use std::path::PathBuf;

use anyhow::Result;
use clap::{Args, Subcommand};

#[derive(Args)]
pub struct TestArgs {
    #[command(subcommand)]
    pub cmd: TestCmd,
}

#[derive(Subcommand)]
pub enum TestCmd {
    /// Run end-to-end baggage propagation test across all live services.
    ///
    /// Stamps a unique test-id into W3C baggage, drives a cross-service call,
    /// then queries zradar to verify the request traversed all expected services.
    /// Requires all services running and zradar accessible.
    E2e(E2eArgs),
}

#[derive(Args)]
pub struct E2eArgs {
    /// Target environment to test against.
    #[arg(long, env = "TONIN_ENV", default_value = "dev")]
    pub env: String,

    /// Workspace root.
    #[arg(long)]
    pub workspace: Option<PathBuf>,

    /// zradar query endpoint (default: http://localhost:8081).
    #[arg(long, default_value = "http://localhost:8081")]
    pub zradar: String,

    /// Entry-point service URL to drive the cross-service call through.
    #[arg(long, default_value = "http://localhost:7001")]
    pub entry: String,

    /// How long to poll zradar for the trace before declaring failure (seconds).
    #[arg(long, default_value = "30")]
    pub timeout_secs: u64,
}

pub fn run(args: TestArgs) -> Result<()> {
    match args.cmd {
        TestCmd::E2e(e2e) => run_e2e(e2e),
    }
}

fn run_e2e(args: E2eArgs) -> Result<()> {
    // M4 implementation: stamp test-id baggage, drive cross-service call,
    // poll zradar QueryTraces, assert traversal.
    println!(
        "tonin test e2e — env={} entry={} zradar={}",
        args.env, args.entry, args.zradar
    );
    println!("Not yet implemented — wired as stub for CLI contract stability.");
    println!("Implementation lands in M4 once zradar baggage converter is complete.");
    Ok(())
}
