/**
 * Copyright 2018-2028 WindChat Group
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.windchat.im.business.impl;

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.windchat.common.command.Command;
import com.windchat.common.command.CommandResponse;
import com.windchat.common.constant.CommandConst;
import com.windchat.common.constant.ErrorCode2;
import com.windchat.common.logs.LogUtils;
import com.windchat.im.business.bean.ApiActions;
import com.windchat.im.business.dao.UserGroupDao;
import com.windchat.im.business.dao.UserProfileDao;
import com.windchat.im.storage.bean.GroupProfileBean;
import com.windchat.im.storage.bean.SimpleUserBean;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.reflect.Method;
import java.util.concurrent.TimeUnit;

/**
 * @author Sam{@link an.guoyue254@gmail.com}
 * @since 2018-01-31 12:20:14
 */
public abstract class AbstractRequest implements IRequestService {
    private static final Logger logger = LoggerFactory.getLogger(AbstractRequest.class);

    Cache<String, Method> cache = CacheBuilder.newBuilder().maximumSize(1000).expireAfterWrite(10, TimeUnit.MINUTES).build();

    public CommandResponse execute(Command command) {
        return executeMethodByReflect(command);
    }

    private CommandResponse executeMethodByReflect(Command command) {
        CommandResponse response = null;
        ErrorCode2 errCode = ErrorCode2.ERROR;
        try {
            Method actionMethod = cache.getIfPresent(command.getAction());
            if (actionMethod == null) {
                Method[] allMethods = this.getClass().getDeclaredMethods();
                ApiActions serviceAction = this.getClass().getDeclaredAnnotation(ApiActions.class);
                for (Method method : allMethods) {
                    ApiActions apiActions = method.getAnnotation(ApiActions.class);
                    if (apiActions == null) {
                        continue;
                    }
                    String action = serviceAction.action() + apiActions.action();
                    if (action.equals(command.getAction())) {
                        response = (CommandResponse) method.invoke(this, command);
                        cache.put(action, method);
                        break;
                    }
                }
            } else {
                response = (CommandResponse) actionMethod.invoke(this, command);
            }
        } catch (Exception e) {
            LogUtils.requestErrorLog(logger, command, e);
        }

        if (response == null) {
            response = new CommandResponse().setVersion(CommandConst.PROTOCOL_VERSION)
                    .setAction(CommandConst.ACTION_RES).setErrCode2(errCode);
        }
        return response;
    }

    //检查请求的参数中的siteUserId是否是存在的
    public boolean checkUserIdLegal(String siteUserId) {
        if (StringUtils.isNotEmpty(siteUserId)) {
            SimpleUserBean userProfile = UserProfileDao.getInstance().getSimpleProfileById(siteUserId);
            if (userProfile != null && StringUtils.isNotEmpty(userProfile.getSiteUserId())) {
                return true;
            }
        }
        return false;
    }

    //检查请求的参数中的groupId是否是存在的
    public boolean checkGroupIdLegal(String groupId) {
        if (StringUtils.isNotEmpty(groupId)) {
            GroupProfileBean groupProfile = UserGroupDao.getInstance().getSimpleGroupBeanById(groupId);
            if (groupProfile != null) {
                return true;
            }
        }
        return false;
    }

}