name: Zcashd Manual Deploy

on:
  workflow_dispatch:
    inputs:
      network:
        default: 'Mainnet'
        description: 'Network to deploy: Mainnet or Testnet'
        required: true
      size:
        default: '10'
        description: 'GCP Managed Instance Group size'
        required: true

env:
  PROJECT_ID: zealous-zebra
  REGION: us-central1
  ZONE: us-central1-a
  MACHINE_TYPE: c2-standard-4

jobs:
  deploy:
    name: Deploy zcashd nodes
    runs-on: ubuntu-latest
    timeout-minutes: 30
    permissions:
      contents: 'read'
      id-token: 'write'

    steps:
      - uses: actions/checkout@v3.0.2
        with:
          persist-credentials: false

      - name: Inject slug/short variables
        uses: rlespinasse/github-slug-action@v4
        with:
          short-length: 7

      # Setup gcloud CLI
      - name: Authenticate to Google Cloud
        id: auth
        uses: google-github-actions/auth@v0.8.0
        with:
          workload_identity_provider: 'projects/143793276228/locations/global/workloadIdentityPools/github-actions/providers/github-oidc'
          service_account: 'github-service-account@zealous-zebra.iam.gserviceaccount.com'
          token_format: 'access_token'

      # Create instance template from container image
      - name: Create instance template
        run: |
          gcloud compute instance-templates create-with-container zcashd-${{ env.GITHUB_REF_SLUG_URL }}-${{ env.GITHUB_SHA_SHORT }} \
          --boot-disk-size 10GB \
          --boot-disk-type=pd-ssd \
          --container-stdin \
          --container-tty \
          --container-image electriccoinco/zcashd \
          --container-env ZCASHD_NETWORK="${{ github.event.inputs.network }}" \
          --machine-type ${{ env.MACHINE_TYPE }} \
          --service-account ${{ env.DEPLOY_SA }} \
          --scopes cloud-platform \
          --tags zcashd

      # Check if our destination instance group exists already
      - name: Check if instance group exists
        id: does-group-exist
        continue-on-error: true
        run: |
          gcloud compute instance-groups list | grep "zcashd-${{ env.GITHUB_REF_SLUG_URL }}-${{ github.event.inputs.network }}" | grep "${{ env.REGION }}"

      # Deploy new managed instance group using the new instance template
      - name: Create managed instance group
        if: steps.does-group-exist.outcome == 'failure'
        run: |
          gcloud compute instance-groups managed create \
          "zcashd-${{ env.GITHUB_REF_SLUG_URL }}-${{ github.event.inputs.network }}" \
          --template "zcashd-${{ env.GITHUB_REF_SLUG_URL }}-${{ env.GITHUB_SHA_SHORT }}" \
          --region "${{ env.REGION }}" \
          --size "${{ github.event.inputs.size }}"

      # Rolls out update to existing group using the new instance template
      - name: Update managed instance group
        if: steps.does-group-exist.outcome == 'success'
        run: |
          gcloud compute instance-groups managed rolling-action start-update \
          "zcashd-${{ env.GITHUB_REF_SLUG_URL }}-${{ github.event.inputs.network }}" \
          --version template="zcashd-${{ env.GITHUB_REF_SLUG_URL }}-${{ env.GITHUB_SHA_SHORT }}" \
          --region "${{ env.REGION }}"