#include <iostream>
#include <string>
#include<unistd.h>               // for linux

using namespace std;

const string COLOR_ANSI = "\033[38;2;";
int color[] = {255, 0, 0};
//bool incDec[] = {false, true, true};
int currentColor = 1;
int colorIterator = 0;

std::string updateColor() {
    if (colorIterator >= 255) {
        currentColor++;
        colorIterator = 0;
    }
    if (currentColor > 2) {
        currentColor = 0;
    }
    switch (currentColor) {
        case 0:
            if (color[0] < 255) {
                color[0]++;
            } 
            if (color[1] > 0) {
                color[1]--;
            }
            if (color[2] > 0) {
                color[2]--;
            }
            break;
        case 1:
            if (color[0] > 0) {
                color[0]--;
            } 
            if (color[1] < 255) {
                color[1]++;
            }
            if (color[2] > 0) {
                color[2]--;
            }
            break;
        case 2:
            if (color[0] > 0) {
                color[0]--;
            } 
            if (color[1] > 0) {
                color[1]--;
            }
            if (color[2] < 255) {
                color[2]++;
            }
            break;
        default:
            break;
            
    }
    
    colorIterator++;
    return COLOR_ANSI + std::to_string(color[0]) + ";" + std::to_string(color[1]) + ";" + std::to_string(color[2])+ "m";
}


int main() {
    //printf("Hello World!\n");
    std::system("clear");
    string input = "Scrolling text in C++! ";
    input += input;
    input += input;
    input += input;
    string colorStr = "";
    for (int i = 0;; ++i) {
                //printf("\033[H");
                //colorStr = updateColor();
                //printf ("RGB: %u, %u, %u; colorIterator: %u; currentColor: %u\n", color[0], color[1], color[2], colorIterator, currentColor);
                //printf("\n %d ", (i + 1));
                for (int j = 0; j < input.size() - 1; ++j) {
                    printf("%s%c", updateColor().c_str(), input.at(j));
                    //updateColor();
                }
                cout << "\n";
                //printf("%s %d %s\n", colorStr.c_str(), (i + 1), input.c_str());
                
                input = input.substr((input.size() - 1), input.size()) + input.substr(0, (input.size() - 1));
                usleep(100000);
                // Clear screen
                //std::system("clear");
    }
    return 0;
}