<?php
declare (strict_types=1);

namespace app\api\controller;

use app\BaseController;
use app\model\api\ForumPost;
use app\model\api\ForumComment;
use app\model\api\User as UserModel;
use app\Request;
use library\services\UtilService;
use think\facade\Db;

/**
 * 论坛控制器
 */
class Forum extends BaseController
{
    /**
     * 检查用户发帖权限
     * @param int $uid
     * @return bool
     */
    private function checkPostPermission($uid)
    {
        $user = Db::name('user')->where('uid', $uid)->find();
        return !empty($user) && $user['permission'] == 1;
    }

    /**
     * 帖子列表
     * @param Request $request
     */
    public function postList(Request $request)
    {
        $post = UtilService::getMore([
            ['page', 1],
            ['pageSize', 20],
        ], $request);

        $result = (new ForumPost())->getList((int)$post['page'], (int)$post['pageSize']);

        return app('json')->success($result);
    }

    /**
     * 帖子详情
     * @param Request $request
     */
    public function postDetail(Request $request)
    {
        $post = UtilService::getMore([
            ['id', 0, 'empty', '参数错误'],
        ], $request);

        $detail = (new ForumPost())->getDetail((int)$post['id']);

        if (!$detail) {
            return app('json')->fail('帖子不存在');
        }

        return app('json')->success($detail);
    }

    /**
     * 发布帖子
     * @param Request $request
     */
    public function createPost(Request $request)
    {
        $uid = $request->user['uid'];

        // 检查发帖权限
        if (!$this->checkPostPermission($uid)) {
            return app('json')->fail('您没有发帖权限');
        }

        $postData = UtilService::getMore([
            ['title', '', 'empty', '请填写标题'],
            ['content', '', 'empty', '请填写内容'],
            ['images', []],
        ], $request);

        // 验证标题长度
        if (mb_strlen($postData['title']) > 200) {
            return app('json')->fail('标题不能超过200个字符');
        }

        // 验证内容长度
        if (mb_strlen($postData['content']) < 10) {
            return app('json')->fail('内容不能少于10个字符');
        }

        $result = (new ForumPost())->createPost($uid, $postData);

        if ($result[0]) {
            return app('json')->success($result[1]);
        } else {
            return app('json')->fail($result[1]);
        }
    }

    /**
     * 我的帖子列表
     * @param Request $request
     */
    public function myPosts(Request $request)
    {
        $uid = $request->user['uid'];

        $post = UtilService::getMore([
            ['page', 1],
            ['pageSize', 20],
        ], $request);

        $result = (new ForumPost())->getUserPosts($uid, (int)$post['page'], (int)$post['pageSize']);

        return app('json')->success($result);
    }

    /**
     * 评论列表
     * @param Request $request
     */
    public function commentList(Request $request)
    {
        $post = UtilService::getMore([
            ['post_id', 0, 'empty', '参数错误'],
            ['page', 1],
            ['pageSize', 20],
        ], $request);

        $result = (new ForumComment())->getList((int)$post['post_id'], (int)$post['page'], (int)$post['pageSize']);

        return app('json')->success($result);
    }

    /**
     * 添加评论
     * @param Request $request
     */
    public function addComment(Request $request)
    {
        $uid = $request->user['uid'];

        $postData = UtilService::getMore([
            ['post_id', 0, 'empty', '参数错误'],
            ['content', '', 'empty', '请填写评论内容'],
        ], $request);

        // 验证内容长度
        if (mb_strlen($postData['content']) < 1) {
            return app('json')->fail('评论内容不能为空');
        }

        if (mb_strlen($postData['content']) > 1000) {
            return app('json')->fail('评论内容不能超过1000个字符');
        }

        $result = (new ForumComment())->addComment($uid, (int)$postData['post_id'], $postData['content']);

        if ($result[0]) {
            return app('json')->success($result[1], $result[2] ?? []);
        } else {
            return app('json')->fail($result[1]);
        }
    }

    /**
     * 删除评论
     * @param Request $request
     */
    public function deleteComment(Request $request)
    {
        $uid = $request->user['uid'];

        $post = UtilService::getMore([
            ['id', 0, 'empty', '参数错误'],
        ], $request);

        $result = (new ForumComment())->deleteComment((int)$post['id'], $uid);

        if ($result[0]) {
            return app('json')->success($result[1]);
        } else {
            return app('json')->fail($result[1]);
        }
    }

    /**
     * 我的评论列表
     * @param Request $request
     */
    public function myComments(Request $request)
    {
        $uid = $request->user['uid'];

        $post = UtilService::getMore([
            ['page', 1],
            ['pageSize', 20],
        ], $request);

        $result = (new ForumComment())->getUserComments($uid, (int)$post['page'], (int)$post['pageSize']);

        return app('json')->success($result);
    }

    /**
     * 检查发帖权限
     * @param Request $request
     */
    public function checkPermission(Request $request)
    {
        $uid = $request->user['uid'];
        $hasPermission = $this->checkPostPermission($uid);

        return app('json')->success('查询成功', [
            'has_permission' => $hasPermission
        ]);
    }
}