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+# Terraform deployment for Data Commons Import Automation Workflow
+# This file sets up:
+# - Necessary GCP APIs
+# - Secret Manager for the import-config secret
+# - GCS Buckets for imports, mounting, and Dataflow templates
+# - Spanner Instance and Database with schema
+# - Artifact Registry for hosting Docker images (Flex Template & Executor)
+# - Pub/Sub Topic and Subscription for triggering imports
+# - Cloud Build Triggers for CI/CD of Executor, Functions, Workflows, and Ingestion Pipeline
+# - Unified Service Account with necessary IAM roles for Workflows, Functions, and Pub/Sub
+
+terraform {
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = ">= 5.0.0"
+    }
+    archive = {
+      source  = "hashicorp/archive"
+    }
+  }
+}
+
+variable "project_id" {
+  description = "The GCP Project ID"
+  type        = string
+}
+
+variable "region" {
+  description = "The GCP Region"
+  type        = string
+  default     = "us-central1"
+}
+
+variable "github_owner" {
+  description = "The owner of the GitHub repository"
+  type        = string
+  default     = "datacommonsorg"
+}
+
+variable "github_repo_name" {
+  description = "The name of the GitHub repository (data)"
+  type        = string
+  default     = "data"
+}
+
+variable "github_repo_ingestion_name" {
+  description = "The name of the GitHub repository (import)"
+  type        = string
+  default     = "import"
+}
+
+variable "spanner_instance_id" {
+  description = "Spanner Instance ID"
+  type        = string
+  default     = "datcom-import-instance"
+}
+
+variable "spanner_database_id" {
+  description = "Spanner Database ID"
+  type        = string
+  default     = "dc-import-db"
+}
+
+variable "bq_dataset_id" {
+  description = "BigQuery Dataset ID for aggregation"
+  type        = string
+  default     = "datacommons"
+}
+
+variable "dc_api_key" {
+  description = "Data Commons API Key"
+  type        = string
+  sensitive   = true
+}
+
+# --- APIs ---
+
+locals {
+  services = [
+    "artifactregistry.googleapis.com",
+    "batch.googleapis.com",
+    "cloudbuild.googleapis.com",
+    "cloudfunctions.googleapis.com",
+    "cloudscheduler.googleapis.com",
+    "compute.googleapis.com",
+    "dataflow.googleapis.com",
+    "iam.googleapis.com",
+    "pubsub.googleapis.com",
+    "run.googleapis.com",
+    "secretmanager.googleapis.com",
+    "spanner.googleapis.com",
+    "storage.googleapis.com",
+    "workflows.googleapis.com",
+  ]
+}
+
+resource "google_project_service" "services" {
+  for_each = toset(local.services)
+  project  = var.project_id
+  service  = each.key
+
+  disable_on_destroy = false
+}
+
+# --- Secret Manager ---
+
+resource "google_secret_manager_secret" "import_config" {
+  secret_id = "import-config"
+  project   = var.project_id
+
+  replication {
+    auto {}
+  }
+
+  depends_on = [google_project_service.services]
+}
+
+resource "google_secret_manager_secret_version" "import_config_v1" {
+  secret      = google_secret_manager_secret.import_config.id
+  secret_data = jsonencode({
+    dc_api_key = var.dc_api_key
+  })
+}
+
+resource "google_secret_manager_secret" "dc_api_key" {
+  secret_id = "dc-api-key"
+  project   = var.project_id
+
+  replication {
+    auto {}
+  }
+
+  depends_on = [google_project_service.services]
+}
+
+resource "google_secret_manager_secret_version" "dc_api_key_v1" {
+  secret      = google_secret_manager_secret.dc_api_key.id
+  secret_data = var.dc_api_key
+}
+
+# --- GCS Buckets ---
+
+resource "google_storage_bucket" "import_bucket" {
+  name     = "${var.project_id}-imports"
+  location = var.region
+  project  = var.project_id
+  uniform_bucket_level_access = true
+
+  depends_on = [google_project_service.services]
+}
+
+# --- Spanner ---
+
