Development Environments

┌─────────────────────────────────────────────────────────────┐
│                    Developer Workstation                     │
└─────────────────────────────────────────────────────────────┘
                              │
                              │ SSH / VS Code Remote
                              ▼
┌─────────────────────────────────────────────────────────────┐
│                    Development VPC                           │
│  ┌──────────────────────────────────────────────────────┐   │
│  │              Developer EC2 Instance                   │   │
│  │  ┌─────────┐ ┌─────────┐ ┌─────────┐ ┌─────────┐     │   │
│  │  │  Git    │ │ Docker  │ │ Node.js │ │ Python  │     │   │
│  │  └─────────┘ └─────────┘ └─────────┘ └─────────┘     │   │
│  │  ┌─────────────────────────────────────────────────┐ │   │
│  │  │           Mounted EBS Volume                     │ │   │
│  │  │           (Persistent Workspace)                 │ │   │
│  │  └─────────────────────────────────────────────────┘ │   │
│  └──────────────────────────────────────────────────────┘   │
└─────────────────────────────────────────────────────────────┘

variable "developer_name" {
  type        = string
  description = "Name of the developer for resource naming"
}

module "dev_environment" {
  source  = "registry.patterneddesigns.ca/patterneddesigns/ec2-instance/aws"
  version = "1.5.0"

  instance_name      = "dev-${var.developer_name}"
  instance_type      = "t3.large"
  ami_id             = data.aws_ami.dev_tools.id
  subnet_id          = module.vpc.private_subnets[0]
  security_group_ids = [aws_security_group.dev.id]
  key_name           = aws_key_pair.developer[var.developer_name].key_name

  iam_instance_profile = aws_iam_instance_profile.developer.name

  # Use spot for cost savings (60-90% discount)
  spot_price = "0.05"
  spot_type  = "persistent"

  root_block_device = {
    volume_size = 100
    volume_type = "gp3"
    encrypted   = true
  }

  user_data = templatefile("${path.module}/scripts/dev-setup.sh", {
    developer_name = var.developer_name
    git_email      = "${var.developer_name}@example.com"
  })

  tags = {
    Environment = "development"
    Owner       = var.developer_name
    AutoStop    = "true"  # For scheduled shutdown
  }
}

# Lookup the latest dev tools AMI
data "aws_ami" "dev_tools" {
  most_recent = true
  owners      = ["self"]

  filter {
    name   = "name"
    values = ["dev-tools-*"]
  }
}

# Security group allowing SSH and VS Code Remote
resource "aws_security_group" "dev" {
  name        = "dev-environment-sg"
  description = "Security group for development environments"
  vpc_id      = module.vpc.vpc_id

  ingress {
    description = "SSH"
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = [var.office_cidr]
  }

  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

# Scheduled start/stop using EventBridge
resource "aws_cloudwatch_event_rule" "stop_dev_instances" {
  name                = "stop-dev-instances"
  description         = "Stop dev instances at end of work day"
  schedule_expression = "cron(0 18 ? * MON-FRI *)"  # 6 PM weekdays
}

resource "aws_cloudwatch_event_target" "stop_dev_instances" {
  rule      = aws_cloudwatch_event_rule.stop_dev_instances.name
  target_id = "StopDevInstances"
  arn       = "arn:aws:ssm:${data.aws_region.current.name}::automation-document/AWS-StopEC2Instance"
  role_arn  = aws_iam_role.eventbridge.arn

  input = jsonencode({
    InstanceId = [module.dev_environment.instance_id]
  })
}