variable "input" {
  type = string
}

locals {
  cleaned_input = replace(var.input, "/ +/", " ")   
  lines = split("\n", trim(local.cleaned_input, "\n"))
  lines_split = [for line in local.lines: split(" ", line)]
  left = [for line in local.lines_split: parseint(line[0], 10)]
  right = [for line in local.lines_split: parseint(line[1], 10)]

  left_sorted = sort(local.left)
  right_sorted = sort(local.right)

  diffs = [for i in range(length(local.left_sorted)): abs(local.left_sorted[i] - local.right_sorted[i])]

  counts = {for num in local.right: num => num...}

  matching = [for left in local.left: left * length(lookup(local.counts, left, []))]
}

output "part1" {
  value = sum(local.diffs)
}

output "part2" {
    value = sum(local.matching)
}