#include <Adafruit_NeoPixel.h>//Import the library for the ColorLED.
#include <stdint.h>

#define DEBUG 0

#define LEDMATRIX_PIN A0
#define MIC_PIN A2
#define TOUCH_PIN 6

#define NUMPIXELS 6

//This determines the noise loudness values to ignore and sets anything under it to 0
#define AMBIENT_THRESHOLD 20

//This sets the max noise loudness values
#define MAX_THRESHOLD 200

unsigned long debounce_time_milliseconds = 200;
unsigned long debounce_time_touch_pin = 0;

Adafruit_NeoPixel matrix = Adafruit_NeoPixel(NUMPIXELS, LEDMATRIX_PIN, NEO_GRB + NEO_KHZ800);

uint8_t current_selection = 0;
uint8_t current_selection_count = 7;

uint8_t color_matrix[9][3]  ={
  {1, 0, 0},
  {0, 1, 0},
  {0, 0, 1},
  {0, 1, 1},
  {1, 0, 1},
  {1, 1, 0},
  {1, 1, 1}
};


void setup() {
  Serial.begin(9600);
  // put your setup code here, to run once:
  pinMode(MIC_PIN, INPUT);
  pinMode(TOUCH_PIN, INPUT);

  matrix.begin();
  matrix.show();
}

void loop() {
  // put your main code here, to run repeatedly:

  //Check if touch button is pressed.
  if( !digitalRead(TOUCH_PIN ) 
      && 
      ((millis() - debounce_time_touch_pin ) > debounce_time_milliseconds)
  ){
    debounce_time_touch_pin = millis();

    //Change the current selection color by incrementing the value
    if(++current_selection >= current_selection_count){
      current_selection = 0;
    }   
  }

  //Read in the microphone value
  uint16_t mic_value = analogRead(MIC_PIN);

  if(DEBUG == 1){
    Serial.println(mic_value);
    delay(1);
  }
  
  //Check if the microphone value is under the ambient threshold, set mic value to 0 to ignore if it is under the threshold
  if(mic_value < AMBIENT_THRESHOLD){
    mic_value = 0;
  }
  //Check if the microphone value is over the max loudness threshold
  //If it is, set the microphone value to that threshold, this sets the max value for the microphone value
  if(mic_value > MAX_THRESHOLD){
    mic_value = MAX_THRESHOLD;
  }

  //Determine the brightness of the leds by using the map function
  uint8_t brightness = map(mic_value, 0, MAX_THRESHOLD, 0, 255);

  //Set, but not show, the color and brightness of all the LEDs in the LED Matrix
  for (uint16_t j = 0; j < NUMPIXELS; ++j) {
    matrix.setPixelColor(j, matrix.Color(color_matrix[current_selection][0] * brightness, color_matrix[current_selection][1] * brightness, color_matrix[current_selection][2] * brightness));
  }

  //Actually execute and show the set values on the LEDs
  matrix.show();

  
  delay(1);
}