#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 (settings.value( "/mapeditor/stepsTotal",75).toInt());
	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

	resize (settings.value ( "/satellite/historywindow/geometry/size", QSize(1000,400)).toSize());
	move   (settings.value ( "/satellite/historywindow/geometry/pos", QPoint (0,450)).toPoint());

	ui.historyTable->setColumnWidth (0,settings.value("/satellite/historywindow/geometry/columnWidth/0",250).toInt());
	ui.historyTable->setColumnWidth (1,settings.value("/satellite/historywindow/geometry/columnWidth/1",350).toInt());
	ui.historyTable->setColumnWidth (2,settings.value("/satellite/historywindow/geometry/columnWidth/2",250).toInt());
}

HistoryWindow::~HistoryWindow()
{
	// Save settings
	settings.setValue( "/satellite/historywindow/geometry/size", size() );
	settings.setValue( "/satellite/historywindow/geometry/pos", pos() );

	for (int i=0; i<3; ++i)
		settings.setValue( QString("/satellite/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 number of rows
	ui.historyTable->setRowCount (undosAvail + redosAvail +1);

	// 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 *)
{
	emit (windowClosed() );
}

void HistoryWindow::undo()
{
	mainWindow->editUndo();
}

void HistoryWindow::redo()
{
	mainWindow->editRedo();
}

void HistoryWindow::select()
{
	mainWindow->gotoHistoryStep (ui.historyTable->row (ui.historyTable->selectedItems().first()));
}
