/***************************************************************************
 *   This file is part of the Lime Report project                          *
 *   Copyright (C) 2015 by Alexander Arin                                  *
 *   arin_a@bk.ru                                                          *
 *                                                                         *
 **                   GNU General Public License Usage                    **
 *                                                                         *
 *   This library 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 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 *                                                                         *
 **                  GNU Lesser General Public License                    **
 *                                                                         *
 *   This library is free software: you can redistribute it and/or modify  *
 *   it under the terms of the GNU Lesser General Public License as        *
 *   published by the Free Software Foundation, either version 3 of the    *
 *   License, or (at your option) any later version.                       *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library.                                      *
 *   If not, see <http://www.gnu.org/licenses/>.                           *
 *                                                                         *
 *   This library 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.                          *
 ****************************************************************************/
#include "lrsqleditdialog.h"
#include "ui_lrsqleditdialog.h"
#include "lrreportengine_p.h"

#include <QDebug>
#include <QSqlDatabase>
#include <QMessageBox>

namespace LimeReport{

SQLEditDialog::SQLEditDialog(QWidget *parent, LimeReport::DataSourceManager *dataSources, SQLDialogMode dialogMode) :
    QDialog(parent),
    ui(new Ui::SQLEditDialog),m_datasources(dataSources),m_dialogMode(dialogMode), m_oldDatasourceName(""),
    m_settings(0), m_ownedSettings(false)
{
    ui->setupUi(this);
    m_masterDatasources = new QCompleter(this);
    ui->leMaster->setCompleter(m_masterDatasources);
    ui->leChild->setCompleter(m_masterDatasources);
    ui->gbFieldsMap->setVisible(false);
    ui->gbDataPreview->setVisible(false);
    ui->pbHidePreview->setVisible(false);
    ui->rbSubQuery->setChecked(true);
    ui->rbProxy->setVisible(false);
    ui->rbSubQuery->setVisible(false);
    ui->leMaster->setVisible(false);
    ui->lbMaster->setVisible(false);
    ui->fieldsMap->setHorizontalHeaderItem(0,new QTableWidgetItem("master"));
    ui->fieldsMap->setHorizontalHeaderItem(1,new QTableWidgetItem("detail"));

#ifdef HAVE_QT5
    ui->fieldsMap->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
#else
    ui->fieldsMap->horizontalHeader()->setResizeMode(QHeaderView::Stretch);
#endif
    ui->pnlChildDatasource->setVisible(false);
    connect(ui->pbPreview, SIGNAL(pressed()), this, SLOT(slotPreviewData()));
    connect(ui->pbHidePreview, SIGNAL(pressed()), this, SLOT(slotHidePreview()));
}

SQLEditDialog::~SQLEditDialog()
{
    delete ui;
    if (m_settings && m_ownedSettings)
        delete m_settings;
}

QSettings *SQLEditDialog::settings(){
    if (m_settings){
        return m_settings;
    } else {
        m_settings = new QSettings("LimeReport",QApplication::applicationName());
        m_ownedSettings = true;
        return m_settings;
    }
}

void SQLEditDialog::setSettings(QSettings *value, bool owned){
    if (m_settings && m_ownedSettings) delete m_settings;
    m_settings=value;
    m_ownedSettings = owned;
}

void SQLEditDialog::accept()
{
    SQLEditResult result;

    if (!ui->cbSubdetail->isChecked()){
        result.resultMode=SQLEditResult::Query;
    } else {
        if (ui->rbSubQuery->isChecked()) result.resultMode=SQLEditResult::SubQuery;
        else result.resultMode=SQLEditResult::SubProxy;
    }

    result.connectionName = ConnectionDesc::connectionNameForReport(ui->cbbConnection->currentText());
    result.datasourceName=ui->leDatasourceName->text();
    result.sql=ui->textEditSQL->toPlainText();
    result.dialogMode=m_dialogMode;
    result.oldDatasourceName=m_oldDatasourceName;
    result.subdetail = ui->cbSubdetail->isChecked();
    result.masterDatasource=ui->leMaster->text();
    result.childDataSource=ui->leChild->text();

    if (ui->fieldsMap->rowCount()>0){
        for(int i=0;i<ui->fieldsMap->rowCount();++i){
            LimeReport::FieldsCorrelation fieldsCorrelation;
            fieldsCorrelation.master=ui->fieldsMap->item(i,0)->data(Qt::DisplayRole).toString();
            fieldsCorrelation.detail=ui->fieldsMap->item(i,1)->data(Qt::DisplayRole).toString();
            result.fieldMap.append(fieldsCorrelation);
        }
    }

