#include 
#include 
#include 
#include 

#define RELAY_PIN D1
#define LDR_PIN   A0

// ===== Wi-Fi Credentials =====
const char* ssid = "TestESP";
const char* password = "12345678";

// ===== Settings =====
int threshold = 600;      // Default LDR threshold
int startHour = 18, startMinute = 0, startSecond = 0;
int endHour   = 6,  endMinute = 0, endSecond = 0;

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org", 19800, 60000); // +5:30 offset (India)
ESP8266WebServer server(80);

bool manualOverride = false;
bool manualState = false;

void handleRoot() {
  int ldrValue = analogRead(LDR_PIN);
  timeClient.update();
  int hourNow = timeClient.getHours();

  bool dark = (ldrValue < threshold);
  bool night = (hourNow >= startHour || hourNow < endHour);
  bool autoState = (dark || night);
  bool lightOn = manualOverride ? manualState : autoState;

  String html = R"rawliteral(
  
  
  
  
  

  
🌙 Smart Auto Light
  

    LDR Value: )rawliteral" + String(ldrValue) + R"rawliteral(

    Time: )rawliteral" + String(hourNow) + R"rawliteral(:00

    Mode: )rawliteral" + String(manualOverride ? "Manual" : "Auto") + R"rawliteral(

    Light: )rawliteral" + String(lightOn ? "ON" : "OFF") + R"rawliteral(
  
  
  

    
Manual Control
    ON
    OFF
    Switch to )rawliteral" + String(manualOverride ? "Auto" : "Manual") + R"rawliteral(
  

  

    
Settings
    

      Threshold: 

      Start Time (HH:MM:SS): 

      End Time (HH:MM:SS): 

      Update
    
  

  
  
  
  )rawliteral";

  server.send(200, "text/html", html);
}

void handleCommand() {
  String cmd = server.uri();
  if (cmd == "/on") { manualOverride = true; manualState = true; }
  else if (cmd == "/off") { manualOverride = true; manualState = false; }
  else if (cmd == "/mode") { manualOverride = !manualOverride; }
  server.sendHeader("Location", "/");
  server.send(303);
}

void handleSet() {
  if (server.hasArg("th")) threshold = server.arg("th").toInt();
  if (server.hasArg("st")) {
    sscanf(server.arg("st").c_str(), "%d:%d:%d", &startHour, &startMinute, &startSecond);
  }
  if (server.hasArg("et")) {
    sscanf(server.arg("et").c_str(), "%d:%d:%d", &endHour, &endMinute, &endSecond);
  }
  server.sendHeader("Location", "/");
  server.send(303);
}

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

  Serial.println("\nConnecting to Wi-Fi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWi-Fi connected: " + WiFi.localIP().toString());

  timeClient.begin();
  timeClient.update();

  server.on("/", handleRoot);
  server.on("/on", handleCommand);
  server.on("/off", handleCommand);
  server.on("/mode", handleCommand);
  server.on("/set", handleSet);
  server.begin();
  Serial.println("Web server started!");
}

void loop() {
  server.handleClient();
  timeClient.update();

  int ldrValue = analogRead(LDR_PIN);
  int hourNow = timeClient.getHours();
  bool dark = (ldrValue < threshold);
  bool night = (hourNow >= startHour || hourNow < endHour);
  bool autoState = (dark || night);
  bool lightOn = manualOverride ? manualState : autoState;

  digitalWrite(RELAY_PIN, lightOn ? LOW : HIGH);
  delay(1000);
}