#include "Globals.h"
#include "InputHandler.h"
#include "Menu.h"
#include "T9Input.h"
#include "Morse.h"

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  lcd.createChar(0, charUp);
  lcd.createChar(1, charDown);
  lcd.createChar(2, charUpDown);
  lcd.createChar(3, charEnter);

  //Pin Mode
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);
  pinMode(AUDIO_IN_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  digitalWrite(LED_PIN, LOW);
  pinMode(SPEAKER_PIN, OUTPUT);
  digitalWrite(SPEAKER_PIN, LOW);
  noTone(SPEAKER_PIN);

  // Setup DSP for Morse reception
  int k = (int)(0.5 + ((n * targetFreq) / samplingFreq));
  float omega = (2.0 * PI * k) / n;
  sine = sin(omega);
  cosine = cos(omega);
  coeff = 2.0 * cosine;

  // Show welcome screen
  currentMenu = MENU_WELCOME;
  updateLCD();
}

void loop() {
  processKeypad();

  // In message-entry mode, commit any pending T9 letter if the timeout has elapsed.
  if (currentMenu == MENU_ENTER_MSG && currentT9Key != '\0' && (millis() - lastT9PressTime > t9Timeout)) {
    commitT9Letter();
    updateEnterMsgDisplay();
  }
}