# Local environment Terraform configuration
# Uses libvirt provider for KVM/QEMU VMs on Debian 13 host

terraform {
  required_version = ">= 1.5.0"

  required_providers {
    libvirt = {
      source  = "dmacvicar/libvirt"
      version = "~> 0.7.0"
    }
    template = {
      source  = "hashicorp/template"
      version = "~> 2.2.0"
    }
    random = {
      source  = "hashicorp/random"
      version = "~> 3.5.0"
    }
  }

  backend "local" {
    path = "../../../.terraform/terraform-local.tfstate"
  }
}

provider "libvirt" {
  uri = "qemu:///system"
}

# Random resources for uniqueness
resource "random_string" "suffix" {
  length  = 4
  special = false
  upper   = false
}

# Network for VMs
resource "libvirt_network" "ydn_dev" {
  name      = "ydn-dev-network"
  mode      = "nat"
  addresses = ["192.168.100.0/24"]

  dhcp {
    enabled = true
  }

  dns {
    enabled    = true
    local_only = false
  }
}

# VM Template (Debian 12 base image)
# Pre-existing base image assumed at /var/lib/libvirt/images/debian-12.qcow2
resource "libvirt_volume" "base" {
  name   = "ydn-dev-base-${random_string.suffix.result}"
  pool   = "default"
  source = "/var/lib/libvirt/images/debian-12.qcow2"
  format = "qcow2"
}

# Test VM for VPS provisioning
resource "libvirt_domain" "test_vps" {
  name   = "ydn-dev-test-vps-${random_string.suffix.result}"
  memory = "2048"
  vcpu   = 2

  network_interface {
    network_name = libvirt_network.ydn_dev.name
    wait_for_lease = true
  }

  disk {
    volume_id = libvirt_volume.base.id
  }

  console {
    type        = "pty"
    target_port = "0"
    target_type = "serial"
  }

  graphics {
    type        = "vnc"
    listen_type = "address"
    autoport    = true
  }

  xml {
    xslt = templatefile("${path.module}/templates/cloud-init.xsl", {
      hostname = "test-vps"
      ssh_key  = file("~/.ssh/id_rsa.pub")
    })
  }
}

# Output VM connection details
output "test_vps_ip" {
  description = "IP address of test VPS"
  value       = libvirt_domain.test_vps.network_interface.0.addresses.0
}

output "test_vps_name" {
  description = "Name of test VPS"
  value       = libvirt_domain.test_vps.name
}