name: Destroy

on:
  workflow_dispatch:
    inputs:
      confirm:
        description: 'Type "destroy" to confirm'
        required: true
        default: ''

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 }}
  TF_VAR_s3_endpoint: ${{ secrets.S3_ENDPOINT }}
  TF_VAR_s3_bucket: ${{ secrets.S3_BUCKET }}
  TF_VAR_tailscale_tailnet: ${{ secrets.TAILSCALE_TAILNET }}

jobs:
  destroy:
    name: Destroy Cluster
    runs-on: ubuntu-latest
    if: github.event.inputs.confirm == 'destroy'
    environment: destroy
    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 }}" \
            -backend-config="skip_requesting_account_id=true"

      - name: Setup SSH Keys
        run: |
          mkdir -p ~/.ssh
          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/id_ed25519
          chmod 600 ~/.ssh/id_ed25519
          echo "${{ secrets.SSH_PUBLIC_KEY }}" > ~/.ssh/id_ed25519.pub
          chmod 644 ~/.ssh/id_ed25519.pub

      - name: Install jq
        run: |
          apt-get update
          apt-get install -y jq

      - name: Terraform Destroy
        id: destroy
        working-directory: terraform
        run: |
          set +e
          for attempt in 1 2 3; do
            echo "Terraform destroy attempt ${attempt}/3"
            terraform destroy \
              -var="hcloud_token=${{ secrets.HCLOUD_TOKEN }}" \
              -var="ssh_public_key=$HOME/.ssh/id_ed25519.pub" \
              -var="ssh_private_key=$HOME/.ssh/id_ed25519" \
              -auto-approve
            rc=$?
            if [ "$rc" -eq 0 ]; then
              exit 0
            fi
            if [ "$attempt" -lt 3 ]; then
              echo "Terraform destroy failed with exit code ${rc}; retrying in 30s"
              sleep 30
              terraform refresh \
                -var="hcloud_token=${{ secrets.HCLOUD_TOKEN }}" \
                -var="ssh_public_key=$HOME/.ssh/id_ed25519.pub" \
                -var="ssh_private_key=$HOME/.ssh/id_ed25519" || true
            fi
          done
          exit "$rc"

      - name: Hetzner destroy diagnostics
        if: failure() && steps.destroy.outcome == 'failure'
        env:
          HCLOUD_TOKEN: ${{ secrets.HCLOUD_TOKEN }}
        run: |
          set +e
          echo "== Terraform state list =="
          terraform -chdir=terraform state list || true

          network_id=$(terraform -chdir=terraform state show hcloud_network.cluster 2>/dev/null | awk '/^id *=/ {gsub(/"/, "", $3); print $3; exit}')
          if [ -z "$network_id" ]; then
            network_id="11988935"
          fi

          echo "== Hetzner network =="
          curl -fsSL -H "Authorization: Bearer ${HCLOUD_TOKEN}" "https://api.hetzner.cloud/v1/networks/${network_id}" | jq . || true

          echo "== Hetzner servers attached to network =="
          curl -fsSL -H "Authorization: Bearer ${HCLOUD_TOKEN}" "https://api.hetzner.cloud/v1/servers" | jq --argjson id "$network_id" '.servers[] | select(any(.private_net[]?; .network == $id)) | {id, name, private_net}' || true

          echo "== Hetzner load balancers attached to network =="
          curl -fsSL -H "Authorization: Bearer ${HCLOUD_TOKEN}" "https://api.hetzner.cloud/v1/load_balancers" | jq --argjson id "$network_id" '.load_balancers[] | select(any(.private_net[]?; .network == $id)) | {id, name, private_net}' || true