/*
 * LCD Image Converter. Converts images and fonts for embedded applications.
 * Copyright (C) 2012 riuson
 * mailto: riuson@gmail.com
 *
 * 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 3 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 <http://www.gnu.org/licenses/
 */

#include "dialogoptions.h"
#include "ui_dialogoptions.h"
//-----------------------------------------------------------------------------
#include <QList>
#include <QStringList>
#include <QInputDialog>
#include <QMessageBox>
#include <QFileDialog>
#include "datacontainer.h"
#include "dialogpreview.h"
#include "setuptabprepare.h"
#include "setuptabmatrix.h"
#include "setuptabreordering.h"
#include "setuptabimage.h"
#include "setuptabfont.h"
#include "setuptabtemplates.h"
#include "preset.h"
//-----------------------------------------------------------------------------
DialogOptions::DialogOptions(DataContainer *dataContainer, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::DialogOptions)
{
    ui->setupUi(this);
    this->mPreview = NULL;

    this->mData = dataContainer;
    this->mPreset = new Preset(this);

    this->mSetupPrepare    = new SetupTabPrepare(this->mPreset, this);
    this->mSetupMatrix     = new SetupTabMatrix(this->mPreset, this);
    this->mSetupReordering = new SetupTabReordering(this->mPreset, this);
    this->mSetupImage      = new SetupTabImage(this->mPreset, this);
    this->mSetupFont       = new SetupTabFont(this->mPreset, this);
    this->mSetupTemplates  = new SetupTabTemplates(this->mPreset, this);

    QString selectedPreset = Preset::selectedName();
    int presetsCount = Preset::presetsList().length();

    // create default presets
    if (presetsCount == 0)
    {
        this->createPresetsDefault();
    }
    else
    {
        if (presetsCount == 1)
        {
            if (Preset::presetsList().at(0) == QString("default"))
            {
                this->createPresetsDefault();
            }
        }
    }

    this->mSetupPrepare->connect(this->mPreset, SIGNAL(changed()), SLOT(matrixChanged()));
    this->mSetupMatrix->connect(this->mPreset, SIGNAL(changed()), SLOT(matrixChanged()));
    this->mSetupReordering->connect(this->mPreset, SIGNAL(changed()), SLOT(matrixChanged()));
    this->mSetupImage->connect(this->mPreset, SIGNAL(changed()), SLOT(matrixChanged()));
    this->mSetupFont->connect(this->mPreset, SIGNAL(changed()), SLOT(matrixChanged()));
    this->mSetupTemplates->connect(this->mPreset, SIGNAL(changed()), SLOT(matrixChanged()));
    this->connect(this->mPreset, SIGNAL(changed()), SLOT(presetChanged()));

    this->fillPresetsList();

    int presetIndex = this->ui->comboBoxPresets->findText(selectedPreset);
    if (presetIndex >= 0)
        this->ui->comboBoxPresets->setCurrentIndex(presetIndex);

    this->mPresetChanged = false;

    this->ui->tabWidgetSetupParts->addTab(this->mSetupPrepare, this->mSetupPrepare->windowTitle());
    this->ui->tabWidgetSetupParts->addTab(this->mSetupMatrix, this->mSetupMatrix->windowTitle());
    this->ui->tabWidgetSetupParts->addTab(this->mSetupReordering, this->mSetupReordering->windowTitle());
    this->ui->tabWidgetSetupParts->addTab(this->mSetupImage, this->mSetupImage->windowTitle());
    this->ui->tabWidgetSetupParts->addTab(this->mSetupFont, this->mSetupFont->windowTitle());
    this->ui->tabWidgetSetupParts->addTab(this->mSetupTemplates, this->mSetupTemplates->windowTitle());
}
//-----------------------------------------------------------------------------
DialogOptions::~DialogOptions()
{
    if (this->mPreview != NULL)
        delete this->mPreview;

    delete this->mSetupPrepare;
    delete this->mSetupMatrix;
    delete this->mSetupReordering;
    delete this->mSetupFont;
    delete this->mSetupImage;
    delete this->mSetupTemplates;
    delete ui;
    delete this->mPreset;
}
//-----------------------------------------------------------------------------
void DialogOptions::fillPresetsList()
{
    QString current = this->ui->comboBoxPresets->currentText();

    this->ui->comboBoxPresets->clear();

