name: Deploy (manual)

on:
  workflow_dispatch:
    inputs:
      target:
        description: 'Target host (e.g. helsinki-a, london-b, all)'
        required: true
        type: string
      playbook:
        description: 'Ansible playbook to run (e.g. site.yml, update.yml)'
        required: true
        type: string
      dry_run:
        description: 'Dry run (--check mode)'
        required: false
        type: boolean
        default: true

# Requires these repository secrets:
#   TAILSCALE_AUTHKEY  — Tailscale auth key for mesh access
#   SSH_PRIVATE_KEY    — SSH key authorized on target hosts
#   AGE_SECRET_KEY     — age private key for SOPS decryption

jobs:
  deploy:
    name: Deploy to ${{ inputs.target }}
    runs-on: ubuntu-latest
    environment: production  # requires manual approval in repo settings
    steps:
      - uses: actions/checkout@v4

      - name: Set up Tailscale
        uses: tailscale/github-action@v3
        with:
          authkey: ${{ secrets.TAILSCALE_AUTHKEY }}

      - name: Set up SSH key
        run: |
          mkdir -p ~/.ssh
          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/id_ed25519
          chmod 600 ~/.ssh/id_ed25519
          ssh-keyscan -H 100.67.6.27 100.84.65.101 100.122.219.41 100.117.235.28 100.89.206.60 100.115.45.53 >> ~/.ssh/known_hosts 2>/dev/null || true

      - name: Install tools
        run: |
          pip install ansible
          wget -qO /tmp/sops.deb https://github.com/getsops/sops/releases/download/v3.9.4/sops_3.9.4_amd64.deb
          sudo dpkg -i /tmp/sops.deb

      - name: Install Ansible collections
        run: ansible-galaxy install -r ansible/requirements.yml

      - name: Decrypt secrets
        env:
          SOPS_AGE_KEY: ${{ secrets.AGE_SECRET_KEY }}
        run: |
          # Decrypt all .enc. files to their plaintext counterparts
          find . -name '*.enc.yml' -o -name '*.enc.yaml' -o -name '*.enc.env' | while read f; do
            out="${f/.enc/}"
            sops -d "$f" > "$out"
            echo "Decrypted: $f -> $out"
          done

      - name: Run playbook
        working-directory: ansible/
        env:
          ANSIBLE_HOST_KEY_CHECKING: "false"
        run: |
          PLAYBOOK="${{ inputs.playbook }}"
          # Normalize: strip prefix/suffix, then re-add as needed
          PLAYBOOK="${PLAYBOOK#playbooks/}"
          PLAYBOOK="${PLAYBOOK%.yml}.yml"
          if [ "$PLAYBOOK" != "deploy.yml" ]; then
            PLAYBOOK="playbooks/$PLAYBOOK"
          fi

          ARGS=""
          if [ "${{ inputs.target }}" != "all" ]; then
            ARGS="--limit ${{ inputs.target }}"
          fi
          if [ "${{ inputs.dry_run }}" = "true" ]; then
            ARGS="$ARGS --check --diff"
          fi
          ansible-playbook "$PLAYBOOK" $ARGS