// Copyright © 2016 The CefSharp Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.

namespace VideoBrowser.Controls.CefSharpBrowser.Helpers
{
    using CefSharp;
    using System;
    using System.Diagnostics;
    using System.Threading.Tasks;

    /// <summary>
    /// Defines the <see cref="BrowserProcessHandler" />.
    /// </summary>
    public class BrowserProcessHandler : IBrowserProcessHandler
    {
        #region Constants

        /// <summary>
        /// The interval between calls to Cef.DoMessageLoopWork
        /// </summary>
        protected const int SixtyTimesPerSecond = 1000 / 60;// 60fps

        /// <summary>
        /// The maximum number of milliseconds we're willing to wait between calls to OnScheduleMessagePumpWork().
        /// </summary>
        protected const int ThirtyTimesPerSecond = 1000 / 30;//30fps

        #endregion Constants

        #region Methods

        /// <summary>
        /// The Dispose.
        /// </summary>
        public virtual void Dispose()
        {
        }

        /// <summary>
        /// The OnScheduleMessagePumpWork.
        /// </summary>
        /// <param name="delay">The delay<see cref="int"/>.</param>
        protected virtual void OnScheduleMessagePumpWork(int delay)
        {
        }

        /// <summary>
        /// The OnContextInitialized.
        /// </summary>
        void IBrowserProcessHandler.OnContextInitialized()
        {
            //The Global CookieManager has been initialized, you can now set cookies
            var cookieManager = Cef.GetGlobalCookieManager();
            ////cookieManager.SetSupportedSchemes(new string[] { "custom" }, true);
            if (cookieManager.SetCookie("custom://cefsharp/home.html", new Cookie
            {
                Name = "CefSharpTestCookie",
                Value = "ILikeCookies",
                Expires = DateTime.Now.AddDays(1)
            }))
            {
                cookieManager.VisitUrlCookiesAsync("custom://cefsharp/home.html", false).ContinueWith(previous =>
                {
                    if (previous.Status == TaskStatus.RanToCompletion)
                    {
                        var cookies = previous.Result;

                        foreach (var cookie in cookies)
                        {
                            Debug.WriteLine("CookieName: " + cookie.Name);
                        }
                    }
                    else
                    {
                        Debug.WriteLine("No Cookies found");
                    }
                });

                cookieManager.VisitAllCookiesAsync().ContinueWith(t =>
                {
                    if (t.Status == TaskStatus.RanToCompletion)
                    {
                        var cookies = t.Result;

                        foreach (var cookie in cookies)
                        {
                            Debug.WriteLine("CookieName: " + cookie.Name);
                        }
                    }
                    else
                    {
                        Debug.WriteLine("No Cookies found");
                    }
                });
            }

            //The Request Context has been initialized, you can now set preferences, like proxy server settings
            //Dispose of context when finished - preferable not to keep a reference if possible.
            using (var context = Cef.GetGlobalRequestContext())
            {
                string errorMessage;
                //You can set most preferences using a `.` notation rather than having to create a complex set of dictionaries.
                //The default is true, you can change to false to disable
                context.SetPreference("webkit.webprefs.plugins_enabled", true, out errorMessage);

                //string error;
                //var dicts = new List<string> { "en-GB", "en-US" };
                //var success = context.SetPreference("spellcheck.dictionaries", dicts, out error);

                //The no-proxy-server flag is set in CefExample.cs class, you'll have to remove that before you can test
                //this code out
                //var v = new Dictionary<string, string>
                //{
                //    ["mode"] = "fixed_servers",
                //    ["server"] = "scheme://host:port"
                //};
                //success = context.SetPreference("proxy", v, out errorMessage);

                //It's possible to register a scheme handler for the default http and https schemes
                //In this example we register the FolderSchemeHandlerFactory for https://cefsharp.example
                //Best to include the domain name, so only requests for that domain are forwarded to your scheme handler
                //It is possible to intercept all requests for a scheme, including the built in http/https ones, be very careful doing this!
                ////var folderSchemeHandlerExample = new FolderSchemeHandlerFactory(rootFolder: @"..\..\..\..\CefSharp.Example\Resources",
                ////                                                        hostName: "cefsharp.example", //Optional param no hostname checking if null
                ////                                                        defaultPage: "home.html"); //Optional param will default to index.html

                ////context.RegisterSchemeHandlerFactory("https", "cefsharp.example", folderSchemeHandlerExample);
            }
        }

        /// <summary>
        /// The OnScheduleMessagePumpWork.
        /// </summary>
        /// <param name="delay">The delay<see cref="long"/>.</param>
        void IBrowserProcessHandler.OnScheduleMessagePumpWork(long delay)
        {
            //If the delay is greater than the Maximum then use ThirtyTimesPerSecond
            //instead - we do this to achieve a minimum number of FPS
            if (delay > ThirtyTimesPerSecond)
            {
                delay = ThirtyTimesPerSecond;
            }
            OnScheduleMessagePumpWork((int)delay);
        }

        #endregion Methods
    }
}