use log::error;
use serenity::framework::standard::{macros::command, Args, CommandResult};
use serenity::model::channel::Message;
use serenity::prelude::Context;

#[command]
async fn clap(ctx: &mut Context, msg: &Message, mut args: Args) -> CommandResult {
    let resp = match args
        .iter()
        .map(|arg: Result<String, _>| match arg {
            Ok(arg) => arg,
            Err(e) => {
                error!(
                    "Failed to cast clap arg to String; returning empty string instead: {:?}",
                    e
                );
                String::default()
            }
        })
        .collect::<Vec<_>>()
        .as_slice()
    {
        [] => ":clap:".to_string(),
        [_] => "You can't clap a single word."
            .split_whitespace()
            .collect::<Vec<_>>()
            .join(" :clap: "),
        args => args.join(" :clap: "),
    };

    msg.channel_id.say(ctx, resp).await?;
    Ok(())
}