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use crate::api::console::Style;
use crate::api::process::ExitCode;
use crate::sys;

pub fn main(args: &[&str]) -> Result<(), ExitCode> {
    if args.len() == 1 {
        help();
        return Err(ExitCode::UsageError);
    }
    match args[1] {
        "set" => {
            if args.len() == 2 {
                error!("Keyboard layout missing");
                Err(ExitCode::Failure)
            } else {
                let layout = args[2];
                if sys::keyboard::set_keyboard(layout) {
                    Ok(())
                } else {
                    error!("Unknown keyboard layout");
                    Err(ExitCode::Failure)
                }
            }
        }
        "-h" | "--help" | "help" => {
            help();
            Ok(())
        }
        _ => {
            error!("Invalid command");
            Err(ExitCode::Failure)
        }
    }
}

fn help() {
    let csi_option = Style::color("aqua");
    let csi_title = Style::color("yellow");
    let csi_reset = Style::reset();
    println!(
        "{}Usage:{} keyboard {}<command>{}",
        csi_title, csi_reset, csi_option, csi_reset
    );
    println!();
    println!("{}Commands:{}", csi_title, csi_reset);
    println!(
        "  {0}set <layout>{1}    Set keyboard layout",
        csi_option, csi_reset
    );
}