name: Terraform

on:
  push:
    branches:
      - main
    paths:
      - 'terraform/**'
      - '.gitea/workflows/terraform.yml'
  pull_request:
    branches:
      - main
    paths:
      - 'terraform/**'
      - '.gitea/workflows/terraform.yml'

env:
  TF_VERSION: "1.7.0"
  TF_VAR_hcloud_token: ${{ secrets.HCLOUD_TOKEN }}
  TF_VAR_s3_access_key: ${{ secrets.S3_ACCESS_KEY }}
  TF_VAR_s3_secret_key: ${{ secrets.S3_SECRET_KEY }}

jobs:
  validate:
    name: Validate
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v3
        with:
          terraform_version: ${{ env.TF_VERSION }}

      - name: Terraform Format Check
        working-directory: terraform
        run: terraform fmt -check -recursive

      - name: Terraform Init
        working-directory: terraform
        run: |
          terraform init \
            -backend-config="endpoint=${{ secrets.S3_ENDPOINT }}" \
            -backend-config="bucket=${{ secrets.S3_BUCKET }}" \
            -backend-config="region=auto" \
            -backend-config="access_key=${{ secrets.S3_ACCESS_KEY }}" \
            -backend-config="secret_key=${{ secrets.S3_SECRET_KEY }}"

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

  plan:
    name: Plan
    runs-on: ubuntu-latest
    needs: validate
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v3
        with:
          terraform_version: ${{ env.TF_VERSION }}

      - name: Terraform Init
        working-directory: terraform
        run: |
          terraform init \
            -backend-config="endpoint=${{ secrets.S3_ENDPOINT }}" \
            -backend-config="bucket=${{ secrets.S3_BUCKET }}" \
            -backend-config="region=auto" \
            -backend-config="access_key=${{ secrets.S3_ACCESS_KEY }}" \
            -backend-config="secret_key=${{ secrets.S3_SECRET_KEY }}"

      - name: Terraform Plan
        id: plan
        working-directory: terraform
        run: |
          terraform plan \
            -var="ssh_public_key=${{ secrets.SSH_PUBLIC_KEY }}" \
            -var="ssh_private_key=${{ secrets.SSH_PRIVATE_KEY }}" \
            -out=tfplan \
            -no-color
        continue-on-error: true

      - name: Post Plan to PR
        if: github.event_name == 'pull_request'
        uses: actions/github-script@v7
        with:
          script: |
            const output = `#### Terraform Plan
            \`\`\`
            ${{ steps.plan.outputs.stdout }}
            \`\`\``;
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: output
            });

      - name: Fail if plan failed
        if: steps.plan.outcome == 'failure'
        run: exit 1

  apply:
    name: Apply
    runs-on: ubuntu-latest
    needs: plan
    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
    environment: production
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v3
        with:
          terraform_version: ${{ env.TF_VERSION }}

      - name: Terraform Init
        working-directory: terraform
        run: |
          terraform init \
            -backend-config="endpoint=${{ secrets.S3_ENDPOINT }}" \
            -backend-config="bucket=${{ secrets.S3_BUCKET }}" \
            -backend-config="region=auto" \
            -backend-config="access_key=${{ secrets.S3_ACCESS_KEY }}" \
            -backend-config="secret_key=${{ secrets.S3_SECRET_KEY }}"

      - name: Terraform Apply
        working-directory: terraform
        run: |
          terraform apply \
            -var="ssh_public_key=${{ secrets.SSH_PUBLIC_KEY }}" \
            -var="ssh_private_key=${{ secrets.SSH_PRIVATE_KEY }}" \
            -auto-approve

      - name: Save Terraform Outputs
        working-directory: terraform
        run: terraform output -json > ../outputs/terraform_outputs.json

      - name: Upload Outputs
        uses: actions/upload-artifact@v4
        with:
          name: terraform-outputs
          path: outputs/terraform_outputs.json