/*
 * searchdlg.cpp
 * Copyright (C) 2001, 2002  Justin Karneges
 *
 * 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 */

#include <QDomElement>
#include <QPointer>
#include <QLineEdit>
#include <QMessageBox>

#include "jidutil.h"
#include "psiaccount.h"
#include "common.h"
#include "xdata_widget.h"
#include "xmpp_tasks.h"
#include "xmpp_xdata.h"
#include "xmpp_xmlcommon.h"
#include "textutil.h"
#include "searchdlg.h"

using namespace XMPP;

//----------------------------------------------------------------------------
// JT_XSearch
//----------------------------------------------------------------------------

class JT_XSearch : public JT_Search
{
    Q_OBJECT
public:
    JT_XSearch(Task *parent);

    void setForm(const Form &frm, const XData &_form);

    bool take(const QDomElement &);
    QDomElement iq() const;

    void onGo();

private:
    QDomElement _iq;
};

JT_XSearch::JT_XSearch( Task *parent )
    : JT_Search( parent )
{
}

bool JT_XSearch::take( const QDomElement &x )
{
    _iq = x;

    return JT_Search::take( x );
}

QDomElement JT_XSearch::iq() const
{
    return _iq;
}

void JT_XSearch::setForm(const Form &frm, const XData &_form)
{
    JT_Search::set( frm );

    _iq = createIQ(doc(), "set", frm.jid().full(), id());
    QDomElement query = doc()->createElement("query");
    query.setAttribute("xmlns", "jabber:iq:search");
    _iq.appendChild(query);

    XData form( _form );
    form.setType( XData::Data_Submit );
    query.appendChild( form.toXml( doc() ) );
}

void JT_XSearch::onGo()
{
    if ( !_iq.isNull() )
        send( _iq );
    else
        JT_Search::onGo();
}

//----------------------------------------------------------------------------
// SearchDlg
//----------------------------------------------------------------------------
class SearchDlg::Private
{
public:
    Private(SearchDlg* _dlg)
        : dlg(_dlg)
    {}

    struct NickAndJid {
        QString nick;
        XMPP::Jid jid;
    };

    QList<NickAndJid> selectedNicksAndJids() const
    {
        QList<NickAndJid> result;

        int jid;
        int nick;
        if (!xdata) {
            jid  = 4;
            nick = 0;
        }
        else {
            jid  = 0;
            nick = 0;

            int i = 0;
            QList<XData::ReportField>::ConstIterator it = xdata_form.report().begin();
            for (; it != xdata_form.report().end(); ++it, ++i) {
                QString name = (*it).name;
                if (name == "jid")
                    jid = i;

                if (name == "nickname" || name == "nick" || name == "title")
                    nick = i;
            }
        }

        foreach(QTreeWidgetItem* i, dlg->lv_results->selectedItems()) {
            NickAndJid nickJid;
            nickJid.jid  = XMPP::Jid(i->text(jid));
            nickJid.nick = i->text(nick);
            result << nickJid;
        }

        return result;
    }

    SearchDlg *dlg;
    PsiAccount *pa = nullptr;
    Jid jid;
    Form form;
    BusyWidget *busy = nullptr;
    QPointer<JT_XSearch> jt;
    QWidget *gr_form = nullptr;
    QGridLayout *gr_form_layout = nullptr;
    int type = 0;

    QList<QLabel*> lb_field;
    QList<QLineEdit*> le_field;
    XDataWidget *xdata = nullptr;
    XData xdata_form;
    QScrollArea *scrollArea = nullptr;

};

SearchDlg::SearchDlg(const Jid &jid, PsiAccount *pa)
    : QDialog(nullptr)
{
    setAttribute(Qt::WA_DeleteOnClose);
    d = new Private(this);
    setupUi(this);
    setModal(false);
    d->pa = pa;
    d->jid = jid;
    d->pa->dialogRegister(this, d->jid);
    d->jt = 0;
    d->xdata = 0;
    d->scrollArea = scrollArea;


    setWindowTitle(windowTitle().arg(d->jid.full()));

    setWindowFlags(Qt::Dialog | Qt::WindowTitleHint | Qt::WindowMinimizeButtonHint | Qt::WindowMaximizeButtonHint | Qt::WindowCloseButtonHint | Qt::CustomizeWindowHint);
    d->busy = busy;

    d->gr_form = new QWidget(gb_search);
    d->gr_form_layout = new QGridLayout(d->gr_form);
    d->gr_form_layout->setSpacing(0);
    d->scrollArea->setWidget(d->gr_form);
    d->gr_form->hide();

    pb_add->setEnabled(false);
    pb_info->setEnabled(false);
    pb_stop->setEnabled(false);
    pb_search->setEnabled(false);

