fibonacci_sequence 0.1.1

use std::env;
use std::io;
mod lib;

fn main() {
    let args: Vec<String> = env::args().collect();
    if args.len() > 1 {
        dbg!("TERMINAL MODE");
        print!("开始计算命令行输入数字对应的斐波那契数列值");
        let args = match get_args(&args) {
            Ok(l) => l,
            Err(_) => Vec::new(),
        };
        for arg in args {
            let arg: u8 = arg
                .trim()
                .parse()
                .expect("Cannot exchange nums from terminal input into u8");
            println!("{}", lib::lib_fibonacci::kernel(arg).fib_value);
        }
    } else {
        dbg!("CLI MODE");
        loop {
            let input_char = get_input();
            let input_char: u8 = match input_char.trim().parse() {
                Ok(num) => num,
                Err(_) => {
                    println!("请输入在0-180之内的无符号数字!");
                    13
                }
            };
            if input_char == 13 {
                break;
            }
            println!("{}", lib::lib_fibonacci::kernel(input_char).fib_value);
        }
    }
}
/// This func is used to get the options from the terminal
/// It will ignore the first path object
/// # Examples
/// ```
/// use std::env;
/// let args:Vec<String> = env::args();
/// get_args(&args)
/// ```
fn get_args(args: &Vec<String>) -> Result<Vec<String>, &'static str> {
    if args.len() < 2 {
        return Err("Need More Options");
    }
    let mut other_keyboard_inputs = Vec::new();
    let mut index = 0;
    for item in args {
        if index < 1 {
            index += 1;
            continue;
        }
        other_keyboard_inputs.push(item.clone());
    }
    Ok(other_keyboard_inputs)
}
/// This func will get inputs from the cli userface
/// # Example
/// ```
/// let input_char = get_input();
/// let input_char: u8 = match input_char.trim().parse() {
///     Ok(num) => num,
///    Err(_) => {
///        println!("Err");
///        13
///    }
/// };
/// ```
fn get_input() -> String {
    println!("This is a programme aim to calculate Fibonacci sequence");
    let mut input_char: String = String::new();
    io::stdin()
        .read_line(&mut input_char)
        .expect("Eorror Occurred");
    input_char
}