# Copyright 2022 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
#
#      http://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
# requestations under the License.

---
resources:
  - type: bigquery_table
    table_id: versions
    description:

dag:
  airflow_version: 2
  initialize:
    dag_id: versions
    default_args:
      owner: "Google"
      depends_on_past: False
      start_date: "2022-11-15"
    max_active_runs: 1
    schedule_interval: "@daily"
    catchup: False
    default_view: graph

  tasks:
    - operator: "BashOperator"
      description: "Fetch data gcs - gcs"
      args:
        task_id: "bash_gcs_to_gcs"
        bash_command: |
          if test -f /home/airflow/gcs/data/libraries_io/lib-1.6.0.tar.gz;
          then
              mkdir /home/airflow/gcs/data/libraries_io/versions/
              cp /home/airflow/gcs/data/libraries_io/libraries-1.4.0-2018-12-22/versions-1.4.0-2018-12-22.csv /home/airflow/gcs/data/libraries_io/versions/versions.csv
          else
              mkdir /home/airflow/gcs/data/libraries_io/
              curl -o /home/airflow/gcs/data/libraries_io/lib-1.6.0.tar.gz -L https://zenodo.org/record/2536573/files/Libraries.io-open-data-1.4.0.tar.gz
              tar -xf /home/airflow/gcs/data/libraries_io/lib-1.6.0.tar.gz -C /home/airflow/gcs/data/libraries_io/
              mkdir /home/airflow/gcs/data/libraries_io/versions/
              cp /home/airflow/gcs/data/libraries_io/libraries-1.4.0-2018-12-22/versions-1.4.0-2018-12-22.csv /home/airflow/gcs/data/libraries_io/versions/versions.csv
          fi

    - operator: "GKECreateClusterOperator"
      args:
        task_id: "create_cluster"
        project_id: "{{ var.value.gcp_project }}"
        location: "us-central1-c"
        body:
          name: pdp-libraries-io-versions
          initial_node_count: 1
          network: "{{ var.value.vpc_network }}"
          node_config:
            machine_type: e2-standard-16
            oauth_scopes:
              - https://www.googleapis.com/auth/devstorage.read_write
              - https://www.googleapis.com/auth/cloud-platform

    - operator: "GKEStartPodOperator"
      description: "Run CSV transform within kubernetes pod"
      args:
        task_id: "transform_versions"
        startup_timeout_seconds: 600
        name: "versions"
        namespace: "default"
        project_id: "{{ var.value.gcp_project }}"
        location: "us-central1-c"
        cluster_name: pdp-libraries-io-versions
        image_pull_policy: "Always"
        image: "{{ var.json.libraries_io.container_registry.run_csv_transform_kub }}"
        env_vars:
          SOURCE_GCS_BUCKET: "{{ var.value.composer_bucket }}"
          SOURCE_GCS_OBJECT: "data/libraries_io/versions/versions.csv"
          SOURCE_FILE: "files/versions.csv"
          TARGET_FILE: "files/data_versions.csv"
          TARGET_GCS_BUCKET: "{{ var.value.composer_bucket }}"
          TARGET_GCS_PATH: "data/libraries_io/versions/data_versions.csv"
          CHUNKSIZE: "100000"
          PIPELINE_NAME: "versions"
          RENAME_MAPPINGS: >-
            {"ID":"id","Platform":"platform","Project Name":"project_name","Project ID":"project_id","Number":"number",
            "Published Timestamp":"published_timestamp","Created Timestamp":"created_timestamp","Updated Timestamp":"updated_timestamp"}
          CSV_HEADERS: >-
            ["id","platform","project_name","project_id","number","published_timestamp","created_timestamp","updated_timestamp"]
        container_resources:
          memory:
            request: "16Gi"
          cpu:
            request: "1"
          ephemeral-storage:
            request: "10Gi"

    - operator: "GoogleCloudStorageToBigQueryOperator"
      description: "Task to load CSV data to a BigQuery table"
      args:
        task_id: "load_versions_to_bq"
        bucket: "{{ var.value.composer_bucket }}"
        source_objects: ["data/libraries_io/versions/data_versions.csv"]
        source_format: "CSV"
        destination_project_dataset_table: "libraries_io.versions"
        skip_leading_rows: 2
        allow_quoted_newlines: True
        write_disposition: "WRITE_TRUNCATE"
        schema_fields:
          - name: "id"
            type: "integer"
            description: "The unique primary key of the version in the Libraries.io database."
            mode: "nullable"
          - name: "platform"
            type: "string"
            description: "The name of the Package manager the version is available on."
            mode: "nullable"
          - name: "project_name"
            type: "string"
            description: "The name of the project the version belongs to."
            mode: "nullable"
          - name: "project_id"
            type: "integer"
            description: "The unique primary key of the project for this version in the Libraries.io database."
            mode: "nullable"
          - name: "number"
            type: "string"
            description: "The number of the release often confirms to semantic versioning."
            mode: "nullable"
          - name: "published_timestamp"
            type: "timestamp"
            description: "The timestamp of when the version was published."
            mode: "nullable"
          - name: "created_timestamp"
            type: "timestamp"
            description: "The timestamp of when the version was first detected by Libraries.io."
            mode: "nullable"
          - name: "updated_timestamp"
            type: "timestamp"
            description: "The timestamp of when the version was last saved by Libraries.io."
            mode: "nullable"

    - operator: "GKEDeleteClusterOperator"
      args:
        task_id: "delete_cluster"
        project_id: "{{ var.value.gcp_project }}"
        location: "us-central1-c"
        name: pdp-libraries-io-versions

  graph_paths:
    - "bash_gcs_to_gcs >> create_cluster >> transform_versions >> delete_cluster >> load_versions_to_bq"
