using System;
using Foundation;
using WebKit;
using System.Collections.Generic;
namespace Shared
{
    /// <summary>
    /// WebView
    /// </summary>
	public class WebView:View
	{
        public Action<Dictionary<string,string>> JSToNativeAction;

        /// <summary>
        /// DidFinishAction
        /// </summary>
        public Action DidFinishAction;

        /// <summary>
        /// WKWebView
        /// </summary>
        private InnerWKWebView uiWebView
		{
			get
			{
				return this.uiView as InnerWKWebView;
			}
			set
			{
				this.uiView = value;
			}
		}

        /// <summary>
        /// WebView
        /// </summary>
		public WebView ()
		{
            // 配置网页的配置文件
            WKWebViewConfiguration configuration = new WKWebViewConfiguration { };


            //默认布局，宽高为0的话会异常
            var mFrame = new CoreGraphics.CGRect(base.X, base.Y, 10, 10);
            this.uiWebView = new InnerWKWebView(this, mFrame, configuration) { };
            uiWebView.ScrollView.Bounces = false;
            //uiWebView.NavigationDelegate = new OnWKNavigationDelegate(this);
            configuration.UserContentController.AddScriptMessageHandler(this.uiWebView, "call");

        }

        /// <summary>
        /// 加载网页
        /// </summary>
        /// <param name="url"></param>
        public void LoadRequest(string url)
		{
			uiWebView.LoadRequest ( Foundation.NSUrlRequest.FromUrl (  Foundation.NSUrl .FromString(url)));
		}

        public void CallJS(string js)
        {
            uiWebView.EvaluateJavaScript(js,(result, error) => {
                System.Console.WriteLine(error + "");
            });
        }

        /// <summary>
        /// 加载本地HTML
        /// </summary>
        public void LoadFileUrl(string url)
        {
            var urls = url.Split("?");
            url = urls[0];
            Console.WriteLine(url + "xxxxxxxxxxxxx");
            string parameter = null;
            if (1 < urls.Length)
            {
                parameter = urls[1];
            }
            if (url.EndsWith(".html"))
            {
                url = url.Substring(0, url.Length - ".html".Length);
            }
            var filePath = NSBundle.MainBundle.PathForResource(url, "html");
            if (parameter == null)
            {
                var nsUrl = new NSUrl(filePath,false);
                uiWebView.LoadFileUrl(nsUrl, nsUrl);
            }
            else
            {
                var path = $"file://{filePath}?{parameter}"; //转成file路径，并且拼上参数
                //var newPath = NSUrl..Encode(path);
                NSUrlComponents nSUrl = new NSUrlComponents(path);
                var nsUrl = nSUrl.Url;//NSUrl.FromString(newPath.ToString());
                uiWebView.LoadFileUrl(nsUrl, nsUrl);

            }
        }


        /// <summary>
        /// 加载Html标签的富文本
        /// </summary>
        /// <param name="htmlStr"></param>
        public void LoadHTMLString(string htmlStr)
        {
            uiWebView.LoadHtmlString(htmlStr, null);
        }

        class InnerWKWebView : WKWebView, IWKScriptMessageHandler
        {
            [Weak] WebView webView;
            public InnerWKWebView(WebView webView, CoreGraphics.CGRect cGRect, WKWebViewConfiguration wKWebViewConfiguration) : base(cGRect, wKWebViewConfiguration)
            {
                this.webView = webView;
            }
            public void DidReceiveScriptMessage(WKUserContentController userContentController, WKScriptMessage message)
            {
                if (message.Name == "call")
                {
                    if (message.Body == null)
                    {
                        return;
                    }
                    var nsDictionary = (NSDictionary)message.Body;

                    if (nsDictionary == null)
                    {
                        return;
                    }
                    var dictionary = new Dictionary<string, string> { };

                    foreach (var nsKey in nsDictionary.Keys)
                    {
                        var key = nsKey.ToString();
                        dictionary.Add(key, nsDictionary.ValueForKey(new NSString(key))?.ToString());
                    }
                    webView?.JSToNativeAction?.Invoke(dictionary);
                }
            }
        }



        /// <summary>
        /// OnWKNavigationDelegate
        /// </summary>
        class OnWKNavigationDelegate : WKNavigationDelegate
        {
            [Weak] WebView _WebView;

            public OnWKNavigationDelegate(WebView view)
            {
                _WebView = view;
            }

            public override void DidFinishNavigation(WKWebView webView, WKNavigation navigation)
            {
                HDLUtils.WriteLine("WKWebView DidFinishNavigation");
                _WebView.DidFinishAction?.Invoke();
            }
        }
    }
}