post['images'] = [];
        }

        // 格式化时间
        if (!empty($post['create_time'])) {
            $post['create_time'] = date('Y-m-d H:i:s', $post['create_time']);
        }
        if (!empty($post['update_time'])) {
            $post['update_time'] = date('Y-m-d H:i:s', $post['update_time']);
        }

        // 增加浏览次数
        $this->where('id', $id)->inc('view_count')->update();

        return $post;
    }

    /**
     * 创建帖子
     * @param int $uid 用户ID
     * @param array $data 帖子数据
     * @return array [success, message, data]
     */
    public function createPost($uid, $data)
    {
        try {
            self::beginTrans();

            $insertData = [
                'uid' => $uid,
                'title' => trim($data['title'] ?? ''),
                'content' => trim($data['content'] ?? ''),
                'images' => !empty($data['images']) ? json_encode($data['images'], JSON_UNESCAPED_UNICODE) : '',
                'status' => 0, // 待审核
                'create_time' => time(),
                'update_time' => time(),
            ];

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

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

            self::commitTrans();
            return [1, '发布成功，等待审核'];

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

    /**
     * 获取用户发布的帖子列表
     * @param int $uid 用户ID
     * @param int $page 页码
     * @param int $pageSize 每页数量
     * @return array
     */
    public function getUserPosts($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->where('uid', $uid)
                ->order('create_time', 'desc')
                ->page($page, $pageSize)
                ->select()
                ->toArray();

            foreach ($list as &$item) {
                if (!empty($item['images'])) {
                    $item['images'] = json_decode($item['images'], true) ?: [];
                } else {
                    $item['images'] = [];
                }
                if (!empty($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
        ];
    }
}