#include "Particle.h"
#include <neopixel.h>

SYSTEM_MODE(AUTOMATIC);

// Pin assignments
int ledPin = D1;         // LED pin
int buttonPin = D3;      // Pushbutton pin

// NeoPixel setup
#define PIXEL_PIN SPI
#define PIXEL_COUNT 8
#define PIXEL_TYPE WS2812B

Adafruit_NeoPixel strip(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

// Prototypes for local build, ok to leave in for Build IDE
void cyclePixels(uint8_t wait);
int startMeeting(String command); // Cloud function to start the meeting (change to red)
void fadeToRed();                // Function to fade pixels to red

unsigned long buttonPressTime = 0;  // Keep track of how long the button is pressed
bool stripActive = true;            // To track if the strip is active or dismissed
bool buttonPressed = false;         // To track if the button was already pressed

void setup() {
    pinMode(buttonPin, INPUT_PULLUP);  // Button input with pull-up
    pinMode(ledPin, OUTPUT);           // LED output

    strip.begin();    // Initialize the NeoPixel strip
    strip.show();     // Initialize all pixels to 'off'

    Particle.function("startMeeting", startMeeting); // Register the function with Particle Cloud
    Serial.begin(9600);  // Start Serial Monitor for debugging
}

void loop() {
    // Check if the button is pressed
    int buttonState = digitalRead(buttonPin);

    if (buttonState == LOW) { // Button is pressed
        if (!buttonPressed) {
            buttonPressTime = millis();  // Start counting time when button is pressed
            buttonPressed = true;        // Mark button as pressed
        }

        // Check if the button has been pressed for 3 seconds
        if (millis() - buttonPressTime >= 3000) {
            // Toggle the stripActive state
            stripActive = !stripActive;
            buttonPressed = false;  // Reset button pressed state after toggle
            buttonPressTime = 0;    // Reset the timer

            // Update LED and NeoPixel based on the new stripActive state
            if (!stripActive) {
                strip.clear();        // Turn off all pixels
                strip.show();
                digitalWrite(ledPin, HIGH);  // Turn on LED when NeoPixel turns off
            } else {
                digitalWrite(ledPin, LOW);   // Turn off LED when NeoPixel turns on
                fadeToRed();  // Fade to red when the strip is active
            }
        }

    } else { // Button not pressed
        buttonPressTime = 0; // Reset the timer if button is released
        buttonPressed = false; // Reset button pressed state

        // Continue cycling pixels if the strip is active
        if (stripActive) {
            cyclePixels(500);  // Keep cycling the pixels if active
        }
    }
}

// Cloud function to change the color of the strip to red
int startMeeting(String command) {
    Serial.println("startMeeting function called");

    // Set all pixels to red
    for (int i = 0; i < strip.numPixels(); i++) {
        strip.setPixelColor(i, strip.Color(255, 0, 0)); // Red color
    }
    strip.show(); // Make sure the update is applied to the strip

    Serial.println("Color set to red");

    // Wait for 3 seconds (strip will stay red for this duration)
    delay(3000);

    // Reset the strip to its previous state (off in this case)
    strip.clear();  // Turn off all pixels
    strip.show();   // Update the strip

    Serial.println("Strip reset to off");

    return 0; // Return success
}

// Function to fade the NeoPixel strip to red gradually
void fadeToRed() {
    for (int i = 0; i < 256; i++) {  // Fade in red from 0 to 255
        for (int j = 0; j < strip.numPixels(); j++) {
            strip.setPixelColor(j, strip.Color(i, 0, 0));  // Gradually increase red
        }
        strip.show();
        delay(10);  // Delay to control the speed of the fade
    }
}

void cyclePixels(uint8_t wait) {
    static uint8_t pixelIndex = 0;  // Keep track of the pixel to light up

    // Turn off all pixels
    for (int i = 0; i < strip.numPixels(); i++) {
        strip.setPixelColor(i, 0);  // Set each pixel to off
    }

    // Light up the current pixel with green
    strip.setPixelColor(pixelIndex, strip.Color(0, 255, 0));  // Green color

    // Update the strip to show the change
    strip.show();

    // Wait for the specified time
    delay(wait);

    // Move to the next pixel. If we're at the last one, reset to the first.
    pixelIndex++;
    if (pixelIndex >= strip.numPixels()) {
        pixelIndex = 0;
    }
}