extends Control

func _on_quit_pressed() -> void:
	get_tree().change_scene_to_file("res://Scenes/2024/2024.tscn")

@onready var input_edit: TextEdit = $Input
@onready var error_label: Label = $Error
@onready var part_1_out: Label = $Part1Out
@onready var part_2_out: Label = $Part2Out

func _on_go_pressed() -> void:
	var input_text = input_edit.text
	part_1_out.text = part_1(input_text)
	part_2_out.text = part_2(input_text)

func set_error(msg: String) -> void:
	error_label.text = msg

func part_1(input_text: String) -> String:
	var lines = split_lines(input_text)
	if lines == []:
		return ""
	return str(get_diff(lines[0], lines[1]))

func split_lines(input: String) -> Array[Array]:
	var lines = input.split("\n")
	var left = [];
	var right = [];
	for line in lines:
		var parts = line.split("   ")
		if parts.size() != 2:
			set_error("invalid input!")
			return []
		left.append(parts[0] as int)
		right.append(parts[1] as int)
	return [left, right]

func get_diff(left: Array, right: Array) -> int:
	left.sort()
	right.sort()
	var diff = 0
	for i in range(left.size()):
		diff += abs(right[i] - left[i])
	return diff
	
func part_2(input_text: String) -> String:
	var lines = split_lines(input_text)
	if lines == []:
		return ""
	return str(get_similarity(lines[0], lines[1]))

func get_similarity(left: Array, right: Array) -> int:
	var similarity = 0
	for n in left:
		similarity += n * right.count(n)
	return similarity