// https://forum.arduino.cc/t/3d-archery-pop-up-system-computer-replacement/1144336/18
// https://wokwi.com/projects/369652820252224513

/*
  Total targets:  12
  Active targets: 6 (random 6 of 12)

  Original sequence of events:
  - random start time
  - 6 random relays
  - 10 to 15 seconds relay activation
  - 20 seconds cycle deactivate relays

  Updated sequence of events:
  - add pushbutton
  - press start button. *do not use D0 or D1*... use A0 with INPUT_PULLUP
  - pause 20 seconds
  - target 1 of 6 activated for 5 to 10 seconds then deactivated
  - 15 to 20 seconds between relay activation
  - target 2 of 6 activated for 5 to 10 seconds then deactivated
  - repeat for targets #3 through #6
  o 10 seconds pause after first round of six targets
  - activate active six target relays to pull arrows
  - wait for button to deactivate first six targets
  o repeat sequence for remaining 6 target targets
  - restart
*/

// int timer = 1000; // "live" time
int timer = 50; // shortened time for debugging

int i; // counter
const int buttonPin = A0;   // start/restart button
const int relayPins[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}; // pins the relays will use
const int relayTotal = 12;  // total number of targets/relays

int relayNumber[12] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; // all relays
int randomSequence;         // a random number
int relayCount;             // relayNumber
int activationTime;         // random delay to activate relay
int cycleNumber;            // number of cycles

void setup() {
  Serial.begin(115200); // can i haz monitor
  randomSeed(analogRead(A0)); // creates more random pseudo-random numbers
  for (i = 0; i < relayTotal; i++) { // number of relays
    pinMode(relayPins[i], OUTPUT); // configure array of relay pins for output
  }
  pinMode(buttonPin, INPUT_PULLUP); // start button
  if (timer < 1000) {
    Serial.print("Running on SIM time... x");
    Serial.print( 1000 / timer );
    Serial.println(" speed.");
  } else {
    Serial.print("WE ");
    delay(500);
    Serial.print("ARE ");
    delay(500);
    Serial.println("LIVE!");
  }
}

void loop() {
  if (cycleNumber++ > 1)
    cycleNumber = 1; // cycleNumber is 1 or 2
  deactivateRelays();
  cycleStart();
  assignSequence();
  activateSequence();
  activateAllRelays(); // retrieve arrows
}

void deactivateRelays() {
  Serial.print("Cycle ");
  Serial.print(cycleNumber);
  Serial.print("A: Deactivate targets: ");
  for (i = 0; i < relayTotal; i++) {
    digitalWrite(relayPins[i], LOW); // deactivate all relays
    relayNumber[i] = 0; // clear sequence number
    Serial.print(relayNumber[i]); // display relay sequence - not activated (0)
    Serial.print(" ");
  }
  Serial.println();
}

void cycleStart() {
  Serial.print("Cycle ");
  Serial.print(cycleNumber);
  Serial.print("B: Press button to continue.");
  while (digitalRead(buttonPin)) {/* contemplate 42 */} // wait for LOW from button press
  Serial.print(" Begin 20 seconds delay.");
  delay(20 * timer - activationTime * timer); // 20 seconds minus the start time
  Serial.println(" Delay complete.");
}

void assignSequence() {
  relayCount = 0;
  for (i = 0; i < relayTotal; i++)
    relayNumber[i] = 0; // clear relay sequence

  while (relayCount < relayTotal) { // number of relays assigned a random sequence
    randomSequence = random (relayTotal); // get a random number
    if (relayNumber[randomSequence] == 0) { // if zero, this element can be assigned a sequence number
      relayNumber[randomSequence] = relayCount; // element/relay is assigned a sequence number
      relayCount++; // increase number of relays assigned a sequence number
    }
  }

  Serial.print("Cycle ");
  Serial.print(cycleNumber);
  Serial.print("C: Target sequence: ");
  for (i = 0; i < relayTotal; i++) { // display relay sequence - not activated (0)
    Serial.print(relayNumber[i]);
    Serial.print(" ");
  }
  Serial.println();
}

void activateSequence() {
  for (i = 0; i < relayTotal; i++) {
    activationTime = random (5, 10); // random delay - 5 to 10 seconds

    Serial.print("Cycle ");
    Serial.print(cycleNumber);
    Serial.print("D: Target:");
    if (relayNumber[i] < 10) // single digit number
      Serial.print(" "); // add space padding
    Serial.print(relayNumber[i]);
    Serial.print(" Delay:");
    if (activationTime) // single digit number
      Serial.print(" "); // add space padding
    Serial.print(activationTime);
    Serial.print(" ");
    Serial.print("ON");

    digitalWrite(relayPins[relayNumber[i]], HIGH); // activate relay in sequence
    delay(activationTime * timer); // delay before next relay activation
    digitalWrite(relayPins[relayNumber[i]], LOW); // deactivate relay

    delay(random(15, 20)); // delay 15 to 20 seconds between target activation
    Serial.println("...off");
  }
}

void activateAllRelays() {
  Serial.print("Cycle ");
  Serial.print(cycleNumber);
  Serial.println("E: Press button to activate all relays to retrieve arrows.");
  while (digitalRead(buttonPin)) {/* do nothing */} // wait for LOW from button press
  for (i = 0; i < relayTotal; i++)
    digitalWrite(relayPins[i], HIGH); // activate relay in sequence
  delay(150); // debounce the button

  Serial.print("Cycle ");
  Serial.print(cycleNumber);
  Serial.println("F: Press button to deactivate targets.");
  while (digitalRead(buttonPin)) {/* do nothing */} // wait for LOW from button press
  delay(150); // debounce the button
}