//Handlers for Web Server
void handle_index() {
  server.send(200, "text/html", "[OK] - hds 4-way relay module");
}

//Handle turning on the switch

void handle_toggle() {
  String relayState = server.arg("relay"); // Get the value of the 'relay' parameter from the URL

  if (relayState.length() > 0) {
    int relayValue = relayState.toInt();

    // Perform actions based on the relay value (1 or 0)
    if (relayValue < 0 || relayValue > 4) {
      //Out of range
      server.send(400, "application/json", "{\"error\":\"relay index out of range\"}");
      return;
    } else {
      //In range
      relayStatus[relayValue] = !relayStatus[relayValue];
      Serial.println("Toggling relay: " + String(relayValue));
      updateRelayStatus();
      server.send(200, "application/json", "{\"status\":\"ok\"}");
      return;
    }
  } else {
    server.send(400, "application/json", "{\"error\":\"invalid relay index\"}");
  }
}


void handle_on() {
  String relayState = server.arg("relay"); // Get the value of the 'relay' parameter from the URL

  if (relayState.length() > 0) {
    int relayValue = relayState.toInt();

    // Perform actions based on the relay value (0 to 4)
    if (relayValue >= 0 && relayValue < 5) {
      // Turn on the specified relay
      relayStatus[relayValue] = true;
      Serial.println("Turning on relay: " + String(relayValue));
      updateRelayStatus();
      server.send(200, "application/json", "{\"status\":\"ok\"}");
      return;
    } else {
      // Out of range
      server.send(400, "application/json", "{\"error\":\"relay index out of range\"}");
    }
  } else {
    // Missing 'relay' parameter
    server.send(400, "application/json", "{\"error\":\"missing relay index\"}");
  }
}

void handle_off() {
  String relayState = server.arg("relay"); // Get the value of the 'relay' parameter from the URL

  if (relayState.length() > 0) {
    int relayValue = relayState.toInt();

    // Perform actions based on the relay value (0 to 4)
    if (relayValue >= 0 && relayValue < 5) {
      // Turn off the specified relay
      relayStatus[relayValue] = false;
      Serial.println("Turning off relay: " + String(relayValue));
      updateRelayStatus();
      server.send(200, "application/json", "{\"status\":\"ok\"}");
      return;
    } else {
      // Out of range
      server.send(400, "application/json", "{\"error\":\"relay index out of range\"}");
    }
  } else {
    // Missing 'relay' parameter
    server.send(400, "application/json", "{\"error\":\"missing relay index\"}");
  }
}


void handle_status() {
  DynamicJsonDocument doc(256);
  doc["relay1"] = relayStatus[0] ? true : false;
  doc["relay2"] = relayStatus[1] ? true : false;
  doc["relay3"] = relayStatus[2] ? true : false;
  doc["relay4"] = relayStatus[3] ? true : false;

  String json;
  serializeJson(doc, json);
  server.send(200, "application/json", json.c_str());
}


void handle_deviceInfo() {
  // Open the file in read mode
  File file = LittleFS.open("/config.json", "r");

  if (!file) {
    // If the file doesn't exist, send a 404 Not Found response
    server.send(404, "application/json", "{\"error\":\"device config missing from firmware\"}");
    return;
  }

  String fileContent = "";
  while (file.available()) {
    fileContent += (char)file.read();
  }
  file.close();
  server.send(200, "application/json", fileContent);
}

void handle_uuid() {
  server.send(200, "application/json", "\"" + deviceUUID + "\"");
}