#include <Arduino.h>
#include <LittleFS.h>
#include <WiFi.h>
#include <ESPAsyncWebServer.h>
#include <FastLED.h>

const char* ssid = "tksteti";
const char* password = "ProsimTeNevim";
AsyncWebServer server(80);
#define NUM_LEDS 4
#define DATA_PIN 12
CRGB leds[NUM_LEDS];

void handleNastavit(AsyncWebServerRequest *request) {
  if (request->hasParam("barva",true)) {
    String barva = request->getParam("barva",true)->value();
    long barvaLong = strtol(barva.substring(1,7).c_str(),NULL,16);
    int r = (barvaLong >> 16) & 0xFF;
    int g = (barvaLong >> 8) & 0xFF;
    int b = barvaLong & 0xFF;

    for (int i = 0; i < NUM_LEDS; i++) {
      leds[i] = CRGB(r,g,b);
    }
    FastLED.show();
    request->send(200,"text/plain","OK");
  } else {
    request->send(400,"text/plain","Bad Request");
  }
}

void setup() {
  Serial.begin(115200);
  if(!LittleFS.begin(true)){
    Serial.println("Chyba při zavádění (mounting) LittleFS");
    return;
  }  
  WiFi.begin(ssid,password);
  while(WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(50);
  }
  Serial.println("Připojeno k WiFi");
  FastLED.addLeds<WS2812B,DATA_PIN,GRB>(leds,NUM_LEDS);
  server.on("/",HTTP_GET,[](AsyncWebServerRequest *request){
    request ->send(LittleFS,"/index.html","text/html");
  });
  server.on("/nastavit",HTTP_POST,handleNastavit);  
  server.begin();
}

void loop() {
}