/* 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 "ags/engine/ac/global_dialog.h"
#include "ags/shared/ac/common.h"
#include "ags/engine/ac/dialog.h"
#include "ags/shared/ac/dialog_topic.h"
#include "ags/shared/ac/game_setup_struct.h"
#include "ags/engine/ac/game_state.h"
#include "ags/engine/debugging/debug_log.h"
#include "ags/engine/debugging/debugger.h"
#include "ags/shared/debugging/out.h"
#include "ags/engine/script/script.h"
#include "ags/globals.h"

namespace AGS3 {

using namespace AGS::Shared;

void RunDialog(int tum) {
	if ((tum < 0) || (tum >= _GP(game).numdialog))
		quit("!RunDialog: invalid topic number specified");

	can_run_delayed_command();

	if (_GP(play).stop_dialog_at_end != DIALOG_NONE) {
		if (_GP(play).stop_dialog_at_end == DIALOG_RUNNING)
			_GP(play).stop_dialog_at_end = DIALOG_NEWTOPIC + tum;
		else
			quitprintf("!RunDialog: two NewRoom/RunDialog/StopDialog requests within dialog; last was called in \"%s\", line %d",
			           _GP(last_in_dialog_request_script_pos).Section.GetCStr(), _GP(last_in_dialog_request_script_pos).Line);
		return;
	}

	get_script_position(_GP(last_in_dialog_request_script_pos));

	if (_G(inside_script))
		_G(curscript)->queue_action(ePSARunDialog, tum, "RunDialog");
	else
		do_conversation(tum);
}


void StopDialog() {
	if (_GP(play).stop_dialog_at_end == DIALOG_NONE) {
		debug_script_warn("StopDialog called, but was not in a dialog");
		debug_script_log("StopDialog called but no dialog");
		return;
	}
	get_script_position(_GP(last_in_dialog_request_script_pos));
	_GP(play).stop_dialog_at_end = DIALOG_STOP;
}

void SetDialogOption(int dlg, int opt, int onoroff, bool dlg_script) {
	if ((dlg < 0) || (dlg >= _GP(game).numdialog))
		quit("!SetDialogOption: Invalid topic number specified");
	if ((opt < 1) || (opt > _G(dialog)[dlg].numoptions)) {
		// Pre-3.1.1 games had "dialog scripts" that were written in different language and
		// parsed differently; its "option-on/off" commands were more permissive.
		if (dlg_script) {
			Debug::Printf(kDbgGroup_Game, kDbgMsg_Error, "SetDialogOption: Invalid option number specified (%d : %d)", dlg, opt);
			return;
		}
		quit("!SetDialogOption: Invalid option number specified");
	}
	opt--;

	_G(dialog)[dlg].optionflags[opt] &= ~DFLG_ON;
	if ((onoroff == 1) && ((_G(dialog)[dlg].optionflags[opt] & DFLG_OFFPERM) == 0))
		_G(dialog)[dlg].optionflags[opt] |= DFLG_ON;
	else if (onoroff == 2)
		_G(dialog)[dlg].optionflags[opt] |= DFLG_OFFPERM;
}

int GetDialogOption(int dlg, int opt) {
	if ((dlg < 0) || (dlg >= _GP(game).numdialog))
		quit("!GetDialogOption: Invalid topic number specified");
	if ((opt < 1) || (opt > _G(dialog)[dlg].numoptions))
		quit("!GetDialogOption: Invalid option number specified");
	opt--;

	if (_G(dialog)[dlg].optionflags[opt] & DFLG_OFFPERM)
		return 2;
	if (_G(dialog)[dlg].optionflags[opt] & DFLG_ON)
		return 1;
	return 0;
}

} // namespace AGS3