#include "precompile.h"

#include <a8/openssl.h>
#include <a8/udplog.h>
#include <a8/timer.h>

#include "dbengine.h"
#include "jsondatamgr.h"

static void OnDBError(a8::XParams& param, int error_code, const std::string& error_msg)
{
#ifdef DEBUG
    a8::UdpLog::Instance()->Debug
        (
         "on dberror %s",
         {
             error_msg
         }
         );
#endif
    a8::UdpLog::Instance()->Warning
        (
         "on dberror %s",
         {
             error_msg
         }
         );
}

void DBEngine::Init()
{
    f8::DBPool::Instance()->Init();
    f8::DBPool::Instance()->SetThreadNum(16);
    f8::DBPool::Instance()->on_dberror = OnDBError;
    a8::Timer::Instance()->AddRepeatTimer
        (
         1000 * 3 + (rand() % 3000),
         a8::XParams(),
         [] (const a8::XParams& param)
         {
             DBEngine::Instance()->RefreshIdx();
         }
         );
}

void DBEngine::UnInit()
{
    f8::DBPool::Instance()->UnInit();
}

void DBEngine::ExecAsyncQuery(a8::XObject conn_info,
                              const char* querystr,
                              std::vector<a8::XValue> args,
                              a8::XParams param,
                              f8::AsyncDBOnOkFunc on_ok,
                              f8::AsyncDBOnErrorFunc on_error,
                              long long hash_code)
{
    f8::DBPool::Instance()->ExecAsyncQuery(
                                           conn_info,
                                           querystr,
                                           args,
                                           param,
                                           on_ok,
                                           on_error,
                                           hash_code
                                           );
}

void DBEngine::ExecAsyncScript(a8::XObject conn_info,
                               const char* querystr,
                               std::vector<a8::XValue> args,
                               a8::XParams param,
                               f8::AsyncDBOnOkFunc on_ok,
                               f8::AsyncDBOnErrorFunc on_error,
                               long long hash_code)
{
    f8::DBPool::Instance()->ExecAsyncScript(
                                            conn_info,
                                            querystr,
                                            args,
                                            param,
                                            on_ok,
                                            on_error,
                                            hash_code
                                            );
}

a8::XObject DBEngine::GetConnInfo(const std::string& data)
{
    return GetConnInfo(a8::openssl::Crc32((unsigned char*)data.data(), data.size()));
}

a8::XObject DBEngine::GetConnInfo(long long data)
{
    std::shared_ptr<a8::XObject> mysql_cluster_conf =
        JsonDataMgr::Instance()->GetMysqlClusterConf();
    if (mysql_cluster_conf->Size() <= 0) {
        abort();
    }
    a8::XObject conn_info = *(mysql_cluster_conf->At(data % mysql_cluster_conf->Size()));
    return conn_info;
}

void DBEngine::UpdateFriendApplyIdx(long long crc32_code, long long new_idx)
{
    if (GetFriendApplyCurrIdx(crc32_code) < new_idx) {
        friend_apply_idx_hash_[GetInstanceId(crc32_code)] = new_idx;
    }
}

long long DBEngine::GetFriendApplyCurrIdx(long long crc32_code)
{
    auto itr = friend_apply_idx_hash_.find(GetInstanceId(crc32_code));
    return itr != friend_apply_idx_hash_.end() ? itr->second : 0;
}

void DBEngine::UpdateGroupApplyIdx(long long crc32_code, long long new_idx)
{
    if (GetGroupApplyCurrIdx(crc32_code) < new_idx) {
        group_apply_idx_hash_[GetInstanceId(crc32_code)] = new_idx;
    }
}

long long DBEngine::GetGroupApplyCurrIdx(long long crc32_code)
{
    auto itr = group_apply_idx_hash_.find(GetInstanceId(crc32_code));
    return itr != group_apply_idx_hash_.end() ? itr->second : 0;
}

long long DBEngine::GetEventCurrIdx(long long crc32_code)
{
    auto itr = event_idx_hash_.find(GetInstanceId(crc32_code));
    return itr != event_idx_hash_.end() ? itr->second : 0;
}

void DBEngine::UpdateEventIdx(long long crc32_code, long long new_idx)
{
    if (GetEventCurrIdx(crc32_code) < new_idx) {
        event_idx_hash_[crc32_code] = new_idx;
    }
}

int DBEngine::GetInstanceId(long long crc32_code)
{
    std::shared_ptr<a8::XObject> mysql_cluster_conf =
        JsonDataMgr::Instance()->GetMysqlClusterConf();
    if (mysql_cluster_conf->Size() <= 0) {
        abort();
    }
    return (crc32_code % mysql_cluster_conf->Size()) + 1;
}

void DBEngine::RefreshIdx()
{
    std::shared_ptr<a8::XObject> mysql_cluster_conf =
        JsonDataMgr::Instance()->GetMysqlClusterConf();
    if (mysql_cluster_conf->Size() <= 0) {
        abort();
    }

    auto on_ok =
        [] (a8::XParams& param, const f8::DataSet* data_set)
        {
            long long instance_idx = param.sender.GetInt64();
            const std::vector<std::string>& row = (*data_set)[0];
            long long friend_apply_idx = a8::XValue(row[0]);
            long long event_idx = a8::XValue(row[1]);
            DBEngine::Instance()->UpdateFriendApplyIdx(instance_idx, friend_apply_idx);
            DBEngine::Instance()->UpdateEventIdx(instance_idx, event_idx);
        };
    auto on_error =
        [] (a8::XParams& param, int error_code, const std::string& error_msg)
        {
        };

    for (int i = 0; i < mysql_cluster_conf->Size(); ++i) {
        a8::XObject conn_info = GetConnInfo(i);
        DBEngine::Instance()->ExecAsyncQuery
            (
             conn_info,
             "SELECT MAX(idx) FROM friend_apply UNION "
             "SELECT MAX(idx) FROM event;",
             {
             },
             a8::XParams()
             .SetSender(i),
             on_ok,
             on_error,
             i
             );
    }
}