import { PlatformServiceFactory } from "./PlatformServiceFactory";
import { PlatformService } from "./PlatformService";
import { logger } from "@/utils/logger";

/**
 * QR Navigation Service
 *
 * Handles platform-specific routing logic for QR scanning operations.
 * Removes coupling between views and routing logic by centralizing
 * navigation decisions based on platform capabilities.
 *
 * @author Matthew Raymer
 */
export class QRNavigationService {
  private static instance: QRNavigationService | null = null;
  private platformService: PlatformService;

  private constructor() {
    this.platformService = PlatformServiceFactory.getInstance();
  }

  /**
   * Get singleton instance of QRNavigationService
   */
  public static getInstance(): QRNavigationService {
    if (!QRNavigationService.instance) {
      QRNavigationService.instance = new QRNavigationService();
    }
    return QRNavigationService.instance;
  }

  /**
   * Get the appropriate QR scanner route based on platform
   *
   * @returns Object with route name and parameters for QR scanning
   */
  public getQRScannerRoute(): {
    name: string;
    params?: Record<string, string | number>;
  } {
    const isCapacitor = this.platformService.isCapacitor();

    logger.debug("QR Navigation - Platform detection:", {
      isCapacitor,
      platform: this.platformService.getCapabilities(),
    });

    if (isCapacitor) {
      // Use native scanner on mobile platforms
      return { name: "contact-qr-scan-full" };
    } else {
      // Use web scanner on other platforms
      return { name: "contact-qr" };
    }
  }

  /**
   * Get the appropriate QR display route based on platform
   *
   * @returns Object with route name and parameters for QR display
   */
  public getQRDisplayRoute(): {
    name: string;
    params?: Record<string, string | number>;
  } {
    const isCapacitor = this.platformService.isCapacitor();

    logger.debug("QR Navigation - Display route detection:", {
      isCapacitor,
      platform: this.platformService.getCapabilities(),
    });

    if (isCapacitor) {
      // Use dedicated display view on mobile
      return { name: "contact-qr-scan-show" };
    } else {
      // Use combined view on web
      return { name: "contact-qr" };
    }
  }

  /**
   * Check if native QR scanning is available on current platform
   *
   * @returns true if native scanning is available, false otherwise
   */
  public isNativeScanningAvailable(): boolean {
    return this.platformService.isCapacitor();
  }

  /**
   * Get platform capabilities for QR operations
   *
   * @returns Platform capabilities object
   */
  public getPlatformCapabilities() {
    return this.platformService.getCapabilities();
  }
}