# Provider Configuration
provider "hcloud" {
  token = var.hcloud_token
}

# hcloud provider handles both Cloud and DNS resources

# Per-Client SSH Keys
resource "hcloud_ssh_key" "client" {
  for_each   = var.clients
  name       = "client-${each.key}-deploy-key"
  public_key = file("${path.module}/../keys/ssh/${each.key}.pub")
}

# Firewall Rules
resource "hcloud_firewall" "client_firewall" {
  name = "client-default-firewall"

  # SSH (restricted - add your management IPs here)
  rule {
    direction = "in"
    protocol  = "tcp"
    port      = "22"
    source_ips = [
      "0.0.0.0/0",  # CHANGE THIS: Replace with your management IP
      "::/0"
    ]
  }

  # HTTP (for Let's Encrypt challenge)
  rule {
    direction = "in"
    protocol  = "tcp"
    port      = "80"
    source_ips = [
      "0.0.0.0/0",
      "::/0"
    ]
  }

  # HTTPS
  rule {
    direction = "in"
    protocol  = "tcp"
    port      = "443"
    source_ips = [
      "0.0.0.0/0",
      "::/0"
    ]
  }
}

# Client VPS Instances
resource "hcloud_server" "client" {
  for_each = var.clients

  name        = each.key
  server_type = each.value.server_type
  image       = "ubuntu-24.04"
  location    = each.value.location
  ssh_keys    = [hcloud_ssh_key.client[each.key].id]
  firewall_ids = [hcloud_firewall.client_firewall.id]

  labels = {
    client = each.key
    role   = "app-server"
    # Note: labels can't contain special chars, store apps list separately if needed
  }

  # Enable backups if requested
  backups = var.enable_snapshots

  # Public network configuration (can be disabled for private-only servers)
  public_net {
    ipv4_enabled = lookup(each.value, "public_ip_enabled", true)
    ipv6_enabled = lookup(each.value, "public_ip_enabled", true)
  }

  # Private network (required for servers without public IP)
  dynamic "network" {
    for_each = lookup(each.value, "private_ip", null) != null ? [1] : []
    content {
      network_id = hcloud_network.private.id
      ip         = each.value.private_ip
    }
  }

  # User data for initial setup
  user_data = lookup(each.value, "public_ip_enabled", true) == false ? templatefile("${path.module}/user-data-private.yml", {
    hostname = each.key
  }) : templatefile("${path.module}/user-data-public.yml", {
    hostname = each.key
  })
}