/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#include "gui/shaderbrowser-dialog.h"

#include "common/system.h"
#include "common/algorithm.h"
#include "common/str-array.h"
#include "common/zip-set.h"

#include "common/translation.h"

#include "gui/widgets/list.h"
#include "gui/browser.h"
#include "gui/gui-manager.h"
#include "gui/message.h"

namespace GUI {

enum {
	kChooseCmd = 'Chos',
	kChooseFileCmd = 'File',
};

const char *kFileMask = "*.glslp";
const char *kFileExt  = "glslp";

ShaderBrowserDialog::ShaderBrowserDialog() : Dialog("ShaderBrowser") {

	new StaticTextWidget(this, "ShaderBrowser.Headline", _("Choose shader for loading"));

	_fileName = new EditTextWidget(this, "ShaderBrowser.Filename", Common::U32String());

	// Add file list
	_fileList = new ListWidget(this, "ShaderBrowser.List");
	_fileList->setNumberingMode(kListNumberingOff);
	_fileList->setEditable(false);

	_backgroundType = GUI::ThemeEngine::kDialogBackgroundPlain;

	// Buttons
	new ButtonWidget(this, "ShaderBrowser.Cancel", _("Cancel"), Common::U32String(), kCloseCmd);
	new ButtonWidget(this, "ShaderBrowser.Choose", _("Choose"), Common::U32String(), kChooseCmd);
}

void ShaderBrowserDialog::open() {
	// Call super implementation
	Dialog::open();

	Common::generateZipSet(_shaderSet, "shaders.dat", "shaders*.dat");

	updateListing();
}

void ShaderBrowserDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
	switch (cmd) {
	case kChooseCmd:
		if (_fileName->getEditString().empty())
			break;

		normalieFileName();

		setResult(1);
		close();
		break;
	case kChooseFileCmd: {
		BrowserDialog browser(_("Select shader"), false);
		if (browser.runModal() > 0) {
			// User made his choice...
			Common::FSNode file(browser.getResult());
			_fileName->setEditString(file.getPath());

			g_gui.scheduleTopDialogRedraw();
		}
		break;
	}
	case kListSelectionChangedCmd:
		_fileName->setEditString(_fileList->getList().operator[](_fileList->getSelected()));
		_fileName->markAsDirty();
		break;
	case kListItemActivatedCmd:
	case kListItemDoubleClickedCmd:
		normalieFileName();
		setResult(1);
		close();
		break;
	default:
		Dialog::handleCommand(sender, cmd, data);
	}
}

void ShaderBrowserDialog::normalieFileName() {
	Common::String filename = Common::convertFromU32String(_fileName->getEditString());

	if (filename.matchString(kFileMask, true))
		return;

	_fileName->setEditString(filename + "." + kFileExt);
}


void ShaderBrowserDialog::updateListing() {
	Common::U32StringArray list;
	Common::ArchiveMemberList files;

	_shaderSet.listMatchingMembers(files, kFileMask, true);

	Common::sort(files.begin(), files.end(), Common::ArchiveMemberListComparator());

	for (auto &file : files) {
		list.push_back(Common::U32String(file->getName()));
	}

	_fileList->setList(list);
	_fileList->scrollTo(0);

	// Finally, redraw
	g_gui.scheduleTopDialogRedraw();
}

} // End of namespace GUI