/**
 * Svelte action to mount a Svelte component into a DOM element
 */
import type { ComponentType, Snippet } from 'svelte';
import { mount, unmount } from 'svelte';

export function mountComponent(
  node: HTMLElement,
  component: ComponentType<any>,
  props: Record<string, any>
) {
  let instance: any = null;

  // Mount the component
  if (component && typeof component === 'function') {
    try {
      // Clear the node first to ensure clean mounting
      node.innerHTML = '';
      
      // Try using Svelte 5's mount function first
      try {
        instance = mount(component, {
          target: node,
          props
        });
      } catch (e) {
        // Fallback to Svelte 4 compatibility API
        console.debug('[mountComponent] Svelte 5 mount failed, trying compatibility API:', e);
        instance = new (component as any)({
          target: node,
          props,
          hydrate: false,
          intro: false
        });
      }
      
      // Verify the component was mounted
      if (!instance) {
        console.warn('[mountComponent] Component instance not created', { component, props });
      } else {
        // Force a tick to ensure effects run
        setTimeout(() => {
          // Effects should have run by now
        }, 0);
      }
    } catch (e) {
      console.error('[mountComponent] Failed to mount component:', e, { component, props, node });
    }
  } else {
    console.warn('[mountComponent] Invalid component provided', { component, props });
  }

  return {
    update(newProps: Record<string, any>) {
      if (instance) {
        // Try Svelte 5 update first
        if (typeof instance.$set === 'function') {
          try {
            instance.$set(newProps);
          } catch (e) {
            console.error('[mountComponent] Failed to update component:', e);
          }
        }
      }
    },
    destroy() {
      if (instance) {
        // Try Svelte 5 unmount first
        try {
          if (typeof unmount === 'function') {
            unmount(instance);
          } else if (typeof instance.$destroy === 'function') {
            instance.$destroy();
          }
        } catch (e) {
          console.error('[mountComponent] Failed to destroy component:', e);
        }
      }
      instance = null;
    }
  };
}