/*
 * ahcommanddlg.cpp - Ad-Hoc Command Dialog
 * Copyright (C) 2005  Remko Troncon
 *
 * This program 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

#include "ahcommanddlg.h"

#include "ahcexecutetask.h"
#include "ahcformdlg.h"
#include "busywidget.h"
#include "psiaccount.h"
#include "xmpp_client.h"
#include "xmpp_xmlcommon.h"

#include <QComboBox>
#include <QLabel>
#include <QLayout>
#include <QMessageBox>
#include <QPushButton>

#define AHC_NS "http://jabber.org/protocol/commands"

using namespace XMPP;

// --------------------------------------------------------------------------

static bool operator<(const AHCommandItem &ci1, const AHCommandItem &ci2) { return ci1.name < ci2.name; }

// --------------------------------------------------------------------------
// JT_AHCGetList: A Task to retreive the available commands of a client
// --------------------------------------------------------------------------

class JT_AHCGetList : public Task {
public:
    JT_AHCGetList(Task *t, const Jid &j);

    void onGo();
    bool take(const QDomElement &x);

    const QList<AHCommandItem> &commands() const { return commands_; }

private:
    Jid                  receiver_;
    QList<AHCommandItem> commands_;
};

JT_AHCGetList::JT_AHCGetList(Task *t, const Jid &j) : Task(t), receiver_(j) { }

void JT_AHCGetList::onGo()
{
    QDomElement e = createIQ(doc(), "get", receiver_.full(), id());
    QDomElement q = doc()->createElementNS("http://jabber.org/protocol/disco#items", "query");
    q.setAttribute("node", AHC_NS);
    e.appendChild(q);
    send(e);
}

bool JT_AHCGetList::take(const QDomElement &e)
{
    if (!iqVerify(e, receiver_, id())) {
        return false;
    }

    if (e.attribute("type") == "result") {
        // Extract commands
        commands_.clear();
        QDomElement commands = e.firstChildElement("query");
        if (!commands.isNull()) {
            QString iname = "item";
            for (QDomElement i = commands.firstChildElement(iname); !i.isNull(); i = i.nextSiblingElement(iname)) {
                AHCommandItem ci;
                ci.node = i.attribute("node");
                ci.name = i.attribute("name");
                ci.jid  = i.attribute("jid");
                commands_ += ci;
            }
            std::sort(commands_.begin(), commands_.end());
        }
        setSuccess();
        return true;
    } else {
        setError(e);
        return false;
    }
}

// --------------------------------------------------------------------------
// AHCExecuteTaskWrapper: Wrapper around AHCExecuteTask to separate gui stuff
// --------------------------------------------------------------------------

class AHCExecuteTaskWrapper : public QObject {
    Q_OBJECT

    PsiCon *        psi;
    AHCExecuteTask *task;

public:
    AHCExecuteTaskWrapper(PsiCon *psi, AHCExecuteTask *task) : QObject(task), psi(psi), task(task)
    {
        connect(task, SIGNAL(finished()), SLOT(onFinished()));
    }

private slots:
    void onFinished()
    {
        const AHCommand &c = task->resultCommand();
        if (c.status() == AHCommand::Executing)
            new AHCFormDlg(psi, c, task->receiver(), task->client());
        else if (c.status() == AHCommand::Completed && task->hasCommandPayload())
            new AHCFormDlg(psi, c, task->receiver(), task->client(), true);
    }
};

// --------------------------------------------------------------------------
// JT_AHCommandDlg: Initial command dialog
// --------------------------------------------------------------------------

AHCommandDlg::AHCommandDlg(PsiAccount *pa, const Jid &receiver) : QDialog(nullptr), pa_(pa), receiver_(receiver)
{
    ui_.setupUi(this);
    setAttribute(Qt::WA_DeleteOnClose);

    pb_close   = ui_.buttonBox->button(QDialogButtonBox::Cancel);
    pb_execute = ui_.buttonBox->addButton(tr("Execute"), QDialogButtonBox::AcceptRole);
    connect(pb_execute, SIGNAL(clicked()), SLOT(executeCommand()));
    connect(pb_close, SIGNAL(clicked()), SLOT(close()));
    pb_execute->setDefault(true);

    setWindowTitle(QString("Execute Command (%1)").arg(receiver.full()));

    refreshCommands();
    adjustSize();
}

void AHCommandDlg::refreshCommands()
{
    ui_.cb_commands->clear();
    pb_execute->setEnabled(false);

    ui_.busy->start();
    JT_AHCGetList *t = new JT_AHCGetList(pa_->client()->rootTask(), receiver_);
    connect(t, SIGNAL(finished()), SLOT(listReceived()));
    t->go(true);
}

void AHCommandDlg::listReceived()
{
    JT_AHCGetList *task_list = static_cast<JT_AHCGetList *>(sender());
    for (const AHCommandItem &i : task_list->commands()) {
        ui_.cb_commands->addItem(i.name);
        commands_.append(i);
    }
    pb_execute->setEnabled(ui_.cb_commands->count() > 0);
    ui_.busy->stop();
}

void AHCommandDlg::executeCommand()
{
    if (ui_.cb_commands->count() > 0) {
        ui_.busy->start();
        Jid             to(commands_[ui_.cb_commands->currentIndex()].jid);
        QString         node = commands_[ui_.cb_commands->currentIndex()].node;
        AHCExecuteTask *t    = new AHCExecuteTask(to, AHCommand(node), pa_->client()->rootTask());
        connect(t, SIGNAL(finished()), SLOT(commandExecuted()));
        new AHCExecuteTaskWrapper(pa_->psi(), t);
        t->go(true);
    }
}

void AHCommandDlg::commandExecuted()
{
    ui_.busy->stop();
    close();
}

void AHCommandDlg::executeCommand(PsiCon *psi, XMPP::Client *c, const XMPP::Jid &to, const QString &node)
{
    AHCExecuteTask *t = new AHCExecuteTask(to, AHCommand(node), c->rootTask());
    new AHCExecuteTaskWrapper(psi, t);
    t->go(true);
}

#include "ahcommanddlg.moc"
