/*
  Copyright 2010-2013 Grégory Soutadé

  This file is part of KissCount.

  KissCount 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.

  KissCount 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 KissCount.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <QtCharts/QChartView>
#include <QtCharts/QPieSeries>
#include <QtCharts/QPieSlice>

#include <QHeaderView>
#include "CostRepartitionBanner.hpp"

using namespace QtCharts;

CostRepartitionBanner::CostRepartitionBanner(KissCount* kiss, QFrame* parent, QString* categories) : QFrame(parent), _kiss(kiss), _categories(categories)
{
    User* user = _kiss->GetUser();
    int nbCategories, i;
    QVBoxLayout *vbox = new QVBoxLayout;

    setLayout(vbox);

    nbCategories = user->GetCategoriesNumber();

    QPieSeries *series = new QPieSeries();
    QPieSlice* slice;

    _pie = new QChart();

    QPen pen;
    pen.setWidth(2);
    pen.setColor(Qt::black);

    QLegend* legend = _pie->legend();
    legend->detachFromChart();
    legend->setAlignment(Qt::AlignTop);
    legend->setVisible(false);
    legend->setShowToolTips(true);

    _pie->setMargins(QMargins(5, 5, 5, 5));

    /* Ignore fix category */
    for(i=1; i<nbCategories; i++)
    {
	slice = series->append(_categories[i], 0);
	if (i < wxUI::MAX_CATEGORY)
	    slice->setBrush(QBrush(wxUI::categoryColors[i]));
	slice->setLabelVisible(false);
    }

    _pie->addSeries(series);

    _statsGrid = new QTableWidget(this);
    _statsGrid->verticalHeader()->setHidden(true);
    _statsGrid->horizontalHeader()->setHidden(true);
    _statsGrid->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::MinimumExpanding);
    _statsGrid->setSizeAdjustPolicy(QAbstractScrollArea::AdjustToContents);
    _statsGrid->setMaximumHeight( 300 );

    setSizePolicy(QSizePolicy::Minimum, QSizePolicy::MinimumExpanding);

    QChartView *chartView = new QChartView(_pie);
    chartView->setRenderHint(QPainter::Antialiasing);

    QHBoxLayout *hbox = new QHBoxLayout;

    hbox->addStretch();
    hbox->addWidget(_statsGrid);
    hbox->addStretch();

    vbox->addLayout(hbox);

    vbox->addWidget(chartView);

    setMaximumWidth(450);
}

void CostRepartitionBanner::Reset()
{
    int i;
    User* user = _kiss->GetUser();
    int nb_categories = user->GetCategoriesNumber();
    
    if (!_statsGrid->rowCount())
    {
	_statsGrid->setColumnCount(2);
        //_statsGrid->EnableEditing(false);
    }
    else
    {
        _statsGrid->clear();
    }
    _statsGrid->setRowCount(nb_categories+1); // categories + non fix

    _statsGrid->setItem(1, 0, new QTableWidgetItem(_("Non fix")));
    _statsGrid->setItem(1, 1, new QTableWidgetItem(""));
    _statsGrid->item(1, 1)->setTextAlignment(Qt::AlignRight|Qt::AlignVCenter);

    for(i=0; i<nb_categories; i++)
    {
	if (!i)
	{
	    _statsGrid->setItem(i, 0, new QTableWidgetItem(_categories[i]));
	    _statsGrid->setItem(i, 1, new QTableWidgetItem(""));
	    _statsGrid->item(i, 1)->setTextAlignment(Qt::AlignRight|Qt::AlignVCenter);
	}
	else
	{
	    _statsGrid->setItem(i+1, 0, new QTableWidgetItem(_categories[i]));
	    _statsGrid->setItem(i+1, 1, new QTableWidgetItem(""));
	    _statsGrid->item(i+1, 1)->setTextAlignment(Qt::AlignRight|Qt::AlignVCenter);
	}
    }

    _statsGrid->resizeColumnToContents(0);
}

void CostRepartitionBanner::UpdateCosts(int *categoriesValues, int totalDebit)
{
    int i;
    User* user = _kiss->GetUser();
    unsigned long value, percents, utotalDebit = totalDebit;
    QString v;
    QPieSeries* series = (QPieSeries*) (_pie->series()[0]);
    QList<QtCharts::QPieSlice*> slices = series->slices();
    
    for(i=0; i<user->GetCategoriesNumber(); i++)
    {
        if (totalDebit != 0)
	{
            percents = ((categoriesValues[i]*(unsigned long)100))/utotalDebit;
	}
        else
            percents = 0.0;

	if (!i)
	    _statsGrid->item(i, 1)->setText(v.sprintf("%.2lf (%02d %%)", (double)categoriesValues[i]/100, (int)percents));
	else
	{
	    _statsGrid->item(i+1, 1)->setText(v.sprintf("%.2lf (%02d %%)", (double)categoriesValues[i]/100, (int)percents));

	    slices[i-1]->setValue(categoriesValues[i] / 100);
	    slices[i-1]->setLabelVisible(categoriesValues[i] != 0.0);
	}
    }

    value = totalDebit - categoriesValues[0];
    if (totalDebit != 0)
    	percents = (value*100)/totalDebit;
    else
    	percents = 0.0;
    _statsGrid->item(1, 1)->setText(v.sprintf("%.2lf (%02d %%)", (double)value/100, (int)percents));

    _statsGrid->resizeColumnsToContents();
}