import { Smartenv } from '@push.rocks/smartenv';
import type { IWatcher, IWatcherOptions, IWatchEvent, TWatchEventType } from './interfaces.js';

export type { IWatcher, IWatcherOptions, IWatchEvent, TWatchEventType };

/**
 * Creates a file watcher, preferring the Rust backend when available.
 * Falls back to chokidar (Node.js/Bun) or Deno.watchFs based on runtime.
 */
export async function createWatcher(options: IWatcherOptions): Promise<IWatcher> {
  // Try Rust watcher first (works on all runtimes via smartrust IPC)
  try {
    const { RustWatcher } = await import('./watcher.rust.js');
    if (await RustWatcher.isAvailable()) {
      return new RustWatcher(options);
    }
  } catch {
    // Rust watcher not available, fall back
  }

  // Fall back to runtime-specific watchers
  const env = new Smartenv();

  if (env.isDeno) {
    const { DenoWatcher } = await import('./watcher.deno.js');
    return new DenoWatcher(options);
  } else {
    const { NodeWatcher } = await import('./watcher.node.js');
    return new NodeWatcher(options);
  }
}

/**
 * Default watcher options
 */
export const defaultWatcherOptions: IWatcherOptions = {
  basePaths: [],
  depth: 4,
  followSymlinks: false,
  debounceMs: 100
};