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/**
 * Copyright 2019 The JoyQueue Authors.
 *
 * 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 org.joyqueue.service.impl;

import com.alibaba.fastjson.JSON;
import com.google.common.base.Preconditions;
import org.joyqueue.convert.CodeConverter;
import org.joyqueue.domain.TopicName;
import org.joyqueue.model.domain.Application;
import org.joyqueue.model.domain.Identity;
import org.joyqueue.model.domain.Producer;
import org.joyqueue.model.domain.Topic;
import org.joyqueue.nsr.ProducerNameServerService;
import org.joyqueue.nsr.TopicNameServerService;
import org.joyqueue.service.ApplicationService;
import org.joyqueue.service.ProducerService;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service("producerService")
public class ProducerServiceImpl  implements ProducerService {
    private final Logger logger = LoggerFactory.getLogger(ProducerServiceImpl.class);

    @Autowired
    private ApplicationService applicationService;

    @Autowired
    private TopicNameServerService topicNameServerService;


    @Autowired
    private ProducerNameServerService producerNameServerService;

    @Transactional(propagation = Propagation.REQUIRED, readOnly = false)
    @Override
    public int add(Producer producer) {
        Preconditions.checkArgument(producer!=null && producer.getTopic()!=null, "invalid producer arg");

        int count;
        try {
            //Find topic
            Topic topic = topicNameServerService.findById(producer.getTopic().getId());
            producer.setTopic(topic);
            producer.setNamespace(topic.getNamespace());
            //Add producer
            count = producerNameServerService.add(producer);
            if (count != 1) {
                throw new IllegalStateException("add producer error.");
            }
        }catch (Exception e){
            String errorMsg = String.format("add producer with nameServer failed, producer is %s.", JSON.toJSONString(producer));
            logger.error(errorMsg, e);
            throw new RuntimeException(errorMsg, e);//回滚
        }

        return count;
    }

    @Override
    public Producer findById(String s) throws Exception {
        return fillProducer(producerNameServerService.findById(s));
    }

    @Override
    public int delete(Producer producer) {
        //Validate
        checkArgument(producer);
        //Update producer status
        int count;
        try {
            count = producerNameServerService.delete(producer);
            if (count != 1) {
                throw new IllegalStateException("update producer status error.");
            }
        }catch (Exception e){
            String errorMsg = String.format("remove producer status by nameServer failed, producer is %s.", JSON.toJSONString(producer));
            logger.error(errorMsg, e);
            throw new RuntimeException(errorMsg, e);//回滚
        }
        return count;
    }


    @Override
    public int update(Producer producer) {
        //Validate
        checkArgument(producer);
        int count;
        try {
            //Update
            count = producerNameServerService.update(producer);
            if (count != 1) {
                throw new IllegalStateException("update producer error.");
            }
        }catch (Exception e){
            String errorMsg = String.format("update producer by nameServer failed, producer is %s.", JSON.toJSONString(producer));
            logger.error(errorMsg, e);
            throw new RuntimeException(errorMsg, e);//回滚
        }
        return count;
    }

    @Override
    public List findByTopic(String namespace, String topic) {
        try {
            return fillProducers(producerNameServerService.findByTopic(topic, namespace));
        } catch (Exception e) {
            logger.error("findByTopic producer with nameServer failed, producer is {}, {}", namespace, topic, e);
            throw new RuntimeException(e);
        }
    }

    @Override
    public List findByApp(String app) {
        try {
            return fillProducers(producerNameServerService.findByApp(app));
        } catch (Exception e) {
            logger.error("findByApp producer with nameServer failed, producer is {}", app, e);
            throw new RuntimeException(e);
        }
    }

    @Override
    public Producer findByTopicAppGroup(String namespace, String topic, String app) {
        try {
            TopicName topicName = TopicName.parse(topic);
            return fillProducer(producerNameServerService.findByTopicAppGroup(namespace, topicName.getCode(), app));
        } catch (Exception e) {
            logger.error("findByTopicAppGroup producer with nameServer failed, producer is {}, {}, {}", namespace, topic, app, e);
            throw new RuntimeException(e);
        }
    }

    private void checkArgument(Producer producer) {
        Preconditions.checkArgument(producer != null, "invalidate producer arg.");
    }

    protected List fillProducers(List producers) {
        if (CollectionUtils.isEmpty(producers)) {
            return producers;
        }
        for (Producer producer : producers) {
            fillProducer(producer);
        }
        return producers;
    }

    protected Producer fillProducer(Producer producer) {
        if (producer == null) {
            return null;
        }
        Identity app = producer.getApp();
        if (app == null || StringUtils.isBlank(app.getCode())) {
            return producer;
        }

        Application application = applicationService.findByCode(CodeConverter.convertAppFullName(app.getCode()).getCode());
        if (application != null) {
            app.setId(application.getId());
            app.setName(application.getName());
            producer.setOwner(application.getOwner());
        }
        return producer;
    }

}