/**
 * Adapted from NavigatorJS 0.2
 * https://github.com/hicTech/navigatorJs
 * www.hictech.com
 */

export const platform = {
  os: function () {
    if (this.isIOS()) return 'ios';
    if (this.isAndroid()) return 'android';
    if (this.isWindows()) return 'windows';
    if (this.isUnix()) return 'unix';
    if (this.isMac()) return 'mac';
    if (this.isLinux()) return 'linux';
    if (this.isBlackBerry()) return 'blackberry';
    return undefined;
  },

  browser: function () {
    if (this.isSafari()) {
      return 'safari';
    }
    if (this.isChrome()) {
      return 'chrome';
    }
    if (this.isIE()) {
      return 'ie';
    }
    if (this.isEdge()) {
      return 'edge';
    }
    if (this.isFirefox()) {
      return 'firefox';
    }
    if (this.isOpera()) {
      return 'opera';
    }
    return undefined;
  },

  userAgent: function () {
    return navigator.userAgent;
  },

  browserName: function () {
    let ua = this.userAgent(),
      tem,
      M = ua.match(/(fxios|opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];

    if (/trident/i.test(M[1])) {
      tem = /\brv[ :]+(\d+)/g.exec(ua) || [];
      return 'IE ' + (tem[1] || '');
    }

    if (M[1] === 'Chrome') {
      /**
       * IE Edge has "chrome" as user agent and this check is mandatory at this
       * point. If the check is passed the M variable is replaced and the code
       * continues like other browsers.
       */
      tem = ua.match(/(edge(?=\/))\/?\s*(\d+)/i);

      if (tem) {
        M = tem;
      } else {
        tem = ua.match(/\bOPR\/(\d+)/);
        if (tem != null) return 'Opera ' + tem[1];
      }
    }

    M = M[2] ? [M[1], M[2]] : [navigator.appName, navigator.appVersion, '-?'];
    if ((tem = ua.match(/version\/(\d+)/i)) != null) M.splice(1, 1, tem[1]);
    return M.join(' ');
  },

  // **************************************************************************
  // mobile detection
  // **************************************************************************

  isMobile: function () {
    return (
      this.userAgent().match(/iPhone|iPad|iPod|Android|BlackBerry|Opera Mini|IEMobile|CRiOS|OPiOS|Mobile|FxiOS/i) !==
      null
    );
  },

  isDesktop: function () {
    return !this.isMobile();
  },

  // **************************************************************************
  // desktop detection
  // **************************************************************************

  isSafari: function () {
    return (
      this.userAgent().indexOf('Safari') !== -1 &&
      navigator.vendor.indexOf('Apple Computer') !== -1 &&
      !this.isChrome() &&
      !this.isFirefox() &&
      !this.isOpera()
    );
  },

  isChrome: function () {
    return (
      ((this.userAgent().indexOf('Chrome') !== -1 && navigator.vendor.indexOf('Google Inc') !== -1) ||
        this.userAgent().indexOf('CriOS') !== -1) &&
      !this.isOpera()
    );
  },

  isIE: function () {
    return (
      this.browserName()
        .toLowerCase()
        .match(/ie|msie|iemobile/i) != null
    );
  },

  isEdge: function () {
    return this.browserName().toLowerCase().match(/edge/i) != null;
  },

  isFirefox: function () {
    return (
      this.browserName()
        .toLowerCase()
        .match(/firefox|fxios/i) != null
    );
  },

  isOpera: function () {
    return (
      this.userAgent()
        .toLowerCase()
        .match(/opera|opr|opera mini|opios/i) != null ||
      Object.prototype.toString.call(window.operamini) === '[object OperaMini]'
    );
  },

  // **************************************************************************
  // mobile browser detection
  // **************************************************************************

  isMobileChrome: function () {
    return this.userAgent().toLowerCase().match('crios') != null || (this.isChrome() && this.isMobile());
  },

  isMobileSafari: function () {
    return this.isMobile() && this.isSafari();
  },

  isMobileIE: function () {
    return this.isMobile() && this.isIE();
  },

  isMobileOpera: function () {
    return this.isMobile() && this.isOpera();
  },

  isMobileFirefox: function () {
    return this.isMobile() && this.isFirefox();
  },

  // **************************************************************************
  // **************************************************************************

  isIOS: function () {
    return (
      (/iPad|iPhone|iPod/.test(navigator.platform) ||
        // for iOS 13+ , platform is MacIntel, so use this to test
        (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1)) &&
      !window.MSStream
    );
  },

  isAndroid: function () {
    return this.userAgent().match(/Android/i) != null;
  },

  isWindows: function () {
    return this.userAgent().match(/Windows/i) != null;
  },

  isUnix: function () {
    return this.userAgent().match(/Unix/i) != null;
  },

  isMac: function () {
    return this.userAgent().match(/Mac/i) != null && !this.isIOS();
  },

  isLinux: function () {
    return this.userAgent().match(/Linux/i) != null && !this.isAndroid();
  },

  isBlackBerry: function () {
    return this.userAgent().match(/BlackBerry/i) != null;
  },

  // isIPad: function() { << untested
  //   return (/ipad/gi).test(navigator.platform);
  // },

  // isIPhone: function() { << untested
  //   return (/iphone/gi).test(navigator.platform);
  // },

  // isLandscape: function() {  << I think window.orientation makes more sense
  //   return window.innerHeight < window.innerWidth;
  // },

  // isPortrait: function() {  << I think window.orientation makes more sense
  //   return !this.isLandscape();
  // },

  // **************************************************************************
  // **************************************************************************

  version: function () {
    return this.browserName().replace(/^\D+/g, '');
  },

  maxTouchPoints: function () {
    return navigator.maxTouchPoints || undefined;
  },

  isTouch: function () {
    return 'ontouchstart' in window || 'onmsgesturechange' in window;
    // return 'ontouchstart' in document.documentElement;
  },
};