//! # Hero Supervisor Application
//!
//! Simplified supervisor application that wraps a built Supervisor instance.
//! Use SupervisorBuilder to construct the supervisor with all configuration,
//! then pass it to SupervisorApp for runtime management.

use crate::Supervisor;
use crate::mycelium::MyceliumIntegration;
use log::{info, error, debug};
use std::sync::Arc;
use tokio::sync::Mutex;

/// Main supervisor application
pub struct SupervisorApp {
    pub supervisor: Supervisor,
    pub mycelium_url: String,
    pub topic: String,
}

impl SupervisorApp {
    /// Create a new supervisor application with a built supervisor
    pub fn new(supervisor: Supervisor, mycelium_url: String, topic: String) -> Self {
        Self { 
            supervisor,
            mycelium_url,
            topic,
        }
    }

    /// Start the complete supervisor application
    /// This method handles the entire application lifecycle:
    /// - Starts all configured runners
    /// - Connects to Mycelium daemon for message transport
    /// - Sets up graceful shutdown handling
    /// - Keeps the application running
    pub async fn start(&mut self) -> Result<(), Box<dyn std::error::Error>> {
        info!("Starting Hero Supervisor Application");

        // Start all configured runners
        self.start_all().await?;

        // Start Mycelium integration
        self.start_mycelium_integration().await?;

        // Set up graceful shutdown
        self.setup_graceful_shutdown().await;

        // Keep the application running
        info!("Supervisor is running. Press Ctrl+C to shutdown.");
        self.run_main_loop().await;

        Ok(())
    }

    /// Start the Mycelium integration
    async fn start_mycelium_integration(&self) -> Result<(), Box<dyn std::error::Error>> {
        info!("Starting Mycelium integration...");
        
        let supervisor_for_mycelium = Arc::new(Mutex::new(self.supervisor.clone()));
        let mycelium_url = self.mycelium_url.clone();
        let topic = self.topic.clone();
        
        let mycelium_integration = MyceliumIntegration::new(
            supervisor_for_mycelium,
            mycelium_url,
            topic,
        );
        
        // Start the Mycelium integration in a background task
        let integration_handle = tokio::spawn(async move {
            if let Err(e) = mycelium_integration.start().await {
                error!("Mycelium integration error: {}", e);
            }
        });

        // Give the integration a moment to start
        tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;
        info!("Mycelium integration started successfully");

        // Store the handle for potential cleanup
        std::mem::forget(integration_handle); // For now, let it run in background

        Ok(())
    }

    /// Set up graceful shutdown handling
    async fn setup_graceful_shutdown(&self) {
        tokio::spawn(async move {
            tokio::signal::ctrl_c().await.expect("Failed to listen for ctrl+c");
            info!("Received shutdown signal");
            std::process::exit(0);
        });
    }

    /// Main application loop
    async fn run_main_loop(&self) {
        // Keep the main thread alive
        loop {
            tokio::time::sleep(tokio::time::Duration::from_secs(1)).await;
        }
    }

    /// Start all configured runners
    pub async fn start_all(&mut self) -> Result<(), Box<dyn std::error::Error>> {
        info!("Starting all runners");
        
        let results = self.supervisor.start_all().await;
        let mut failed_count = 0;
        
        for (runner_id, result) in results {
            match result {
                Ok(_) => info!("Runner {} started successfully", runner_id),
                Err(e) => {
                    error!("Failed to start runner {}: {}", runner_id, e);
                    failed_count += 1;
                }
            }
        }
        
        if failed_count == 0 {
            info!("All runners started successfully");
        } else {
            error!("Failed to start {} runners", failed_count);
        }

        Ok(())
    }

    /// Stop all configured runners
    pub async fn stop_all(&mut self, force: bool) -> Result<(), Box<dyn std::error::Error>> {
        info!("Stopping all runners (force: {})", force);
        
        let results = self.supervisor.stop_all(force).await;
        let mut failed_count = 0;
        
        for (runner_id, result) in results {
            match result {
                Ok(_) => info!("Runner {} stopped successfully", runner_id),
                Err(e) => {
                    error!("Failed to stop runner {}: {}", runner_id, e);
                    failed_count += 1;
                }
            }
        }
        
        if failed_count == 0 {
            info!("All runners stopped successfully");
        } else {
            error!("Failed to stop {} runners", failed_count);
        }

        Ok(())
    }


    /// Get status of all runners
    pub async fn get_status(&self) -> Result<Vec<(String, String)>, Box<dyn std::error::Error>> {
        debug!("Getting status of all runners");
        
        let statuses = self.supervisor.get_all_runner_status().await
            .map_err(|e| Box::new(e) as Box<dyn std::error::Error>)?;
        
        let status_strings: Vec<(String, String)> = statuses
            .into_iter()
            .map(|(runner_id, status)| {
                let status_str = format!("{:?}", status);
                (runner_id, status_str)
            })
            .collect();
        
        Ok(status_strings)
    }
}