books/.github/workflows/deploy-frontend.yml

name: Deploy Frontend to Prod

on:
  workflow_dispatch:
    inputs:
      frontend_image:
        description: "Frontend image tag (full image reference)"
        required: false
      apply:
        description: "Apply changes after plan"
        required: false
        default: "true"
  workflow_run:
    workflows: [ "Frontend CD" ]
    types: [ completed ]

jobs:
  terraform-plan:
    if: ${{ github.event_name != 'workflow_run' || github.event.workflow_run.conclusion == 'success' }}
    runs-on: easynode-debian
    outputs:
      no_changes: ${{ steps.check-changes.outputs.no_changes }}
    permissions:
      contents: read
    env:
      CONVEX_URL: ""
      CLERK_PUBLISHABLE_KEY: ""
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v3

      - name: Setup kubectl
        uses: azure/setup-kubectl@v4

      - name: Setup Doppler CLI
        uses: dopplerhq/cli-action@v4

      - name: Setup Kubeconfig
        env:
          DOPPLER_TOKEN: ${{ secrets.DOPPLER_AT_SECRETS }}
        run: |
          mkdir -p ~/.kube
          doppler run --config prd_secrets -- bash -c 'echo "$KUBECONFIG_DATA" | base64 -d > ~/.kube/config'
          chmod 600 ~/.kube/config 

      - name: Validate cluster access
        run: |
          kubectl cluster-info
          kubectl get namespace books

      - name: Determine deployment values
        id: deploy-vars
        run: |
          frontend_image="${{ github.event.inputs.frontend_image }}"

          latest_frontend_tag="$(git tag --list 'v*' | sort -V | tail -n1)"
          echo "latest frontend tag=$latest_frontend_tag"
          
          if [ -z "$frontend_image" ]; then
            frontend_image="docker.io/rmcampos/books:$latest_frontend_tag"
          fi

          echo "Resolved frontend_image=$frontend_image"

          echo "frontend_image=$frontend_image" >> "$GITHUB_OUTPUT"

      - name: Terraform Fmt -check -diff
        working-directory: terraform
        run: terraform fmt -check -diff

      - name: Terraform Init
        working-directory: terraform
        env:
          DOPPLER_TOKEN: ${{ secrets.DOPPLER_AT_SECRETS }}
        run: doppler run --config prd_secrets -- terraform init -input=false 

      - name: Terraform Validate
        working-directory: terraform
        run: terraform validate

      - name: Fetch public tokens
        env:
          DOPPLER_TOKEN: ${{ secrets.DOPPLER_AT_TOKENS }}
        run: |
          doppler secrets download --no-file --format env \
            --config prd_tokens | sed 's/"//g' >> $GITHUB_ENV

      - name: Terraform Plan
        id: check-changes
        working-directory: terraform
        env:
          DOPPLER_TOKEN: ${{ secrets.DOPPLER_AT_SECRETS }}
        run: |
          doppler run --config prd_secrets -- \
            timeout 1m terraform plan -input=false -out=tfplan \
            -var="convex_url=${{ env.CONVEX_URL }}" \
            -var="clerk_publishable_key=${{ env.CLERK_PUBLISHABLE_KEY }}" \
            -var="frontend_image=${{ steps.deploy-vars.outputs.frontend_image }}"
          terraform show -json tfplan > tfplan.json
          if jq -e '.resource_changes | length == 0' tfplan.json >/dev/null; then
            echo "no_changes=true" >> "$GITHUB_OUTPUT"
            echo "No changes to apply."
            exit 0
          else
            echo "Changes detected. Proceeding with apply"
            echo "no_changes=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Upload plan artifact
        uses: actions/upload-artifact@v3
        with:
          name: tfplan
          path: terraform/tfplan

  terraform-apply:
    runs-on: easynode-debian
    needs: terraform-plan
    if: >
      (github.event_name == 'push' || github.event_name == 'workflow_run' || inputs.apply == 'true')
      && needs.terraform-plan.outputs.no_changes == 'false'
    environment:
      name: production
      url: https://books.darkroasted.vps-kinghost.net
    permissions:
      contents: read
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v3

      - name: Download plan artifact
        uses: actions/download-artifact@v3
        with:
          name: tfplan
          path: terraform

      - name: Setup Doppler CLI
        uses: dopplerhq/cli-action@v4

      - name: Setup Kubeconfig
        env:
          DOPPLER_TOKEN: ${{ secrets.DOPPLER_AT_SECRETS }}
        run: |
          mkdir -p ~/.kube
          doppler run --config prd_secrets -- bash -c 'echo "$KUBECONFIG_DATA" | base64 -d > ~/.kube/config'
          chmod 600 ~/.kube/config 

      - name: Terraform Init
        working-directory: terraform
        env:
          DOPPLER_TOKEN: ${{ secrets.DOPPLER_AT_SECRETS }}
        run: doppler run --config prd_secrets -- terraform init -input=false

      - name: Terraform Apply
        working-directory: terraform
        env:
          DOPPLER_TOKEN: ${{ secrets.DOPPLER_AT_SECRETS }}
        run: doppler run --config prd_secrets -- timeout 1m terraform apply tfplan