# gates — re-run this repo's gate entry point on every push, on a machine that does not care who
# pushed or what they typed.
#
#   *** THIS REPORTS. IT CANNOT REFUSE. ***
#
# felhom repos push straight to `main` with no pull request, so there is no merge for a status
# check to stand at. The refusing half is `.githooks/pre-push`, which is local to a clone and which
# `git push --no-verify` skips; this half is what notices when that happened. Neither half is the
# whole thing, and both are named in documentation/backlog/OPEN-ITEMS.md R-168.
#
# NO `uses:` STEP ANYWHERE, deliberately: JavaScript actions need a node runtime in the runner, and
# the runner is a host-mode container with python3 and git and nothing else (see
# homelab-manifests/gitea-system/act-runner.yaml for why it is not privileged). Probe P3 measured
# that a plain `git fetch` of the pushed SHA from the in-cluster Gitea service is enough.
#
# A failing run must reach a person — a detector nobody hears is the defect R-29 filed, rebuilt one
# layer up. That is the last step, and it runs ONLY on failure.
name: gates
on: [push]

jobs:
  gates:
    runs-on: felhom-gates
    steps:
      - name: Fetch the pushed commit
        run: |
          # Shallow, and pinned to the exact SHA that was pushed — not to the branch tip, which can
          # move under us if two pushes race. Probe P3 proved the two are equal when done this way.
          git init -q .
          git remote add origin http://gitea.gitea-system.svc.cluster.local:3000/admin/felhom.eu.git
          git fetch -q --depth 1 origin "$GITHUB_SHA"
          git checkout -q FETCH_HEAD
          echo "checked out $(git rev-parse HEAD)"

      - name: Run the gate entry point
        # The ONLY thing CI runs. No go build, no go test, no linting, no deploy — those are either
        # already reliably run by a person or none of CI's business. The exit code IS the result:
        # no `|| true`, no pipe that could swallow it.
        run: python3 scripts/repo_gates.py --fast

      - name: Alarm on failure
        # THE POINT OF THE WHOLE THING. Probe P5 measured that a failed run produces NO mail, NO
        # notification row and NO log line from Gitea itself — a red tick in a web UI nobody watches
        # is exactly the shape R-29 filed against. So the run sends its own alarm, on the project's
        # existing transactional path (Resend, the same one the hub uses), and it prints the
        # provider's accepted id so "it was sent" is an observable rather than an assumption.
        if: failure()
        env:
          RESEND_API_KEY: ${{ secrets.RESEND_API_KEY }}
        run: |
          python3 - > payload.json <<'PY'
          import json, os
          repo = os.environ.get("GITHUB_REPOSITORY", "?")
          sha  = os.environ.get("GITHUB_SHA", "?")
          run  = os.environ.get("GITHUB_RUN_NUMBER", "?")
          srv  = os.environ.get("GITHUB_SERVER_URL", "https://gitea.dooplex.hu")
          print(json.dumps({
              "from": "Felhom CI <monitoring@felhom.eu>",
              "to": ["admin@felhom.eu"],
              "subject": "[felhom CI] gates FAILED in %s" % repo,
              "text": (
                  "The gate entry point exited non-zero.\n\n"
                  "Repository : %s\n"
                  "Commit     : %s\n"
                  "Run        : %s/%s/actions/runs/%s\n\n"
                  "The failing gate names itself in the run log.\n\n"
                  "If the local pre-push hook was GREEN for this commit, then CI and the hook\n"
                  "disagree - that is a finding about the gates themselves, not about CI, and it\n"
                  "outranks whatever the push was for.\n"
              ) % (repo, sha, srv, repo, run),
          }))
          PY
          curl -sS --fail-with-body -X POST https://api.resend.com/emails \
            -H "Authorization: Bearer $RESEND_API_KEY" \
            -H "Content-Type: application/json" \
            --data @payload.json > resend-response.json
          python3 -c "import json;print('RESEND-ACCEPTED id=%s' % json.load(open('resend-response.json'))['id'])"