use clap::{Parser, Subcommand};

use crate::game::debug::DebugEvent;

pub(super) fn respond(line: &str) -> Result<DebugEvent, String> {
    let might_be_help_call = line.contains("help") || line.contains("-h");
    let args = shlex::split(line).ok_or("Invalid Quoting")?;
    let cli = Cli::try_parse_from(args).map_err(|e| e.to_string());

    if might_be_help_call && cli.as_ref().is_err_and(|item| item.starts_with("Usage: ")) {
        let Err(s) = cli else { unreachable!() };
        return Ok(DebugEvent::PrintToConsole(s));
    }

    Ok(match cli?.cmd {
        Commands::Close => DebugEvent::CloseDebugConsole,
        Commands::Echo { text } => DebugEvent::PrintToConsole(text),
    })
}

#[derive(Debug, Parser)]
#[command(multicall = true)]
struct Cli {
    #[command(subcommand)]
    cmd: Commands,
}

#[derive(Debug, Subcommand)]
enum Commands {
    Close,
    Echo { text: String },
}