# To-Do: Make test case and add it the workflow pipeline
name: Chatbot server CI

# Only trigger the workflow in the case of a version tag pushed 
on:
  push:
    tags:
      - "v*.*.*"
  #   branches:
  #     - 'rasa'
  # pull_request:
  #   branches:
  #     - 'rasa'

  # Workflow can be run manually with REST API and 'ref' as request body parameters.
  # The reference should be tag name,
  # Reference: https://docs.github.com/en/rest/reference/actions#create-a-workflow-dispatch-event
  workflow_dispatch:

  
jobs:
  build:
    name: Push chatbot server Docker image to Docker Hub
    # Builds run on latest Ubuntu instance
    runs-on: ubuntu-latest

    steps:
      # Checks-out repository under $GITHUB_WORKSPACE, so the job can access it
      # We don't use 're: rasa' in this step, refs should be the tags 
      - name: Check Out Repo 
        uses: actions/checkout@v2

      # Build a cache, to reduce build time and number of pulls to the DockerHub
      # Reference: https://docs.docker.com/ci-cd/github-actions/#optimizing-the-workflow
      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      # Loging to the DockerHub with docker username and access token stored in Github
      - name: Login to DockerHub
        # Run this step only if event is tag pushing
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}

      # Store docker tags (ref tag) and labels
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: |
            medbot/nabot_chatbot
          tags: |
            type=schedule
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha

      # Use BuildKit as a Builder
      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1
        
      # Store the github repository tag
      - uses: actions/checkout@v2
      - name: Set output
        id: vars
        run: echo ::set-output name=tag::${GITHUB_REF#refs/*/}

      # Build and push image
      - name: Build and push action server
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          context: ./production/rasa-server
          file: ./production/rasa-server/Dockerfile
          build-args: ${{ steps.vars.outputs.tag }}
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

      # Give the digest of Docker image
      - name: Chabot server image digest
        run: echo ${{ steps.docker_build.outputs.digest }}