    try {
        check();
        emit signalSqlEditingFinished(result);
        QDialog::accept();
    }catch(LimeReport::ReportError &exception){
        QMessageBox::critical(this,tr("Error"),exception.what());
    }
}

void SQLEditDialog::showEvent(QShowEvent *)
{
    ui->lblInfo->setVisible(false);
    initConnections();
    readSettings();
}

void SQLEditDialog::closeEvent(QCloseEvent *)
{
    writeSetting();
}

void SQLEditDialog::hideEvent(QHideEvent *)
{
    writeSetting();
}

void SQLEditDialog::check()
{
    if (ui->leDatasourceName->text().isEmpty()) throw LimeReport::ReportError(tr("Datasource Name is empty!"));
    if (ui->textEditSQL->toPlainText().isEmpty() && (!ui->rbProxy) ) throw LimeReport::ReportError(tr("SQL is empty!"));
    if (m_dialogMode==AddMode){
        if (m_datasources->containsDatasource(ui->leDatasourceName->text())){
            throw LimeReport::ReportError(QString(tr("Datasource with name: \"%1\" already exists!")).arg(ui->leDatasourceName->text()));
        }
    }
}

void SQLEditDialog::initConnections()
{
    foreach(QString connectionName, QSqlDatabase::connectionNames()){
        ui->cbbConnection->addItem(QIcon(":/databrowser/images/plug-connect.png"),ConnectionDesc::connectionNameForUser(connectionName));
    }

    foreach(QString connectionName, m_datasources->connectionNames()){
        connectionName = (connectionName.compare(QSqlDatabase::defaultConnection)==0) ?
                         tr("defaultConnection") : connectionName;
        if (ui->cbbConnection->findText(connectionName,Qt::MatchExactly )==-1)
            ui->cbbConnection->addItem(QIcon(":/databrowser/images/plug-disconnect.png"),ConnectionDesc::connectionNameForUser(connectionName));
    }

    ui->cbbConnection->setCurrentIndex(ui->cbbConnection->findText(m_defaultConnection));
    if (!m_oldDatasourceName.isEmpty()){
        ui->cbbConnection->setCurrentIndex(ui->cbbConnection->findText(ConnectionDesc::connectionNameForUser(m_datasources->connectionName(m_oldDatasourceName))));
    }
}

void SQLEditDialog::setDataSources(LimeReport::DataSourceManager *dataSources, QString datasourceName)
{
    m_datasources=dataSources;
    if (!datasourceName.isEmpty()){
        ui->cbSubdetail->setEnabled(false);
        initQueryMode();
        m_oldDatasourceName=datasourceName;
        ui->leDatasourceName->setText(datasourceName);
        ui->textEditSQL->setText(dataSources->queryText(datasourceName));
        if (dataSources->isSubQuery(datasourceName)){
            initSubQueryMode();
            ui->leMaster->setText(dataSources->subQueryByName(datasourceName)->master());
        }
        if (dataSources->isProxy(datasourceName)){
            initProxyMode();
            LimeReport::ProxyDesc* proxyDesc = dataSources->proxyByName(datasourceName);
            ui->leChild->setText(proxyDesc->child());
            ui->leMaster->setText(proxyDesc->master());
            int curIndex=0;
            foreach(LimeReport::FieldMapDesc* fields, *proxyDesc->fieldsMap()){
                ui->fieldsMap->setRowCount(curIndex+1);
                ui->fieldsMap->setItem(curIndex,0,new QTableWidgetItem(fields->master()));
                ui->fieldsMap->setItem(curIndex,1,new QTableWidgetItem(fields->detail()));
                curIndex++;
            }
        }
    }
}

void SQLEditDialog::setDefaultConnection(QString defaultConnection)
{
    m_defaultConnection = ConnectionDesc::connectionNameForUser(defaultConnection);
}

void SQLEditDialog::slotDataSourceNameEditing()
{
    if (m_dialogMode==AddMode){
        QPalette palette=ui->leDatasourceName->palette();
        if (m_datasources->containsDatasource(ui->leDatasourceName->text())){
            palette.setColor(QPalette::Text,Qt::red);
            ui->leDatasourceName->setPalette(palette);
            ui->lblInfo->setText(QString(tr("Datasource with name %1 already exist")).arg(ui->leDatasourceName->text()));
            ui->lblInfo->setVisible(true);
        } else {
            palette.setColor(QPalette::Text,QApplication::palette().text().color());
            ui->leDatasourceName->setPalette(palette);
            ui->lblInfo->setVisible(false);
        }
    }
}

