#include <SSD1306Ascii.h>
#include <SSD1306AsciiAvrI2c.h>
#include <JC_Button.h>

#define PIN_UP_BTN    2
#define PIN_DWN_BTN   3

// 0X3C+SA0 - 0x3C or 0x3D
#define I2C_ADDRESS 0x3C
SSD1306AsciiAvrI2c oled;
// Usare la lista di 24 font comporta errore per superamento spazio flash
// per questo c'è commented negli array.

const char* fontName[] = {
  /*"Arial14",
  "Arial_bold_14",
  "Callibri11",
  "Callibri11_bold",
  "Callibri11_italic",
  "Callibri15",
  "Corsiva_12",
  "fixed_bold10x15",
  "font5x7",
  "font8x8",
  "Iain5x7",
  "lcd5x7",
  "Stang5x7",
  "System5x7", commented */
  "TimesNewRoman16",
  "TimesNewRoman16_bold",
  "TimesNewRoman16_italic",
  "utf8font10x16",
  "Verdana12",
  "Verdana12_bold",
  "Verdana12_italic",
  "X11fixed7x14",
  "X11fixed7x14B",
  "ZevvPeep8x16" 
};

const uint8_t* fontList[] = {
  /*Arial14,
  Arial_bold_14,
  Callibri11,
  Callibri11_bold,
  Callibri11_italic,
  Callibri15,
  Corsiva_12,
  fixed_bold10x15,
  font5x7,
  font8x8,
  Iain5x7,
  lcd5x7,
  Stang5x7,
  System5x7,  commented */
  TimesNewRoman16,
  TimesNewRoman16_bold,
  TimesNewRoman16_italic,
  utf8font10x16,
  Verdana12,
  Verdana12_bold,
  Verdana12_italic,
  X11fixed7x14,
  X11fixed7x14B,
  ZevvPeep8x16
};

uint8_t nFont = sizeof(fontList)/sizeof(uint8_t*);
Button upBtn(PIN_UP_BTN);
Button dwnBtn(PIN_DWN_BTN);
uint8_t fontIndex = 0;
uint8_t oldFontIndex = nFont;

void setup() {
    upBtn.begin();
    dwnBtn.begin();
    Serial.begin(115200);
    
    oled.begin(&Adafruit128x64, I2C_ADDRESS);
    
    /*for (uint8_t i = 0; i < nFont; i++) {
        oled.setFont(System5x7);
        oled.clear();
        Serial.println(fontName[i]);
        //oled.println();  
        oled.setFont(fontList[i]);
        oled.println("*+,-./0123456789:");
        oled.println("abcdefghijklmno");
        oled.println("ABCDEFGHIJKLMNO");
        delay(1000);    
  }*/
  oled.clear();
  Serial.print("nFont = ");
  Serial.println(nFont);
   
}

void loop() {
    upBtn.read();   // pulsante verde SU
    dwnBtn.read();  // pulsante giallo GIU
    if (upBtn.wasPressed()) {
        if (fontIndex > 0)
            fontIndex--;
        //Serial.println(fontIndex);
    }
    if (dwnBtn.wasPressed()) {
        if (fontIndex < nFont-1)
            fontIndex++;
        //Serial.println(fontIndex);
    }
    if (oldFontIndex != fontIndex) {
        oldFontIndex = fontIndex;
        Serial.print(fontIndex);
        Serial.print("  ");
        Serial.println(fontName[fontIndex]);
        oled.clear();
        oled.setFont(fontList[fontIndex]);
        oled.println("*+,-./0123456789:");
        oled.println("abcdefghijklmno");
        oled.println("ABCDEFGHIJKLMNO");
    }

}