+resource "google_spanner_instance" "import_instance" {
+  name         = var.spanner_instance_id
+  config       = "regional-${var.region}"
+  display_name = "Import Automation Spanner Instance"
+  num_nodes    = 1
+  project      = var.project_id
+
+  depends_on = [google_project_service.services]
+}
+
+resource "google_spanner_database" "import_db" {
+  instance = google_spanner_instance.import_instance.name
+  name     = var.spanner_database_id
+  project  = var.project_id
+  ddl      = [for s in split(";", file("${path.module}/../workflow/spanner_schema.sql")) : trimspace(s) if trimspace(s) != ""]
+
+  deletion_protection = true
+}
+
+# Initialize IngestionLock (DML)
+resource "null_resource" "init_spanner_lock" {
+  provisioner "local-exec" {
+    command = <<EOT
+gcloud spanner databases execute-sql ${google_spanner_database.import_db.name} \
+  --instance=${google_spanner_instance.import_instance.name} \
+  --project=${var.project_id} \
+  --sql="INSERT INTO IngestionLock (LockID) VALUES ('global_ingestion_lock')" || echo 'Lock already exists'
+EOT
+  }
+
+  depends_on = [google_spanner_database.import_db]
+}
+
+# --- IAM ---
+
+resource "google_service_account" "automation_sa" {
+  account_id   = "import-automation-sa"
+  display_name = "Service Account for Import Automation (Workflows & Functions)"
+  project      = var.project_id
+}
+
+resource "google_project_iam_member" "automation_roles" {
+  for_each = toset([
+    "roles/workflows.admin",
+    "roles/cloudfunctions.admin",
+    "roles/run.admin",
+    "roles/run.invoker",
+    "roles/batch.jobsEditor",
+    "roles/dataflow.admin",
+    "roles/logging.logWriter",
+    "roles/storage.objectAdmin",
+    "roles/iam.serviceAccountUser",
+    "roles/spanner.databaseAdmin",
+    "roles/bigquery.dataEditor",
+    "roles/bigquery.jobUser",
+    "roles/artifactregistry.admin",
+    "roles/secretmanager.secretAccessor",
+    "roles/cloudbuild.builds.builder",
+  ])
+  project = var.project_id
+  role    = each.key
+  member  = "service_account:${google_service_account.automation_sa.email}"
+}
+
+# --- Artifact Registry ---
+
+resource "google_artifact_registry_repository" "automation_repo" {
+  location      = var.region
+  repository_id = "import-automation"
+  description   = "Docker repository for import automation images"
+  format        = "DOCKER"
+  project       = var.project_id
+
+  depends_on = [google_project_service.services]
+}
+
+# --- Cloud Build Triggers ---
+
+resource "google_cloudbuild_trigger" "executor_trigger" {
+  name        = "dc-import-executor"
+  location    = var.region
+  project     = var.project_id
+  
+  github {
+    owner = var.github_owner
+    name  = var.github_repo_name
+    push {
+      branch = "^main$"
+    }
+  }
+
+  filename = "import-automation/executor/cloudbuild.yaml"
+  
+  substitutions = {
+    _DOCKER_IMAGE = "${var.region}-docker.pkg.dev/${var.project_id}/${google_artifact_registry_repository.automation_repo.name}/dc-import-executor"
+  }
+
+  service_account = google_service_account.automation_sa.id
+  depends_on      = [google_artifact_registry_repository.automation_repo]
+}
+
+resource "google_cloudbuild_trigger" "workflow_trigger" {
+  name        = "import-workflow-trigger"
+  location    = var.region
+  project     = var.project_id
+  
+  github {
+    owner = var.github_owner
+    name  = var.github_repo_name
+    push {
+      branch = "^main$"
+    }
+  }
+
+  filename = "import-automation/workflow/cloudbuild_main.yaml"
+
+  substitutions = {
+    _PROJECT_ID          = var.project_id
+    _SPANNER_PROJECT_ID  = var.project_id
+    _SPANNER_INSTANCE_ID = var.spanner_instance_id
+    _SPANNER_DATABASE_ID = var.spanner_database_id
+    _GCS_BUCKET_ID       = google_storage_bucket.import_bucket.name
+    _LOCATION            = var.region
