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

data "aws_availability_zones" "available" { state = "available" }

locals {
  region_abbr = split("-", data.aws_availability_zones.available.zone_ids[0])[0]

  share_names = {
    for k, v in var.resource_shares :
    k => "${var.name_prefix}-${local.region_abbr}-${v.name_suffix}"
  }

  module_tags = {
    managed-by  = "terraform"
    module-name = "network:ram-share"
  }

  # Flatten resource_arns lists per share into a single association map
  resource_association_map = {
    for item in flatten([
      for k, v in var.resource_shares : [
        for idx, arn in v.resource_arns : {
          key       = "${k}-resource-${format("%02d", idx + 1)}"
          share_key = k
          arn       = arn
        }
      ]
    ]) : item.key => item
  }

  # Flatten principals lists per share into a single association map
  principal_association_map = {
    for item in flatten([
      for k, v in var.resource_shares : [
        for idx, principal in v.principals : {
          key       = "${k}-principal-${format("%02d", idx + 1)}"
          share_key = k
          principal = principal
        }
      ]
    ]) : item.key => item
  }
}