package ObjectIdGenerator
import NoWurst
import ErrorHandling
import Preloader

public constant UNIT_ID_GEN = new IdGenerator('x000')
public constant HERO_ID_GEN = new IdGenerator('HM00')
public constant ABIL_ID_GEN = new IdGenerator('AM00')
public constant BUFF_ID_GEN = new IdGenerator('BM00')
public constant ITEM_ID_GEN = new IdGenerator('IM00')
public constant UPGD_ID_GEN = new IdGenerator('RM00')

public class IdGenerator
	private int i1
	private int i2
	private int i3
	private int i4

	construct(int start)
		i1 = start mod 256
		i2 = (start mod 65536) div 256
		i3 = (start mod 16777216) div 65536
		i4 = start div 16777216

	function isInvalid(int char) returns boolean
		return (char < 48 or (char > 57 and char < 97))

	function next() returns int
		if i1 < '~'
			i1++
			while isInvalid(i1)
				i1++
		else if i2 < '~'
			i1 = '!'
			i2++
			while isInvalid(i2)
				i2++
		else if i3 < '~'
			i1 = '!'
			i2 = '!'
			i3++
			while isInvalid(i3)
				i3++
		else if i4 < '~'
			i1 = '!'
			i2 = '!'
			i3 = '!'
			i4++
			while isInvalid(i4)
				i4++
		else
			error("No vaild id left")
			return 0
		let id = i1 + (i2 * 256) + (i3 * 65536) + (i4 * 16777216)
		if not compiletime
			preloadAbility(id)
		return id