    QStringList names = Preset::presetsList();

    this->ui->comboBoxPresets->addItems(names);

    if (names.contains(current))
    {
        this->ui->comboBoxPresets->setCurrentIndex(names.indexOf(current));
    }
}
//-----------------------------------------------------------------------------
void DialogOptions::presetLoad(const QString &name)
{
    if (this->mPreset->load(name))
    {
        // update gui
    }
}
//-----------------------------------------------------------------------------
void DialogOptions::presetSaveAs(const QString &name)
{
    this->mPreset->save(name);
    this->fillPresetsList();
}
//-----------------------------------------------------------------------------
void DialogOptions::presetRemove(const QString &name)
{
    Preset::remove(name);

    this->fillPresetsList();
}
//-----------------------------------------------------------------------------
void DialogOptions::createPresetsDefault()
{
    Preset matrix(this);

    matrix.initMono(MonochromeTypeDiffuseDither);
    matrix.save(tr("Monochrome"));

    matrix.initGrayscale(4);
    matrix.save(tr("Grayscale 4"));

    matrix.initGrayscale(8);
    matrix.save(tr("Grayscale 8"));

    matrix.initColor(4, 5, 4);
    matrix.save(tr("Color R4G5B4"));

    matrix.initColor(5, 6, 5);
    matrix.save(tr("Color R5G6B5"));

    matrix.initColor(8, 8, 8);
    matrix.save(tr("Color R8G8B8"));
}
//-----------------------------------------------------------------------------
bool DialogOptions::checkOverwrite(const QString &originalName, QString *resultName) const
{
    QStringList existingNames = Preset::presetsList();

    if (!existingNames.contains(originalName)) {
        *resultName = originalName;
        return true;
    }

    QInputDialog dialog(this->parentWidget());
    QObject::connect(&dialog, SIGNAL(textValueChanged(QString)), this, SLOT(presetOverwiteNameChanged(QString)));
    dialog.setWindowTitle(tr("Import - Attention"));
    dialog.setTextValue(originalName);

    if (dialog.exec() == QDialog::Accepted) {
        *resultName = dialog.textValue();
        return true;
    }

    return false;
}
//-----------------------------------------------------------------------------
void DialogOptions::presetChanged()
{
    if (this->mData != NULL)
    {
        if (this->mPreview != NULL)
            this->mPreview->updatePreview();
    }
    this->mPresetChanged = true;
}
//-----------------------------------------------------------------------------
void DialogOptions::on_pushButtonPreview_clicked()
{
    if (this->mPreview == NULL)
    {
        this->mPreview = new DialogPreview(this->mData, this->mPreset, this);
        QObject::connect(this->mPreview, SIGNAL(accepted()), this, SLOT(previewClosed()));
        QObject::connect(this->mPreview, SIGNAL(rejected()), this, SLOT(previewClosed()));
    }

    this->mPreview->show();
}
//-----------------------------------------------------------------------------
void DialogOptions::on_pushButtonPresetSaveAs_clicked()
{
    QStringList names = Preset::presetsList();

    QInputDialog dialog(this);
    dialog.setComboBoxItems(names);
    dialog.setComboBoxEditable(true);

    QString current = this->ui->comboBoxPresets->currentText();
    bool ok;

