// <copyright file="TestUtilities.cs" company="Selenium Committers">
// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
// </copyright>

using System;

namespace OpenQA.Selenium;

public class TestUtilities
{
    private static IJavaScriptExecutor GetExecutor(IWebDriver driver)
    {
        return (IJavaScriptExecutor)driver;
    }

    private static string GetUserAgent(IWebDriver driver)
    {
        try
        {
            return (string)GetExecutor(driver).ExecuteScript("return navigator.userAgent;");
        }
        catch (Exception)
        {
            // Some drivers will only execute JS once a page has been loaded. Since those
            // drivers aren't Firefox or IE, we don't worry about that here.
            //
            // Non-javascript-enabled HtmlUnit throws an UnsupportedOperationException here.
            // Let's just ignore that.
            return "";
        }
    }

    public static bool IsChrome(IWebDriver driver)
    {
        return GetUserAgent(driver).Contains("Chrome");
    }

    public static bool IsFirefox(IWebDriver driver)
    {
        return GetUserAgent(driver).Contains("Firefox");
    }

    public static bool IsInternetExplorer(IWebDriver driver)
    {
        string userAgent = GetUserAgent(driver);
        return userAgent.Contains("MSIE") || userAgent.Contains("Trident");
    }

    public static bool IsIE6(IWebDriver driver)
    {
        return IsInternetExplorer(driver) && GetUserAgent(driver).Contains("MSIE 6");
    }

    public static bool IsIE10OrHigher(IWebDriver driver)
    {
        if (IsInternetExplorer(driver))
        {
            string jsToExecute = "return window.navigator.appVersion;";
            // IE9 is trident version 5.  IE9 is the start of new IE.
            string appVersionString = (string)GetExecutor(driver).ExecuteScript(jsToExecute);
            int tokenStart = appVersionString.IndexOf("MSIE ") + 5;
            int tokenEnd = appVersionString.IndexOf(";", tokenStart);
            if (tokenEnd - tokenStart > 0)
            {
                string substring = appVersionString.Substring(tokenStart, tokenEnd - tokenStart);
                double version = 0;
                bool parsed = double.TryParse(substring, out version);
                if (parsed)
                {
                    return version >= 10;
                }
            }
        }

        return false;
    }

    public static bool IsOldIE(IWebDriver driver)
    {
        try
        {
            string jsToExecute = "return parseInt(window.navigator.appVersion.split(' ')[0]);";
            // IE9 is trident version 5.  IE9 is the start of new IE.
            return (long)(GetExecutor(driver).ExecuteScript(jsToExecute)) < 5;
        }
        catch (Exception)
        {
            return false;
        }
    }
}