/****************************************************************************
 *                                                                          *
 *  This file is part of guh.                                               *
 *                                                                          *
 *  Guh is free software: you can redistribute it and/or modify             *
 *  it under the terms of the GNU General Public License as published by    *
 *  the Free Software Foundation, version 2 of the License.                 *
 *                                                                          *
 *  Guh is distributed in the hope that it will be useful,                  *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of          *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
 *  GNU General Public License for more details.                            *
 *                                                                          *
 *  You should have received a copy of the GNU General Public License       *
 *  along with guh.  If not, see <http://www.gnu.org/licenses/>.            *
 *                                                                          *
 ***************************************************************************/

#include "jsonhandler.h"

#include <QMetaMethod>
#include <QDebug>

JsonHandler::JsonHandler(QObject *parent) :
    QObject(parent)
{
}

QVariantMap JsonHandler::introspect(QMetaMethod::MethodType type)
{
    QVariantMap data;
    for (int i = 0; i < metaObject()->methodCount(); ++i) {
        QMetaMethod method = metaObject()->method(i);
        qDebug() << "checking method" << method.methodType() << method.methodSignature() << method.name();

        if (method.methodType() != type) {
            continue;
        }

        switch (method.methodType()) {
        case QMetaMethod::Method: {
            if (!m_descriptions.contains(method.name()) || !m_params.contains(method.name()) || !m_returns.contains(method.name())) {
                continue;
            }
            QVariantMap methodData;
            methodData.insert("description", m_descriptions.value(method.name()));
            methodData.insert("params", m_params.value(method.name()));
            methodData.insert("returns", m_returns.value(method.name()));
            data.insert(name() + "." + method.name(), methodData);
            break;
        }
        case QMetaMethod::Signal: {
            if (!m_descriptions.contains(method.name()) || !m_params.contains(method.name())) {
                continue;
            }
            if (QString(method.name()).contains(QRegExp("^[A-Z]"))) {
                qDebug() << "got signal" << method.name();
                QVariantMap methodData;
                methodData.insert("description", m_descriptions.value(method.name()));
                methodData.insert("params", m_params.value(method.name()));
                data.insert(name() + "." + method.name(), methodData);
            }
            break;
        }
        }
    }
    return data;
}

bool JsonHandler::hasMethod(const QString &methodName)
{
    return m_descriptions.contains(methodName) && m_params.contains(methodName) && m_returns.contains(methodName);
}

QPair<bool, QString> JsonHandler::validateParams(const QString &methodName, const QVariantMap &params)
{
    QVariantMap paramTemplate = m_params.value(methodName);
    return JsonTypes::validateMap(paramTemplate, params);
}

QPair<bool, QString> JsonHandler::validateReturns(const QString &methodName, const QVariantMap &returns)
{
    QVariantMap returnsTemplate = m_returns.value(methodName);
    return JsonTypes::validateMap(returnsTemplate, returns);
}

void JsonHandler::setDescription(const QString &methodName, const QString &description)
{
    for(int i = 0; i < metaObject()->methodCount(); ++i) {
        QMetaMethod method = metaObject()->method(i);
        if (method.name() == methodName) {
            m_descriptions.insert(methodName, description);
            return;
        }
    }
    qWarning() << "Cannot set description. No such method:" << methodName;
}

void JsonHandler::setParams(const QString &methodName, const QVariantMap &params)
{
    for(int i = 0; i < metaObject()->methodCount(); ++i) {
        QMetaMethod method = metaObject()->method(i);
        if (method.name() == methodName) {
            m_params.insert(methodName, params);
            return;
        }
    }
    qWarning() << "Cannot set params. No such method:" << methodName;
}

void JsonHandler::setReturns(const QString &methodName, const QVariantMap &returns)
{
    for(int i = 0; i < metaObject()->methodCount(); ++i) {
        QMetaMethod method = metaObject()->method(i);
        if (method.name() == methodName) {
            m_returns.insert(methodName, returns);
            return;
        }
    }
    qWarning() << "Cannot set returns. No such method:" << methodName;
}