    QString result = dialog.getItem(this, tr("Enter preset name"), tr("Preset name:"), names, names.indexOf(current), true, &ok);
    if (ok && !result.isEmpty())
    {
        this->presetSaveAs(result);
    }

    this->fillPresetsList();
}
//-----------------------------------------------------------------------------
void DialogOptions::on_pushButtonPresetRemove_clicked()
{
    QString name = this->ui->comboBoxPresets->currentText();
    this->presetRemove(name);

    this->fillPresetsList();
}
//-----------------------------------------------------------------------------
void DialogOptions::on_pushButtonPresetImport_clicked()
{
    QFileDialog dialog(this->parentWidget());
    dialog.setAcceptMode(QFileDialog::AcceptOpen);
    dialog.setFileMode(QFileDialog::ExistingFiles);
    dialog.setNameFilter(tr("XML Files (*.xml)"));
    dialog.setWindowTitle(tr("Open xml preset file"));

    if (dialog.exec() == QDialog::Accepted)
    {
        QString filename = dialog.selectedFiles().at(0);

        Preset *importedPreset = new Preset(this);
        importedPreset->loadXML(filename);
        QString resultPresetName;

        if (this->checkOverwrite(importedPreset->name(), &resultPresetName)) {
            importedPreset->save(resultPresetName);
        }

        delete importedPreset;

        this->fillPresetsList();
    }
}
//-----------------------------------------------------------------------------
void DialogOptions::on_pushButtonPresetExport_clicked()
{
    QFileDialog dialog(this->parentWidget());
    dialog.setAcceptMode(QFileDialog::AcceptSave);
    dialog.setFileMode(QFileDialog::AnyFile);
    dialog.setNameFilter(tr("XML Files (*.xml)"));
    dialog.setDefaultSuffix(QString("xml"));
    dialog.setWindowTitle(tr("Save file as"));
    dialog.selectFile(this->mPreset->name());

    if (dialog.exec() == QDialog::Accepted)
    {
        QString filename = dialog.selectedFiles().at(0);
        this->mPreset->saveXML(filename);
    }
}
//-----------------------------------------------------------------------------
void DialogOptions::on_comboBoxPresets_currentIndexChanged(int index)
{
    QString name = this->ui->comboBoxPresets->itemText(index);
    this->presetLoad(name);
}
//-----------------------------------------------------------------------------
void DialogOptions::previewClosed()
{
    if (this->mPreview != NULL)
    {
        delete this->mPreview;
        this->mPreview = NULL;
    }
}
//-----------------------------------------------------------------------------
void DialogOptions::presetOverwiteNameChanged(const QString &value)
{
    QInputDialog *dialog = qobject_cast<QInputDialog *>(sender());
    QStringList existingNames = Preset::presetsList();

    if (existingNames.contains(value)) {
        QString message = tr("Preset with name \"%1\" already exists. Continue with overwrite?", "Warning about preset overwrite").arg(value);
        dialog->setLabelText(message);
    } else {
        QString message = tr("Preset with name \"%1\" doesn't exists. All OK.", "Warning about preset overwrite").arg(value);
        dialog->setLabelText(message);
    }
}
//-----------------------------------------------------------------------------
void DialogOptions::done(int result)
{
    if (result == QDialog::Accepted)
    {
        if (this->mPresetChanged)
        {
            QMessageBox msgBox;
            msgBox.setText(tr("Save changes?"));
            msgBox.setStandardButtons(QMessageBox::Yes| QMessageBox::No | QMessageBox::Cancel);
            msgBox.setDefaultButton(QMessageBox::Cancel);
            int result = msgBox.exec();

            switch (result)
            {
            case QMessageBox::Yes:
            {
                QString name = this->ui->comboBoxPresets->currentText();

                if (name.isEmpty())
                {
                    name = QString("default");
                }

                this->mPreset->save(name);
                Preset::setSelectedName(name);

                QDialog::done(result);
                break;
            }
            case QMessageBox::No:
            {
                QDialog::done(result);
                break;
            }
            case QMessageBox::Cancel:
            {
                break;
            }
            default:
            {
                QDialog::done(result);
                break;
            }
            }
        }
        else
        {
            QDialog::done(result);
        }
    }
    else
    {
        QDialog::done(result);
        return;
    }
}
//-----------------------------------------------------------------------------