name: Terraform Deploy to GCP

on:
  push:
    branches:
      - main

jobs:
  terraform:
    name: Deploy with Terraform on GCP
    runs-on: ubuntu-latest
    env:
      GOOGLE_APPLICATION_CREDENTIALS: ${{ github.workspace }}/gcp-key.json

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Set up Terraform
        uses: hashicorp/setup-terraform@v3
        with:
          terraform_version: 1.5.0

      - name: Authenticate to Google Cloud
        run: echo "${{ secrets.GCP_CREDENTIALS }}" > gcp-key.json
        shell: bash

      - name: Terraform Init
        run: terraform init -var="credentials_file=gcp-key.json"

      - name: Terraform Validate
        run: terraform validate

      - name: Terraform Plan
        run: terraform plan -var="credentials_file=gcp-key.json" -out=tfplan

      - name: Terraform Apply
        run: terraform apply -auto-approve tfplan

      - name: Clean up credentials file
        run: rm -f gcp-key.json