// Copyright 2017 rust-ipfs-api Developers
// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.
//

use clap::App;
use command::CliCommand;
use futures::Future;
use ipfs_api::response::CommandsResponse;

fn recursive_print_commands(cmd: CommandsResponse, stack: &mut Vec<String>) {
    if cmd.subcommands.is_empty() {
        println!("  {} {}", stack.join(" "), cmd.name);
    } else {
        let (name, subcommands) = (cmd.name, cmd.subcommands);

        stack.push(name);

        for subcommand in subcommands {
            recursive_print_commands(subcommand, stack);
        }

        stack.pop();
    }
}

pub struct Command;

impl CliCommand for Command {
    const NAME: &'static str = "commands";

    fn signature<'a, 'b>() -> App<'a, 'b> {
        clap_app!(
            @subcommand commands =>
                (about: "List all available commands")
        )
    }

    handle!(
        (_args, client) => {
            client.commands().map(|commands| {
                println!();
                recursive_print_commands(commands, &mut Vec::new());
                println!();
            })
        }
    );
}