#include <Arduino.h>
#include <LittleFS.h>
#include <WiFi.h>
#include <WebServer.h>

const char* ssid = "tksteti";
const char* password = "ProsimTeNevim";
WebServer server(80);

const int ledPin1 = 2;
const int ledPin2 = 4;
bool ledState1 = false;
bool ledState2 = false;

String loadHtml() {
  File file = LittleFS.open("/index.html","r");
  if(!file) {
    Serial.println("Chyba při otevírání /index.html");
    return "soubor nenalezen";
  }
  String html = file.readString();
  file.close();
  //String(ledState1) převede bool na String)
  html.replace("STAVLED1", String(ledState1));
  html.replace("STAVLED2", ledState2 ? "ON" : "OFF");
  return html;
}

void handleRoot(){
  server.send(200,"text/html",loadHtml());
}

void handleLED1() {
  if(server.hasArg("state")) {
    String state = server.arg("state");
    if(state == "on") {
      ledState1 = true;
      digitalWrite(ledPin1,HIGH);
    } else {
      ledState1 = false;
      digitalWrite(ledPin1,LOW);
    }
    server.sendHeader("Location","/");
    server.send(302,"text/plain","");
  } else {
    server.send(400,"BAD REQUEST");
  }
}

void handleLED2() {
  if(server.hasArg("state")) {
    String state = server.arg("state");
    if(state == "on") {
      ledState2 = true;
      digitalWrite(ledPin2,HIGH);
    } else {
      ledState2 = false;
      digitalWrite(ledPin2,LOW);
    }
    server.sendHeader("Location","/");
    server.send(302,"text/plain","");
  } else {
    server.send(400,"BAD REQUEST");
  }
}

void setup() {
  Serial.begin(115200);
  pinMode(ledPin1,OUTPUT);
  pinMode(ledPin2,OUTPUT);
  digitalWrite(ledPin1,LOW);
  digitalWrite(ledPin2,LOW);

  WiFi.setHostname("ESP-Prijmeni");
  WiFi.begin(ssid,password);
  while(WiFi.status() != WL_CONNECTED){
    delay(200);
    Serial.print(".");
  }
  Serial.println("WiFi připojeno");
  Serial.print("IP adresa: ");
  Serial.print(WiFi.localIP());

  if(!LittleFS.begin()){
    Serial.println("Chyba při zavádění (mounting) LittleFS");
    return;
  }

  server.on("/",handleRoot);
  server.on("/led1",handleLED1);
  server.on("/led2",handleLED2);
  server.onNotFound([](){
    server.send(404,"text/plain","Stranka nenalezena");
  });

  server.begin();
  Serial.println("HTTP Server spuštěn");
}

void loop() {
  server.handleClient();
}