import { Platform } from '@angular/cdk/platform';
import { Injectable } from '@angular/core';
import { BriPlatform } from '@davita/bridge-library/shared';

@Injectable({
  providedIn: 'root',
})
export class BriPlatformService {
  isBrowser: boolean = false;

  constructor() {}

  /**
   * @deprecated
   * Please use BriPlatformService.platform that returns BriPlatform
   */
  currentPlatform() {
    var _platform: Platform = new Platform('browser');
    this.isBrowser = _platform.isBrowser;
    if (_platform.IOS) {
      return 'ios';
    } else if (_platform.ANDROID) {
      return 'android';
    } else {
      return 'web';
    }
  }

  get platform(): BriPlatform {
    const userAgent = navigator.userAgent || navigator.vendor || (window as any).opera;
    const platform = navigator.platform || 'unknown';
    const maxTouchPoints = navigator.maxTouchPoints || 0;

    // Detect if it's an iPad
    const isIPad = /iPad/.test(userAgent) || (/Mac/.test(platform) && maxTouchPoints >= 1);
    // Detect if it's an iPhone
    const isIPhone = /iPhone/.test(userAgent);
    // Detect if it's an iOS device
    const isIOS = isIPad || isIPhone;
    // Detect if it's an Android device
    const isAndroid = /Android/.test(userAgent);
    // Detect if it's Chrome on iOS
    const isCriOS = /CriOS/.test(userAgent);
    // Detect if it's Safari
    const isSafari = /Version/.test(userAgent);

    // iPhone detection
    if (isIPhone) {
      if (isSafari) {
        return BriPlatform.iPhoneSafari;
      }
      return BriPlatform.iPhoneWebView;
    }

    // Android detection
    if (isAndroid) {
      if (isSafari) {
        return BriPlatform.androidBrowser;
      }
      return BriPlatform.androidWebView;
    }

    // iPhone/iPad browser (Chrome)
    if (isIOS && isCriOS) {
      if (isIPad) {
        return BriPlatform.iPadBrowser;
      }
      return BriPlatform.iPhoneBrowser;
    }

    // iPad detection
    if (isIPad) {
      if (isSafari) {
        return BriPlatform.iPadSafari;
      }
      return BriPlatform.iPadWebView;
    }
    // Default to computer
    return BriPlatform.computer;
  }
}