<?php
/**
 * LikeService.class.php
 * 活动、评论点赞信息表
 * @author: daijun
 * @copyright: vchangyi.com
 */

namespace Common\Service;

use Common\Common\User;
use Common\Model\ActivityModel;
use Common\Model\CommentModel;
use Common\Model\LikeModel;
use Common\Model\ReplyModel;

class LikeService extends AbstractService
{

    // 发布活动
    public static $levels = [
        self::LIKE_ACTIVITY_TYPE, // 点赞活动
        self::LIKE_COMMENT_TYPE, // 点赞回帖
        self::LIKE_REPLY_TYPE,  // 点赞回复
    ];

    /**
     * @var  ActivityModel 活动model
     */
    protected $_d_activity;

    /**
     * @var  CommentModel 评论model
     */
    protected $_d_comment;

    /**
     * @var ReplyModel 回复model
     */
    protected $_d_reply;

    // 构造方法
    public function __construct()
    {
        $this->_d = new LikeModel();
        $this->_d_activity = new ActivityModel();
        $this->_d_comment = new CommentModel();
        $this->_d_reply = new ReplyModel();
        parent::__construct();
    }

    /**
     * 获取点赞列表
     *
     * @param array $params 查询参数
     *              +++ int limit 每页条数
     *              +++ int page  页码
     *              +++ int type  点赞类型
     *              +++ int obj_id  点赞对象ID
     *
     * @return array
     */
    public function get_like_list($params = [])
    {
        // 每页条数
        $limit = !isset($params['limit']) ? self::DEFAULT_LIMIT : intval($params['limit']);
        $page = !isset($params['page']) ? self::DEFAULT_PAGE : intval($params['page']);

        // 参数校验
        $obj_id = intval($params['obj_id']);
        $type = intval($params['type']);

        if (!in_array($type, self::$levels)) {
            // 点赞类型不正确
            E('_ERR_LIKE_TYPE');
        }

        if (!$obj_id) {
            // 数据id不能为空
            E('_EMPTY_DATA_ID');
        }

        list($start, $limit, $page) = page_limit($page, $limit);

        // 分页参数
        $page_option = [$start, $limit];

        // 排序按照发布时间参数
        $order_option = ['like_id' => 'DESC'];

        // 组装查询条件
        $conds = ['obj_id' => $obj_id, 'type' => $type];

        // 查询总条数
        $total = $this->_d->count_by_conds($conds);

        $res_list = [];
        if ($total > 0) {
            // 返回参数
            $fields = 'like_id,uid,created';

            // 列表和总数
            $list = $this->_d->list_by_conds($conds, $page_option, $order_option, $fields);

            $uids = array_column($list, 'uid');

            $user = User::instance();
            // 查询用户集合（包含删除用户）
            $user_list = $user->listUsersAll(['memUids' => $uids, 'memAll' => 1]);

            // 循环格式化列表数据
            foreach ($list as $val) {

                $user_info = $user_list[$val['uid']];

                $value = [
                    'like_id' => $val['like_id'],
                    'uid' => $val['uid'],
                    'username' => strval($user_info['memUsername']),
                    'avatar' => $user->avatar($user_info['memUid'], $user_info),
                    'created' => $val['created']
                ];

                $res_list[] = $value;
            }
        }

        return [
            'page' => $page,
            'limit' => $limit,
            'total' => intval($total),
            'list' => $res_list,
        ];
    }

    /**
     * 点赞接口
     *
     * @param array $param
     *          +++ int type 点赞类型
     *          +++ int obj_id 点赞对象数据ID
     *          +++ string  uid 点赞人uid
     *
     * @return  bool
     * @throws \Com\service_exception
     */
    public function add_like_data($param = [])
    {
        $type = intval($param['type']);
        $obj_id = intval($param['obj_id']);

        if (!in_array($type, self::$levels)) {
            // 点赞类型不对
            E('_ERR_LIKE_TYPE');
        }

        if (!$obj_id) {
            // 数据id不为空
            E('_EMPTY_DATA_ID');
        }

