terraform {
  required_version = ">= 1.0"
  required_providers {
    proxmox = {
      source  = "telmate/proxmox"
      version = "~> 2.9"
    }
    tls = {
      source  = "hashicorp/tls"
      version = "~> 4.0"
    }
  }
}

# Proxmox Provider Configuration
provider "proxmox" {
  pm_api_url          = var.proxmox_api_url
  pm_api_token_id     = var.proxmox_token_id
  pm_api_token_secret = var.proxmox_token_secret
  pm_tls_insecure     = var.proxmox_tls_insecure
}

# Generate SSH Key Pair
resource "tls_private_key" "vm_ssh_key" {
  algorithm = "RSA"
  rsa_bits  = 4096
}

# Proxmox VM Resource
resource "proxmox_vm_qemu" "loki_vm" {
  name        = var.vm_name
  target_node = var.target_node
  clone       = var.template_name
  
  # VM Resources
  cores   = var.vm_cores
  sockets = 1
  memory  = var.vm_memory
  
  # Boot Configuration
  boot    = "order=scsi0"
  agent   = 1
  onboot  = true
  
  # Disk Configuration
  disk {
    size    = var.vm_disk_size
    type    = "scsi"
    storage = var.storage
    iothread = 1
  }
  
  # Network Configuration
  network {
    model  = "virtio"
    bridge = var.network_bridge
  }
  
  # Cloud-init Configuration
  os_type   = "cloud-init"
  ipconfig0 = "ip=dhcp"
  
  # SSH Keys
  sshkeys = tls_private_key.vm_ssh_key.public_key_openssh
  
  # Wait for cloud-init to complete
  lifecycle {
    ignore_changes = [
      network,
    ]
  }

  # Connection settings for provisioners
  connection {
    type        = "ssh"
    user        = var.ssh_user
    private_key = tls_private_key.vm_ssh_key.private_key_pem
    host        = self.default_ipv4_address
    timeout     = "5m"
  }

  # Wait for VM to be ready
  provisioner "remote-exec" {
    inline = [
      "cloud-init status --wait",
      "echo 'VM is ready'",
    ]
  }

  # Copy Loki configuration
  provisioner "file" {
    source      = "${path.module}/loki-config.yaml"
    destination = "/tmp/loki-config.yaml"
  }

  # Copy Promtail configuration
  provisioner "file" {
    source      = "${path.module}/promtail-config.yaml"
    destination = "/tmp/promtail-config.yaml"
  }

  # Copy Loki installation script
  provisioner "file" {
    source      = "${path.module}/install_loki.sh"
    destination = "/tmp/install_loki.sh"
  }

  # Copy Promtail installation script
  provisioner "file" {
    source      = "${path.module}/install_promtail.sh"
    destination = "/tmp/install_promtail.sh"
  }

  # Execute installation scripts
  provisioner "remote-exec" {
    inline = [
      "echo 'Starting installation...'",
      "sudo chmod +x /tmp/install_loki.sh",
      "sudo chmod +x /tmp/install_promtail.sh",
      "echo 'Installing Grafana Loki...'",
      "sudo /tmp/install_loki.sh",
      "echo 'Installing Promtail...'",
      "sudo /tmp/install_promtail.sh",
      "echo 'Installation completed!'",
    ]
  }
}