use serenity::{
    framework::standard::{macros::command, Args, CommandError, CommandResult},
    model::channel::Message,
    prelude::*,
};

// brainfuck interpreter
#[command]
#[aliases("bf", "brainfrick")]
fn brainfuck(ctx: &mut Context, message: &Message, args: Args) -> CommandResult {
    use brainfrick::Brainfuck;

    let input = match args.rest().trim() {
        "" => {
            return Err(CommandError(s!("Called without input!")));
        }
        v @ _ => v,
    };
    let output = Brainfuck::execute(input);

    match output {
        Ok(v) => {
            let _ = message.channel_id.send_message(&ctx.http, |m| {
                m.embed(|e| {
                    e.title("Brainfuck interpreter")
                        .description(format!(
                            "Input\n```brainfuck\n{}\n```\nOutput:\n```{}\n```",
                            input, v
                        ))
                        .author(|a| {
                            a.name(&message.author.name)
                                .icon_url(message.author.avatar_url().unwrap())
                        })
                        .colour(0xffd1dc)
                })
            });
        }
        Err(err) => {
            let _ = message.channel_id.send_message(&ctx.http, |m| {
                m.embed(|e| {
                    e.title("Brainfuck interpreter")
                        .description(format!("Error at:\n```\n{}:{}\n```", err.line(), err.col()))
                        .author(|a| {
                            a.name(&message.author.name)
                                .icon_url(message.author.avatar_url().unwrap())
                        })
                        .colour(0xff6961)
                })
            });
        }
    }

    Ok(())
}