version: 2.1

commands:
  restore_cache_cmd:
    description: "Restore cache from a previous workflow"
    steps:
      - restore_cache:
          keys:
            - deps1-{{ .Branch }}-{{ checksum "requirements/dev.txt" }}
            - deps1-{{ .Branch }}-

  save_cache_cmd:
    description: "save cache with workflow new state"
    steps:
      - save_cache:
          key: deps1-{{ .Branch }}-{{ checksum "requirements/dev.txt" }}
          paths:
            - "venv"

executors:
  docker-python-executor:
    docker:
      - image: circleci/python:3.7.9-stretch
        auth:
          username: morganlmd
          password: $DOCKERHUB_PASSWORD
        environment:
          CONDUIT_SECRET: "something-really-secret"
          FLASK_APP: /home/circleci/repo/autoapp.py
          FLASK_DEBUG: 1

  docker-postgres-executor:
    docker:
      - image: circleci/python:3.7.9-stretch
        environment:
          CONDUIT_SECRET: "something-really-secret"
          FLASK_APP: autoapp.py
          FLASK_DEBUG: 1
          DATABASE_URL: postgresql://myUsr:somePwd@localhost:5432/myUsr

      - image: circleci/postgres:9.6.5-alpine
        environment:
          POSTGRES_USER: myUsr
          POSTGRES_DB: myUsr
          POSTGRES_PASSWORD: somePwd

    dockerhub-publisher:
      environment:
        IMAGE_NAME: morganlmd/devops-tp-final-back-docker
        IMAGE_NAME_TMP: app
      docker:
        - image: circleci/buildpack-deps:stretch

jobs:
  initial-build:
    executor: docker-python-executor
    steps:
      - checkout
      - restore_cache_cmd
      - run:
          name: setup environment and install python dependencies in a venv
          command: |
            python3 -m venv venv
            . venv/bin/activate
            pip install -r requirements/dev.txt
      - save_cache_cmd

  setup-and-test-db:
    executor: docker-postgres-executor
    steps:
      - checkout
      - restore_cache_cmd
      - run:
          name: testing connection between database and backend
          command: |
            . venv/bin/activate
            sleep 1
            flask db upgrade
            # flask test
      - save_cache_cmd

  dockerhub-publishing:
    working_directory: /dockerapp
    executor: dockerhub-publisher
    steps:
      - checkout
      - setup_remote_docker
      - run:
          name: Building docker image
          command: |
            docker build --cache-from=app -t app .
      - deploy:
          name: publishing docker image to dockerhub
          command: |
            docker login -e $DOCKERHUB_EMAIL -u $DOCKERHUB_USERNAME -p $DOCKERHUB_PASSWORD
            docker tag $IMAGE_NAME_TMP $IMAGE_NAME:$CIRCLE_BUILD_NUM
            docker tag $IMAGE_NAME_TMP $IMAGE_NAME:latest
            docker push $IMAGE_NAME:$CIRCLE_BUILD_NUM
            docker push $IMAGE_NAME:latest

workflows:
  version: 2
  build-test-back-and-db:
    jobs:
      - initial-build
      - setup-and-test-db:
          requires:
            - initial-build
      - docker-build:
          requires:
            - initial-build
            - setup-and-test-db