use std::process::ExitCode;

use clap::{Parser, Subcommand};
use mxgateway_client::{CLIENT_VERSION, GATEWAY_PROTOCOL_VERSION, WORKER_PROTOCOL_VERSION};
use serde_json::json;

#[derive(Debug, Parser)]
#[command(name = "mxgw")]
#[command(about = "MXAccess Gateway Rust test CLI")]
struct Cli {
    #[command(subcommand)]
    command: Command,
}

#[derive(Debug, Subcommand)]
enum Command {
    Version {
        #[arg(long)]
        json: bool,
    },
}

fn main() -> ExitCode {
    let cli = Cli::parse();
    run(cli);
    ExitCode::SUCCESS
}

fn run(cli: Cli) {
    match cli.command {
        Command::Version { json } => print_version(json),
    }
}

fn print_version(use_json: bool) {
    if use_json {
        println!(
            "{}",
            json!({
                "clientVersion": CLIENT_VERSION,
                "gatewayProtocolVersion": GATEWAY_PROTOCOL_VERSION,
                "workerProtocolVersion": WORKER_PROTOCOL_VERSION,
            })
        );
        return;
    }

    println!("mxgw {CLIENT_VERSION}");
    println!("gateway protocol {GATEWAY_PROTOCOL_VERSION}");
    println!("worker protocol {WORKER_PROTOCOL_VERSION}");
}

#[cfg(test)]
mod tests {
    use clap::Parser;

    use super::Cli;

    #[test]
    fn parses_version_json_command() {
        let parsed = Cli::try_parse_from(["mxgw", "version", "--json"]);
        assert!(parsed.is_ok());
    }
}