void SQLEditDialog::on_cbSubdetail_clicked(bool checked)
{
    if (checked){
        m_masterDatasources->setModel(new QStringListModel(m_datasources->dataSourceNames(),m_datasources));
    }
    ui->leMaster->setEnabled(checked);
    ui->rbProxy->setEnabled(checked);
    ui->rbSubQuery->setEnabled(checked);
    if ((checked)&&(ui->rbProxy->isChecked())) initProxyMode();
    if ((checked)&&(ui->rbSubQuery->isChecked())) initSubQueryMode();
    if (!checked) initQueryMode();
}

void SQLEditDialog::on_rbProxy_clicked(bool checked)
{
    if (checked) initProxyMode();
}

void SQLEditDialog::on_rbSubQuery_clicked(bool checked)
{
    if (checked) initSubQueryMode();
}

void SQLEditDialog::on_pbAddField_clicked()
{
    ui->fieldsMap->setRowCount(ui->fieldsMap->rowCount()+1);
}

void SQLEditDialog::initQueryMode()
{
    ui->gbSQL->setVisible(true);
    ui->gbFieldsMap->setVisible(false);
    ui->pnlChildDatasource->setVisible(false);
    ui->rbSubQuery->setVisible(false);
    ui->rbProxy->setVisible(false);
    ui->cbSubdetail->setChecked(false);
    ui->leMaster->setVisible(false);
    ui->lbMaster->setVisible(false);
}

void SQLEditDialog::initSubQueryMode()
{
    ui->gbSQL->setVisible(true);
    ui->gbFieldsMap->setVisible(false);
    ui->pnlChildDatasource->setVisible(false);
    ui->rbSubQuery->setChecked(true);
    ui->cbSubdetail->setChecked(true);
    ui->rbSubQuery->setVisible(true);
    ui->rbProxy->setVisible(true);
    ui->leMaster->setVisible(true);
    ui->leMaster->setEnabled(true);
    ui->lbMaster->setVisible(true);

}

void SQLEditDialog::initProxyMode()
{
    ui->gbSQL->setVisible(false);
    ui->gbFieldsMap->setVisible(true);
    ui->pnlChildDatasource->setVisible(true);
    ui->rbProxy->setChecked(true);
    ui->cbSubdetail->setChecked(true);
    ui->rbSubQuery->setVisible(true);
    ui->rbProxy->setVisible(true);
    ui->leMaster->setVisible(true);
    ui->leMaster->setEnabled(true);
    ui->lbMaster->setVisible(true);
    ui->cbSubdetail->setEnabled(false);
}

void SQLEditDialog::slotPreviewData()
{
    if (ui->cbbConnection->currentText().isEmpty()){
        QMessageBox::critical(this,tr("Attention"),tr("Connection is not specified"));
        return;
    }
    m_previewModel = m_datasources->previewSQL(
                ConnectionDesc::connectionNameForReport(ui->cbbConnection->currentText()),
                ui->textEditSQL->toPlainText(),
                ui->leMaster->text()
    );
    if (m_previewModel){
        ui->tvPreview->setModel(m_previewModel.data());
        ui->gbDataPreview->setVisible(true);
        ui->pbPreview->setText(tr("Refresh"));
        ui->pbHidePreview->setVisible(true);
    } else {
        if (ui->gbDataPreview->isVisible())
            hidePreview();
        QMessageBox::critical(this,tr("Attention"),m_datasources->lastError());
    }
}

void SQLEditDialog::slotHidePreview()
{
    hidePreview();
}

void SQLEditDialog::writeSetting()
{
    if (settings()!=0){
        settings()->beginGroup("SQLEditor");
        settings()->setValue("Geometry",saveGeometry());
        settings()->endGroup();
    }
}

void SQLEditDialog::readSettings()
{
    if (settings()==0) return;
    settings()->beginGroup("SQLEditor");
    QVariant v = settings()->value("Geometry");
    if (v.isValid()){
        restoreGeometry(v.toByteArray());
    }
    settings()->endGroup();
}

void SQLEditDialog::hidePreview()
{
    ui->gbDataPreview->setVisible(false);
    ui->pbPreview->setText(tr("Preview"));
    ui->pbHidePreview->setVisible(false);
}

} // namespace LimeReport