#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>

// set to 1 if we are implementing the user interface pot, switch, etc
#define USE_UI_CONTROL 0

#if USE_UI_CONTROL
#include <MD_UISwitch.h>
#endif

// Turn on debug statements to the serial output
#define DEBUG 0

#if DEBUG
#define PRINT(s, x) { Serial.print(F(s)); Serial.print(x); }
#define PRINTS(x) Serial.print(F(x))
#define PRINTX(x) Serial.println(x, HEX)
5#else
#define PRINT(s, x)
#define PRINTS(x)
#define PRINTX(x)
#endif

// Define the number of devices we have in the chain and the hardware interface
// NOTE: These pin numbers will probably not work with your hardware and may
// need to be adapted
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES 4
#define CLK_PIN   13
#define DATA_PIN  11
#define CS_PIN    10

// HARDWARE SPI
MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
// SOFTWARE SPI
//MD_Parola P = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

// Scrolling parameters
#if USE_UI_CONTROL
const uint8_t SPEED_IN = A5;
const uint8_t DIRECTION_SET = 8;  // change the effect
const uint8_t INVERT_SET = 9;     // change the invert

const uint8_t SPEED_DEADBAND = 5;
#endif // USE_UI_CONTROL

uint8_t scrollSpeed = 90;    // default frame delay value
textEffect_t scrollEffect = PA_SCROLL_LEFT;
textPosition_t scrollAlign = PA_LEFT;
uint16_t scrollPause = 100; // in milliseconds

// Global message buffers shared by Serial and Scrolling functions
#define	BUF_SIZE	75
char curMessage[BUF_SIZE] = { " " };
char newMessage[BUF_SIZE] = { " JAY " };
bool newMessageAvailable = true;

#if USE_UI_CONTROL

MD_UISwitch_Digital uiDirection(DIRECTION_SET);
MD_UISwitch_Digital uiInvert(INVERT_SET);

void doUI(void)
{
  // set the speed if it has changed
    {
        int16_t speed = map(analogRead(SPEED_IN), 0, 1023, 10, 150);

            if ((speed >= ((int16_t)P.getSpeed() + SPEED_DEADBAND)) ||
(speed <= ((int16_t)P.getSpeed() - SPEED_DEADBAND)))
                      {
                            P.setSpeed(speed);
                                  scrollSpeed = speed;
                                        PRINT("\nChanged speed to ", P.getSpeed());
                                            }
                                              }

                                                if (uiDirection.read() == MD_UISwitch::KEY_PRESS) // SCROLL DIRECTION
                                                  {
                                                      PRINTS("\nChanging scroll direction");
                                                          scrollEffect = (scrollEffect == PA_SCROLL_LEFT ? PA_SCROLL_RIGHT : PA_SCROLL_LEFT);
                                                              P.setTextEffect(scrollEffect, scrollEffect);
                                                                  P.displayClear();
                                                                      P.displayReset();
                                                                        }

                                                                          if (uiInvert.read() == MD_UISwitch::KEY_PRESS)  // INVERT MODE
                                                                            {
                                                                                PRINTS("\nChanging invert mode");
                                                                                    P.setInvert(!P.getInvert());
                                                                                      }
                                                                                      }
                                                                                      #endif // USE_UI_CONTROL

                                                                                      void readSerial(void)
                                                                                      {
                                                                                        static char *cp = newMessage;

                                                                                          while (Serial.available())
                                                                                            {
                                                                                                *cp = (char)Serial.read();
                                                                                                    if ((*cp == '\n') || (cp - newMessage >= BUF_SIZE-2)) // end of message character or full buffer
                                                                                                        {
                                                                                                              *cp = '\0'; // end the string
                                                                                                                    // restart the index for next filling spree and flag we have a message waiting
                                                                                                                          cp = newMessage;
                                                                                                                                newMessageAvailable = true;
                                                                                                                                    }
                                                                                                                                        else  // move char pointer to next position
                                                                                                                                              cp++;
                                                                                                                                                }
                                                                                                                                                }

                                                                                                                                                void setup()
                                                                                                                                                {
                                                                                                                                                  Serial.begin(9600);
                                                                                                                                                    Serial.print("\n[Parola Scrolling Display]\nType a message for the scrolling display\nEnd message line with a newline");

                                                                                                                                                    #if USE_UI_CONTROL
                                                                                                                                                      uiDirection.begin();
                                                                                                                                                        uiInvert.begin();
                                                                                                                                                          pinMode(SPEED_IN, INPUT);

                                                                                                                                                            doUI();
                                                                                                                                                            #endif // USE_UI_CONTROL

                                                                                                                                                              P.begin();
                                                                                                                                                                P.displayText(curMessage, scrollAlign, scrollSpeed, scrollPause, scrollEffect, scrollEffect);
                                                                                                                                                                }

                                                                                                                                                                void loop()
                                                                                                                                                                {
                                                                                                                                                                #if USE_UI_CONTROL
                                                                                                                                                                  doUI();
                                                                                                                                                                  #endif // USE_UI_CONTROL

                                                                                                                                                                    if (P.displayAnimate())
                                                                                                                                                                      {
                                                                                                                                                                          if (newMessageAvailable)
                                                                                                                                                                              {
                                                                                                                                                                                    strcpy(curMessage, newMessage);
                                                                                                                                                                                          newMessageAvailable = false;
                                                                                                                                                                                              }
                                                                                                                                                                                                  P.displayReset();
                                                                                                                                                                                                    }
                                                                                                                                                                                                      readSerial();
                                                                                                                                                                                                      }