        // 查询点赞记录
        $count = $this->count_by_conds(
            [
                'uid' => $param['uid'],
                'obj_id' => $obj_id,
                'type' => $type,
            ]
        );

        if ($count) {
            // 已经点过赞
            E('_ERR_AC_LIKE_END');
        }

        try {
            // 开始事务
            $this->_d->start_trans();

            // 插入点赞记录表
            $this->_d->insert(['uid' => $param['uid'], 'obj_id' => $obj_id, 'type' => $type]);

            // 更新主表统计数据
            if (self::LIKE_ACTIVITY_TYPE == $type) {
                // 活动点赞+1
                $num = $this->_d_activity->update($obj_id, ['likes=likes+(?)' => 1]);
            } elseif (self::LIKE_COMMENT_TYPE == $type) {
                // 回帖点赞+1
                $num = $this->_d_comment->update($obj_id, ['likes=likes+(?)' => 1]);
            } else {
                // 回复点赞+1
                $num = $this->_d_reply->update($obj_id, ['likes=likes+(?)' => 1]);
            }

            if (!$num) {
                // 未更新成功【逻辑回滚】
                $this->_d->rollback();
                E('_ERR_ADD_LIKE_FAILED');
            }
            // 提交修改
            $this->_d->commit();

        } catch (\Think\Exception $e) {
            \Think\Log::record($e);
            $this->_d->rollback();
            E('_ERR_ADD_LIKE_FAILED');

            return false;
        } catch (\Exception $e) {
            \Think\Log::record($e);
            $this->_d->rollback();
            E('_ERR_ADD_LIKE_FAILED');

            return false;
        }

        return true;
    }

    /**
     * 取消点赞接口
     *
     * @param array $param
     *          +++ int type 点赞类型
     *          +++ int obj_id 点赞对象数据ID
     *          +++ string  uid 点赞人uid
     *
     * @return bool
     *
     * @throws \Com\service_exception
     */
    public function del_like_data($param = [])
    {
        $type = intval($param['type']);
        $obj_id = intval($param['obj_id']);

        if (!in_array($type, self::$levels)) {
            // 点赞类型不对
            E('_ERR_LIKE_TYPE');
        }

        if (!$obj_id) {
            // 数据id不为空
            E('_EMPTY_DATA_ID');
        }

        // 查询点赞记录
        $count = $this->count_by_conds(
            [
                'uid' => $param['uid'],
                'obj_id' => $obj_id,
                'type' => $type,
            ]
        );

        if (!$count) {
            // 没有点赞记录
            E('_ERR_AC_UNLIKE_END');
        }

        try {
            // 开始事务
            $this->_d->start_trans();

            // 删除点赞记录表
            $del_num = $this->_d->delete_by_conds(['uid' => $param['uid'], 'obj_id' => $obj_id, 'type' => $type]);

            // 更新主表统计数据
            if (self::LIKE_ACTIVITY_TYPE == $type) {
                // 活动点赞数-1
                $num = $this->_d_activity->update($obj_id, ['likes=likes-(?)' => 1]);
            } elseif (self::LIKE_COMMENT_TYPE == $type) {
                // 回帖点赞数-1
                $num = $this->_d_comment->update($obj_id, ['likes=likes-(?)' => 1]);
            } else {
                // 回复点赞数-1
                $num = $this->_d_reply->update($obj_id, ['likes=likes-(?)' => 1]);
            }

            if (!$num || !$del_num) {
                // 未更新成功【逻辑回滚】
                $this->_d->rollback();

                E('_ERR_UN_LIKE_FAILED');
            }

            // 提交修改
            $this->_d->commit();

        } catch (\Think\Exception $e) {
            \Think\Log::record($e);
            $this->_d->rollback();
            E('_ERR_UN_LIKE_FAILED');

        } catch (\Exception $e) {
            \Think\Log::record($e);
            $this->_d->rollback();
            E('_ERR_UN_LIKE_FAILED');
        }

        return true;
    }
}