# Variables ====================================================================

variable "name_prefix" {
  description = "Prefix prepended to resource names created by this module"
  type        = string

  validation {
    condition     = length(trimspace(var.name_prefix)) > 0
    error_message = "name_prefix must not be empty."
  }
}

variable "aws_region" {
  description = "AWS region to build service_name endpoints against (e.g. com.amazonaws.<region>.<service>)"
  type        = string

  validation {
    condition     = can(regex("^[a-z]{2}-[a-z]+-[0-9]$", var.aws_region))
    error_message = "aws_region must be a valid AWS region format e.g. us-west-2."
  }
}

variable "vpc_id" {
  description = "VPC ID in which to create endpoints"
  type        = string
}

variable "vpc_cidr_block" {
  description = "Primary VPC CIDR block, used to scope the interface endpoint security group's ingress rule"
  type        = string

  validation {
    condition     = can(cidrhost(var.vpc_cidr_block, 0))
    error_message = "vpc_cidr_block must be valid IPv4 CIDR notation."
  }
}

variable "subnet_ids" {
  description = "Subnet IDs to place Interface endpoint ENIs in. Required when any endpoint in var.endpoints has type = \"Interface\"."
  type        = list(string)
  default     = []
}

variable "route_table_ids" {
  description = "Route table IDs to associate with Gateway endpoints. Required when any endpoint in var.endpoints has type = \"Gateway\"."
  type        = list(string)
  default     = []
}

variable "endpoints" {
  description = <<-EOT
    Map of endpoint definitions to create. No default — the caller decides
    which services are needed. service_name is the short AWS service name
    (e.g. "s3", "kms"). type must be "Gateway" or "Interface".
  EOT
  type = map(object({
    service_name        = string
    type                = string
    private_dns_enabled = optional(bool, true)
    policy              = optional(string, null)
  }))

  validation {
    condition = alltrue([
      for k, v in var.endpoints : contains(["Gateway", "Interface"], v.type)
    ])
    error_message = "Each endpoint's type must be either \"Gateway\" or \"Interface\"."
  }

  validation {
    condition = alltrue([
      for k, v in var.endpoints : length(trimspace(v.service_name)) > 0
    ])
    error_message = "Each endpoint's service_name must not be empty."
  }
}

variable "tags" {
  description = "Resource tags to apply to all resources"
  type        = map(string)
  default     = {}
}