#ifndef __M_HOST_H__
#define __M_HOST_H__
#include "mq_exchange.hpp"
#include "mq_queue.hpp"
#include "mq_binding.hpp"
#include "mq_message.hpp"

namespace bitmq
{
    class VirtualHost
    {
    public:
    using ptr = std::shared_ptr<VirtualHost>;
        VirtualHost(const std::string &hname, const std::string &basedir, const std::string &dbfile) : _host_name(hname),
                                                                                _emp(std::make_shared<ExchangeManager>(dbfile)),
                                                                                _mqmp(std::make_shared<MsgQueueManager>(dbfile)),
                                                                                _bmp(std::make_shared<BindingManager>(dbfile)),
                                                                                _mmp(std::make_shared<MessageManager>(basedir))
        {
            // 获取到所有的队列信息，通过队列名称恢复历史消息数据
            QueueMap qm = _mqmp->allQueues();
            for (auto &q : qm)
            {
                _mmp->initQueueMessage(q.first);
            }
        }

        bool declareExchange(const std::string &name,
                             ExchangeType type, bool durable, bool auto_delete,
                             const google::protobuf::Map<std::string, std::string> &args)
        {
            return _emp->declareExchange(name, type, durable, auto_delete, args);
        }

        void deleteExchange(const std::string &name)
        {
            // 删除交换机的时候，需要将交换机相关的绑定信息也删除掉。
            _bmp->removeExchangeBindings(name);
            return _emp->deleteExchange(name);
        }
        Exchange::ptr selectExchange(const std::string &ename) {
            return _emp->selectExchange(ename);
        }
        
        bool declareQueue(const std::string &qname,
                          bool qdurable,
                          bool qexclusive,
                          bool qauto_delete,
                          const google::protobuf::Map<std::string, std::string> &qargs)
        {
            // 初始化队列的消息句柄（消息的存储管理）
            // 队列的创建
            _mmp->initQueueMessage(qname);
            return _mqmp->declareQueue(qname, qdurable, qexclusive, qauto_delete, qargs);
        }

        void deleteQueue(const std::string &name)
        {
            // 删除的时候队列相关的数据有两个：队列的消息，队列的绑定信息
            _mmp->destroyQueueMessage(name);
            _bmp->removeMsgQueueBindings(name);
            return _mqmp->deleteQueue(name);
        }
        bool existsQueue(const std::string &name) {
            return _mqmp->exists(name);
        }
        QueueMap allQueues() {
            return _mqmp->allQueues();
        }

        bool bind(const std::string &ename, const std::string &qname, const std::string &key)
        {
            Exchange::ptr ep = _emp->selectExchange(ename);
            if (ep.get() == nullptr)
            {
                DLOG("进行队列绑定失败，交换机%s不存在!", ename.c_str());
                return false;
            }
            MsgQueue::ptr mqp = _mqmp->selectQueue(qname);
            if (mqp.get() == nullptr)
            {
                DLOG("进行队列绑定失败，队列%s不存在!", qname.c_str());
                return false;
            }
            return _bmp->bind(ename, qname, key, ep->durable && mqp->durable);
        }
        void unBind(const std::string &ename, const std::string &qname)
        {
            return _bmp->unBind(ename, qname);
        }
        MsgQueueBindingMap exchangeBindings(const std::string &ename)
        {
            return _bmp->getExchangeBindings(ename);
        }
        bool existsBinding(const std::string &ename, const std::string &qname);
        bool basicPublish(const std::string &qname, BasicProperties *bp, const std::string &body)
        {
            MsgQueue::ptr mqp = _mqmp->selectQueue(qname);
            if (mqp.get() == nullptr)
            {
                DLOG("发布消息失败，队列%s不存在!", qname.c_str());
                return false;
            }
            return _mmp->insert(qname, bp, body, mqp->durable);
        }
        MessagePtr basicConsume(const std::string &qname)
        {
            // 从队列中取出一个msg
            return _mmp->front(qname);
        }
        void basicAck(const std::string &qname, const std::string &msgid)
        {
            return _mmp->ack(qname, msgid);
        }
        void clear()
        {
            _emp->clear();
            _mqmp->clear();
            _bmp->clear();
            _mmp->clear();
        }

    private:
        const std::string &_host_name;
        ExchangeManager::ptr _emp;
        MsgQueueManager::ptr _mqmp;
        BindingManager::ptr _bmp;
        MessageManager::ptr _mmp;
    };
}

#endif