import { Injectable, inject } from '@angular/core';
import { ElectronBridgeService } from './electron/electron-bridge.service';

/**
 * Opens URLs in the system default browser (Electron) or a new tab (browser).
 *
 * Usage:
 *   inject(ExternalLinkService).open('https://example.com');
 */
@Injectable({ providedIn: 'root' })
export class ExternalLinkService {
  private readonly electronBridge = inject(ElectronBridgeService);

  /** Open a URL externally. Only http/https URLs are allowed. */
  open(url: string): void {
    if (!url || !(url.startsWith('http://') || url.startsWith('https://')))
      return;

    const electronApi = this.electronBridge.getApi();

    if (electronApi) {
      void electronApi.openExternal(url);
      return;
    }

    window.open(url, '_blank', 'noopener,noreferrer');
  }

  /**
   * Click handler for anchor elements. Call from a (click) binding or HostListener.
   * Returns true if the click was handled (link opened externally), false otherwise.
   */
  handleClick(evt: MouseEvent): boolean {
    const target = (evt.target as HTMLElement)?.closest('a') as HTMLAnchorElement | null;

    if (!target)
      return false;

    const href = target.href;

    if (!href)
      return false;

    if (href.startsWith('javascript:') || href.startsWith('blob:') || href.startsWith('data:'))
      return false;

    const rawAttr = target.getAttribute('href');

    if (rawAttr?.startsWith('#'))
      return false;

    if (target.hasAttribute('routerlink') || target.hasAttribute('ng-reflect-router-link'))
      return false;

    evt.preventDefault();
    evt.stopPropagation();
    this.open(href);
    return true;
  }
}