    connect(lv_results, SIGNAL(itemSelectionChanged()), SLOT(selectionChanged()));
    connect(lv_results, SIGNAL(itemActivated(QTreeWidgetItem*, int)), SLOT(itemActivated(QTreeWidgetItem*, int)));
    connect(pb_close, SIGNAL(clicked()), SLOT(close()));
    connect(pb_search, SIGNAL(clicked()), SLOT(doSearchSet()));
    connect(pb_stop, SIGNAL(clicked()), SLOT(doStop()));
    connect(pb_add, SIGNAL(clicked()), SLOT(doAdd()));
    connect(pb_info, SIGNAL(clicked()), SLOT(doInfo()));

    resize(600,440);

    doSearchGet();
}

SearchDlg::~SearchDlg()
{
    delete d->jt;
    d->pa->dialogUnregister(this);
    delete d;
}

/*void SearchDlg::localUpdate(const JabRosterEntry &e)
{
    int oldstate = localStatus;
    localStatus = e.localStatus();

    if(localStatus == STATUS_OFFLINE) {
        if(isBusy) {
            busy->stop();
            isBusy = FALSE;
        }

        pb_search->setEnabled(FALSE);
        pb_stop->setEnabled(FALSE);
        clear();
    }
    else {
        // coming online?
        if(oldstate == STATUS_OFFLINE) {
            pb_search->setEnabled(TRUE);
        }
    }
}*/

void SearchDlg::addEntry(const QString &jid, const QString &nick, const QString &first, const QString &last, const QString &email)
{
    QTreeWidgetItem* lvi = new QTreeWidgetItem(lv_results);
    lvi->setText(0, nick);
    lvi->setText(1, first);
    lvi->setText(2, last);
    lvi->setText(3, email);
    lvi->setText(4, jid);
}

void SearchDlg::doSearchGet()
{
    lb_instructions->setText(tr("<qt>Fetching search form for %1 ...</qt>").arg(d->jid.full()));
    d->busy->start();

    d->type = 0;
    d->jt = new JT_XSearch(d->pa->client()->rootTask());
    connect(d->jt, SIGNAL(finished()), SLOT(jt_finished()));
    d->jt->get(d->jid);
    d->jt->go(true);
}

void SearchDlg::doSearchSet()
{
    if(d->busy->isActive())
        return;

    if(!d->pa->checkConnected(this))
        return;

    d->jt = new JT_XSearch(d->pa->client()->rootTask());

    if ( !d->xdata ) {
        Form submitForm = d->form;

        Q_ASSERT(submitForm.count() == d->le_field.count());
        // import the changes back into the form.
        // the QPtrList of QLineEdits should be in the same order
        for (int i = 0; i < submitForm.count(); ++i) {
            submitForm[i].setValue(d->le_field[i]->text());
        }

        d->jt->set(submitForm);
    }
    else {
        XData form;
        form.setFields( d->xdata->fields() );

        d->jt->setForm( d->form, form );
    }

    clear();

    pb_search->setEnabled(false);
    pb_stop->setEnabled(true);
    d->gr_form->setEnabled(false);
    d->busy->start();

    d->type = 1;
    connect(d->jt, SIGNAL(finished()), SLOT(jt_finished()));
    d->jt->go(true);
}

void SearchDlg::jt_finished()
{
    d->busy->stop();
    JT_XSearch *jt = d->jt;
    d->jt = 0;

    if(d->type == 1) {
        d->gr_form->setEnabled(true);
        pb_search->setEnabled(true);
        pb_stop->setEnabled(false);
    }

    if(jt->success()) {
        if(d->type == 0) {
            d->form = jt->form();

            bool useXData = false;
            {
                QDomNode n = queryTag( jt->iq() ).firstChild();
                for( ; !n.isNull(); n = n.nextSibling()) {
                    QDomElement i = n.toElement();
                    if(i.isNull())
                        continue;

                    if( i.attribute( "xmlns" ) == "jabber:x:data" ) {
                        useXData = true;

                        XData form;
                        form.fromXml( i );

                        //if ( !form.title().isEmpty() )
                        //    setWindowTitle( form.title() );

                        QString str = TextUtil::plain2rich( form.instructions() );
                        lb_instructions->setText(str);

                        d->xdata = new XDataWidget(d->pa->psi(), d->gr_form, d->pa->client(), d->form.jid() );
                        d->gr_form_layout->addWidget(d->xdata); // FIXME
                        d->xdata->setForm( form, false );

                        d->xdata->show();

                        break;
                    }
                }
            }

            if ( !useXData ) {
                QString str = TextUtil::plain2rich(d->form.instructions());
                lb_instructions->setText(str);

                for(Form::ConstIterator it = d->form.begin(); it != d->form.end(); ++it) {
                    const FormField &f = *it;

