//! File watching for hot reloading configuration.

use crate::{ConfigResult, RuntimeConfig};
use std::path::PathBuf;
use std::sync::Arc;
use tokio::sync::broadcast;

/// File watch events.
#[derive(Debug, Clone)]
pub enum WatchEvent {
    Modified { path: PathBuf },
    Deleted { path: PathBuf },
    Error { error: String },
}

/// Watcher configuration.
#[derive(Debug, Clone)]
pub struct WatcherConfig {
    pub poll_interval: std::time::Duration,
    pub ignore_patterns: Vec<String>,
}

impl Default for WatcherConfig {
    fn default() -> Self {
        Self {
            poll_interval: std::time::Duration::from_millis(500),
            ignore_patterns: vec![
                "*.tmp".to_string(),
                "*.swp".to_string(),
                ".git/**".to_string(),
            ],
        }
    }
}

/// Configuration file watcher.
#[derive(Debug)]
pub struct ConfigWatcher {
    _runtime_config: Arc<RuntimeConfig>,
    event_sender: broadcast::Sender<WatchEvent>,
}

impl ConfigWatcher {
    pub async fn new(runtime_config: Arc<RuntimeConfig>) -> ConfigResult<Self> {
        let (event_sender, _) = broadcast::channel(1000);

        Ok(Self {
            _runtime_config: runtime_config,
            event_sender,
        })
    }

    pub async fn watch_file(&self, _path: &std::path::Path) -> ConfigResult<()> {
        // Placeholder implementation
        Ok(())
    }

    pub fn subscribe(&self) -> broadcast::Receiver<WatchEvent> {
        self.event_sender.subscribe()
    }
}