package main

import (
	"encoding/json"
	"net/http"
)

func mountLedRingAPI(mux *http.ServeMux, link *managedSerial) {
	mux.HandleFunc("/api/led-ring", func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost {
			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
			return
		}
		serveLedRingPost(w, r, link)
	})
}

func serveLedRingPost(w http.ResponseWriter, r *http.Request, link *managedSerial) {
	var body ledRingAPIRequest
	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
		writeJSON(w, http.StatusBadRequest, ledRingAPIResponse{Error: "invalid JSON"})
		return
	}
	if body.Mode == "" {
		writeJSON(w, http.StatusBadRequest, ledRingAPIResponse{Error: "mode required"})
		return
	}
	out := applyLedRing(link, body)
	status := http.StatusOK
	if out.Error != "" {
		status = http.StatusServiceUnavailable
	} else if !out.Success {
		status = http.StatusServiceUnavailable
	}
	writeJSON(w, status, out)
}