# Gitea Actions. While .gitea/workflows exists Gitea ignores .github/workflows (GitHub Pages only).
#
# Every push and pull request: install, test and build.
# Push to main: build the Docker image, push it to the Gitea registry, then start it with
# docker compose through the runner's Docker socket (the runner lives on the deployment server).
#
# Repository settings → Actions → Secrets:
#   REGISTRY_USERNAME    Gitea user that publishes images
#   REGISTRY_TOKEN       its personal access token with package Read and Write
#                        (the built-in GITEA_TOKEN cannot publish packages)
# Repository settings → Actions → Variables (optional):
#   NPM_REGISTRY         npm mirror used by the runner and the server's Docker build when
#                        registry.npmjs.org is unreachable, e.g. from servers in Iran
#   HEALTH_URL           URL checked after deploy, e.g. https://robotmarkets.ir/
name: CI/CD

on:
  push:
    branches: [main]
  pull_request:
  workflow_dispatch:

# Deploys run one at a time, in push order.
concurrency:
  group: ci-cd-${{ github.ref }}
  cancel-in-progress: false

# Fail within minutes instead of hanging when the registry is slow or blocked.
env:
  NPM_CONFIG_REGISTRY: ${{ vars.NPM_REGISTRY || 'https://registry.npmjs.org/' }}
  NPM_CONFIG_FETCH_RETRIES: '3'
  NPM_CONFIG_FETCH_TIMEOUT: '60000'

jobs:
  test:
    runs-on: ubuntu-latest
    timeout-minutes: 15
    container:
      image: node:22-bookworm
    steps:
      - uses: actions/checkout@v4
      - name: Install
        run: npm ci --no-audit --no-fund
      - name: Check formatting
        run: npm run format:check
      - name: Lint
        run: npm run lint
      - name: Test
        run: npm test
      - name: Build
        run: npm run build

  publish:
    needs: test
    if: github.event_name != 'pull_request' && github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    timeout-minutes: 30
    outputs:
      image: ${{ steps.push.outputs.image }}
    steps:
      - uses: actions/checkout@v4
      - name: Build, push and link the image
        id: push
        shell: bash
        env:
          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
          REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
          SOURCE_REPOSITORY: ${{ gitea.repository }}
          COMMIT_SHA: ${{ gitea.sha }}
          RUN_ID: ${{ gitea.run_id }}
        run: |
          set -euo pipefail
          REGISTRY='git.my-rm.com'
          OWNER="${SOURCE_REPOSITORY%%/*}"
          REPO="${SOURCE_REPOSITORY#*/}"
          IMAGE="$REGISTRY/${OWNER,,}/${REPO,,}:build-$(date -u +%Y%m%d-%H%M%S)-${RUN_ID}-${COMMIT_SHA:0:7}"

          # Keep this job's registry credentials away from the host's own logins.
          DOCKER_CONFIG="$(mktemp -d)"
          export DOCKER_CONFIG
          trap 'rm -rf "$DOCKER_CONFIG"' EXIT

          printf '%s' "$REGISTRY_TOKEN" | docker login "$REGISTRY" --username "$REGISTRY_USERNAME" --password-stdin
          docker build \
            --build-arg "NPM_REGISTRY=$NPM_CONFIG_REGISTRY" \
            --label "org.opencontainers.image.source=https://$REGISTRY/$SOURCE_REPOSITORY" \
            --label "org.opencontainers.image.revision=$COMMIT_SHA" \
            --tag "$IMAGE" .
          docker push "$IMAGE"

          # Show the package under this repository's Packages tab. Gitea answers 400 when the package
          # is already linked (every run after the first), and the image is published either way.
          status="$(curl --silent --show-error --output /dev/null --write-out '%{http_code}' --request POST \
            --header "Authorization: token $REGISTRY_TOKEN" \
            "https://$REGISTRY/api/v1/packages/$OWNER/container/${REPO,,}/-/link/$REPO")"
          case "$status" in
            201) echo "Linked the package to $REPO" ;;
            *) echo "Package link request returned HTTP $status (already linked is normal); continuing" ;;
          esac

          echo "image=$IMAGE" >> "$GITEA_OUTPUT"
          echo "Published and linked: $IMAGE"

  # The runner shares the server's Docker daemon, so deploying is a local docker compose call:
  # no SSH, and the daemon pulls with the credentials of this job's temporary docker login.
  deploy:
    needs: publish
    runs-on: ubuntu-latest
    timeout-minutes: 15
    steps:
      - uses: actions/checkout@v4
      - name: Deploy the published image
        shell: bash
        env:
          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
          REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
          IMAGE: ${{ needs.publish.outputs.image }}
        run: |
          set -euo pipefail
          DOCKER_CONFIG="$(mktemp -d)"
          export DOCKER_CONFIG
          trap 'rm -rf "$DOCKER_CONFIG"' EXIT

          printf '%s' "$REGISTRY_TOKEN" | docker login git.my-rm.com --username "$REGISTRY_USERNAME" --password-stdin
          docker compose -p vending-machine-game -f deploy/docker-compose.yml pull
          docker compose -p vending-machine-game -f deploy/docker-compose.yml up -d --remove-orphans
          docker compose -p vending-machine-game -f deploy/docker-compose.yml ps
          docker image prune -f

      - name: Check the site
        if: vars.HEALTH_URL != ''
        shell: bash
        env:
          HEALTH_URL: ${{ vars.HEALTH_URL }}
        run: |
          for attempt in $(seq 1 20); do
            if curl -fsS -o /dev/null "$HEALTH_URL"; then
              echo "Site is up: $HEALTH_URL"
              exit 0
            fi
            sleep 6
          done
          echo "Site did not answer at $HEALTH_URL" >&2
          exit 1