/*
   Kitsune's Curse
   Copyright (C) 2020-2023 Juan J. Martinez <jjm@usebox.net>

   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 <https://www.gnu.org/licenses/>.
 */
#include "splib.h"
#include "main.h"

#include "maps.h"

// generated
#include "platform.h"

#include "entities.h"
#include "et_player.h"
#include "et_platform.h"

void draw_platform() {
    put_sprite4(platform[*it_frame], *it_x, *it_y, 1, 0);
    put_sprite4(platform[*it_frame], *it_x + 8, *it_y, 1, 0);
    erase_sprite(*it_ox, *it_oy, 1);
    erase_sprite(*it_ox + 8, *it_oy, 1);
}

void update_platform() {

    // check limit and change direction
    if ((*it_delay)++ >= *it_extra)
    {
        *it_delay = 1;
        *it_param ^= 128;
    }

    // track player if on the platform
    if (check_for_point(sp_it, px + 1, py + 24, 16, 8)
            || check_for_point(sp_it, px + 6, py + 24, 16, 8))
    {
        py = *it_y - 24;

        if (*it_delay & 1)
            return;

        if (*it_param)
        {
            if (!is_map_blocked(px + 8, py + (player_h ? 6 : 0))
                    && !is_map_blocked(px + 8, py + 23))
                px += 2;
        }
        else
        {
            if (!is_map_blocked(px - 1, py + (player_h ? 6 : 0))
                    && !is_map_blocked(px - 1, py + 23))
                px -= 2;
        }
    }
    else if (*it_delay & 1)
        return;

    if (*it_param)
        *it_x += 2;
    else
        *it_x -= 2;
}