//! Integration tests for Hero Runner
//!
//! Tests the hero runner by spawning the binary and dispatching jobs to it.
//!
//! **IMPORTANT**: Run with `--test-threads=1` to ensure tests run sequentially:
//! ```
//! cargo test --test runner_hero -- --test-threads=1
//! ```

use hero_job::{Job, JobBuilder, JobStatus};
use hero_job_client::Client;
use std::sync::{Mutex, Once};
use std::process::Child;
use lazy_static::lazy_static;

/// Test configuration
const RUNNER_ID: &str = "test-hero-runner";
const REDIS_URL: &str = "redis://localhost:6379";

lazy_static! {
    static ref RUNNER_PROCESS: Mutex<Option<Child>> = Mutex::new(None);
}

/// Global initialization flag
static INIT: Once = Once::new();

/// Initialize and start the hero runner binary
async fn init_runner() {
    INIT.call_once(|| {
        // Register cleanup handler
        let _ = std::panic::catch_unwind(|| {
            ctrlc::set_handler(move || {
                cleanup_runner();
                std::process::exit(0);
            }).ok();
        });
        
        // Use escargot to build and get the binary path
        let binary = escargot::CargoBuild::new()
            .bin("herorunner")
            .package("runner-hero")
            .run()
            .expect("Failed to build hero runner binary");
        
        // Start the runner binary
        let child = binary
            .command()
            .args(&[
                RUNNER_ID,
                "--redis-url",
                REDIS_URL,
            ])
            .spawn()
            .expect("Failed to start hero runner");
        
        *RUNNER_PROCESS.lock().unwrap() = Some(child);
        
        // Wait for runner to be ready with TCP check
        use std::time::Duration;
        std::thread::sleep(Duration::from_secs(2));
        
        println!("✅ Hero runner ready");
    });
}

/// Cleanup runner process
fn cleanup_runner() {
    if let Ok(mut guard) = RUNNER_PROCESS.lock() {
        if let Some(mut child) = guard.take() {
            println!("🧹 Cleaning up hero runner process...");
            let _ = child.kill();
            let _ = child.wait();
        }
    }
}

/// Helper to create a test client
async fn create_client() -> Client {
    // Ensure runner is running
    init_runner().await;
    
    Client::builder()
        .redis_url(REDIS_URL)
        .build()
        .await
        .expect("Failed to create job client")
}

/// Helper to create a test job
fn create_test_job(payload: &str) -> Job {
    JobBuilder::new()
        .caller_id("test")
        .context_id("test-context")
        .payload(payload)
        .runner(RUNNER_ID)
        .timeout(30)
        .build()
        .expect("Failed to build job")
}

#[tokio::test]
async fn test_01_ping_job() {
    println!("\n🧪 Test: Ping Job");
    
    let client = create_client().await;
    
    // Create ping job
    let job = create_test_job("ping");
    let job_id = job.id.clone();
    
    // Save job to Redis
    client.store_job_in_redis(&job).await.expect("Failed to save job");
    
    // Queue job to runner
    client.job_run(&job_id, RUNNER_ID).await.expect("Failed to queue job");
    
    // Wait for job to complete
    tokio::time::sleep(tokio::time::Duration::from_secs(2)).await;
    
    // Check job status
    let status = client.get_status(&job_id).await.expect("Failed to get job status");
    assert_eq!(status, JobStatus::Finished, "Ping job should be finished");
    
    // Check result
    let result = client.get_result(&job_id).await.expect("Failed to get result");
    assert_eq!(result, Some("pong".to_string()), "Ping should return pong");
    
    println!("✅ Ping job completed successfully");
}

#[tokio::test]
async fn test_02_simple_heroscript() {
    println!("\n🧪 Test: Simple Heroscript");
    
    let client = create_client().await;
    
    // Create job with simple heroscript
    let job = create_test_job("print('Hello from hero runner')");
    let job_id = job.id.clone();
    
    // Save and queue job
    client.store_job_in_redis(&job).await.expect("Failed to save job");
    client.job_run(&job_id, RUNNER_ID).await.expect("Failed to queue job");
    
    // Wait for job to complete
    tokio::time::sleep(tokio::time::Duration::from_secs(5)).await;
    
    // Check job status
    let status = client.get_status(&job_id).await.expect("Failed to get job status");
    println!("Job status: {:?}", status);
    
    // Get result or error
    if let Some(result) = client.get_result(&job_id).await.expect("Failed to get result") {
        println!("Job result: {}", result);
    }
    if let Some(error) = client.get_error(&job_id).await.expect("Failed to get error") {
        println!("Job error: {}", error);
    }
    
    println!("✅ Heroscript job completed");
}

#[tokio::test]
async fn test_03_job_with_env_vars() {
    println!("\n🧪 Test: Job with Environment Variables");
    
    let client = create_client().await;
    
    // Create job with env vars
    let mut job = create_test_job("echo $TEST_VAR");
    job.env_vars.insert("TEST_VAR".to_string(), "test_value".to_string());
    let job_id = job.id.clone();
    
    // Save and queue job
    client.store_job_in_redis(&job).await.expect("Failed to save job");
    client.job_run(&job_id, RUNNER_ID).await.expect("Failed to queue job");
    
    // Wait for job to complete
    tokio::time::sleep(tokio::time::Duration::from_secs(5)).await;
    
    // Check job status
    let status = client.get_status(&job_id).await.expect("Failed to get job status");
    println!("Job status: {:?}", status);
    
    // Get result
    if let Some(result) = client.get_result(&job_id).await.expect("Failed to get result") {
        println!("Job result: {}", result);
    }
    
    println!("✅ Job with env vars completed");
}

#[tokio::test]
async fn test_04_job_timeout() {
    println!("\n🧪 Test: Job Timeout");
    
    let client = create_client().await;
    
    // Create job with short timeout
    let mut job = create_test_job("sleep 10");
    job.timeout = 2; // 2 second timeout
    let job_id = job.id.clone();
    
    // Save and queue job
    client.store_job_in_redis(&job).await.expect("Failed to save job");
    client.job_run(&job_id, RUNNER_ID).await.expect("Failed to queue job");
    
    // Wait for job to timeout
    tokio::time::sleep(tokio::time::Duration::from_secs(5)).await;
    
    // Check job status - should be error due to timeout
    let status = client.get_status(&job_id).await.expect("Failed to get job status");
    println!("Job status: {:?}", status);
    
    // Should have error
    if let Some(error) = client.get_error(&job_id).await.expect("Failed to get error") {
        println!("Job error (expected timeout): {}", error);
        assert!(error.contains("timeout") || error.contains("timed out"), "Error should mention timeout");
    }
    
    println!("✅ Job timeout handled correctly");
}

/// Final test that ensures cleanup happens
#[tokio::test]
async fn test_zz_cleanup() {
    println!("\n🧹 Running cleanup...");
    cleanup_runner();
    
    // Wait a bit to ensure process is killed
    tokio::time::sleep(tokio::time::Duration::from_millis(500)).await;
    
    println!("✅ Cleanup complete");
}