package net.shadowfacts.cacao.view.textfield

/**
 * @author shadowfacts
 */
open class NumberField(
	initialValue: Int,
	handler: ((NumberField) -> Unit)? = null,
): AbstractTextField<NumberField>(initialValue.toString()) {

	var number: Int?
		get() {
			return if (isTextTemporarilyAllowed(text)) {
				null
			} else {
				try {
					Integer.parseInt(text)
				} catch (e: NumberFormatException) {
					null
				}
			}
		}
		set(value) {
			text = value?.toString() ?: ""
		}

	var validator: ((Int) -> Boolean)? = null

	init {
		this.handler = handler
	}

	override fun validate(proposedText: String): Boolean {
		return isTextTemporarilyAllowed(proposedText) || try {
			val value = Integer.parseInt(proposedText)
			validator?.invoke(value) ?: true
		} catch (e: NumberFormatException) {
			false
		}
	}

	private fun isTextTemporarilyAllowed(s: String): Boolean {
		return s.isEmpty() || s == "-"
	}

}