/*
 * Copyright (c) 2009 Ned Harding (ned@hardinggroup.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 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, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "SplitRideDialog.h"
#include "MainWindow.h"
#include "RideFile.h"
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <QtGui>
#include <boost/scoped_ptr.hpp>

namespace
{
    QString MakeTimeString(double secs)
    {
        QString strTime;
        double mins = ((int) secs) / 60;
        secs = secs - mins * 60.0;
        double hrs = ((int) mins) / 60;
        mins = mins - hrs * 60.0;
        strTime.sprintf("%02.0f:%02.0f:%02.0f", hrs, mins, secs);
        return strTime;
    }

    class ListItem_Split : public QListWidgetItem
    {
        public:
        int m_nRecNum;
        explicit ListItem_Split(int nRecNum, const QString &text, QListWidget *view)
                : QListWidgetItem(text, view)
                , m_nRecNum(nRecNum)
        {
        }
    };
}

SplitRideDialog::SplitRideDialog(MainWindow *mainWindow)
    : mainWindow(mainWindow)
{
    setAttribute(Qt::WA_DeleteOnClose);
    setWindowTitle("Split Ride");

    listWidget = new QListWidget(this);
    listWidget->setSelectionMode(QAbstractItemView::SingleSelection);

    QLabel *splitLabel = new QLabel(tr("Split at the following positions:"), this);
    QLabel *labelSpacer = new QLabel(this);
    labelSpacer->setIndent(10);

    okButton = new QPushButton(tr("&OK"), this);
    cancelButton = new QPushButton(tr("&Cancel"), this);

    connect(okButton, SIGNAL(clicked()), this, SLOT(okClicked()));
    connect(cancelButton, SIGNAL(clicked()), this, SLOT(cancelClicked()));
    connect(listWidget,
            SIGNAL(itemSelectionChanged()), this, SLOT(selectionChanged()));

    QHBoxLayout *buttonLayout = new QHBoxLayout;
    buttonLayout->addWidget(okButton);
    buttonLayout->addWidget(cancelButton);

    QVBoxLayout *mainLayout = new QVBoxLayout(this);
    mainLayout->addWidget(splitLabel);
    mainLayout->addWidget(listWidget);
    mainLayout->addWidget(labelSpacer);
    mainLayout->addLayout(buttonLayout);

    double dLastSeconds = -1.0;
    int nLastInterval = 0;
    int nDataPoint = 0;
    const RideFile *ride = mainWindow->currentRide();

    foreach (const RideFilePoint *point, ride->dataPoints())
    {
        if (dLastSeconds>=0 &&
            ((point->secs-dLastSeconds)>=30 || nLastInterval!=point->interval))
        {

            QString strDesc;
            if (nLastInterval!=point->interval)
                strDesc.sprintf("Interval #%d", point->interval);
            else
                strDesc = "Time Gap: " +  MakeTimeString(point->secs-dLastSeconds);

            strDesc = MakeTimeString(point->secs) + " - " + strDesc;
            ListItem_Split *pItem = new ListItem_Split(nDataPoint, strDesc, listWidget);

            if ((point->secs-dLastSeconds)>20*60)
                pItem->setCheckState(Qt::Checked);
            else
                pItem->setCheckState(Qt::Unchecked);
        }

        dLastSeconds = point->secs;
        nLastInterval = point->interval;
        ++nDataPoint;
    }
}


void
SplitRideDialog::cancelClicked()
{
    reject();
}

void
SplitRideDialog::CreateNewRideFile(const RideFile *ride, int nRecStart, int nRecEnd)
{
    QDateTime newStart =  ride->startTime();
    RideFilePoint *pointStart = ride->dataPoints().at(nRecStart);
    newStart = newStart.addMSecs(static_cast<qint64>(pointStart->secs*1000 + 0.5));
    boost::scoped_ptr<RideFile> newRideFile(new RideFile(newStart, ride->recIntSecs()));
    for (int nItem = nRecStart; nItem<nRecEnd; ++nItem)
    {
        RideFilePoint *pPoint = ride->dataPoints().at(nItem);
        newRideFile->appendPoint(pPoint->secs-pointStart->secs, pPoint->cad, pPoint->hr, pPoint->km - pointStart->km,
                 pPoint->kph, pPoint->nm, pPoint->watts, pPoint->alt, pPoint->interval-pointStart->interval);
    }

    QString fileName;
    fileName.sprintf("%04d_%02d_%02d_%02d_%02d_%02d.csv",
                            newStart.date().year(), newStart.date().month(),
                            newStart.date().day(), newStart.time().hour(), newStart.time().minute(),
                            newStart.time().second());
    QString filePath = mainWindow->home.absolutePath() + "/" + fileName;

    QFile file(filePath);
    if (file.exists())
    {
        QMessageBox::critical(this, tr("Split Ride"), tr("The file %1 already exists and will not be overwritten").arg(filePath));
        return;
    }
    if (!file.open(QFile::WriteOnly | QFile::Truncate))
        QMessageBox::critical(this, tr("Split Ride"), tr("The file %1 can't be opened for writing").arg(filePath));

    newRideFile->writeAsCsv(file, true);

    mainWindow->addRide(fileName, false);
}
void
SplitRideDialog::okClicked()
{
    const RideFile *ride = mainWindow->currentRide();

    int nStartPoint = 0;
    for (int nRow=0; nRow<listWidget->count(); ++nRow)
    {
        const ListItem_Split *pItem = static_cast<const ListItem_Split *>(listWidget->item(nRow));
        if (pItem->checkState()==Qt::Checked)
        {
            CreateNewRideFile(ride, nStartPoint, pItem->m_nRecNum);
            nStartPoint = pItem->m_nRecNum;
        }
    }

    if (nStartPoint!=0)
    {
        CreateNewRideFile(ride, nStartPoint, mainWindow->currentRide()->dataPoints().count());
        mainWindow->removeCurrentRide();
    }

    done(0);
}

void
SplitRideDialog::selectionChanged()
{
}