#include "historywindow.h"

#include "mainwindow.h"

extern QString iconPath;

extern Settings settings;

extern Main *mainWindow;

HistoryWindow::HistoryWindow (QWidget *parent):QDialog (parent)

{

	ui.setupUi (this);

	ui.historyTable->setRowCount (20);

	ui.historyTable->setColumnCount (3);

	QTableWidgetItem *item;

	item= new QTableWidgetItem(tr("Action","Table with actions"));

	ui.historyTable->setHorizontalHeaderItem(0, item);

	item= new QTableWidgetItem(tr("Comment","Table with actions"));

	ui.historyTable->setHorizontalHeaderItem(1, item);

	item= new QTableWidgetItem(tr("Undo action","Table with actions"));

	ui.historyTable->setHorizontalHeaderItem(2, item);

	ui.historyTable->setSelectionBehavior (QAbstractItemView::SelectRows);

	ui.undoButton->setIcon (QIcon(iconPath+"/undo.png"));

	ui.redoButton->setIcon (QIcon(iconPath+"/redo.png"));

	connect ( ui.undoButton, SIGNAL (clicked()), this, SLOT (undo()));

	connect ( ui.redoButton, SIGNAL (clicked()), this, SLOT (redo()));

	connect ( ui.historyTable, SIGNAL (itemSelectionChanged()), this, SLOT (select()));

	// Load Settings

	for (int i=0; i<3; ++i)

		ui.historyTable->setColumnWidth (i,settings.value( QString("/historywindow/geometry/columnWidth/%1").arg(i),150).toInt());

}

HistoryWindow::~HistoryWindow()

{

	for (int i=0; i<3; ++i)

		settings.setValue( QString("/historywindow/geometry/columnWidth/%1").arg(i), ui.historyTable->columnWidth (i) );

}

void HistoryWindow::clearRow(int row)

{

	QTableWidgetItem *it;

	it=ui.historyTable->item (row,0);

	if (it) it->setText ("");

	it=ui.historyTable->item (row,1);

	if (it) it->setText ("");

	it=ui.historyTable->item (row,2);

	if (it) it->setText ("");

}

void HistoryWindow::updateRow(int row, int step, SimpleSettings &set)

{

	QTableWidgetItem *item;

	item= new QTableWidgetItem(set.readEntry(QString("/history/step-%1/redoCommand").arg(step)));

	ui.historyTable->setItem(row, 0, item);

	item= new QTableWidgetItem(set.readEntry(QString("/history/step-%1/comment").arg(step)));

	ui.historyTable->setItem(row, 1, item);

	item=new QTableWidgetItem(set.readEntry(QString("/history/step-%1/undoCommand").arg(step)));

	ui.historyTable->setItem(row, 2, item);

}

void HistoryWindow::update(SimpleSettings &set)

{

	int undosAvail=set.readNumEntry("/history/undosAvail",0);

	int redosAvail=set.readNumEntry("/history/redosAvail",0);

	int stepsTotal=set.readNumEntry("/history/stepsTotal",0);

	int curStep=set.readNumEntry ("/history/curStep");

	int i;

	int s=curStep;

	int r=undosAvail-1;

	QTableWidgetItem *item;

	// Update buttons

	if (undosAvail<1)

		ui.undoButton->setEnabled (false);

	else	

		ui.undoButton->setEnabled (true);

	if (redosAvail<1)

		ui.redoButton->setEnabled (false);

	else	

		ui.redoButton->setEnabled (true);

	// Update undos in table

	for (i=undosAvail; i>0; i--)

	{

		updateRow (r,s,set);

		r--;

		s--;

		if (s<1) s=stepsTotal;

	}

	// Generated the "now" row

	QColor c(255,200,120);

	for (i=0;i<=2;i++)

	{

		if (i!=1)

		{

			item=new QTableWidgetItem("");

			item->setBackgroundColor (c);

			ui.historyTable->setItem(undosAvail, i, item);

		}

	}

	item=new QTableWidgetItem(" - " +tr("Current state","Current bar in history hwindow")+ " - ");

	item->setBackgroundColor (c);

	ui.historyTable->setItem(undosAvail, 1, item);

	// Show "now" row

	ui.historyTable->scrollToItem (item);

	// Update Redos in table

	s=curStep;

	s++; if (s>stepsTotal) s=1;

	for (i=1;i<= redosAvail; i++)

	{

		updateRow (undosAvail+i,s,set);

		s++; if (s>stepsTotal) s=1;

	}

	// Delete the rest

	for (i=undosAvail+redosAvail+1;i<= stepsTotal; i++)

		clearRow (i);

	ui.historyTable->resizeColumnsToContents();

}

void HistoryWindow::setStepsTotal (int st)

{

	// Number of steps + "current" bar

	ui.historyTable->setRowCount (st+1);

}

void HistoryWindow::closeEvent (QCloseEvent *ce)

{

	emit (windowClosed() );

}

void HistoryWindow::undo()

{

	mainWindow->editUndo();

}

void HistoryWindow::redo()

{

	mainWindow->editRedo();

}

void HistoryWindow::select()

{

	mainWindow->gotoHistoryStep (ui.historyTable->row (ui.historyTable->selectedItems().first()));

}