name: CI

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

jobs:
  ci:
    name: build + unit + e2e
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      # Full-dind runner: job containers already reach the runner's own docker daemon
      # (pre-set DOCKER_HOST and/or a mounted /var/run/docker.sock) — no dind service.
      # Find a working endpoint and export it as DOCKER_HOST for all later steps.
      - name: Resolve docker daemon
        run: |
          set -u

          # 1) A pre-set DOCKER_HOST that answers is used as-is, no probing.
          if [ -n "${DOCKER_HOST:-}" ]; then
            i=0
            while [ "$i" -lt 5 ]; do
              if docker version --format '{{.Server.Version}}' >/dev/null 2>&1; then
                echo "using pre-set DOCKER_HOST=$DOCKER_HOST"
                echo "DOCKER_HOST=$DOCKER_HOST" >> "$GITHUB_ENV"
                exit 0
              fi
              i=$((i+1)); sleep 2
            done
          fi

          # 2) Otherwise probe candidates in order (short retry each).
          tried=""
          for ep in "${DOCKER_HOST:-}" unix:///var/run/docker.sock tcp://localhost:2375 tcp://localhost:2376 tcp://docker:2375 tcp://docker:2376; do
            [ -n "$ep" ] || continue
            case " $tried " in *" $ep "*) continue ;; esac
            tried="$tried $ep"
            i=0
            while [ "$i" -lt 10 ]; do
              if DOCKER_HOST="$ep" docker version --format '{{.Server.Version}}' >/dev/null 2>&1; then
                echo "using probed endpoint $ep"
                echo "DOCKER_HOST=$ep" >> "$GITHUB_ENV"
                exit 0
              fi
              i=$((i+1)); sleep 2
            done
          done

          echo "::error::no reachable docker daemon (tried: ${DOCKER_HOST:-<unset>}, unix:///var/run/docker.sock, tcp://localhost:2375, tcp://localhost:2376, tcp://docker:2375, tcp://docker:2376)" >&2
          exit 1

      # Job and app containers share the daemon, so put them on one user-defined network
      # and reach the app by service DNS — no endpoint-derived URLs (the job's netns has
      # no default route on this runner). The alias `app` is declared in docker-compose.ci.yml.
      - name: Prepare e2e network
        run: |
          set -u
          docker network inspect flight-ci-e2e >/dev/null 2>&1 || docker network create flight-ci-e2e
          if ! docker network connect flight-ci-e2e "$(hostname)"; then
            echo "::error::failed to attach job container '$(hostname)' to flight-ci-e2e — the job must run in a container on the shared daemon (check runner config)" >&2
            exit 1
          fi
          docker network inspect flight-ci-e2e --format 'containers on flight-ci-e2e: {{range .Containers}}{{.Name}} {{end}}'
          echo "E2E_BASE_URL=http://app:3000" >> "$GITHUB_ENV"

      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: 22

      # bun drives installs (repo ships bun.lock, no package-lock.json); pinned to the
      # same major as oven/bun in the Dockerfile.
      - name: Install bun
        run: npm i -g bun@1.4.2

      - name: Install dependencies
        run: bun install --frozen-lockfile

      - name: Build
        run: npm run build

      - name: Unit tests
        run: npx vitest run

      # Browsers run locally in CI (PW_REMOTE_BROWSER=0 below): the shared remote browser
      # server at 192.168.1.4 cannot reach a stack inside dind, and local chromium keeps
      # the job self-contained.
      - name: Install browsers (local)
        run: npx playwright install --with-deps chromium

      # E2E against an isolated stack on the shared daemon — never the production instance.
      # docker-compose.ci.yml joins the flight-ci-e2e network prepared above; project name
      # flight-ci keeps it distinct from production. E2E_DEPLOY_CMD makes the config's
      # webServer block deploy + wait for readiness (http://app:3000 via service DNS);
      # E2E_COMPOSE_ARGS points state.spec.ts' mid-run `docker compose restart flight` at
      # the same file + project. DOCKER_HOST/E2E_BASE_URL come from GITHUB_ENV above.
      - name: E2E (isolated stack in dind)
        env:
          PW_REMOTE_BROWSER: "0"
          E2E_DEPLOY_CMD: docker compose -f docker-compose.ci.yml -p flight-ci up -d --build
          E2E_COMPOSE_ARGS: "-f docker-compose.ci.yml -p flight-ci"
        run: npx playwright test

      # The daemon is shared with production — never leave our stack or network behind.
      # -v drops the named DB volume so every run seeds fresh (no schema drift between PRs).
      - name: Cleanup e2e stack + network
        if: always()
        run: |
          docker compose -f docker-compose.ci.yml -p flight-ci down --remove-orphans -v || true
          docker network remove flight-ci-e2e 2>/dev/null || true