/*
 * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
 *
 * 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.
 */

#include <functional>
#include <QUrl>
#include <QDebug>
#include <QJsonDocument>
#include <QJsonObject>
#include <QQuickWindow>
#include <cstring>

#include "eventhandler.h"

void* EventHandler::myThis = 0;

EventHandler::EventHandler(QObject *parent) :
    QObject(parent),
    mp_hs(NULL),
    mp_wm(NULL),
    mp_qw(NULL)
{
    m_dspreq = QString("");
    my_id = QString(APP_ID);
    my_role = QString(ROLE_NAME);
    m_req.clear();
}

EventHandler::~EventHandler()
{
    if (mp_hs != NULL) {
        delete mp_hs;
    }
    if (mp_wm != NULL) {
        delete mp_wm;
    }
}

void EventHandler::init(int port, const char *token)
{
    myThis = this;
    mp_wm = new QLibWindowmanager();
    mp_wm->init(port, token);

    mp_hs = new LibHomeScreen();
    mp_hs->init(port, token);
    
//    my_id = QString(std::strtok(std::getenv("AFM_ID"), "@"));
    mp_hs->registerCallback(nullptr, EventHandler::onRep_static);
    mp_hs->set_event_handler(LibHomeScreen::Event_ShowWindow, [this](json_object *object){
        // {"id": "onscreenXXX", "parameter": {"replyid": "app's id", "file": "onsreen file path", "data": {"key": "value", ...}}}
        struct json_object *appid;
        json_object_object_get_ex(object, "application_id", &appid);
        const char *id = json_object_get_string(appid);
        if(my_id != QString(id)) {
            HMI_DEBUG(APP_ID, "Event_ShowWindow id = %s", id);
            return;
        }
        else
            HMI_DEBUG(APP_ID, "recived json message is[%s]", json_object_get_string(object));

        struct json_object *param;
        json_object_object_get_ex(object, "parameter", &param);
        if(json_object_get_type(param) != json_type_object ) {
            HMI_DEBUG(APP_ID, "parameter error!");
            return;
        }

        struct json_object *replyid;
        json_object_object_get_ex(param, "replyid", &replyid);
        const char *_replyid = json_object_get_string(replyid);

        struct json_object *path;
        json_object_object_get_ex(param, "file", &path);
        const char *_path = json_object_get_string(path);

        struct json_object *data;
        json_bool rtn = json_object_object_get_ex(param, "data", &data);
        const char* _data = "";
        if(rtn) {
            _data = json_object_to_json_string(data);
        }

        m_dspreq = QString(_replyid);
        if(m_req.contains(m_dspreq)) {
            m_req[m_dspreq] = qMakePair(QString(_path), QString(_data));
        }
        else
            m_req.insert(QString(m_dspreq), qMakePair(QString(_path), QString(_data)));

        this->mp_wm->activateWindow(ROLE_NAME);
        HMI_DEBUG(APP_ID, "received showWindow event, end!, line=%d", __LINE__);
    });

    mp_hs->set_event_handler(LibHomeScreen::Event_HideWindow, [this](json_object *object){
        struct json_object *value;
        json_object_object_get_ex(object, "application_id", &value);
        const char *appid = json_object_get_string(value);

        HMI_DEBUG(APP_ID, "release onScreen is %s!", appid);

        if (appid == my_id) {
            emit this->signalLoader(QVariant(""));
            this->mp_wm->deactivateWindow(ROLE_NAME);
        }
        else {
            HMI_DEBUG(APP_ID, "!!!!releaseOnScreen is not displaying!!!!!");
        }
    });

    if (mp_wm->requestSurface(ROLE_NAME) != 0) {
        HMI_DEBUG(APP_ID, "!!!!LayoutHandler requestSurface Failed!!!!!");
        exit(EXIT_FAILURE);
    }

    mp_wm->set_event_handler(QLibWindowmanager::Event_SyncDraw, [this](json_object *object) {
        HMI_DEBUG(APP_ID, "Surface %s got syncDraw!", ROLE_NAME);
        emit this->signalLoader(QVariant("file://" + m_req[m_dspreq].first));
        emit this->signalOnScreenParameter(QVariant(m_req[m_dspreq].second));
        this->mp_wm->endDraw(QString(ROLE_NAME));
    });

    mp_wm->set_event_handler(QLibWindowmanager::Event_Visible, [this](json_object *object) {
        struct json_object *value;
        json_object_object_get_ex(object, "drawing_name", &value);
        const char *name = json_object_get_string(value);

        HMI_DEBUG(APP_ID, "Event_Visible kKeyDrawingName = %s", name);
    });

    mp_wm->set_event_handler(QLibWindowmanager::Event_Invisible, [this](json_object *object) {
        struct json_object *value;
        json_object_object_get_ex(object, "drawing_name", &value);
        const char *name = json_object_get_string(value);

        HMI_DEBUG(APP_ID, "Event_Invisible kKeyDrawingName = %s", name);
    });

    HMI_DEBUG(APP_ID, "LayoutHander::init() finished.");
}

void EventHandler::setQuickWindow(QQuickWindow *qw)
{
    mp_qw = qw;
}

void EventHandler::onRep_static(struct json_object* reply_contents)
{
    static_cast<EventHandler*>(EventHandler::myThis)->onRep(reply_contents);
}
void EventHandler::onRep(struct json_object* reply_contents)
{
    const char* str = json_object_to_json_string(reply_contents);
    HMI_DEBUG(APP_ID, "EventHandler::onReply %s", str);
}

void EventHandler::activateWindow(QString &role)
{
    HMI_DEBUG(APP_ID, "EventHandler::activateWindow()");
    mp_wm->activateWindow(role);
}

void EventHandler::deactivateWindow(QString &role)
{
    HMI_DEBUG(APP_ID, "EventHandler::deactivateWindow()");

    emit this->signalLoader(QVariant(""));
    mp_wm->deactivateWindow(role);
}

void EventHandler::onScreenReply(const QString &btn_name)
{
    HMI_DEBUG(APP_ID, "EventHandler::onScreenReply()");
    deactivateWindow(my_role);

    struct json_object* j_obj = json_object_new_object();
    json_object_object_add(j_obj, "application_id", json_object_new_string(m_dspreq.toLatin1()));

    struct json_object* j_param = json_object_new_object();
    json_object_object_add(j_param, "method", json_object_new_string("Buttons.ButtonPress"));
    json_object_object_add(j_param, "buttonName", json_object_new_string(btn_name.toStdString().c_str()));
    json_object_object_add(j_param, "buttonPressMode", json_object_new_string("Short"));
    json_object_object_add(j_obj, "parameter", j_param);

    mp_hs->replyShowWindow(m_dspreq.toLatin1(), j_obj);
}