# Gitea Actions CI/CD pipeline: lint → test → deploy
# Triggers on push to main branch.
# Required variables and secrets (set in Gitea repo settings):
#   Variables:
#     DEPLOY_HOST      — server IP or hostname
#     DEPLOY_PATH      — absolute path to the directory on the server
#     DEPLOY_USER      — SSH username on the server
#     SSH_KNOWN_HOSTS  — SSH known_host fingerprint for security
#     SSH_PORT         — SSH port of the server
#   Secrets:
#     SSH_PRIVATE_KEY  — SSH private key for deployment
name: Deploy

on:
  push:
    branches: [main]
  workflow_dispatch:
    inputs:
      run_setup_db:
        description: "Run deploy/setup_db.sh to configure DB and run migrations"
        required: false
        type: boolean
        default: false

# Serialize deploys so two quick pushes to main can't rsync/restart on top of
# each other. Don't cancel an in-flight deploy mid-restart.
concurrency:
  group: deploy-main
  cancel-in-progress: false

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: "3.12"
          cache: "pip"
      - run: pip install ruff
      - run: ruff check app/

  test:
    needs: lint
    runs-on: ubuntu-latest
    services:
      postgres:
        image: postgres:16
        env:
          POSTGRES_DB: test_db
          POSTGRES_USER: test_user
          POSTGRES_PASSWORD: test_pass
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: "3.12"
          cache: "pip"
      - uses: actions/setup-node@v4
        with:
          node-version: "20"
          cache: "npm"
          cache-dependency-path: frontend/package-lock.json
      - run: pip install -e ".[dev]"
      # The Postgres service exists only to validate the migrations against real
      # Postgres (what prod runs). The test suite itself uses an in-memory SQLite
      # engine (tests/conftest.py), so pytest doesn't touch this service.
      - run: alembic upgrade head
        env:
          DATABASE_URL: postgresql+asyncpg://test_user:test_pass@postgres:5432/test_db
      - run: pytest --tb=short
      - run: |
          cd frontend
          npm ci
          if node -e "require.resolve('vitest/package.json')" >/dev/null 2>&1; then
            npm test
          else
            echo "vitest not configured; skipping frontend tests"
          fi
          npm run build

  deploy:
    needs: test
    runs-on: ubuntu-latest
    env:
      DEPLOY_HOST: ${{ vars.DEPLOY_HOST }}
      DEPLOY_USER: ${{ vars.DEPLOY_USER }}
      DEPLOY_PATH: ${{ vars.DEPLOY_PATH }}
      SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
      SSH_KNOWN_HOSTS: ${{ vars.SSH_KNOWN_HOSTS }}
      SSH_PORT: ${{ vars.SSH_PORT || '22' }}
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: "20"
          cache: "npm"
          cache-dependency-path: frontend/package-lock.json

      - name: Build frontend
        run: |
          cd frontend
          npm ci
          npm run build

      - name: Install deploy tools
        run: sudo apt-get update -qq && sudo apt-get install -y -qq rsync openssh-client > /dev/null 2>&1 || true

      - name: Set up SSH
        run: |
          mkdir -p ~/.ssh
          chmod 700 ~/.ssh
          echo "$SSH_PRIVATE_KEY" > ~/.ssh/deploy_key
          chmod 600 ~/.ssh/deploy_key
          echo "$SSH_KNOWN_HOSTS" >> ~/.ssh/known_hosts
          # known_hosts is supplied, so verify the host key instead of blindly
          # trusting it (StrictHostKeyChecking=no would defeat the fingerprint).
          echo "SSH_OPTS=-i $HOME/.ssh/deploy_key -o StrictHostKeyChecking=yes -p ${SSH_PORT}" >> "$GITHUB_ENV"

      - name: Sync files to server
        run: |
          rsync -avz --delete \
            --exclude '.git/' \
            --exclude '.gitea/' \
            --exclude '.env' \
            --exclude '.venv/' \
            --exclude '__pycache__/' \
            --exclude '.pytest_cache/' \
            --exclude 'logs/' \
            --exclude '*.pyc' \
            --exclude 'frontend/node_modules/' \
            -e "ssh $SSH_OPTS" \
            ./ "${DEPLOY_USER}@${DEPLOY_HOST}:${DEPLOY_PATH}/"

      - name: Install deps & run migrations
        run: |
          ssh $SSH_OPTS "${DEPLOY_USER}@${DEPLOY_HOST}" << REMOTE_SCRIPT
            set -e
            cd ${DEPLOY_PATH}

            # Create venv if not exists
            if [ ! -d ".venv" ]; then
              python3 -m venv .venv
            fi

            source .venv/bin/activate
            pip install --quiet --upgrade pip
            pip install --quiet -e .

            # Setup DB and run migrations
            if [ "${{ inputs.run_setup_db }}" = "true" ] || [ "${{ github.event.inputs.run_setup_db }}" = "true" ]; then
              chmod +x deploy/setup_db.sh
              ./deploy/setup_db.sh
            else
              alembic upgrade head
            fi
          REMOTE_SCRIPT

      - name: Restart service & health check
        run: |
          ssh $SSH_OPTS "${DEPLOY_USER}@${DEPLOY_HOST}" << REMOTE_SCRIPT
            set -e
            sudo systemctl restart signalplatform.service
            sleep 3
            curl -fsS http://127.0.0.1:8998/api/v1/health > /dev/null \
              || { echo "✗ health check failed after restart"; exit 1; }
            echo "✓ signalplatform deployed"
          REMOTE_SCRIPT

      - name: Clean up SSH key
        if: always()
        run: rm -f ~/.ssh/deploy_key