/*----------------*\
|Nanite OS         |
|Copyright (C) 2026|
|Xircon            |
\*----------------*/
#include "nanstd.h"

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

#include <dri/timer.h>

extern uint8_t _keyboard_scancode;

/*Prints a helpful or cool tip About the OS!*/
void printTip() {
    int number = rand() % 17;
    switch (number) {
        case 1: printf("Tip: The RD in the Version stands for Research and Development!\n"); break;
        case 2: printf("Tip: You can use Ctrl+Alt+Del to Reboot!\n"); break;
        case 3: printf("Tip: You can use Ctrl+Alt+ESC to Shutdown!\n"); break;
        case 4: printf("Tip: Nanite is under a modified BSD 3-Clause Licence!\n"); break;
        case 5: printf("Tip: Nanite is also supported on the ESP32 Dev Board!\n"); break;
        case 6: printf("Tip: The Serial Interface is at 9600 Baud by Default!\n"); break;
        case 7: printf("Tip: This is a hobby OS, worked on in the Author's Spare Time!\n"); break;
        case 8: printf("Tip: Nanite Has been Written By Xircon Since 2024!\n"); break;
        case 9: printf("Tip: Nanite has its own C std header, like unistd! Its called nanstd.h!\n"); break;
        case 10: printf("Tip: Nanite Can be built with a Different Keyboard Layout!\n"); break;
        case 11: printf("Tip: Nanite is and always will be Open Source Software!\n"); break;
        case 12: printf("Tip: The RD Versioning is in Reference to early Minecraft!\n"); break;
        case 13: printf("Tip: Nanite's nanstd.h has factorial support! (I like them!)\n"); break;
        case 14: printf("Tip: The Shell's Loading Spinner is just decor and can be removed!\n"); break;
        case 15: printf("Tip: Nanite is around 6000 lines of C and ASM as of Version RD-00127!\n"); break;
        case 16: printf("Tip: A Bug in the Keyboard Driver used to Allow RCtrl+RAlt to Reboot!\n"); break;
    }
    return;
}

/*Calculate Factorial of `N`*/
unsigned int factorial(unsigned int N) {
    int fact = 1, i;

    // Loop from 1 to N to get the factorial
    for (i = 1; i <= N; i++) {
        fact *= i;
    }

    return fact;
}

/*Prints A Little Spinning cursor*/
void spinner(int times) {
    int x, y;
    while (times >= 0) {
        printf("|");
        Timer_Wait(1);
        printf("\b");
        printf("/");
        Timer_Wait(1);
        printf("\b");
        printf("-");
        Timer_Wait(1);
        printf("\b");
        printf("\\");
        Timer_Wait(1);
        printf("\b");
        times--;
    }
    printf(" \b");
}