use std::fs;
use std::path::Path;
use std::time::Duration;
use tokio;
use tokio::sync::mpsc;
use tokio::time::{sleep, timeout};
use redis::AsyncCommands;

use actor_osis::spawn_osis_actor;
use hero_job::{Job, JobStatus, ScriptType};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Initialize logging
    // env_logger::init();
    hero_logger::init_system_logger("logs", &["osis_actor".to_string()]).unwrap();
    
    println!("=== OSIS Actor Redis Dispatch Example ===");
    
    // Find all Rhai scripts in examples/scripts directory
    let scripts_dir = Path::new("examples/scripts");
    if !scripts_dir.exists() {
        eprintln!("Scripts directory not found: {}", scripts_dir.display());
        return Ok(());
    }
    
    let mut script_files = Vec::new();
    for entry in fs::read_dir(scripts_dir)? {
        let entry = entry?;
        let path = entry.path();
        if path.extension().and_then(|s| s.to_str()) == Some("rhai") {
            script_files.push(path);
        }
    }
    
    script_files.sort();
    println!("Found {} Rhai scripts in {}", script_files.len(), scripts_dir.display());
    
    if script_files.is_empty() {
        println!("No Rhai scripts found. Exiting.");
        return Ok(());
    }
    
    // Create temporary database path
    let db_path = "temp_osis_actor_example_db";
    
    // Clean up previous database if it exists
    if Path::new(db_path).exists() {
        fs::remove_dir_all(db_path)?;
    }
    
    // Redis configuration
    let redis_url = "redis://127.0.0.1:6379";
    
    // Try to connect to Redis
    let redis_client = redis::Client::open(redis_url)?;
    let mut redis_conn = match redis_client.get_multiplexed_async_connection().await {
        Ok(conn) => {
            println!("Connected to Redis at {}", redis_url);
            conn
        }
        Err(e) => {
            println!("Failed to connect to Redis: {}", e);
            println!("Please ensure Redis is running on localhost:6379");
            println!("You can start Redis with: redis-server");
            return Err(e.into());
        }
    };
    
    // Create shutdown channel for the actor
    let (shutdown_tx, shutdown_rx) = mpsc::channel(1);
    
    // Spawn the OSIS actor
    println!("\n--- Spawning OSIS Actor ---");
    let actor_handle = spawn_osis_actor(
        db_path.to_string(),
        redis_url.to_string(),
        shutdown_rx,
    );
    
    println!("OSIS actor spawned and listening for jobs");
    
    // Process each script
    for (i, script_path) in script_files.iter().enumerate() {
        println!("\n=== Processing Script {}/{}: {} ===", i + 1, script_files.len(), script_path.file_name().unwrap().to_string_lossy());
        
        let script_content = match fs::read_to_string(script_path) {
            Ok(content) => content,
            Err(e) => {
                println!("Failed to read script {}: {}", script_path.display(), e);
                continue;
            }
        };
        
        // Create a job for this script
        let job = Job::new(
            "example_caller".to_string(),
            format!("script_{}", script_path.file_stem().unwrap().to_string_lossy()),
            script_content,
            ScriptType::OSIS,
        );
        
        println!("Created job with ID: {}", job.id);
        
        // Store the job in Redis
        let job_key = format!("job:{}", job.id);
        job.store_in_redis(&mut redis_conn).await?;
        
        // Set initial status to Dispatched (since store_in_redis sets it to "pending" which isn't in the enum)
        Job::update_status(&mut redis_conn, &job.id, JobStatus::Dispatched).await?;
        println!("Stored job in Redis with key: {} and status: Dispatched", job_key);
        
        // Add the job to the OSIS queue for processing
        // Note: The supervisor uses "actor_queue:" prefix, so the correct queue is:
        let queue_key = "hero:job:actor_queue:osis";
        let _: () = redis_conn.lpush(&queue_key, &job.id).await?;
        println!("Dispatched job {} to OSIS queue: {}", job.id, queue_key);
        
        println!("\n--- Waiting for Job Result ---");
        
        // Wait for result or error from Redis queues with timeout
        let result_key = format!("hero:job:{}:result", job.id);
        let error_key = format!("hero:job:{}:error", job.id);
        let timeout_secs = 10.0;
        
        // Use BLPOP to block and wait for either result or error
        let keys = vec![result_key.clone(), error_key.clone()];
        match redis_conn.blpop::<_, Option<(String, String)>>(&keys, timeout_secs).await {
            Ok(Some((queue_name, value))) => {
                if queue_name == result_key {
                    println!("✓ Job completed successfully!");
                    println!("  Result: {}", value);
                } else if queue_name == error_key {
                    println!("✗ Job failed with error!");
                    println!("  Error: {}", value);
                }
            }
            Ok(None) => {
                println!("⏱ Job timed out after {} seconds", timeout_secs);
            }
            Err(e) => {
                println!("❌ Failed to wait for job result: {}", e);
            }
        }
    }
    
    // Shutdown the actor
    println!("\n--- Shutting Down Actor ---");
    if let Err(e) = shutdown_tx.send(()).await {
        println!("Failed to send shutdown signal: {}", e);
    }
    
    // Wait for actor to shutdown with timeout
    match timeout(Duration::from_secs(5), actor_handle).await {
        Ok(result) => {
            match result {
                Ok(Ok(())) => println!("OSIS actor shut down successfully"),
                Ok(Err(e)) => println!("OSIS actor shut down with error: {}", e),
                Err(e) => println!("OSIS actor panicked: {}", e),
            }
        }
        Err(_) => {
            println!("OSIS actor shutdown timed out");
        }
    }
    
    // Clean up the temporary database
    if Path::new(db_path).exists() {
        fs::remove_dir_all(db_path)?;
        println!("Cleaned up temporary database: {}", db_path);
    }
    
    println!("=== Actor Example Complete ===");
    Ok(())
}