# PDGA Rating Tracker

PDGA rating scraper and display app. Scrapes player ratings and course data from pdga.com, stores in SQLite, serves via Express with EJS templates and HTMX.

## Tech Stack

- **Runtime:** Node.js 22 (slim/Debian-based in Docker)
- **Hosting:** Gitea (`gitea.shcizo.se/shcizo/pdga-rating`) — use `tea` CLI for issues/PRs, not `gh`
- **Server:** Express with EJS templates
- **Database:** SQLite3 (file: `ratings.db`, Docker: `/app/data/ratings.db`)
- **Frontend:** HTMX + vanilla JS (in `public/js/`)
- **Scraping:** Puppeteer (with stealth plugin) + direct HTTP
- **Logging:** Pino (JSON in production, pino-pretty in dev)
- **CI/CD:** Gitea Actions (tag-triggered docker build/push to `gitea.shcizo.se/shcizo/pdga-rating`)

## Project Structure

```
server.js              # Express app entrypoint
src/
  logger.js            # Pino logger instance
  db.js                # SQLite init, migrations, seeding
  models/              # Data access (player.js, course.js)
  routes/              # Express routes (players, courses, pages)
  scrapers/            # PDGA scrapers (HTTP + Puppeteer)
  services/            # Business logic (player-service, rating-calculator)
views/
  pages/               # EJS page templates
  partials/            # EJS partials (shared layout)
public/
  css/                 # Stylesheets
  js/                  # Client-side JS (HTMX interactions)
```

## Commands

- `npm start` — Start production server (port 3000)
- `npm run dev` — Start with nodemon (auto-reload)
- `LOG_LEVEL=debug npm start` — Enable debug logging
- `docker compose up` — Run via Docker

**No test framework or lint setup** — `package.json` has only `start` and `dev` scripts. If adding either, document it here.

## Conventions

- **Logging:** Use `require('./logger')` (or relative path). Never use `console.log/error` in backend code. Use appropriate Pino levels: `debug` for verbose/diagnostic data, `info` for operational status, `warn` for retries/degraded state, `error` for failures, `fatal` for startup crashes.
- **Frontend JS:** `console.error` is fine in `public/js/` — runs in browser, no Pino.
- **Commits:** Conventional commits (`feat:`, `fix:`, `refactor:`, `chore:`, `ci:`).
- **Releases:** Manual version bump — edit `version` in `package.json` + `package-lock.json`, commit as `<version>`, tag `v<version>`, push commit + tag (`git push origin main v<version>`). Triggers `.gitea/workflows/docker-build.yml` which builds and pushes the image. Auth uses repo secret `PACKAGES_TOKEN` (PAT with `write:package`) — the auto-injected `GITEA_TOKEN` does not have effective registry access.
- **Scraping:** Two strategies per entity: direct HTTP (fast, preferred) with Puppeteer fallback (stealth plugin for anti-bot). Rate limiting must be respected.
- **Database:** Migrations run automatically on startup in `db.js`. Schema changes go there.
- **Templates:** EJS with shared layout in `views/partials/`. Pages use HTMX for dynamic content loading.

## PDGA Domain Notes

- **Rating publication cycle:** PDGA officially recalculates ratings on the **second Tuesday of each month**. `getNextPDGAUpdateDate()` in `src/services/rating-calculator.js` computes this — round filtering uses it as cutoff.
- **Predicted rating algorithm:** `calculatePredictedRating(roundRatings)` replicates PDGA's formula — 12-mo window (expands to 24 if <8 rounds), outlier removal at ≥7 rounds (2.5σ + 100pt threshold), double-weighting of recent 25% at ≥9 rounds. Returns `{rating, stdDev, debugLog}`.
- **Rate limits:** `POST /api/refresh-round-history/:pdgaNumber` enforces a 24h cooldown per player (`src/routes/players.js`). Don't bypass — PDGA's site rate-limits aggressively.
- **Round history refresh** uses Puppeteer (stealth plugin), other scraping prefers direct HTTP. Predicted rating is recomputed and stored on each refresh.

## Environment Variables

| Variable | Default | Description |
|----------|---------|-------------|
| `LOG_LEVEL` | `info` | Pino log level |
| `NODE_ENV` | — | Set to `production` for JSON logs |
| `DB_PATH` | `./ratings.db` | SQLite database path |
| `PUPPETEER_EXECUTABLE_PATH` | — | Chromium path (set in Docker) |