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#include <WiFi.h>
#include <WiFiClient.h>
#include <WiFiAP.h>
#include <iostream>
#include <string>

const char *ssid = "TEST";
const char *password = "TESTTEST";
int channel = -1;

void setup() {
  Serial.begin(115200);
  while (!Serial);
  
  WiFi.mode(WIFI_AP);
  //WiFi.setTxPower(WIFI_POWER_7dBm);
  WiFi.setTxPower(WIFI_POWER_5dBm);
  updateAccessPoint();
}

void loop() {
  static String inputBuffer = "";
  
  if (Serial.available() > 0) {
    char c = Serial.read();
    if (c == '\n' || c == '\r') {
      processInput(inputBuffer);
      inputBuffer = "";
    } else {
      inputBuffer += c;
    }
  }
}

void processInput(String input) {
  if (input[0] < 0x20) return;
  if (input[0] == 'C' || input[0] == 'c') { // Change channel
    int value = input.substring(1).toInt();
    if (value < 1 || value > 13) {
      Serial.println("Invalid channel number. Please enter a value between 1 and 13.");
      return;
    }
    channel = value;
    
  } else if (input[0] == 'P' || input[0] == 'p') { // Change power
    int value = input.substring(1).toInt();
    WiFi.setTxPower((wifi_power_t)value);
    
  } else {
    Serial.println("Invalid input format. Use C[0-13], P[0-99]");
    return;
  }
  
  updateAccessPoint();
  return;
}

void updateAccessPoint() {
  if (WiFi.softAPdisconnect(true)) {
    Serial.println("Access Point disconnected");
    delay(100);
  }

  WiFi.softAP(ssid, password, channel);
  
  int txPower = WiFi.getTxPower();
  Serial.print("TX power: ");
  Serial.print(txPower);
  Serial.print(", channel: ");
  Serial.println(channel);
}