use crate::{
    context::Context,
    opt::{self, Opt},
    vox, App,
};

pub type Handler = fn(&App, &Context, &[String]);

pub struct Command {
    pub name: String,
    pub commands: Vec<Command>,
    pub handler: Option<Handler>,
    pub opts: Vec<opt::Opt>,
}

impl Command {
    pub fn new<T: Into<String>>(name: T) -> Self {
        Command {
            name: name.into(),
            commands: vec![],
            handler: None,
            opts: vec![],
        }
    }

    pub fn handler(mut self, f: Handler) -> Self {
        self.handler = Some(f);
        self
    }

    pub fn opt(mut self, opt: Opt) -> Self {
        self.opts.push(opt);
        self
    }
}

pub fn help(app: &App, _ctx: &Context, _args: &[String]) {
    vox::print(app.application_header());
}