#include <Ewma.h>
#include <EwmaT.h>
#include "MIDIUSB.h"

#define CC_ONE_PIN 14
#define LED_PIN 8
#define BTN_PIN 5

EwmaT <int> filter(10, 100);
int ccOneVal = 0;
int ccNumOffset = 0;
int btnVal;

void setup() {
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BTN_PIN, INPUT_PULLUP);
}

// First parameter is the event type (0x0B = control change).
// Second parameter is the event type, combined with the channel.
// Third parameter is the control number number (0-119).
// Fourth parameter is the control value (0-127).

void controlChange(uint8_t channel, uint8_t control, uint8_t value) {
  midiEventPacket_t event = {0x0B, 0xB0 | channel, control, value};
  MidiUSB.sendMIDI(event);
}

void loop() {
  ccOneVal = analogRead(CC_ONE_PIN);
  btnVal = digitalRead(BTN_PIN);

  if(btnVal == LOW){
    analogWrite(LED_PIN, 150);
    ccNumOffset = 10;
  }else{
    analogWrite(LED_PIN, 0);
    ccNumOffset = 0;
  }
  
  int ccOneValFiltered = filter.filter(ccOneVal);
  Serial.print(0);
  Serial.print(',');
  Serial.print(1023);
  Serial.print(',');
  Serial.print(ccOneVal);
  Serial.print(',');
  Serial.println(ccOneValFiltered);

  uint8_t ccOneOutput = map(ccOneValFiltered, 0, 1023, 0, 127);
  controlChange(0, 10 + ccNumOffset, ccOneOutput); // Set the value of controller 10 on channel 0 to 65
  MidiUSB.flush();
  delay(10);
}