# Copyright 2019 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

###############################################################################
#                        Terraform top-level resources                        #
###############################################################################

# Terraform project

module "tf-project" {
  source          = "../../modules/project"
  name            = "terraform"
  parent          = var.root_node
  prefix          = var.prefix
  billing_account = var.billing_account_id
  iam_additive_bindings = {
    for name in var.iam_terraform_owners : (name) => ["roles/owner"]
  }
  services = var.project_services
}

# per-environment service accounts

module "tf-service-accounts" {
  source     = "../../modules/iam-service-accounts"
  project_id = module.tf-project.project_id
  names      = var.environments
  prefix     = var.prefix
  iam_billing_roles = {
    (var.billing_account_id) = (
      var.iam_billing_config.grant ? local.sa_billing_account_role : []
    )
  }
  # folder roles are set in the folders module using authoritative bindings
  iam_organization_roles = {
    (local.organization_id) = concat(
      var.iam_billing_config.grant ? local.sa_billing_org_role : [],
      var.iam_xpn_config.grant ? local.sa_xpn_org_roles : []
    )
  }
  generate_keys = var.service_account_keys
}

# bootstrap Terraform state GCS bucket

module "tf-gcs-bootstrap" {
  source     = "../../modules/gcs"
  project_id = module.tf-project.project_id
  names      = ["tf-bootstrap"]
  prefix     = "${var.prefix}-tf"
  location   = var.gcs_location
}

# per-environment Terraform state GCS buckets

module "tf-gcs-environments" {
  source     = "../../modules/gcs"
  project_id = module.tf-project.project_id
  names      = var.environments
  prefix     = "${var.prefix}-tf"
  location   = var.gcs_location
  iam_roles = {
    for name in var.environments : (name) => ["roles/storage.objectAdmin"]
  }
  iam_members = {
    for name in var.environments : (name) => {
      "roles/storage.objectAdmin" = [module.tf-service-accounts.iam_emails[name]]
    }
  }
}

###############################################################################
#                              Top-level folders                              #
###############################################################################

module "environment-folders" {
  source = "../../modules/folders"
  parent = var.root_node
  names  = var.environments
  iam_roles = {
    for name in var.environments : (name) => local.folder_roles
  }
  iam_members = {
    for name in var.environments : (name) => {
      for role in local.folder_roles :
      (role) => [module.tf-service-accounts.iam_emails[name]]
    }
  }
}

###############################################################################
#                              Audit log exports                              #
###############################################################################

# audit logs project

module "audit-project" {
  source          = "../../modules/project"
  name            = "audit"
  parent          = var.root_node
  prefix          = var.prefix
  billing_account = var.billing_account_id
  iam_members = {
    "roles/bigquery.dataEditor" = [module.audit-log-sinks.writer_identities[0]]
    "roles/viewer"              = var.iam_audit_viewers
  }
  iam_roles = [
    "roles/bigquery.dataEditor",
    "roles/viewer"
  ]
  services = concat(var.project_services, [
    "bigquery.googleapis.com",
  ])
}

# audit logs dataset and sink

module "audit-dataset" {
  source        = "../../modules/bigquery-dataset"
  project_id    = module.audit-project.project_id
  id            = "audit_export"
  friendly_name = "Audit logs export."
  # disable delete on destroy for actual use
  options = {
    default_table_expiration_ms     = null
    default_partition_expiration_ms = null
    delete_contents_on_destroy      = true
  }
}

module "audit-log-sinks" {
  source = "../../modules/logging-sinks"
  parent = var.root_node
  destinations = {
    audit-logs = "bigquery.googleapis.com/${module.audit-dataset.id}"
  }
  sinks = {
    audit-logs = var.audit_filter
  }
}

###############################################################################
#                    Shared resources (GCR, GCS, KMS, etc.)                   #
###############################################################################

# shared resources project
# see the README file for additional options on managing shared services

module "sharedsvc-project" {
  source          = "../../modules/project"
  name            = "sharedsvc"
  parent          = var.root_node
  prefix          = var.prefix
  billing_account = var.billing_account_id
  iam_additive_bindings = {
    for name in var.iam_shared_owners : (name) => ["roles/owner"]
  }
  services = var.project_services
}

# Add further modules here for resources that are common to all environments
# like GCS buckets (used to hold shared assets), Container Registry, KMS, etc.