                    QLabel *lb = new QLabel(f.fieldName(), d->gr_form);
                    QLineEdit *le = new QLineEdit(d->gr_form);
                    d->gr_form_layout->addWidget(lb); // FIXME
                    d->gr_form_layout->addWidget(le); // FIXME
                    if(f.isSecret())
                        le->setEchoMode(QLineEdit::Password);
                    le->setText(f.value());

                    d->lb_field.append(lb);
                    d->le_field.append(le);

                    connect(le, SIGNAL(returnPressed()), this, SLOT(doSearchSet()));
                }
            }

            d->gr_form->show();
            pb_search->setEnabled(true);
            show();

            qApp->processEvents();
            resize(sizeHint());
        }
        else {
            lv_results->setUpdatesEnabled(false);

            if ( !d->xdata ) {
                const QList<SearchResult> &list = jt->results();
                if(list.isEmpty())
                    QMessageBox::information(this, tr("Search Results"), tr("Search returned 0 results."));
                else {
                    for(QList<SearchResult>::ConstIterator it = list.begin(); it != list.end(); ++it) {
                        const SearchResult &r = *it;
                        addEntry(r.jid().full(), r.nick(), r.first(), r.last(), r.email());
                    }
                }
            }
            else {
                XData form;
                QDomNode n = queryTag( jt->iq() ).firstChild();
                for( ; !n.isNull(); n = n.nextSibling()) {
                    QDomElement i = n.toElement();
                    if(i.isNull())
                        continue;

                    if( i.attribute( "xmlns" ) == "jabber:x:data" ) {
                        form.fromXml( i );
                        break;
                    }
                }

                QStringList header_labels;
                foreach(XData::ReportField report, form.report()) {
                    header_labels << report.label;
                }

                lv_results->clear();
                lv_results->setColumnCount(0);
                lv_results->setHeaderLabels(header_labels);

                foreach(XData::ReportItem ri, form.reportItems()) {
                    int i = 0;
                    QTreeWidgetItem* lvi = new QTreeWidgetItem(lv_results);
                    foreach(XData::ReportField report, form.report()) {
                        lvi->setText(i++, ri[report.name]);
                    }
                }

                d->xdata_form = form;
            }

            for (int i = 0; i < lv_results->columnCount(); ++i) {
                lv_results->resizeColumnToContents(i);
                lv_results->setColumnWidth(i, qMin(lv_results->columnWidth(i), 300));
            }

            lv_results->sortByColumn(0, Qt::AscendingOrder);
            lv_results->setUpdatesEnabled(true);
        }
    }
    else {
        if(d->type == 0) {
            QMessageBox::critical(this, tr("Error"), tr("Unable to retrieve search form.\nReason: %1").arg(jt->statusString()));
            close();
        }
        else {
            QMessageBox::critical(this, tr("Error"), tr("Error retrieving search results.\nReason: %1").arg(jt->statusString()));
        }
    }
}

void SearchDlg::clear()
{
    lv_results->clear();
    pb_add->setEnabled(false);
    pb_info->setEnabled(false);
}

void SearchDlg::doStop()
{
    if(!d->busy->isActive())
        return;

    delete d->jt;
    d->jt = 0;

    d->busy->stop();
    d->gr_form->setEnabled(true);
    pb_search->setEnabled(true);
    pb_stop->setEnabled(false);
}

void SearchDlg::selectionChanged()
{
    bool enable = !lv_results->selectedItems().isEmpty();
    pb_add->setEnabled(enable);
    pb_info->setEnabled(enable);
}

void SearchDlg::itemActivated(QTreeWidgetItem* item, int column)
{
    Q_UNUSED(item);
    Q_UNUSED(column);
    doInfo();
}

void SearchDlg::doAdd()
{
    QList<Private::NickAndJid> nicksAndJids = d->selectedNicksAndJids();
    if (nicksAndJids.isEmpty())
        return;

    foreach(Private::NickAndJid nickJid, nicksAndJids)
        emit add(nickJid.jid, nickJid.nick, QStringList(), true);

    if (nicksAndJids.count() > 1) {
        QMessageBox::information(this,
                                 tr("Add User: Success"),
                                 tr("Added %n users to your roster.", "", nicksAndJids.count()));
    }
    else {
        QMessageBox::information(this,
                                 tr("Add User: Success"),
                                 tr("Added %1 to your roster.").arg(
                                     JIDUtil::nickOrJid(nicksAndJids.first().nick,
                                                        nicksAndJids.first().jid.full()
                                                       )));
    }
}

void SearchDlg::doInfo()
{
    QList<Private::NickAndJid> nicksAndJids = d->selectedNicksAndJids();
    if (nicksAndJids.isEmpty())
        return;

    foreach(Private::NickAndJid nickJid, nicksAndJids)
        emit aInfo(nickJid.jid);
}

#include "searchdlg.moc"
