# btcprice

Bitcoin price tracker UI — Clojure Kit web application. Serves the HTML/HTMX/Tailwind UI. Connects to btcdata for live price data via SSE.

## Build & Development Commands

- `make run` — Start dev server on port 4000
- `make repl` — Start nREPL
- `make test` — Run tests
- `make tailwind` — Watch Tailwind CSS for changes
- `make uberjar` — Build production JAR

## REPL Commands

```clojure
(dev-prep!)   ;; Prepare dev system
(go)          ;; Start system
(reset)       ;; Reload code & restart
(halt)        ;; Stop system
```

## Architecture

- **Framework:** Kit (Integrant-based)
- **Server:** Undertow
- **Routing:** Reitit
- **Templates:** Hiccup + vanilla JS EventSource
- **Styling:** Tailwind CSS v4
- **Data backend:** btcdata (separate service at BTCDATA_URL, default http://localhost:4100)
- **No database** — all data comes from btcdata

## Source Layout

```
src/clj/pmagnus/btcprice/
├── core.clj              # App entry point
├── config.clj            # System config loader
└── web/
    ├── handler.clj       # Ring handler + routes
    ├── htmx.clj          # page/fragment macros
    ├── controllers/
    │   └── health.clj    # Health check
    ├── middleware/
    │   ├── core.clj      # Base middleware
    │   ├── exception.clj # Exception handling
    │   └── formats.clj   # Content negotiation
    └── routes/
        ├── api.clj       # /api routes (JSON)
        ├── ui.clj        # UI routes (HTML + EventSource)
        └── utils.clj     # Route utilities
```