# Cup26 — World Cup 2026 dashboard

A local-first PWA for the 2026 FIFA World Cup: **live scores**, a **model-driven
prediction engine**, and **data-story visualizations** — all in one TypeScript app.

- **Live** — fixtures, group tables and a knockout bracket that update over a
  WebSocket as results come in.
- **Predict** — an Elo + Dixon-Coles + Monte-Carlo model that simulates the whole
  tournament: per-match win/draw/loss, championship odds, and a title-race chart
  that moves with every result.
- **Story** — StatsBomb open-data visualizations (shot map, xG race, pass
  networks) of the 2022 World Cup final.

## Stack

Vite + React 19 + TypeScript (strict), Tailwind 4, TanStack Router, Zustand, a
Fastify WebSocket server, Recharts + custom SVG. Packaged as an installable PWA
and a single Docker image. Bun for tooling.

## Data sources

| Source | Used for | Notes |
|---|---|---|
| [openfootball/worldcup.json](https://github.com/openfootball/worldcup.json) | 2026 fixtures + bracket structure | public domain, no key |
| [football-data.org](https://www.football-data.org/) | live scores & status | free tier, World Cup included, 10 req/min, **delayed** |
| SofaScore (unofficial) | near-real-time scores/events | optional, fragile, feature-flagged |
| [martj42 international results](https://github.com/martj42/international_results) | Elo / goals model training | 49k matches, 1872→now |
| [StatsBomb Open Data](https://github.com/statsbomb/open-data) | the Story page | 2022 WC final event data |

All external calls happen **server-side**, so the browser only talks to its own
origin and the client CSP stays locked to `'self'`.

## Develop

```bash
bun install
bun run data:build      # generate icons + fixtures.json + ratings.json
bun run dev             # web UI on http://localhost:5173 (proxies /api + /ws)
bun run dev:server      # the Fastify live/model server on :8787 (separate shell)
```

Without a `FOOTBALL_DATA_TOKEN` the app runs in **seed-only** mode (full schedule,
model and story; no live scores). To exercise the live pipeline in dev:

```bash
curl -XPOST localhost:8787/api/dev/score -H content-type:application/json \
  -d '{"num":1,"homeScore":2,"awayScore":1,"status":"finished"}'
```

## Test & build

```bash
bun run test            # vitest (model + standings invariants)
bun run build           # tsc -b && vite build  (the deploy gate)
```

## Deploy

A self-contained Docker image serves the built PWA **and** the live/model server.

```bash
docker build -t cup26 .
docker run -p 8787:8787 -e FOOTBALL_DATA_TOKEN=... cup26
```

`deploy/cup26.compose.yml` is a Traefik-ready Compose project (mirrors the
sibling TTRPG deploy): rsync the repo to the host, drop it in as
`docker-compose.yml`, set `FOOTBALL_DATA_TOKEN`, then `docker compose up -d --build`.

### Environment

| Var | Default | Purpose |
|---|---|---|
| `PORT` | `8787` | server port |
| `FOOTBALL_DATA_TOKEN` | – | football-data.org API token (enables live scores) |
| `ENABLE_SOFASCORE` | `false` | layer the unofficial real-time source on top |
| `SIM_ITER` | `20000` | Monte-Carlo iterations per recompute |
| `ALLOWED_ORIGINS` | – | comma-separated WebSocket origin allowlist |

Odds are model estimates for fun, **not betting advice**.
