# Foundation Layer Variables - FREE TIER OPTIMIZED
# Configuration variables for the enterprise CI/CD pipeline infrastructure

variable "project_name" {
  description = "Name of the project - used for resource naming"
  type        = string
  default     = "nvhi-atsila-microservice"
}

variable "environment" {
  description = "Environment name (dev, staging, prod)"
  type        = string
  default     = "dev"
}

variable "aws_region" {
  description = "AWS region for infrastructure deployment"
  type        = string
  default     = "us-east-1"
}

variable "vpc_cidr" {
  description = "CIDR block for the VPC"
  type        = string
  default     = "10.0.0.0/16"
}

variable "enable_dns_hostnames" {
  description = "Enable DNS hostnames in the VPC"
  type        = bool
  default     = true
}

variable "enable_dns_support" {
  description = "Enable DNS support in the VPC"
  type        = bool
  default     = true
}

variable "enable_nat_gateway" {
  description = "Enable NAT gateways for private subnets (only relevant if private subnets enabled)"
  type        = bool
  default     = false  # Default false for free tier
}

variable "single_nat_gateway" {
  description = "Use a single NAT gateway instead of one per AZ (cost optimization)"
  type        = bool
  default     = true   # Default true for cost optimization when NAT is enabled
}

variable "enable_private_subnets" {
  description = "Enable private subnets (requires NAT Gateway for internet access)"
  type        = bool
  default     = false  # Set to false for free tier to avoid NAT Gateway costs
}

variable "enable_vpc_endpoints" {
  description = "Enable VPC endpoints for AWS services (costs extra)"
  type        = bool
  default     = false  # Set to false for free tier to avoid interface endpoint costs
}

variable "cost_optimization_mode" {
  description = "Enable cost optimization features for free tier usage"
  type        = bool
  default     = true
}

variable "common_tags" {
  description = "Common tags to apply to all resources"
  type        = map(string)
  default = {
    Terraform   = "true"
    Project     = "enterprise-cicd"
    Owner       = "devops-team"
    CostCenter  = "engineering"
  }
}