/* 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 "ultima/nuvie/core/nuvie_defs.h"
#include "ultima/nuvie/gui/gui_drag_area.h"
#include "ultima/nuvie/gui/gui_drag_manager.h"
#include "ultima/nuvie/core/game.h"  // -+- Included so we can set WAIT_MODE while dragging.
#include "ultima/nuvie/core/events.h" // /
#include "ultima/nuvie/gui/widgets/msg_scroll.h"

namespace Ultima {
namespace Nuvie {

GUI_DragManager::GUI_DragManager(Screen *s): screen(s), message(0),
		data(nullptr), drag_source(nullptr), is_out_of_range(false) {
}

GUI_status GUI_DragManager::start_drag(GUI_DragArea *src, int msg, void *d, unsigned char *icon_buf, uint16 w, uint16 h, uint8 bpp, bool out_of_range) {
	DEBUG(false, LEVEL_DEBUGGING, "Start Drag\n");

	drag_source = src;
	message = msg;
	data = d;
	is_out_of_range = out_of_range;
//Game::get_game()->get_event()->set_mode(WAIT_MODE);
	Game::get_game()->pause_user();
	return GUI_DRAG_AND_DROP;
}

void GUI_DragManager::drop(GUI_DragArea *drag_target, int x, int y) {
	DEBUG(0, LEVEL_DEBUGGING, "Drop\n");

//Game::get_game()->get_event()->endAction(); // WAIT_MODE
	Game::get_game()->unpause_user();
	if (is_out_of_range) {
		MsgScroll *scroll = Game::get_game()->get_scroll();
		scroll->display_string("Move-");
		scroll->display_string(Game::get_game()->get_obj_manager()->look_obj((Obj *)data)); // getting obj name
		scroll->message(".\n\nOut of range!\n\n");
		drag_source->drag_drop_failed(x, y, message, data);
	} else if (drag_target->drag_accept_drop(x, y, message, data)) {
		//inform the source of the success so it can perform operations before the drop takes place.
		drag_source->drag_drop_success(x, y, message, data);
		drag_target->drag_perform_drop(x, y, message, data);
	} else
		drag_source->drag_drop_failed(x, y, message, data);


	drag_source = nullptr;

	return;
}

void GUI_DragManager::draw(int x, int y) {
	if (!drag_source)
		return;

	drag_source->drag_draw(x, y, message, data);
}

GUI_DragArea *GUI_DragManager::get_source() {
	return drag_source;
}

} // End of namespace Nuvie
} // End of namespace Ultima