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

use hero_job::{Job, JobBuilder};
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-sal-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 SAL 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);
            }).expect("Error setting Ctrl-C handler");
        });

        println!("🚀 Starting SAL runner...");
        
        // Build the runner binary
        let build_result = escargot::CargoBuild::new()
            .bin("runner_sal")
            .package("runner-sal")
            .current_release()
            .run()
            .expect("Failed to build runner_sal");

        // Spawn the runner process
        let child = build_result
            .command()
            .arg(RUNNER_ID)
            .arg("--redis-url")
            .arg(REDIS_URL)
            .arg("--db-path")
            .arg("/tmp/test_sal.db")
            .spawn()
            .expect("Failed to spawn SAL runner");

        *RUNNER_PROCESS.lock().unwrap() = Some(child);
        
        // Give the runner time to start
        std::thread::sleep(std::time::Duration::from_secs(2));
        println!("✅ SAL runner ready");
    });
}

/// Cleanup runner process
fn cleanup_runner() {
    println!("🧹 Cleaning up SAL runner process...");
    if let Some(mut child) = RUNNER_PROCESS.lock().unwrap().take() {
        let _ = child.kill();
        let _ = child.wait();
    }
    // Clean up test database
    let _ = std::fs::remove_file("/tmp/test_sal.db");
}

/// Create a test job client
async fn create_client() -> Client {
    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-caller")
        .context_id("test-context")
        .runner(RUNNER_ID)
        .payload(payload)
        .timeout(30)
        .build()
        .expect("Failed to build test job")
}

#[tokio::test]
async fn test_01_simple_rhai_script() {
    println!("\n🧪 Test: Simple Rhai Script");
    
    let client = create_client().await;
    
    // Create job with simple Rhai script
    let job = create_test_job(r#"
let message = "Hello from SAL";
print(message);
message
"#);
    let job_id = job.id.clone();
    
    // Save and queue job
    match client.job_run_wait(&job, RUNNER_ID, 5).await {
        Ok(result) => {
            println!("✅ Job succeeded with result:\n{}", result);
            assert!(result.contains("Hello from SAL") || result.contains("SAL"), "Result should contain message");
        }
        Err(e) => {
            println!("❌ Job failed with error: {:?}", e);
            panic!("Job execution failed");
        }
    }
    
    println!("✅ Rhai script job completed");
}

#[tokio::test]
async fn test_02_rhai_array_operations() {
    println!("\n🧪 Test: Rhai Array Operations");
    
    let client = create_client().await;
    
    // Create job with array operations
    let job = create_test_job(r#"
let arr = [1, 2, 3, 4, 5];
let sum = 0;
for item in arr {
    sum += item;
}
print("Sum: " + sum);
sum
"#);
    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
    match (client.get_result(&job_id).await, client.get_error(&job_id).await) {
        (Ok(Some(result)), _) => {
            println!("✅ Job succeeded with result:\n{}", result);
            assert!(result.contains("15") || result.contains("Sum"), "Result should contain sum of 15");
        }
        (_, Ok(Some(error))) => {
            println!("❌ Job failed with error:\n{}", error);
            panic!("Job should have succeeded");
        }
        _ => {
            println!("⚠️  No result or error available");
            panic!("Expected result");
        }
    }
    
    println!("✅ Array operations job completed");
}

#[tokio::test]
async fn test_03_rhai_object_operations() {
    println!("\n🧪 Test: Rhai Object Operations");
    
    let client = create_client().await;
    
    // Create job with object/map operations
    let job = create_test_job(r#"
let obj = #{
    name: "Test",
    value: 42,
    active: true
};
print("Name: " + obj.name);
print("Value: " + obj.value);
obj.value
"#);
    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
    match (client.get_result(&job_id).await, client.get_error(&job_id).await) {
        (Ok(Some(result)), _) => {
            println!("✅ Job succeeded with result:\n{}", result);
            assert!(result.contains("42"), "Result should contain value 42");
        }
        (_, Ok(Some(error))) => {
            println!("❌ Job failed with error:\n{}", error);
            panic!("Job should have succeeded");
        }
        _ => {
            println!("⚠️  No result or error available");
            panic!("Expected result");
        }
    }
    
    println!("✅ Object operations job completed");
}

#[tokio::test]
async fn test_04_invalid_rhai_syntax() {
    println!("\n🧪 Test: Invalid Rhai Syntax Error Handling");
    
    let client = create_client().await;
    
    // Create job with invalid Rhai syntax
    let job = create_test_job("fn broken( { // Invalid syntax");
    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 - should be error
    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):\n{}", error);
        println!("✅ Invalid Rhai syntax error handled correctly");
    } else {
        println!("⚠️  Expected error for invalid Rhai syntax but got none");
        panic!("Job with invalid syntax should have failed");
    }
}

/// 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");
}