name: Deploy

# Deploy on every push to master (and allow manual runs from the Actions tab).
on:
  push:
    branches: [master]
  workflow_dispatch:

# A STABLE compose project name so the named volume (dispatcharr_data) is the
# same on every run. Compose prefixes volumes with the project name; if that
# name changed between runs (e.g. a different checkout path) you'd silently get
# a fresh empty volume and lose Dispatcharr's database/config on each deploy.
env:
  COMPOSE_PROJECT_NAME: livetv

jobs:
  deploy:
    # `docker` label => node:22-bookworm with the host Docker socket available.
    runs-on: docker
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      # The job image has the Docker socket available but may not ship the docker
      # CLI / compose plugin. Install them only if missing (no-op otherwise) so
      # `docker compose ...` can talk to the host daemon.
      - name: Ensure Docker CLI + Compose plugin
        run: |
          if ! command -v docker >/dev/null 2>&1; then
            curl -fsSL https://download.docker.com/linux/static/stable/x86_64/docker-27.3.1.tgz \
              | tar -xz -C /usr/local/bin --strip-components=1 docker/docker
          fi
          if ! docker compose version >/dev/null 2>&1; then
            mkdir -p /usr/local/lib/docker/cli-plugins
            curl -fsSL https://github.com/docker/compose/releases/download/v2.29.7/docker-compose-linux-x86_64 \
              -o /usr/local/lib/docker/cli-plugins/docker-compose
            chmod +x /usr/local/lib/docker/cli-plugins/docker-compose
          fi
          docker version
          docker compose version

      # `proxy` is the shared external network Nginx Proxy Manager sits on.
      # Create it if it doesn't exist yet so `docker compose up` won't fail.
      - name: Ensure 'proxy' network exists
        run: docker network inspect proxy >/dev/null 2>&1 || docker network create proxy

      # Pull the latest images. Large images over a flaky path (e.g. IPv6 to the
      # GHCR CDN) can drop mid-transfer, so retry a few times before giving up.
      - name: Pull images
        run: |
          for i in 1 2 3 4 5; do
            docker compose pull && exit 0
            echo "pull attempt $i failed; retrying in 15s..."
            sleep 15
          done
          echo "pull failed after 5 attempts" >&2
          exit 1

      # Reconcile the stack: compose only recreates services whose config or
      # image actually changed, and cleans up any services removed from the file.
      - name: Deploy stack
        run: docker compose up -d --remove-orphans

      # Free disk on the shared runner by dropping old, untagged images.
      - name: Prune old images
        run: docker image prune -f