#include <gint/keyboard.h>
#include <gint/timer.h>
#include <gint/clock.h>

#include "core.h"

void analyze_input(struct game *game, const int last_key)
{
    game->total_tick += ENGINE_TICK;
    switch (last_key)
    {
        case KEY_UP:
            if (is_walkable(*game, UP)) game->world_y -= 1;
            game->player.direction = UP;
            break;

        case KEY_RIGHT:
            if (is_walkable(*game, RIGHT)) game->world_x += 1;
            game->player.direction = RIGHT;
            break;

        case KEY_DOWN:
            if (is_walkable(*game, DOWN)) game->world_y += 1;
            game->player.direction = DOWN;
            break;

        case KEY_LEFT:
            if (is_walkable(*game, LEFT)) game->world_x -= 1;
            game->player.direction = LEFT;
            break;
    }
}

int rtc_key(void)
{
    int opt = GETKEY_DEFAULT & ~GETKEY_MOD_SHIFT & ~GETKEY_MOD_ALPHA & ~GETKEY_REP_ARROWS;
    int timeout = 1;
        
    key_event_t ev = getkey_opt(opt, &timeout);
    if (ev.type == KEYEV_NONE) return 0;
        
    return ev.key;
}


int callback_tick(volatile int *tick)
{
    *tick = 1;
    return TIMER_CONTINUE;
}


int is_walkable(const struct game game, const int direction)
{
    switch (direction)
    {
        case UP:
            return game.map.collision[game.world_y + 4][game.world_x + 7];
            break;
        
        case RIGHT:
            return game.map.collision[game.world_y + 5][game.world_x + 8];
            break;

        case DOWN:
            return game.map.collision[game.world_y + 6][game.world_x + 7];
            break;

        case LEFT:
            return game.map.collision[game.world_y + 5][game.world_x + 6];
            break;
    }
    return 0;

}