#réation du réseau VPC
resource "google_compute_network" "my_vpc" {
  name                    = "mon-vpc"
  auto_create_subnetworks = false
}

# Création des sous-réseaux
resource "google_compute_subnetwork" "frontend" {
  name          = "frontend"
  ip_cidr_range = "10.0.1.0/24"
  region        = google_compute_network.my_vpc.region
  network       = google_compute_network.my_vpc.id
}

resource "google_compute_subnetwork" "backend" {
  name          = "backend"
  ip_cidr_range = "10.0.2.0/24"
  region        = google_compute_network.my_vpc.region
  network       = google_compute_network.my_vpc.id
}

resource "google_compute_subnetwork" "database" {
  name          = "database"
  ip_cidr_range = "10.0.3.0/24"
  region        = google_compute_network.my_vpc.region
  network       = google_compute_network.my_vpc.id
}

# Création des règles de firewall
resource "google_compute_firewall" "allow_http_https" {
  name       = "allow-http-https"
  network    = google_compute_network.my_vpc.id
  allowed    = [
    { IPProtocol = "tcp", ports = ["80", "443"] },
  ]
}

resource "google_compute_firewall" "allow_ssh" {
  name       = "allow-ssh"
  network    = google_compute_network.my_vpc.id
  allowed    = [
    { IPProtocol = "tcp", ports = ["22"] },
  ]
}

resource "google_compute_firewall" "frontend_to_backend" {
  name       = "frontend-to-backend"
  network    = google_compute_network.my_vpc.id
  allowed    = [
    { IPProtocol = "tcp", ports = ["8000"] },
  ]
  source_ranges = [
    google_compute_subnetwork.frontend.ip_cidr_range
  ]
  target_tags = ["backend"]
}

resource "google_compute_firewall" "backend_to_database" {
  name       = "backend-to-database"
  network    = google_compute_network.my_vpc.id
  allowed    = [
    { IPProtocol = "tcp", ports = ["3306"] },
  ]
  source_ranges = [
    google_compute_subnetwork.backend.ip_cidr_range
  ]
  target_tags = ["database"] 
}