package se.urmo.game.state;

import se.urmo.game.GameMap;

public class CollisionChecker {
    private GameMap map;

    public CollisionChecker(GameMap map) {
        this.map = map;
    }

    public boolean canMoveTo(int dir, int objectLeft, int objectTop, int width, int height) {
        int objectRight = objectLeft + width;
        int objectBotton = objectTop + height;
        return switch (dir){
            case 0 -> isPassibleRight(objectRight, objectTop, objectBotton);// right
            case 1 -> isPassibleLeft(objectLeft, objectTop, objectBotton);// right
            case 2 -> isPassibleBottom(objectLeft, objectRight, objectBotton);
            case 3 -> isPassibleTop(objectLeft, objectRight, objectTop);// right
            default -> throw new IllegalArgumentException("Invalid dir: " + dir);
        };
    }

    private boolean isPassibleBottom(int objectLeft, int objectRight, int objectBotton) {
        return map.isPassable(objectLeft, objectBotton) && map.isPassable(objectRight, objectBotton);
    }

    private boolean isPassibleTop(int objectLeft, int objectRight, int objectTop) {
        return map.isPassable(objectLeft, objectTop) && map.isPassable(objectRight, objectTop);
    }

    private boolean isPassibleLeft(int objectLeft, int objectTop, int objectBotton) {
        return map.isPassable(objectLeft, objectTop) && map.isPassable(objectLeft, objectBotton);
    }

    private boolean isPassibleRight(int objectRight, int objectTop, int objectBotton) {
        return map.isPassable(objectRight, objectTop) && map.isPassable(objectRight, objectBotton);
    }
}