forgekey 1.0.0

A fast, minimal password generator CLI built in Rust.
Documentation 
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use clap::Parser;
use cli_clipboard::{ClipboardContext, ClipboardProvider};
use colored::Colorize;
use forgekey::{Cli, calculate_entropy, generate_passphrase, generate_password};

/// Prints a password with each character colored by its type.
fn print_colored(password: &str) {
    for ch in password.chars() {
        let colored_char = match ch {
            'A'..='Z' => ch.to_string().green(),
            '0'..='9' => ch.to_string().cyan(),
            'a'..='z' => ch.to_string().white(),
            _ => ch.to_string().yellow(),
        };
        print!("{colored_char}");
    }
    println!();
}

fn main() {
    let cli = Cli::parse();

    if cli.passphrase {
        for _ in 0..cli.number {
            match generate_passphrase(&cli) {
                Ok(passphrase) => {
                    println!("{}", passphrase);
                }
                Err(error) => {
                    eprintln!("{}", error);
                    std::process::exit(1)
                }
            }
        }
        return;
    }

    let mut passwords = Vec::new();
    let mut charset_size = 0;

    for _ in 0..cli.number {
        match generate_password(&cli) {
            // cs is charset_size comming from generate_password function
            Ok((password, cs)) => {
                print_colored(&password);
                passwords.push(password);
                charset_size = cs;
            }
            Err(error) => {
                eprintln!("{}", error);
                std::process::exit(1);
            }
        }
    }
    if cli.copy {
        match ClipboardProvider::new() {
            Ok(mut ctx) => match ClipboardContext::set_contents(&mut ctx, passwords.join("\n")) {
                Ok(_) => println!("Copied to clipboard!"),
                Err(e) => eprintln!("Failed to copy to clipboard: {e}"),
            },
            Err(e) => eprintln!("Clipboard unavailable: {e}"),
        }
    }
    if cli.strength {
        let (entropy, level) = calculate_entropy(cli.length, charset_size);

        let colored_level = match level {
            "weak" => level.to_string().red(),
            "fair" => level.to_string().yellow(),
            "strong" => level.to_string().cyan(),
            _ => level.to_string().green(),
        };
        println!("Strength: {} ({:.1} bits)", colored_level, entropy);
    }
}