//! openfut-bridge-replay — replay a captured request file against the bridge.
//!
//! Usage:
//!   openfut-bridge-replay \<capture.json\> [bridge-url]
//!   openfut-bridge-replay captures/    (replay all captures in a dir)
//!
//! The bridge URL defaults to `http://127.0.0.1:8443`.
//! Self-signed TLS certificates are accepted automatically.

use openfut_bridge::capture::CapturedRequest;
use std::process::ExitCode;

#[tokio::main]
async fn main() -> ExitCode {
    let args: Vec<String> = std::env::args().collect();
    if args.len() < 2 {
        eprintln!("Usage: openfut-bridge-replay <capture.json|dir> [bridge-url]");
        eprintln!("  bridge-url defaults to http://127.0.0.1:8443");
        return ExitCode::FAILURE;
    }

    let path_arg = &args[1];
    let bridge_url = args
        .get(2)
        .map(|s| s.as_str())
        .unwrap_or("http://127.0.0.1:8443");

    let client = match reqwest::Client::builder()
        .danger_accept_invalid_certs(true)
        .timeout(std::time::Duration::from_secs(10))
        .build()
    {
        Ok(c) => c,
        Err(e) => {
            eprintln!("Failed to build HTTP client: {e}");
            return ExitCode::FAILURE;
        }
    };

    let captures = match collect_captures(path_arg) {
        Ok(c) => c,
        Err(e) => {
            eprintln!("Error loading captures: {e}");
            return ExitCode::FAILURE;
        }
    };

    if captures.is_empty() {
        eprintln!("No capture files found at {path_arg}");
        return ExitCode::FAILURE;
    }

    println!(
        "Replaying {} capture(s) against {bridge_url}",
        captures.len()
    );

    let mut failures = 0u32;
    for capture in &captures {
        let result = replay_one(&client, bridge_url, capture).await;
        match result {
            Ok(status) => println!("  [{}] {} {} → {status}", capture.id, capture.method, capture.path),
            Err(e) => {
                eprintln!("  [{}] {} {} → ERROR: {e}", capture.id, capture.method, capture.path);
                failures += 1;
            }
        }
    }

    if failures > 0 {
        eprintln!("{failures} replay(s) failed.");
        ExitCode::FAILURE
    } else {
        println!("All replays succeeded.");
        ExitCode::SUCCESS
    }
}

fn collect_captures(path_arg: &str) -> anyhow::Result<Vec<CapturedRequest>> {
    let path = std::path::Path::new(path_arg);
    if path.is_dir() {
        openfut_bridge::capture::load_all_captures(path_arg)
    } else {
        let content = std::fs::read_to_string(path)?;
        let capture: CapturedRequest = serde_json::from_str(&content)?;
        Ok(vec![capture])
    }
}

async fn replay_one(
    client: &reqwest::Client,
    bridge_url: &str,
    capture: &CapturedRequest,
) -> anyhow::Result<u16> {
    let url = format!("{}{}", bridge_url, capture.path);
    let builder = match capture.method.to_uppercase().as_str() {
        "POST" => client.post(&url),
        "PUT" => client.put(&url),
        "DELETE" => client.delete(&url),
        _ => client.get(&url),
    };

    let builder = if let Some(body) = &capture.body {
        builder
            .header("content-type", "application/json")
            .body(body.clone())
    } else {
        builder
    };

    let resp = builder.send().await?;
    Ok(resp.status().as_u16())
}