+    _GCS_MOUNT_BUCKET    = "${var.project_id}-mount"
+    _BQ_DATASET_ID       = var.bq_dataset_id
+  }
+
+  service_account = google_service_account.automation_sa.id
+}
+
+resource "google_cloudbuild_trigger" "ingestion_trigger" {
+  name        = "ingestion-pipeline-trigger"
+  location    = var.region
+  project     = var.project_id
+  
+  github {
+    owner = var.github_owner
+    name  = var.github_repo_ingestion_name
+    push {
+      branch = "^main$"
+    }
+  }
+
+  filename = "pipeline/ingestion/cloudbuild.yaml"
+
+  substitutions = {
+    _TEMPLATE_BUCKET = google_storage_bucket.import_bucket.name
+    _IMAGE_GCR_PATH  = "${var.region}-docker.pkg.dev/${var.project_id}/${google_artifact_registry_repository.automation_repo.name}/dataflow-templates/ingestion"
+    _VERSION         = "0.1-SNAPSHOT"
+  }
+
+  service_account = google_service_account.automation_sa.id
+  depends_on      = [
+    google_artifact_registry_repository.automation_repo,
+    google_storage_bucket.import_bucket
+  ]
+}
+
+resource "google_cloudbuild_trigger" "import_tool_trigger" {
+  name        = "dc-import-tool-trigger"
+  location    = var.region
+  project     = var.project_id
+  
+  github {
+    owner = var.github_owner
+    name  = var.github_repo_ingestion_name
+    push {
+      branch = "^main$"
+    }
+  }
+
+  filename = "cloudbuild.yaml"
+
+  substitutions = {
+    _GCS_BUCKET   = google_storage_bucket.import_bucket.name
+    _DOCKER_IMAGE = "${var.region}-docker.pkg.dev/${var.project_id}/${google_artifact_registry_repository.automation_repo.name}/dc-import-executor"
+  }
+
+  service_account = google_service_account.automation_sa.id
+}
+
+# --- Pub/Sub ---
+
+resource "google_pubsub_topic" "import_automation_trigger" {
+  name    = "import-automation-trigger"
+  project = var.project_id
+}
+
+resource "google_pubsub_subscription" "import_automation_sub" {
+  name    = "import-automation-sub"
+  topic   = google_pubsub_topic.import_automation_trigger.name
+  project = var.project_id
+
+  filter = "attributes.transfer_status=\"TRANSFER_COMPLETED\""
+
+  push_config {
+    # Note: This endpoint is deployed via Cloud Build. 
+    # The URL pattern below assumes Function Gen2 deployment.
+    push_endpoint = "https://import-automation-helper-${var.project_id}-${var.region}.a.run.app"
+    oidc_token {
+      service_account_email = google_service_account.automation_sa.email
+    }
+  }
+}
+
+# --- Trigger Initial Builds ---
+
+resource "null_resource" "trigger_initial_builds" {
+  provisioner "local-exec" {
+    command = <<EOT
+gcloud builds triggers run ${google_cloudbuild_trigger.executor_trigger.name} --region=${var.region} --project=${var.project_id} --branch=main
+gcloud builds triggers run ${google_cloudbuild_trigger.ingestion_trigger.name} --region=${var.region} --project=${var.project_id} --branch=main
+gcloud builds triggers run ${google_cloudbuild_trigger.workflow_trigger.name} --region=${var.region} --project=${var.project_id} --branch=main
+gcloud builds triggers run ${google_cloudbuild_trigger.import_tool_trigger.name} --region=${var.region} --project=${var.project_id} --branch=main
+EOT
+  }
+
+  depends_on = [
+    google_cloudbuild_trigger.executor_trigger,
+    google_cloudbuild_trigger.ingestion_trigger,
+    google_cloudbuild_trigger.workflow_trigger,
+    google_cloudbuild_trigger.import_tool_trigger
+  ]
+}
+
+# Outputs
+output "executor_trigger_id" {
+  value = google_cloudbuild_trigger.executor_trigger.id
+}
+
+output "workflow_trigger_id" {
+  value = google_cloudbuild_trigger.workflow_trigger.id
+}
+
+output "ingestion_trigger_id" {
+  value = google_cloudbuild_trigger.ingestion_trigger.id
+}
+
+output "import_tool_trigger_id" {
+  value = google_cloudbuild_trigger.import_tool_trigger.id
+}