// Runaway Railcar - Reckoning Machine
// BMR 11-17-22
// Updated: BMR 12-30-22

const int temp = 3;
const int pass = 4;
const int cargo = 5;
const int steam = 6;
const int sos = 7;
const int lock = 8;
const int spd = A0;
const int oil = A1;

int ledMatrix[25] = { 22, 23, 24, 25, 26,
                      27, 28, 29, 30, 31,
                      32, 33, 34, 35, 36,
                      37, 38, 39, 40, 41,
                      42, 43, 44, 45, 46 };
int ledStep = 0;
int stepTime = 250;

unsigned long time;
unsigned long lastTime = 0;

// Function for setting all the pinModes; call at setup()
void setPins() {
  for (int thisPin = 3; thisPin < 9; thisPin++) {
    pinMode(thisPin, INPUT_PULLUP);
  }

  pinMode(spd, INPUT_PULLUP);
  pinMode(oil, INPUT_PULLUP);

  for (int thisPin = 22; thisPin < 47; thisPin++) {
    pinMode(thisPin, OUTPUT);
  }

  pinMode(lock, OUTPUT);
}

// Wait function for use instead of delay()
void wait(int period) {
  while (millis() < time + period) {
      // Timer delay
    }
}

// Check inputs; unlock if solved
void inspectorDetector() {
  digitalRead(temp) == 1 && digitalRead(pass) == 1 && 
  digitalRead(cargo) == 1 && digitalRead(steam) == 1 && 
  digitalRead(sos) == 1 && 
  analogRead(spd) > 850 && analogRead(spd) < 900 && 
  analogRead(oil) > 125 && analogRead(oil) < 150 ? 
  digitalWrite(lock, LOW) : digitalWrite(lock, HIGH);
}

// Turn on a row of LEDs
void scanBar(int row) {
  for (int i = 0; i < 25; i++) {
    digitalWrite(ledMatrix[i], LOW);
  }
  
  for (int i = row; i < row + 5; i++) {
    digitalWrite(ledMatrix[i], HIGH);
  }
}

// Fire up the Matrix
void theMatrix() {
  if (time > lastTime + stepTime) {
    switch (ledStep) {
      case 0:
        scanBar(0);
        ledStep++;
        break;
      
      case 1:
        scanBar(5);
        ledStep++;
        break;

      case 2:
        scanBar(10);
        ledStep++;
        break;

      case 3:
        scanBar(15);
        ledStep++;
        break;

      case 4:
        scanBar(20);
        ledStep = 0;
        break;
    }

    lastTime = time;
  }
}

// Debugging monitor
void debugger() {
  // Serial.print("temp:");
  // Serial.print("\t");
  // Serial.print(digitalRead(temp));
  // Serial.print("\t");
  // Serial.print("Pass:");
  // Serial.print("\t");
  // Serial.print(digitalRead(pass));
  // Serial.print("\t");
  // Serial.print("cargo:");
  // Serial.print("\t");
  // Serial.print(digitalRead(cargo));
  // Serial.print("\t");
  // Serial.print("Steam:");
  // Serial.print("\t");
  // Serial.print(digitalRead(steam));
  // Serial.print("\t");
  // Serial.print("SOS:");
  // Serial.print("\t");
  // Serial.print(digitalRead(sos));
  // Serial.print("\t");
  Serial.print("Speed:");
  Serial.print("\t");
  Serial.print(analogRead(spd));
  Serial.print("\t");
  Serial.print("Oil:");
  Serial.print("\t");
  Serial.print(analogRead(oil));
  Serial.print("\t");
  Serial.print("Lock:");
  Serial.print("\t");
  Serial.print(digitalRead(lock));
  Serial.print("\t");
  Serial.print("Step:");
  Serial.print("\t");
  Serial.print(ledStep);
  Serial.println();

  wait(100);
}

void setup() {
  Serial.begin(9600);
  setPins();
  digitalWrite(lock, HIGH);
}
// Ha I infiltrated your document!! Hahahaha

void loop() {
  time = millis();
  inspectorDetector();
  theMatrix();
  debugger();
}