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//! A simple CLI tool to display information about the provided input.
//!
//! # Installation
//! ```console
//! $ cargo install b0x
//! ```
//!
//! # Usage
//! While you can't see it below, it prints everything in color.
//!
//! #### Numbers
//! Supported formats:
//! - Decimal: `42`
//! - Binary: `0b101010`
//! - Octal: `0o52`
//! - Hexadecimal: `0x2A`
//!
//! ```console
//! $ b0x 0xC0FFEE
//! found u128(12648430)
//! ➔ radix
//!    bin 110000001111111111101110
//!      ├ ones 16
//!      ├ zeros 8 (112)
//!      ├ leading zeros 104
//!      └ trailing zeros 1
//!    oct 60177756
//!    dec 12648430
//!    hex c0ffee
//!    HEX C0FFEE
//! ➔ prime
//!    prime? false
//! ➔ misc
//!    perfect a^k 12648430 ^ 1
//!    2^k? false
//!    next 2^k 16777216
//! ➔ english
//!    english "twelve million, six hundred and forty-eight thousand, four hundred and thirty"
//! ```
//!
//! #### Strings
//!
//! ```console
//! $ b0x "TeSt StRiNg"
//! found string(TeSt StRiNg)
//! ➔ structure
//!    ascii? true
//! ➔ graphemes
//!    array ["T", "e", "S", "t", " ", "S", "t", "R", "i", "N", "g"]
//!    len 11
//! ➔ words
//!    array ["TeSt", "StRiNg"]
//!    len 2
//! ➔ bytes
//!    array [84, 101, 83, 116, 32, 83, 116, 82, 105, 78, 103]
//!    len 11
//! ➔ modifications
//!    upper TEST STRING
//!    lower test string
//! ```

mod color;
pub mod config;
pub mod pass;

use crate::config::Config;

/// Try to parse a number which has a prefix which determines the radix,
/// and print information if successful.
fn try_prefix(input: &str, prefix: &str, radix: u32, config: &Config) -> bool {
    if input.starts_with(prefix) {
        let clean_input = input.replacen(prefix, "", 1);
        if let Ok(integer) = u128::from_str_radix(&clean_input, radix) {
            pass::integer::run(integer, config);
            return true;
        }
    }

    false
}

macro_rules! try_prefix_seq {
    {$input:expr, $config:expr, $ending:expr; $prefix:expr, $radix:expr, $($tail:tt)*} => {
        if !try_prefix($input, $prefix, $radix, $config) {
            try_prefix_seq! { $input, $config, $ending; $($tail)* }
        }
    };

    {$input:expr, $config:expr, $ending:expr;} => {
        $ending
    };
}

/// Given a `Config`, try to parse the input stored in it as a number and print information.
/// If the input can't be parsed as a `u128`, fall back to String.
pub fn run(config: Config) {
    let input = config.input();
    let input_trim = input.trim();

    try_prefix_seq! {
        input_trim, &config, match input_trim.parse::<u128>() {
            Ok(v) => pass::integer::run(v, &config),
            Err(_) => pass::string::run(input, &config),
        };

        "0b", 2, "0o", 8, "0x", 16,
    };
}