// Package web serves the laundry status API and embedded phone-first page.
package web

import (
	_ "embed"
	"encoding/json"
	"net/http"

	"mqtt_washingmachine/internal/status"
)

//go:embed static/index.html
var indexHTML []byte

// NewHandler fetches a fresh snapshot for each API request. Disabling caching
// keeps reloads and polling from showing a previous laundry state.
func NewHandler(snapshot func() status.Result) http.Handler {
	mux := http.NewServeMux()
	mux.HandleFunc("GET /{$}", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "text/html; charset=utf-8")
		w.Header().Set("Cache-Control", "no-store")
		w.Write(indexHTML)
	})
	mux.HandleFunc("GET /api/status", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		w.Header().Set("Cache-Control", "no-store")
		json.NewEncoder(w).Encode(snapshot())
	})
	return mux
}