# VPC
resource "google_compute_network" "vpc" {
  name                    = "tp7"
  auto_create_subnetworks = false
}

# Sous-réseau frontend
resource "google_compute_subnetwork" "frontend" {
  name          = "frontend"
  network       = google_compute_network.vpc.id
  ip_cidr_range = var.frontend_cidr
  region        = "europe-west4"
}

# Sous-réseau backend
resource "google_compute_subnetwork" "backend" {
  name          = "backend"
  network       = google_compute_network.vpc.id
  ip_cidr_range = var.backend_cidr
  region        = "europe-west4"
}

# Sous-réseau database
resource "google_compute_subnetwork" "database" {
  name          = "database"
  network       = google_compute_network.vpc.id
  ip_cidr_range = var.database_cidr
  region        = "europe-west4"
}

# Règle de pare-feu
resource "google_compute_firewall" "allow_ssh" {
  name    = "allow-ssh"
  network = google_compute_network.vpc.id

  allow {
    protocol = "tcp"
    ports    = ["22"]
  }

  source_ranges = ["0.0.0.0/0"]
  target_tags   = ["ssh"]
}

resource "google_compute_firewall" "allow_http" {
  name    = "allow-http"
  network = google_compute_network.vpc.id

  allow {
    protocol = "tcp"
    ports    = ["80, 443"]
  }

  source_ranges = ["0.0.0.0/0"]
  target_tags   = ["web"]
}

resource "google_compute_firewall" "allow_front-to-back" {
  name    = "allow-front-to-back"
  network = google_compute_network.vpc.id

  allow {
    protocol = "tcp"
    ports    = ["8080"]
  }

  source_ranges = ["frontend"]
  target_tags   = ["backend"]
}

resource "google_compute_firewall" "allow_back-to-db" {
  name    = "allow-back-to-db"
  network = google_compute_network.vpc.id

  allow {
    protocol = "tcp"
    ports    = ["3306"]
  }

  source_ranges = ["backend"]
  target_tags   = ["database"]
}