/**
 * \file QBibtexDialog.C
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author John Levon
 *
 * Full author contact details are available in file CREDITS.
 */

#include <config.h>

#include "QBibtexDialog.h"
#include "QBibtex.h"

#include <QCloseEvent>

#include "checkedwidgets.h"
#include "Qt2BC.h"
#include "qt_helpers.h"
#include "validators.h"

#include "controllers/ControlBibtex.h"
#include "controllers/ButtonPolicies.h"

#include "debug.h"
#include "support/filetools.h"
#include "support/lstrings.h"

#include <QPushButton>
#include <QListWidget>
#include <QLineEdit>

using lyx::support::changeExtension;
using lyx::support::trim;

using std::string;

namespace lyx {
namespace frontend {


QBibtexDialog::QBibtexDialog(QBibtex * form)
	: form_(form)
{
	setupUi(this);
	QDialog::setModal(true);

	connect(okPB, SIGNAL(clicked()),
		form, SLOT(slotOK()));
	connect(closePB, SIGNAL(clicked()),
		form, SLOT(slotClose()));
	connect(stylePB, SIGNAL( clicked() ),
		this, SLOT( browsePressed() ) );
	connect(deletePB, SIGNAL( clicked() ),
		this, SLOT( deletePressed() ) );
	connect(styleCB, SIGNAL( editTextChanged (const QString&) ),
		this, SLOT( change_adaptor() ) );
	connect(databaseLW, SIGNAL( itemSelectionChanged() ),
		this, SLOT( databaseChanged() ) );
	connect(bibtocCB, SIGNAL( toggled(bool) ),
		this, SLOT( change_adaptor() ) );
	connect(btPrintCO, SIGNAL( activated(int) ),
		this, SLOT( change_adaptor() ) );
	connect(addBibPB, SIGNAL( clicked() ),
		this, SLOT( addPressed() ) );

	add_ = new UiDialog<Ui::QBibtexAddUi>(this, true);

	Qt2BC * bcview = new Qt2BC(add_bc_);
	add_bc_.view(bcview);
	add_bc_.bp(new OkCancelPolicy);

	bcview->setOK(add_->addPB);
	bcview->setCancel(add_->closePB);

	add_->bibED->setValidator(new PathValidator(false, add_->bibED));
	addCheckedLineEdit(add_bc_.view(), add_->bibED, 0);

	connect(add_->bibED, SIGNAL(textChanged(const QString&)),
		this, SLOT(bibEDChanged()));
	connect(add_->addPB, SIGNAL(clicked()),
		this, SLOT(addDatabase()));
	connect(add_->addPB, SIGNAL(clicked()),
		add_, SLOT(accept()) );
	connect(add_->bibLW, SIGNAL(itemActivated(QListWidgetItem *)),
		this, SLOT(addDatabase()));
	connect(add_->bibLW, SIGNAL(itemActivated(QListWidgetItem *)),
		add_, SLOT(accept()));
	connect(add_->bibLW, SIGNAL(itemChanged(QListWidgetItem *)),
		this, SLOT(availableChanged()));
	connect(add_->browsePB, SIGNAL(clicked()),
		this, SLOT(browseBibPressed()));
	connect(add_->closePB, SIGNAL( clicked() ),
		add_, SLOT( reject() ) );

}


QBibtexDialog::~QBibtexDialog()
{}


void QBibtexDialog::bibEDChanged()
{
	// Indicate to the button controller that the contents have
	// changed. The actual test of validity is carried out by
	// the checkedLineEdit.
	add_bc_.valid(true);
}


void QBibtexDialog::change_adaptor()
{
	form_->changed();
}


void QBibtexDialog::browsePressed()
{
	docstring const file = form_->controller().browseBst(docstring());

	if (!file.empty()) {
		// FIXME UNICODE
		docstring const filen = from_utf8(changeExtension(to_utf8(file), ""));
		bool present = false;
		unsigned int pres = 0;

		for (int i = 0; i != styleCB->count(); ++i) {
			if (qstring_to_ucs4(styleCB->itemText(i)) == filen) {
				present = true;
				pres = i;
			}
		}

		if (!present)
			styleCB->insertItem(0, toqstr(filen));

		styleCB->setCurrentIndex(pres);
		form_->changed();
	}
}


void QBibtexDialog::browseBibPressed()
{
	docstring const file = trim(form_->controller().browseBib(docstring()));

	if (!file.empty()) {
		// FIXME UNICODE
		QString const f = toqstr(changeExtension(to_utf8(file), ""));
		bool present = false;

		for (int i = 0; i < add_->bibLW->count(); ++i) {
			if (add_->bibLW->item(i)->text() == f)
				present = true;
		}

		if (!present) {
			add_->bibLW->addItem(f);
			form_->changed();
		}

		add_->bibED->setText(f);
	}
}


void QBibtexDialog::addPressed()
{
	add_->exec();
	add_bc_.valid(false);
}


void QBibtexDialog::addDatabase()
{
	int const sel = add_->bibLW->currentRow();
	docstring const file = trim(qstring_to_ucs4(add_->bibED->text()));

	if (sel < 0 && file.empty())
		return;

	// Add the selected browser_bib keys to browser_database
	// multiple selections are possible
	for (int i = 0; i != add_->bibLW->count(); ++i) {
		QListWidgetItem * const item = add_->bibLW->item(i);
		if (add_->bibLW->isItemSelected(item)) {
			add_->bibLW->setItemSelected(item, false);
			QList<QListWidgetItem *> matches =
				databaseLW->findItems(item->text(), Qt::MatchExactly);
			if (matches.empty())
				databaseLW->addItem(item->text());
		}
	}

	if (!file.empty()) {
		add_->bibED->clear();
		QString const f = toqstr(from_utf8(changeExtension(to_utf8(file), "")));
		QList<QListWidgetItem *> matches =
			databaseLW->findItems(f, Qt::MatchExactly);
		if (matches.empty())
			databaseLW->addItem(f);
	}

	form_->changed();
}


void QBibtexDialog::deletePressed()
{
	databaseLW->takeItem(databaseLW->currentRow());
}



void QBibtexDialog::databaseChanged()
{
	deletePB->setEnabled(!form_->readOnly() && databaseLW->currentRow() != -1);
}


void QBibtexDialog::availableChanged()
{
	form_->changed();
}


void QBibtexDialog::closeEvent(QCloseEvent *e)
{
	form_->slotWMHide();
	e->accept();
}


} // namespace frontend
} // namespace lyx

#include "QBibtexDialog_moc.cpp"