/* 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#include "gui/remotebrowser.h"
#include "gui/widgets/list.h"

#include "common/config-manager.h"
#include "common/system.h"
#include "common/algorithm.h"

#include "common/translation.h"
#include <backends/networking/curl/request.h>
#include <backends/cloud/storage.h>
#include <backends/cloud/cloudmanager.h>

namespace GUI {

enum {
	kChooseCmd = 'Chos',
	kGoUpCmd = 'GoUp',
	kHiddenCmd = 'Hidd'
};

/* We want to use this as a general directory selector at some point... possible uses
 * - to select the data dir for a game
 * - to select the place where save games are stored
 * - others???
 */

RemoteBrowserDialog::RemoteBrowserDialog(const char *title, bool dirRemoteBrowser)
	: Dialog("Browser"), _navigationLocked(false), _updateList(false) {

	_isDirRemoteBrowser = dirRemoteBrowser;
	_fileList = NULL;
	_currentPath = NULL;

	// Headline - TODO: should be customizable during creation time
	new StaticTextWidget(this, "Browser.Headline", title);

	// Current path - TODO: handle long paths ?
	_currentPath = new StaticTextWidget(this, "Browser.Path", "DUMMY");

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

	_backgroundType = GUI::ThemeEngine::kDialogBackgroundPlain;

	// hide checkbox for the "show hidden files" state.
	//_showHiddenWidget = new CheckboxWidget(this, "Browser.Hidden", _("Show hidden files"), _("Show files marked with the hidden attribute"), kHiddenCmd);

	// Buttons
	if (g_system->getOverlayWidth() > 320)
		new ButtonWidget(this, "Browser.Up", _("Go up"), _("Go to previous directory level"), kGoUpCmd);
	else
		new ButtonWidget(this, "Browser.Up", _c("Go up", "lowres"), _("Go to previous directory level"), kGoUpCmd);
	new ButtonWidget(this, "Browser.Cancel", _("Cancel"), 0, kCloseCmd);
	new ButtonWidget(this, "Browser.Choose", _("Choose"), 0, kChooseCmd);
}

void RemoteBrowserDialog::open() {	
	Dialog::open();
	listDirectory(Cloud::StorageFile());
}

void RemoteBrowserDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
	switch (cmd) {
	case kChooseCmd:
		if (_isDirRemoteBrowser) {
			// If nothing is selected in the list widget, choose the current dir.
			// Else, choose the dir that is selected.
			int selection = _fileList->getSelected();
			if (selection >= 0)
				_choice = _nodeContent[selection];
			else
				_choice = _node;
			setResult(1);
			close();
		} else {
			int selection = _fileList->getSelected();
			if (selection < 0)
				break;
			if (_nodeContent[selection].isDirectory()) {
				_node = _nodeContent[selection];
				updateListing();
			} else {
				_choice = _nodeContent[selection];
				setResult(1);
				close();
			}
		}
		break;
	case kGoUpCmd:
		goUp();
		break;
	case kListItemActivatedCmd:
	case kListItemDoubleClickedCmd:
		if (_nodeContent[data].isDirectory()) {
			_node = _nodeContent[data];
			listDirectory(_node);
		} else if (!_isDirRemoteBrowser) { //TODO: ????
			_choice = _nodeContent[data];
			setResult(1);
			close();
		}
		break;
	case kListSelectionChangedCmd:
		// We do not allow selecting directories in directory
		// RemoteBrowser mode, thus we will invalidate the selection
		// when the user selects an directory over here.
		if (data != (uint32)-1 && _isDirRemoteBrowser && !_nodeContent[data].isDirectory())
			_fileList->setSelected(-1);
		break;
	default:
		Dialog::handleCommand(sender, cmd, data);
	}
}

void RemoteBrowserDialog::handleTickle() {
	if (_updateList) {
		updateListing();
		_updateList = false;
	}

	Dialog::handleTickle();
}

void RemoteBrowserDialog::updateListing() {
	// Update the path display
	Common::String path = _node.path();
	if (path.empty()) path = "/"; //root
	_currentPath->setLabel(path);

	if (!_navigationLocked) {
		// Populate the ListWidget
		ListWidget::StringArray list;
		ListWidget::ColorList colors;
		for (Common::Array<Cloud::StorageFile>::iterator i = _nodeContent.begin(); i != _nodeContent.end(); ++i) {
			if (i->isDirectory()) {
				list.push_back(i->name() + "/");
				colors.push_back(ThemeEngine::kFontColorNormal);
			} else {
				list.push_back(i->name());
				colors.push_back(ThemeEngine::kFontColorAlternate);
			}
		}

		_fileList->setList(list, &colors);
		_fileList->scrollTo(0);
	}

	_fileList->setEnabled(!_navigationLocked);

	// Finally, redraw
	draw();
}

void RemoteBrowserDialog::goUp() {
	Common::String path = _node.path();
	if (path.size() && (path.lastChar() == '/' || path.lastChar() == '\\')) path.deleteLastChar();
	if (path.empty()) {
		draw();
		return;
	}
	for (int i = path.size()-1; i >= 0; --i)
		if (path[i] == '/' || path[i] == '\\') {
			path.erase(i);
			break;
		}
	listDirectory(Cloud::StorageFile(path, 0, 0, true));
}

void RemoteBrowserDialog::listDirectory(Cloud::StorageFile node) {
	if (_navigationLocked) return;
	_navigationLocked = true;

	_workingRequest = CloudMan.listDirectory(
		node.path(),
		new Common::Callback<RemoteBrowserDialog, Cloud::Storage::ListDirectoryResponse>(this, &RemoteBrowserDialog::directoryListedCallback),
		new Common::Callback<RemoteBrowserDialog, Networking::ErrorResponse>(this, &RemoteBrowserDialog::directoryListedErrorCallback),
		false
	);

	_node = node;
	updateListing();
}

void RemoteBrowserDialog::directoryListedCallback(Cloud::Storage::ListDirectoryResponse response) {
	_navigationLocked = false;
	//TODO: list files from response
	_nodeContent = response.value;
	_updateList = true;
}

void RemoteBrowserDialog::directoryListedErrorCallback(Networking::ErrorResponse error) {
	_navigationLocked = false;
	//TODO: show error message
}

} // End of namespace GUI