use crate::util;
use grate::tracing;

/// Roll some number of dice or perform a calculation.
#[poise::command(prefix_command, guild_only, aliases("calc", "calculate"))]
pub async fn roll<U: Send + Sync>(
    ctx: poise::Context<'_, U, anyhow::Error>,
    #[rest] rest: String,
) -> anyhow::Result<()> {
    match thulani_calc::Calc::eval(&rest) {
        Ok(result) => {
            tracing::debug!(result, expr = %rest, "got calc result");
            util::reply(ctx, result.to_string()).await?;
        },
        Err(e) => {
            tracing::error!(error = %e, expr = %rest, "error encountered reading calc");
            util::reply(ctx, "I COULDN'T READ THAT YOU FUCK").await?;
        },
    }

    Ok(())
}