# Include root configuration
include "root" {
  path = find_in_parent_folders("root.hcl")
}

# Terragrunt configuration
terraform {
  source = "."
}

# Generate the main Terraform configuration
generate "main" {
  path      = "main.tf"
  if_exists = "overwrite"
  contents  = <<EOF
# Hetzner Cloud Infrastructure for Forgejo

variable "project_name" {
  description = "Project name"
  type        = string
}

variable "environment" {
  description = "Environment name"
  type        = string
}

variable "location" {
  description = "Hetzner location"
  type        = string
}

variable "common_labels" {
  description = "Common labels for all resources"
  type        = map(string)
}

variable "server_type" {
  description = "Server type for Forgejo"
  type        = string
  default     = "cpx21"  # 4 vCPU, 8GB RAM, 80GB SSD
}

variable "ssh_keys" {
  description = "List of SSH key IDs or names to add to server"
  type        = list(string)
  default     = []
}

variable "domain_name" {
  description = "Domain name for Forgejo"
  type        = string
  default     = ""
}

# Data sources
data "hcloud_ssh_keys" "all" {
  count = length(var.ssh_keys) > 0 ? 0 : 1
}

# Network for private communication
resource "hcloud_network" "forgejo" {
  name     = "$${var.project_name}-$${var.environment}-network"
  ip_range = "10.0.0.0/16"
  labels   = var.common_labels
}

resource "hcloud_network_subnet" "forgejo" {
  network_id   = hcloud_network.forgejo.id
  type         = "cloud"
  network_zone = "eu-central"
  ip_range     = "10.0.1.0/24"
}

# Firewall
resource "hcloud_firewall" "forgejo" {
  name   = "$${var.project_name}-$${var.environment}-firewall"
  labels = var.common_labels

  rule {
    direction = "in"
    protocol  = "tcp"
    port      = "22"
    source_ips = [
      "0.0.0.0/0",
      "::/0"
    ]
    description = "SSH access"
  }

  rule {
    direction = "in"
    protocol  = "tcp"
    port      = "80"
    source_ips = [
      "0.0.0.0/0",
      "::/0"
    ]
    description = "HTTP"
  }

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

  rule {
    direction = "in"
    protocol  = "tcp"
    port      = "2222"
    source_ips = [
      "0.0.0.0/0",
      "::/0"
    ]
    description = "SSH alternative port"
  }

  rule {
    direction = "in"
    protocol  = "icmp"
    source_ips = [
      "0.0.0.0/0",
      "::/0"
    ]
    description = "ICMP (ping)"
  }
}

# Placement Group for better availability
resource "hcloud_placement_group" "forgejo" {
  name   = "$${var.project_name}-$${var.environment}"
  type   = "spread"
  labels = var.common_labels
}

# Cloud-init configuration
data "cloudinit_config" "forgejo" {
  gzip          = false
  base64_encode = false

  part {
    content_type = "text/cloud-config"
    content = yamlencode({
      package_update  = true
      package_upgrade = true

      packages = [
        "apt-transport-https",
        "ca-certificates",
        "curl",
        "gnupg",
        "lsb-release",
        "python3",
        "python3-pip",
        "ufw"
      ]

      write_files = [
        {
          path = "/etc/sysctl.d/99-forgejo.conf"
          content = <<-SYSCTL
          # Forgejo optimizations
          net.core.somaxconn = 1024
          net.ipv4.tcp_max_syn_backlog = 2048
          net.ipv4.ip_forward = 1
          vm.swappiness = 10
          fs.file-max = 65535
          SYSCTL
        }
      ]

      runcmd = [
        "sysctl -p /etc/sysctl.d/99-forgejo.conf",
        "systemctl enable ssh",
        "ufw --force enable",
        "ufw allow 22/tcp",
        "ufw allow 80/tcp",
        "ufw allow 443/tcp",
        "ufw allow 2222/tcp"
      ]
    })
  }
}

# Server
resource "hcloud_server" "forgejo" {
  name               = "$${var.project_name}-$${var.environment}"
  server_type        = var.server_type
  image              = "ubuntu-24.04"
  location           = var.location
  ssh_keys           = length(var.ssh_keys) > 0 ? var.ssh_keys : data.hcloud_ssh_keys.all[0].ssh_keys[*].id
  placement_group_id = hcloud_placement_group.forgejo.id
  user_data          = data.cloudinit_config.forgejo.rendered

  labels = var.common_labels

  public_net {
    ipv4_enabled = true
    ipv6_enabled = true
  }

  firewall_ids = [hcloud_firewall.forgejo.id]

  # Attach to private network
  network {
    network_id = hcloud_network.forgejo.id
    ip         = "10.0.1.5"
  }

  depends_on = [hcloud_network_subnet.forgejo]
}

# Volume for data persistence
resource "hcloud_volume" "forgejo_data" {
  name     = "$${var.project_name}-$${var.environment}-data"
  size     = 50
  location = var.location
  format   = "ext4"
  labels   = var.common_labels
}

resource "hcloud_volume_attachment" "forgejo_data" {
  volume_id = hcloud_volume.forgejo_data.id
  server_id = hcloud_server.forgejo.id
  automount = false  # We'll mount via Ansible for better control
}

# Outputs
output "server_id" {
  description = "Server ID"
  value       = hcloud_server.forgejo.id
}

output "server_name" {
  description = "Server name"
  value       = hcloud_server.forgejo.name
}

output "server_ipv4" {
  description = "Server IPv4 address"
  value       = hcloud_server.forgejo.ipv4_address
}

output "server_ipv6" {
  description = "Server IPv6 address"
  value       = hcloud_server.forgejo.ipv6_address
}

output "server_private_ip" {
  description = "Server private IP"
  value       = hcloud_server.forgejo.network[0].ip
}

output "volume_id" {
  description = "Data volume ID"
  value       = hcloud_volume.forgejo_data.id
}

output "volume_device" {
  description = "Volume device path"
  value       = "/dev/disk/by-id/scsi-0HC_Volume_$${hcloud_volume.forgejo_data.id}"
}

output "network_id" {
  description = "Network ID"
  value       = hcloud_network.forgejo.id
}

output "ssh_command" {
  description = "SSH command to connect"
  value       = "ssh root@$${hcloud_server.forgejo.ipv4_address}"
}

output "dns_records" {
  description = "DNS records to create"
  value = var.domain_name != "" ? {
    ipv4 = "$${var.domain_name} IN A $${hcloud_server.forgejo.ipv4_address}"
    ipv6 = "$${var.domain_name} IN AAAA $${hcloud_server.forgejo.ipv6_address}"
  } : {}
}
EOF
}

# Generate cloudinit provider
generate "cloudinit_provider" {
  path      = "cloudinit.tf"
  if_exists = "overwrite"
  contents  = <<EOF
terraform {
  required_providers {
    cloudinit = {
      source  = "hashicorp/cloudinit"
      version = "~> 2.3"
    }
  }
}
EOF
}