using Lskj.Business;
using Lskj.Model;
using Lskj.Util;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xilium.CefGlue;

namespace Lskj.Control.BrowserSetting2
{
    public class BsClient : CefClient
    {
        public FrmWebBrowser2 frmWebBrowser;
        public event EventHandler OnCreated;
        private readonly CefLifeSpanHandler lifeSpanHandler;
        private readonly CefDownloadHandler downloadHandler;
        private readonly CefKeyboardHandler keyboardHandler;
        private readonly CefFocusHandler focusHandler;
        private readonly CefRequestHandler requestHandler;
        private readonly CefContextMenuHandler contextMenuHandler;
        public BsClient(int RightKeyFlag = 0, bool AllowDownload = true)
        {
            if (SystemInfo.Instance.BrowserRight) RightKeyFlag = 1;
            lifeSpanHandler = new BsLifeSpanHandler(this);
            downloadHandler = new BsDownloadHandler(AllowDownload);
            keyboardHandler = new BsKeyboardHandler();
            focusHandler = new BsFocusHandler();
            requestHandler = new BsRequestHandler();
            contextMenuHandler = new BsContextMenuHandler(RightKeyFlag);
        }
        protected override CefLifeSpanHandler GetLifeSpanHandler()
        {
            return lifeSpanHandler;
        }
        protected override CefDownloadHandler GetDownloadHandler()
        {
            return downloadHandler;
        }
        protected override CefKeyboardHandler GetKeyboardHandler()
        {
            return keyboardHandler;
        }
        protected override CefFocusHandler GetFocusHandler()
        {
            return focusHandler;
        }
        protected override CefRequestHandler GetRequestHandler()
        {
            return requestHandler;
        }
        protected override CefContextMenuHandler GetContextMenuHandler()
        {
            return contextMenuHandler;
        }
        protected override bool OnProcessMessageReceived(CefBrowser browser, CefFrame frame, CefProcessId sourceProcess, CefProcessMessage message)
        {
            try
            {
                return OnProcessMessageReceivedCore(browser, frame, sourceProcess, message);
            }
            catch (Exception exception)
            {
                ReportProcessMessageFailure(exception);
                return true;
            }
        }

        private bool OnProcessMessageReceivedCore(CefBrowser browser, CefFrame frame, CefProcessId sourceProcess, CefProcessMessage message)
        {
            if (message.Name.Equals("OpenModule"))
            {
                string arg0 = message.Arguments.GetString(0);
                string arg1 = message.Arguments.GetString(1);
                string arg2 = message.Arguments.GetString(2);
                string arg3 = message.Arguments.GetString(3);
                string arg4 = message.Arguments.GetString(4);
                PostToUiThread(
                    ERPInfo.Instance.MainControl,
                    delegate
                    {
                        BrowserSetting.BsOpenModuleHandler.OpenModule(
                            arg0,
                            arg1,
                            arg2,
                            arg3,
                            arg4);
                    });
            }
            else if (message.Name.Equals("OpenOnRightClick"))
            {
                string arg0 = message.Arguments.GetString(0);
                string arg1 = message.Arguments.GetString(1);
                string arg2 = message.Arguments.GetString(2);
                string arg3 = message.Arguments.GetString(3);
                PostToUiThread(
                    ERPInfo.Instance.MainControl,
                    delegate
                    {
                        BrowserSetting.BsOpenModuleHandler.OpenRightModule(
                            arg0,
                            arg1,
                            arg2,
                            arg3);
                    });
            }
            else if (message.Name.Equals("CloseWin"))
            {
                var browserControl = frmWebBrowser;
                PostToUiThread(
                    browserControl,
                    delegate
                    {
                        // Resolve the owning form only after returning to the
                        // WinForms UI thread.
                        var parent = browserControl.Parent;
                        var baseForm = parent == null
                            ? null
                            : parent.Parent as BaseForm;
                        if (baseForm == null || baseForm.IsDisposed)
                            return;

                        baseForm.Close();
                    });
            }
            return base.OnProcessMessageReceived(browser, frame, sourceProcess, message);
        }

        private static void PostToUiThread(
            System.Windows.Forms.Control control,
            Action action)
        {
            if (control == null || action == null || control.IsDisposed ||
                !control.IsHandleCreated)
                return;

            Action guardedAction = delegate
            {
                if (control.IsDisposed)
                    return;

                try
                {
                    action();
                }
                catch (Exception exception)
                {
                    ReportProcessMessageFailure(exception);
                }
            };

            try
            {
                // Never keep CEF's UI thread blocked while WinForms opens a
                // modal module that may create another CEF browser.
                control.BeginInvoke(guardedAction);
            }
            catch (Exception exception)
            {
                ReportProcessMessageFailure(exception);
            }
        }

        private static void ReportProcessMessageFailure(Exception exception)
        {
            try
            {
                LogHelper.Instance.WriteError(exception);
            }
            catch
            {
                // Never propagate logging failures into a native CEF callback.
            }

            Action showError = delegate
            {
                try
                {
                    MessageUtil.Show(exception);
                }
                catch
                {
                }
            };

            try
            {
                System.Windows.Forms.Control mainControl = ERPInfo.Instance.MainControl;
                if (mainControl == null || mainControl.IsDisposed ||
                    !mainControl.IsHandleCreated)
                    return;

                if (mainControl.InvokeRequired)
                    mainControl.BeginInvoke(showError);
                else
                    showError();
            }
            catch
            {
                // The main window may close while the callback is reporting.
            }
        }

        public void Created(CefBrowser cefBrowser)
        {
            if (frmWebBrowser != null && OnCreated != null)
            {
                OnCreated(cefBrowser, EventArgs.Empty);
            }
        }

        public bool Closing(CefBrowser browser)
        {
            var control = frmWebBrowser;
            return control != null && control.BrowserClosing(browser);
        }

        public void Closed(CefBrowser browser)
        {
            var control = frmWebBrowser;
            if (control != null)
            {
                control.BrowserClosed(browser);
                if (control.cefBrowserSettings == null)
                {
                    frmWebBrowser = null;
                    OnCreated = null;
                }
            }
        }
    }
}