class_name MapEntry

var src_start := 0
var dst_start := 0
var src_end := 0
var dst_end := 0
var range := 0

func _to_string():
	return str(self.src_start) + " -> " + str(self.dst_start) + " (" + str(self.range) + ")"

func apply(input):
	# Big ints are sus, be safe
	var d_start = input - src_start

	if d_start < 0 or d_start >= self.range:
		return null
	
	return dst_start + d_start

func apply_rev(input):
	# Big ints are sus, be safe
	var d_start = input - dst_start

	if d_start < 0 or d_start >= self.range:
		return null
	
	return src_start + d_start