# Input variables for the Terraform configuration

variable "aws_region" {
  description = "AWS region for resources"
  type        = string
  default     = "us-west-2"
}

variable "instance_type" {
  description = "EC2 instance type"
  type        = string
  default     = "t3.micro"
  
  validation {
    condition = contains([
      "t3.micro", "t3.small", "t3.medium",
      "t2.micro", "t2.small", "t2.medium"
    ], var.instance_type)
    error_message = "Instance type must be a valid t2 or t3 instance type."
  }
}

variable "environment" {
  description = "Environment name (dev, staging, prod)"
  type        = string
  default     = "dev"
  
  validation {
    condition     = contains(["dev", "staging", "prod"], var.environment)
    error_message = "Environment must be dev, staging, or prod."
  }
}

variable "project_name" {
  description = "Name of the project"
  type        = string
  default     = "terraform-test"
  
  validation {
    condition     = can(regex("^[a-z0-9-]+$", var.project_name))
    error_message = "Project name must contain only lowercase letters, numbers, and hyphens."
  }
}

variable "enable_monitoring" {
  description = "Enable CloudWatch monitoring"
  type        = bool
  default     = false
}

variable "allowed_cidr_blocks" {
  description = "List of CIDR blocks allowed to access the application"
  type        = list(string)
  default     = ["0.0.0.0/0"]
}

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