use std::ffi::OsString;

use lexopt::prelude::*;

#[derive(Debug, Default)]
pub(crate) struct Args {
    pub(crate) version: bool,
    pub(crate) clear_screen: bool,

    ///Pass the 'color' argument to the nmstermio module where it will set the
    ///foreground color of the unencrypted characters as they are
    ///revealed. Valid arguments are "white", "yellow", "magenta", "blue",
    ///"green", "red", and "cyan".
    pub(crate) foreground: Option<OsString>,

    /// Set the autoDecrypt flag according to the true/false value of the
    /// 'setting' argument. When set to true, nmseffect_exec() will not
    /// require a key press to start the decryption effect.
    pub(crate) autodecrypt: bool,

    /// Set the maskBlank flag according to the true/false value of the
    /// 'setting' argument. When set to true, blank spaces characters
    /// will be masked as well.
    pub(crate) mask_blanks: bool,
}

pub(crate) fn parse_arguments() -> Result<Args, lexopt::Error> {
    let mut parser = lexopt::Parser::from_env();

    let mut args = Args::default();

    while let Some(arg) = parser.next()? {
        match arg {
            Short('a') => {
                args.autodecrypt = true;
            }
            Short('c') => {
                args.clear_screen = true;
            }
            Short('f') => {
                let foreground = parser.value()?;
                args.foreground = Some(foreground);
            }
            Short('s') => {
                args.mask_blanks = true;
            }
            Short('v') => {
                args.version = true;
            }
            _ => return Err(arg.unexpected()),
        }
    }

    Ok(args)
}