#include <mechButton.h>

const int A_BTN_PIN = 10;
const int B_BTN_PIN = 9;
const int C_BTN_PIN = 8;
const int D_BTN_PIN = 7;

mechButton aBtn(A_BTN_PIN);
mechButton bBtn(B_BTN_PIN);
mechButton cBtn(C_BTN_PIN);
mechButton dBtn(D_BTN_PIN);

char* makeMsg(int value)  {
  static char msgPrice[8];

  int dollarVal = value / 100;
  int centVal = value % 100;
  sprintf(msgPrice, "$%d.%02d", dollarVal, centVal);  // add null????????
  char* msgPointer = msgPrice;
  return msgPointer;
}

void aCallback(void) {
  if (!aBtn.trueFalse()) {
    Serial.println("A pressed");
    char* printVal = makeMsg(175);
    Serial.print(printVal);
    Serial.println();
  }
}

void bCallback(void) {
  if (!bBtn.trueFalse()) {
    Serial.println("B pressed");
    char* printVal = makeMsg(495);
    Serial.print(printVal);
    Serial.println();
  }
}

void cCallback(void) {
  if (!cBtn.trueFalse()) {
    Serial.println("C pressed");
    char* printVal = makeMsg(365);
    Serial.print(printVal);
    Serial.println();
    char* printVal2 = makeMsg(635);
    Serial.print(printVal2);
    Serial.println();
  }
}

void dCallback(void) {
  //char msgPrice[8];
  char msgCredit[8];
  int credit = 775;
  int price = 885;

  if (!dBtn.trueFalse()) {

    int cdollarVal = credit / 100;
    int ccentVal = credit % 100;
    sprintf(msgCredit, "$%d.%02d", cdollarVal, ccentVal);

    //int dollarVal = price / 100;
    //int centVal = price % 100;
    //sprintf(msgPrice, "$%d.%02d", dollarVal, centVal);

    char* printVal = makeMsg(price);

    Serial.println("D pressed");
    Serial.print(msgCredit);
    Serial.println();
    Serial.print(printVal);
    Serial.println();
  }
}

void setup() {
  Serial.begin(115200);
  pinMode(A_BTN_PIN, INPUT_PULLUP);
  pinMode(B_BTN_PIN, INPUT_PULLUP);
  pinMode(C_BTN_PIN, INPUT_PULLUP);
  pinMode(D_BTN_PIN, INPUT_PULLUP);
  aBtn.setCallback(aCallback);
  bBtn.setCallback(bCallback);
  cBtn.setCallback(cCallback);
  dBtn.setCallback(dCallback);
}

void loop() {
  idle();
}