# locals =====================================================================

locals {
  # Module-level tags stamped on every OU, merged with per-OU tags.
  # Precedence: module defaults < per-OU tags
  module_tags = {
    ManagedBy = "terraform"
    Module    = "governance/ou"
  }

  ou_tags = {
    for ou_key, ou in var.organizational_units :
    ou_key => merge(local.module_tags, ou.tags)
  }

  # OUs separated by level for hierarchical creation order.
  level1_ous = {
    for ou_key, ou in var.organizational_units : ou_key => ou
    if ou.parent_key == "root"
  }

  level2_ous = {
    for ou_key, ou in var.organizational_units : ou_key => ou
    if ou.parent_key != "root" && contains(keys(local.level1_ous), ou.parent_key)
  }

  level3_ous = {
    for ou_key, ou in var.organizational_units : ou_key => ou
    if ou.parent_key != "root" && !contains(keys(local.level1_ous), ou.parent_key)
  }
}