/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *                                                                         *
 *  Copyright (C) 2015 Simon Stuerz <simon.stuerz@guh.guru>                *
 *                                                                         *
 *  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 "pluginsresource.h"
#include "httprequest.h"
#include "loggingcategories.h"
#include "guhcore.h"

#include <QJsonDocument>

namespace guhserver {

PluginsResource::PluginsResource(QObject *parent) :
    RestResource(parent)
{

}

QString PluginsResource::name() const
{
    return "plugins";
}

HttpReply *PluginsResource::proccessRequest(const HttpRequest &request, const QStringList &urlTokens)
{
    // get the main resource

    // /api/v1/plugins/{pluginId}/
    if (urlTokens.count() >= 4) {
        m_pluginId = PluginId(urlTokens.at(3));
        if (m_pluginId.isNull()) {
            qCWarning(dcRest) << "Could not parse PluginId:" << urlTokens.at(3);
            return createErrorReply(HttpReply::BadRequest);
        }
    }

    // check method
    HttpReply *reply;
    switch (request.method()) {
    case HttpRequest::Get:
        reply = proccessGetRequest(request, urlTokens);
        break;
    case HttpRequest::Put:
        reply = proccessPutRequest(request, urlTokens);
        break;
    default:
        reply = createErrorReply(HttpReply::BadRequest);
        break;
    }
    return reply;
}

HttpReply *PluginsResource::proccessGetRequest(const HttpRequest &request, const QStringList &urlTokens)
{
    Q_UNUSED(request)

    // GET /api/v1/plugins
    if (urlTokens.count() == 3)
        return getPlugins();

    // GET /api/v1/plugins/{pluginId}
    if (urlTokens.count() == 4)
        return getPlugin(m_pluginId);

    // GET /api/v1/plugins/{pluginId}/configuration
    if (urlTokens.count() == 5 && urlTokens.at(4) == "configuration") {
        return getPluginConfiguration(m_pluginId);
    }

    return createErrorReply(HttpReply::NotImplemented);
}

HttpReply *PluginsResource::proccessPutRequest(const HttpRequest &request, const QStringList &urlTokens)
{
    // PUT /api/v1/plugins/{pluginId}/configuration
    if (urlTokens.count() == 5 && urlTokens.at(4) == "configuration") {
        return setPluginConfiguration(m_pluginId, request.payload());
    }

    return createErrorReply(HttpReply::NotImplemented);
}

HttpReply *PluginsResource::getPlugins() const
{
    qCDebug(dcRest) << "Get plugins";
    HttpReply *reply = createSuccessReply();
    reply->setPayload(QJsonDocument::fromVariant(JsonTypes::packPlugins()).toJson());
    return reply;
}

HttpReply *PluginsResource::getPlugin(const PluginId &pluginId) const
{
    qCDebug(dcRest) << "Get plugin with id" << pluginId;
    HttpReply *reply = createSuccessReply();
    foreach (DevicePlugin *plugin, GuhCore::instance()->plugins()) {
        if (plugin->pluginId() == pluginId) {
            reply->setPayload(QJsonDocument::fromVariant(JsonTypes::packPlugin(plugin)).toJson());
            return reply;
        }
    }
    return createErrorReply(HttpReply::NotFound);
}

HttpReply *PluginsResource::getPluginConfiguration(const PluginId &pluginId) const
{
    qCDebug(dcRest) << "Get configuration of plugin with id" << pluginId.toString();

    DevicePlugin *plugin = 0;
    plugin = findPlugin(pluginId);
    if (!plugin)
        return createErrorReply(HttpReply::NotFound);

    QVariantList configurationParamsList;
    foreach (const Param &param, plugin->configuration()) {
        configurationParamsList.append(JsonTypes::packParam(param));
    }

    HttpReply *reply = createSuccessReply();
    reply->setPayload(QJsonDocument::fromVariant(configurationParamsList).toJson());
    return reply;
}

HttpReply *PluginsResource::setPluginConfiguration(const PluginId &pluginId, const QByteArray &payload) const
{
    DevicePlugin *plugin = 0;
    plugin = findPlugin(pluginId);
    if (!plugin)
        return createErrorReply(HttpReply::NotFound);

    qCDebug(dcRest) << "Set configuration of plugin with id" << pluginId.toString();

    QPair<bool, QVariant> verification = RestResource::verifyPayload(payload);
    if (!verification.first)
        return createErrorReply(HttpReply::BadRequest);

    QVariantList configuration = verification.second.toList();
    ParamList pluginParams = JsonTypes::unpackParams(configuration);
    qCDebug(dcRest) << pluginParams;
    DeviceManager::DeviceError result = GuhCore::instance()->setPluginConfig(pluginId, pluginParams);

    if (result != DeviceManager::DeviceErrorNoError)
        return createErrorReply(HttpReply::BadRequest);

    return createSuccessReply();
}

DevicePlugin *PluginsResource::findPlugin(const PluginId &pluginId) const
{
    foreach (DevicePlugin *plugin, GuhCore::instance()->plugins()) {
        if (plugin->pluginId() == pluginId) {
            return plugin;
        }
    }
    return 0;
}

}