// #include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#include "MCUFRIEND_kbv.h"

// For the Adafruit shield, these are the default.
#define TFT_DC 9
#define TFT_CS 10

// Use hardware SPI (on Uno, #13, #12, #11) and the above for CS/DC
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

// 565 COLOR
#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x03E0 // 0000 0.011 111.0 0000
#define LTGREEN 0x07E0 // 0000 0.111 111.0 0000
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF
#define DKGREY  0x4208 // 0100 0.010 000.0 1000
#define GREY    0x8410 // 1000 0.100 000.1 0000
#define LTGREY  0xC618 // 1100 0.110 000.1 1000

Adafruit_GFX_Button STARTx;
Adafruit_GFX_Button MODE_A;
Adafruit_GFX_Button MODE_B;
Adafruit_GFX_Button CUSTOM;

void setup() {
  Serial.begin(9600);
  Serial.println("Hello, ILI9341!");

  tft.begin();
  tft.setRotation(0); // 0 vertical / 1 horizontal

  // appleiie();
  c64();
  // setupDisplay();
  // changeTextSize();
  // changeTextColor();
  // extendedASCII();
}

void loop() { }

void extendedASCII() {
  int j = 0;
  for (int i = 127; i < 288; i++) {
    if (i < 100)
      tft.print(" ");
    if (i < 10)
      tft.print(" ");
    tft.print(i);
    tft.print("=");
    if (i == 266) // linefeed
      tft.print(" ");
    else
      tft.print(char(i));
    if (j++ == 5) {
      j = 0;
      tft.print("\n");
    } else {
      tft.print("  ");
    }
  }
}

void changeTextColor() {
  // https://forum.arduino.cc/t/all-colors-are-blue/1224764/4
  // tft.setTextColor(0xf800); // 565 red
  // tft.setTextColor(0x001f); // 565 blue
  // tft.setTextColor(0x0780); // 565 green
  tft.setTextColor(0xffff); // 565 white
  tft.setCursor(0, 0);
  tft.setTextSize(2);
  tft.print("setTextColor(0xffff)");
  tft.setCursor(20, 0);
  tft.setTextSize(2);
  for (long i = 0; i < 0x1f; i++) {
    for (long j = 0; j < 0x3f; j++) {
      for (long k = 0; k < 0x1f; k++) {
        tft.setCursor(0, 20);
        tft.setTextColor(i << 11 & j << 5 && k);
        tft.print("setTextColor()");
      }
    }
  }
}

void changeTextSize() {
  tft.setCursor(0, 0);
  tft.setTextSize(1);
  tft.print("setTextSize(1)");

  tft.setCursor(0, 25);
  tft.setTextSize(2);
  tft.print("Size = 2");

  tft.setCursor(0, 75);
  tft.setTextSize(3);
  tft.print("Size = 3");

  tft.setCursor(0, 150);
  tft.setTextSize(4);
  tft.print("Size = 4");

  tft.setCursor(0, 250);
  tft.setTextSize(5);
  tft.print("Size = 5");
}

void setupDisplay() {
  STARTx.initButton(&tft,  60, 205, 100, 70, WHITE, BLUE, BLACK, "START", 2);
  STARTx.drawButton(true);
  MODE_A.initButton(&tft,  60, 285, 100, 70, WHITE, RED, BLACK, "A", 2);
  MODE_A.drawButton(true);
  MODE_B.initButton(&tft, 175, 285, 100, 70, WHITE, GREEN, BLACK, "B", 2);
  MODE_B.drawButton(true);
  CUSTOM.initButton(&tft, 175, 205, 100, 70, WHITE, YELLOW, BLACK, "CUST", 2);
  CUSTOM.drawButton(true);
}

void c64() {
  tft.fillScreen(BLUE);
  tft.setTextColor(CYAN);
  tft.println("     **** COMMODORE 64 BASIC V2 ****");
  tft.println("  64k RAM SYSTEM 38911 BASIC BYTES FREE");
  tft.println("\n");
  tft.println("10 FOR A = 127 TO 288 STEP 1");
  tft.println("20 PRINT A; TAB(2)");
  tft.println("30 PRINT \"=\" ");
  tft.println("40 PRINT CHR$(A)");
  tft.println("50 NEXT");
  tft.println("\n");
}

void appleiie() {
  tft.fillScreen(0x4208); // dark grey 0100 0.010 000.0 1000
  tft.setTextColor(LTGREEN);
  tft.println("\n                  APPLE ][e\n");
  tft.println(" 10 FOR A = 127 TO 288 STEP 1");
  tft.println(" 20 PRINT A; TAB(2)");
  tft.println(" 30 PRINT \"=\" ");
  tft.println(" 40 PRINT CHR$(A)");
  tft.println(" 50 NEXT");
  tft.println("\n");
}