#include <TaskScheduler.h>

// TaskScheduler instance
Scheduler ts;

// Variables
bool ledActive = false;         // State of the LED
unsigned long ledOnTime = 0;    // Time when LED is turned on
int reactionTime = 0;           // Player's reaction time

// Task functions
void activateLED() {
    // Task to activate the LED
    ledActive = true;
    digitalWrite(LED_BUILTIN, HIGH);           // Turn on LED
    ledOnTime = millis();                      // Record activation time
    Serial.println("LED is ON! Press the button...");
}

void monitorButtonPress() {
    // Task to monitor button press
    if (ledActive && digitalRead(2) == LOW) {  // Button pressed
        unsigned long buttonPressTime = millis();
        reactionTime = buttonPressTime - ledOnTime; // Calculate reaction time
        ledActive = false;
        digitalWrite(LED_BUILTIN, LOW);       // Turn off LED
        Serial.print("Reaction Time: ");
        Serial.print(reactionTime);
        Serial.println(" ms");
        tActivateLED.enableDelayed(random(2000, 5000)); // Restart after a random delay
        tMonitorButton.disable();                      // Stop button monitoring until next game
    }
}

void resetGame() {
    // Task to reset the game by enabling button monitoring
    tMonitorButton.enable(); // Enable button monitoring
}

// Define tasks
Task tActivateLED(0, 1, &activateLED, &ts);            // Task to activate LED
Task tMonitorButton(50, TASK_FOREVER, &monitorButtonPress, &ts, false); // Task to monitor button presses

void setup() {
    pinMode(LED_BUILTIN, OUTPUT); // LED pin
    pinMode(2, INPUT_PULLUP);     // Button pin with pull-up resistor
    Serial.begin(9600);
    randomSeed(analogRead(A0));   // Seed random generator with analog noise

    // Start the game
    Serial.println("Reaction-Time Game Starting!");
    tActivateLED.enableDelayed(random(2000, 5000)); // Start LED task with random delay
}

void loop() {
    // Execute scheduled tasks
    ts.execute();
}