using CefSharp;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;

namespace CsharpHttpHelper
{
    public static class BrowserExtend
    {
        public class CookieVisitor : CefSharp.ICookieVisitor
        {
            public event Action<CefSharp.Cookie> SendCookie;

            public void Dispose()
            {
               
            }

            public bool Visit(CefSharp.Cookie cookie, int count, int total, ref bool deleteCookie)
            {
                deleteCookie = false;
                if (SendCookie != null)
                {
                    SendCookie(cookie);
                }

                return true;
            }
        }
        /// <summary>
        /// 初始化Cef
        /// </summary>
        /// <param name="path"></param>
        public static void InitializeCef(string path)
        {


            var libraryLoader = new CefSharp.CefLibraryHandle(path + "\\libcef.dll");
            var isValid = !libraryLoader.IsInvalid;
            if (isValid)
            {
                _InitializeCef(path);//初始化CEF
            }
            else throw new Exception("libcef.dll 加载失败!");

        }

        [MethodImpl(MethodImplOptions.NoInlining)]
        private static void _InitializeCef(string path)
        {
            var browser = path + "\\CefSharp.BrowserSubprocess.exe";
            var locales = path + "\\locales";

            var settings = new CefSharp.CefSettings
            {
                PersistSessionCookies = true,
                CachePath = path+"\\cache",
                BrowserSubprocessPath = browser,
                LocalesDirPath = locales,
                ResourcesDirPath = path
            };
            CefSharp.Cef.Initialize(settings, false, false);
        }

       /// <summary>
       /// 执行JS代码
       /// </summary>
       /// <param name="browser">浏览器</param>
       /// <param name="jsCode">执行代码</param>
       /// <param name="waitResult">等待响应结果</param>
       /// <returns></returns>
        public static string ExcuteJs(this CefSharp.WinForms.ChromiumWebBrowser browser, string jsCode,bool waitResult = false)
        {
            if (waitResult)
            {
                Task<CefSharp.JavascriptResponse> t = browser.EvaluateScriptAsync(jsCode);
                t.Wait();
                if (t.Result.Result != null)
                {
                    return t.Result.Result.ToString();
                }
            }else browser.EvaluateScriptAsync(jsCode);
            return string.Empty;
          
        }
        const string Code_GetElementByClassName = @"function getElementByClassName(className){var aResult =[];var aEle = document.getElementsByTagName('*');for (var i = 0; i < aEle.length; i++){if (aEle[i].className == className){aResult.push(aEle[i]);}}return aResult;}";

       /// <summary>
       /// 设置样式
       /// </summary>
        public static void SetStyleByClassName(this CefSharp.WinForms.ChromiumWebBrowser browser,string style, string[] classNames)
        {
            style = style.Replace("\"","'");
            StringBuilder js = new StringBuilder(Code_GetElementByClassName);
            for (int i = 0; i < classNames.Length; i++)
            {
                js.Append("var result = getElementByClassName('" + classNames[i] + "');for(var i=0;i<result.length;i++){result[i].setAttribute('style','" + style + "')}");
            }
           
            browser.ExcuteJs(js.ToString(),false); 
        }


   

        /// <summary>
        /// 设置样式
        /// </summary>
        public static void SetStyleById(this CefSharp.WinForms.ChromiumWebBrowser browser, string style,string[] ids)
        {
            style = style.Replace("\"", "'");
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < ids.Length; i++)
            {
                sb.Append("var result =document.getElementById('" + ids[i] + "'); if(typeof(result)=='object'){result.setAttribute('style','" + style + "')}");
            }
           
            browser.ExcuteJs(sb.ToString(), false);
        }




    }
}