name: Update App Tracking Hints

on:
  # Manual trigger from the Actions UI
  workflow_dispatch:

  # Re-merge whenever the generator, workflow, or the maintainer-
  # curated runtime overrides change. `runtime_verified_overrides.json`
  # is the file to edit when a real LXC reveals a canonical path the
  # community-scripts helper doesn't ship (legacy /app/package.json,
  # /opt/vaultwarden/bin/vaultwarden, etc.) — the generator folds it
  # into the operational catalog every run.
  push:
    branches: [main]
    paths:
      - ".github/scripts/generate_app_tracking_catalog.py"
      - ".github/workflows/update-app-tracking-hints.yml"
      - "json/runtime_verified_overrides.json"

  # Regen every 6h — picks up new community-scripts LXC apps and
  # detector-relevant script edits without needing a manual trigger.
  schedule:
    - cron: "0 */6 * * *"

jobs:
  update-hints:
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: ⬇️ Checkout the repository
        uses: actions/checkout@v6

      - name: 🐍 Set up Python
        uses: actions/setup-python@v4
        with:
          python-version: "3.11"

      - name: ⚙️ Generate app_tracking_hints.generated.json (intermediate)
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        # The generator writes 4 files; only `.generated.json` is
        # consumed downstream by the merge step. The v2 catalog and
        # per-app audit are useful for local review but not kept in
        # the repo — written under /tmp so they never appear as
        # dirty files here.
        #
        # `--runtime-overrides` folds real-CT evidence into the
        # operational hints (canonical paths, cross-method fallbacks
        # per app) so the runtime doesn't get fed helper-marker
        # false-positives.
        run: |
          python .github/scripts/generate_app_tracking_catalog.py \
            --helpers-cache json/helpers_cache.json \
            --existing json/app_tracking_hints.json \
            --runtime-overrides json/runtime_verified_overrides.json \
            --output json/app_tracking_hints.generated.json \
            --v2-output /tmp/app_tracking_catalog.v2.json \
            --audit-output /tmp/app_tracking_hints.audit.json

      - name: 🧬 Smart-merge generated into app_tracking_hints.json
        # Single source of truth: `app_tracking_hints.json` is the ONE
        # file. It contains 3 kinds of entries:
        #   1. Auto-verified from community-scripts (the generator
        #      manages every "generator-owned" field on these).
        #   2. User-edited additions to those entries — extra fields
        #      the generator doesn't touch (default_ports,
        #      file_fallbacks, custom logo overrides…).
        #   3. User-only entries the generator can't verify (Docker,
        #      AdGuard, Pi-hole, WireGuard, …) — left alone.
        # Merge rule: for slugs the generator produces, refresh only
        # the whitelisted fields; preserve everything else. For slugs
        # NOT in the generator's output, keep the existing entry
        # untouched.
        run: |
          python - <<'PY'
          import json
          from pathlib import Path

          GEN = Path("json/app_tracking_hints.generated.json")
          OUT = Path("json/app_tracking_hints.json")

          # Fields owned by the generator — refreshed on every run.
          # These are all populated deterministically by the generator
          # (the audit script folds `runtime_verified_overrides.json`
          # in as it runs), so a local hand-edit for a generator-known
          # slug would get overwritten on the next tick. To add a new
          # canonical path or a cross-method fallback for a slug the
          # generator already knows, edit `runtime_verified_overrides
          # .json` — that file IS the maintainer-controlled input.
          #
          # For user-only slugs (Docker, WireGuard, Pi-hole and any
          # other entry not in the generator's output) EVERY field is
          # preserved verbatim by the merge below — the whitelist only
          # governs generator-covered slugs.
          GENERATOR_FIELDS = {
              "installed_via", "package", "file_path", "file_regex",
              "binary_path", "repo", "github_source", "tag_regex",
              "installed_regex",
              # Upstream source discriminator + per-type fields
              # (http_json + docker_hub). Kept in the whitelist so a
              # curated entry in runtime_verified_overrides.json can
              # supply them and the smart merge won't drop them on the
              # next regeneration.
              "upstream_type", "upstream_url", "upstream_json_path",
              "docker_image",
              "logo", "website",
              "default_ports", "file_fallbacks", "alt_detectors",
          }

          generated = json.loads(GEN.read_text(encoding="utf-8"))
          existing = {}
          if OUT.is_file():
              try:
                  existing = json.loads(OUT.read_text(encoding="utf-8"))
                  if not isinstance(existing, dict):
                      existing = {}
              except json.JSONDecodeError:
                  existing = {}

          merged = {}
          for slug, gen_entry in generated.items():
              base = dict(existing.get(slug) or {})
              # Refresh generator-owned fields (add/update).
              for k, v in gen_entry.items():
                  if k in GENERATOR_FIELDS:
                      base[k] = v
              # Drop generator-owned fields that the generator no
              # longer emits for this slug (e.g. path renamed away).
              for k in list(base):
                  if k in GENERATOR_FIELDS and k not in gen_entry:
                      del base[k]
              merged[slug] = base
          # Preserve user-only entries the generator can't verify.
          for slug, entry in existing.items():
              if slug not in generated and isinstance(entry, dict):
                  merged[slug] = dict(entry)

          OUT.write_text(json.dumps(merged, indent=2, sort_keys=True) + "\n", encoding="utf-8")

          added = sorted(set(generated) - set(existing))
          removed = sorted(set(existing) - set(generated) - {s for s, e in existing.items() if not (
              set(e.keys()) - GENERATOR_FIELDS
          )})
          print(f"merged: {len(merged)} entries "
                f"(generated={len(generated)}, existing={len(existing)})")
          if added:
              print(f"  new from generator: {len(added)}")
          # Clean up the intermediate file so it doesn't get committed.
          GEN.unlink()
          PY

      - name: 📤 Commit + push if changed
        run: |
          git config user.name "ProxMenuxBot"
          git config user.email "bot@proxmenux.local"
          git add json/app_tracking_hints.json
          git diff --cached --quiet || git commit -m "Update app tracking hints"
          git push