name: Deploy infrastructure

on:
  push:
    branches:
      - "**"

jobs:
  determine_stage:
    runs-on: ubuntu-latest
    outputs:
      stage: ${{ steps.set-stage.outputs.stage }}

    steps:
      - name: Determine stage from branch
        id: set-stage
        shell: bash
        run: |
          BRANCH="${GITHUB_REF_NAME}"

          if [[ "$BRANCH" == "prod" ]]; then
            echo "stage=prod" >> "$GITHUB_OUTPUT"

          elif [[ "$BRANCH" == "dev" ]]; then
            echo "stage=dev" >> "$GITHUB_OUTPUT"

          else
            echo "stage=dev" >> "$GITHUB_OUTPUT"
          fi

  # ============================================================
  # 1️⃣ Shared Terraform (infra)
  # ============================================================
  shared_terraform:
    needs: determine_stage
    runs-on: ubuntu-latest
    env:
      STAGE: ${{ needs.determine_stage.outputs.stage }}

    steps:
      - uses: actions/checkout@v4

      - uses: aws-actions/configure-aws-credentials@v4
        with:
          aws-access-key-id: ${{ secrets.DEV_AWS_ACCESS_KEY_ID }}
          aws-secret-access-key: ${{ secrets.DEV_AWS_SECRET_ACCESS_KEY }}
          aws-region: ${{ secrets.DEV_AWS_REGION }}

      - uses: hashicorp/setup-terraform@v3

      - name: Terraform Init
        working-directory: infrastructure/terraform/shared
        run: terraform init -reconfigure

      - name: Terraform Workspace
        working-directory: infrastructure/terraform/shared
        run: terraform workspace select ${STAGE} || terraform workspace new ${STAGE}

      - name: Terraform Plan
        working-directory: infrastructure/terraform/shared
        run: terraform plan -var-file=${STAGE}.tfvars -out=tfplan

      - name: Terraform Apply
        if: env.STAGE == 'prod'
        working-directory: infrastructure/terraform/shared
        run: terraform apply -auto-approve tfplan

  # ============================================================
  # 2️⃣ Build Address 2 UPRN image and Push
  # ============================================================
  address2uprn_image:
    needs: [determine_stage, shared_terraform]
    uses: ./.github/workflows/_build_image.yml
    with:
      ecr_repo: address2uprn-${{ needs.determine_stage.outputs.stage }}
      dockerfile_path: backend/address2UPRN/handler/Dockerfile
      build_context: .
    secrets:
      AWS_ACCESS_KEY_ID: ${{ secrets.DEV_AWS_ACCESS_KEY_ID }}
      AWS_SECRET_ACCESS_KEY: ${{ secrets.DEV_AWS_SECRET_ACCESS_KEY }}
      AWS_REGION: ${{ secrets.DEV_AWS_REGION }}

  # ============================================================
  # 3️⃣ Deploy Address 2 UPRN Lambda
  # ============================================================
  address2uprn_lambda:
    needs: [address2uprn_image, determine_stage]
    uses: ./.github/workflows/_deploy_lambda.yml
    with:
      lambda_name: address2uprn
      lambda_path: infrastructure/terraform/lambda/address2UPRN
      stage: ${{ needs.determine_stage.outputs.stage }}
      ecr_repo: address2uprn-${{ needs.determine_stage.outputs.stage }}
      image_digest: ${{ needs.address2uprn_image.outputs.image_digest }}
    secrets:
      AWS_ACCESS_KEY_ID: ${{ secrets.DEV_AWS_ACCESS_KEY_ID }}
      AWS_SECRET_ACCESS_KEY: ${{ secrets.DEV_AWS_SECRET_ACCESS_KEY }}
      AWS_REGION: ${{ secrets.DEV_AWS_REGION }}