provider "hcloud" {
  token = var.hcloud_token
}

provider "aws" {
  access_key                  = var.s3_access_key
  secret_key                  = var.s3_secret_key
  region                      = var.s3_region
  skip_credentials_validation = true
  skip_metadata_api_check     = true
  skip_region_validation      = true
  skip_requesting_account_id  = true
  s3_use_path_style           = true

  endpoints {
    s3 = var.s3_endpoint
  }
}

resource "hcloud_network" "main" {
  name     = "${var.project_name}-network"
  ip_range = "10.0.0.0/16"
}

resource "hcloud_network_subnet" "main" {
  network_id   = hcloud_network.main.id
  type         = "cloud"
  network_zone = var.network_zone
  ip_range     = "10.0.1.0/24"
}

resource "hcloud_firewall" "nodes" {
  name = "${var.project_name}-nodes"

  rule {
    direction  = "in"
    protocol   = "tcp"
    port       = "22"
    source_ips = var.ssh_source_cidrs
  }

  rule {
    direction  = "in"
    protocol   = "tcp"
    port       = "8080"
    source_ips = [hcloud_network.main.ip_range]
  }

  rule {
    direction = "in"
    protocol  = "icmp"
    source_ips = [
      "0.0.0.0/0",
      "::/0",
    ]
  }
}

module "prod" {
  source = "./modules/compute"

  name         = "${var.project_name}-prod"
  server_type  = var.server_type
  location     = var.server_location
  ssh_key_ids  = var.ssh_key_ids
  firewall_ids = [hcloud_firewall.nodes.id]
  network_id   = hcloud_network.main.id
  private_ip   = var.prod_private_ip
  environment  = "prod"
  depends_on   = [hcloud_network_subnet.main]
}

module "staging" {
  source = "./modules/compute"

  name         = "${var.project_name}-staging"
  server_type  = var.server_type
  location     = var.server_location
  ssh_key_ids  = var.ssh_key_ids
  firewall_ids = [hcloud_firewall.nodes.id]
  network_id   = hcloud_network.main.id
  private_ip   = var.staging_private_ip
  environment  = "staging"
  depends_on   = [hcloud_network_subnet.main]
}

module "storage" {
  source = "./modules/storage"

  bucket_name = var.bucket_name
}

resource "hcloud_load_balancer" "app" {
  name               = "${var.project_name}-lb"
  load_balancer_type = "lb11"
  location           = var.server_location
  algorithm {
    type = "round_robin"
  }
}

resource "hcloud_load_balancer_network" "app" {
  load_balancer_id = hcloud_load_balancer.app.id
  network_id       = hcloud_network.main.id
  depends_on       = [hcloud_network_subnet.main]
}

resource "hcloud_load_balancer_target" "prod" {
  type             = "server"
  load_balancer_id = hcloud_load_balancer.app.id
  server_id        = module.prod.server_id
  use_private_ip   = true
  depends_on = [
    hcloud_load_balancer_network.app,
    module.prod,
  ]
}

resource "hcloud_load_balancer_service" "http" {
  load_balancer_id = hcloud_load_balancer.app.id
  protocol         = "http"
  listen_port      = 80
  destination_port = 8080

  http {
    sticky_sessions = false
  }

  health_check {
    protocol = "http"
    port     = 8080
    interval = 15
    timeout  = 10
    retries  = 3
    http {
      path         = "/healthz"
      status_codes = ["200"]
    }
  }
}