#include <Wire.h>
#include <SPI.h>

#define red 3
#define green 6
#define blue 5
#define CS 10
#define INT 9

#define CHANNEL 1 //Channel for i2c

int pad[5] = {A1,A2,A3,A0,A6};

// function that executes whenever data is received from master
// this function is registered as an event, see setup()

int request = 0;
byte r = 0;
byte g = 0;
byte b = 0;

void i2cEvent(int howMany)
{
  if (Wire.available()) // loop through all but the last
  {
    byte var = Wire.read(); // receive byte as a character
    request = var;
//    Serial.println(var);
    switch (var) 
      {
        
        case 1:
        
          break;
        case 2:
          r = Wire.read();
          g = Wire.read();
          b = Wire.read();
          rgbWrite(r, g, b);
          break;
        case 3:

          break;
        case 4:
          
          break;
        case 5:
        
          break;
//        default: 
//          // si nada coincide, ejecuta el "default"
//          // el "default" es opcional
      }
  }
}

byte value[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
uint16_t temp_value = 0;
void requestEvent()
{
//  Wire.write("hello pepe"); // respond with message of 6 bytes
  if (request==1)
    {
      for (int i=0; i<10; i=i+2)
         {
           temp_value = analogRead(pad[i/2]);
           value[i] = (char)(temp_value&(0x00FF));
           value[i + 1] = (char)((temp_value>>8)&(0x00FF));
//           Wire.write((byte)(value&(0x00FF)));
//           Wire.write((byte)((value>>8)&(0x00FF)));    
         }
       Wire.write(value,10);
       digitalWrite(INT, HIGH);
    }
}

void redWrite(byte color)
  {
    analogWrite(red, map(color, 0, 255, 255, 0));
  }
  
void blueWrite(byte color)
  {
    analogWrite(blue, map(color, 0, 255, 255, 0));
  }
 
void greenWrite(byte color)
  {
    analogWrite(green, map(color, 0, 255, 255, 0));
  }
  
void rgbWrite(byte red_color, byte green_color, byte blue_color)
  {
    redWrite(red_color);
    blueWrite(blue_color);
    greenWrite(green_color);
  }

uint16_t  Sensor[5] = {0, 0, 0, 0, 0};
uint16_t  Sensor_ant[5] = {0, 0, 0, 0, 0};

void setup() {
  pinMode(green, OUTPUT);
  pinMode(blue, OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(INT, OUTPUT);
  digitalWrite(INT, LOW);
  rgbWrite(0, 0, 0);
  Serial.begin(57600);
  Wire.begin(CHANNEL);      // join i2c bus with address #4 
  pinMode (CS, INPUT);
  SPI.begin();  
  Wire.onReceive(i2cEvent); // register event
  Wire.onRequest(requestEvent); // register event
  for (int i=0; i<5; i++)
    {
      Sensor[i] = analogRead(pad[i]);
      Sensor_ant[i] = Sensor[i];
    }
}

int intensidad = 0;


uint16_t temp_sensor = 0;
uint16_t res = 4;

void loop() {
//  for (int i=0; i<5; i++)
//    {
//      Sensor[i] = analogRead(pad[i]);
//      if ((Sensor[i]>=(Sensor_ant[i] + res))||(Sensor[i]<=(Sensor_ant[i] - res))) 
//        {
//          digitalWrite(INT, LOW);
//        }
//      Sensor_ant[i] = Sensor[i];
//    }



  intensidad = analogRead(pad[4]);
  rgbWrite(map(intensidad,0,1023,255,0),map(intensidad,0,1023,255,0),map(intensidad,0,1023,150,0));

  if (intensidad<(1023/3))
   {
     redWrite(map(intensidad,0,1023/3,255,0));
     greenWrite(0);
     blueWrite(0);
   }
  else if (intensidad<(2*1023/3)) 
    {
      greenWrite(map(intensidad,1023/3,2*1023/3,255,0));
      redWrite(0);
      blueWrite(0);
    }
  else if (intensidad<=1023) 
    {
      greenWrite(0);
      redWrite(0);
      blueWrite(map(intensidad,2*1023/3,1023,255,0));
    }
  
// delay(10);
 for (int i=0; i<5; i++)
   {
     Serial.print(analogRead(pad[i])*(3300/1023.));
     Serial.print(' ');
   }
 Serial.println(' ');
}