/*
Copyright 2018-2020 Intel Corporation

Licensed 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.
*/


//
// This module provides helper functions to interact/manipulate the windows console
//

var TrayIconFlags =
    {
        NIF_MESSAGE: 0x00000001,
        NIF_ICON: 0x00000002,
        NIF_TIP: 0x00000004,
        NIF_STATE: 0x00000008,
        NIF_INFO: 0x00000010,
        NIF_GUID: 0x00000020,
        NIF_REALTIME: 0x00000040,
        NIF_SHOWTIP: 0x00000080,

        NIM_ADD: 0x00000000,
        NIM_MODIFY: 0x00000001,
        NIM_DELETE: 0x00000002,
        NIM_SETFOCUS: 0x00000003,
        NIM_SETVERSION: 0x00000004
    };
var NOTIFYICON_VERSION_4 = 4;
var MessageTypes = { WM_APP: 0x8000, WM_USER: 0x0400 };

function WindowsConsole()
{
    if (process.platform == 'win32')
    {
        this._ObjectID = 'win-console';
        this._Marshal = require('_GenericMarshal');
        this._kernel32 = this._Marshal.CreateNativeProxy("kernel32.dll");
        this._user32 = this._Marshal.CreateNativeProxy("user32.dll");
        this._kernel32.CreateMethod("GetConsoleWindow");                            // https://learn.microsoft.com/en-us/windows/console/getconsolewindow
        this._kernel32.CreateMethod('GetCurrentThread');                            // https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-getcurrentthread
        this._user32.CreateMethod("ShowWindow");                                    // https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-showwindow
        this._user32.CreateMethod("LoadImageA");                                    // https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-loadimagea
        this._user32.CreateMethod({ method: 'GetMessageA', threadDispatch: 1 });    // https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getmessagea
        this._shell32 = this._Marshal.CreateNativeProxy('Shell32.dll');
        this._shell32.CreateMethod('Shell_NotifyIconA');                            // https://learn.microsoft.com/en-us/windows/win32/api/shellapi/nf-shellapi-shell_notifyicona

        this._handle = this._kernel32.GetConsoleWindow();
        this.minimize = function () {
            this._user32.ShowWindow(this._handle, 6);
        };
        this.restore = function () {
            this._user32.ShowWindow(this._handle, 9);
        };
        this.hide = function () {
            this._user32.ShowWindow(this._handle, 0);
        };
        this.show = function () {
            this._user32.ShowWindow(this._handle, 5);
        };


        // Load an icon, and return a HANDLE to it
        this._loadicon = function (imagePath)
        {
            var h = this._user32.LoadImageA(0, this._Marshal.CreateVariable(imagePath), 1, 0, 0, 0x00000010 | 0x00008000 | 0x00000040); // LR_LOADFROMFILE | LR_SHARED | LR_DEFAULTSIZE
            return (h);
        };

        // Create a tray icon
        this.SetTrayIcon = function SetTrayIcon(options)
        {
            var data = this._Marshal.CreateVariable(this._Marshal.PointerSize == 4 ? 508 : 528);
            //console.log('struct size = ' + data._size);
            //console.log('TryIcon, WM_MESSAGE filter = ' + options.filter);
            data.toBuffer().writeUInt32LE(data._size, 0);

            var trayType = TrayIconFlags.NIF_TIP | TrayIconFlags.NIF_MESSAGE
            options.filter = MessageTypes.WM_APP + 1;
            data.Deref(this._Marshal.PointerSize == 4 ? 16 : 24, 4).toBuffer().writeUInt32LE(options.filter);

            if (!options.noBalloon) { trayType |= TrayIconFlags.NIF_INFO; }

            if (options.icon)
            {                
                trayType |= TrayIconFlags.NIF_ICON;
                var hIcon = data.Deref(this._Marshal.PointerSize == 4 ? 20 : 32, this._Marshal.PointerSize);
                options.icon.pointerBuffer().copy(hIcon.toBuffer());
            }

            data.Deref(this._Marshal.PointerSize * 2, 4).toBuffer().writeUInt32LE(1);
            data.Deref(this._Marshal.PointerSize == 4 ? 12 : 20, 4).toBuffer().writeUInt32LE(trayType);
            data.Deref(this._Marshal.PointerSize == 4 ? 416 : 432, 4).toBuffer().writeUInt32LE(NOTIFYICON_VERSION_4);

            var szTip = data.Deref(this._Marshal.PointerSize == 4 ? 24 : 40, 128);
            var szInfo = data.Deref(this._Marshal.PointerSize == 4 ? 160 : 176, 256);
            var szInfoTitle = data.Deref(this._Marshal.PointerSize == 4 ? 420 : 436, 64);

            if (options.szTip) { Buffer.from(options.szTip).copy(szTip.toBuffer()); }
            if (options.szInfo) { Buffer.from(options.szInfo).copy(szInfo.toBuffer()); }
            if (options.szInfoTitle) { Buffer.from(options.szInfoTitle).copy(szInfoTitle.toBuffer()); }

            // Setup a message pump, so we can receive windows events for the tray icon
            var MessagePump = require('win-message-pump');
            retVal = { _ObjectID: 'WindowsConsole.TrayIcon', MessagePump: new MessagePump(options) };
            var retValEvents = require('events').inherits(retVal);
            retValEvents.createEvent('ToastClicked');   // Dispatched when the user clicks on the toast
            retValEvents.createEvent('IconHover');      // Dispatched when the user hovers over the tray icon
            retValEvents.createEvent('ToastDismissed'); // Dispatched when the toast is dismissed
            retVal.Options = options;
            retVal.MessagePump.TrayIcon = retVal;
            retVal.MessagePump.NotifyData = data;
            retVal.MessagePump.WindowsConsole = this;
            retVal.MessagePump.on('exit', function onExit(code) { console.log('Pump Exited'); if (this.TrayIcon) { this.TrayIcon.remove(); } });
            retVal.MessagePump.on('hwnd', function onHwnd(h)
            {
                //console.log('Got HWND');
                options.hwnd = h;
                h.pointerBuffer().copy(this.NotifyData.Deref(this.WindowsConsole._Marshal.PointerSize, this.WindowsConsole._Marshal.PointerSize).toBuffer());

                if(this.WindowsConsole._shell32.Shell_NotifyIconA(TrayIconFlags.NIM_ADD, this.NotifyData).Val == 0)
                {
                    // Something went wrong
                }
            });
            retVal.MessagePump.on('message', function onWindowsMessage(msg)
            {
                // Process the Windows Message, if we are interested in it
                if(msg.message == this.TrayIcon.Options.filter)
                {
                    var handled = false;
                    if (msg.wparam == 1 && msg.lparam == 1029)
                    {
                        this.TrayIcon.emit('ToastClicked');
                        handled = true;
                    }
                    if (msg.wparam == 1 && msg.lparam == 512)
                    {
                        this.TrayIcon.emit('IconHover');
                        handled = true;
                    }
                    if (this.TrayIcon.Options.balloonOnly && msg.wparam == 1 && (msg.lparam == 1028 || msg.lparam == 1029))
                    {
                        this.TrayIcon.emit('ToastDismissed');
                        this.TrayIcon.remove();
                        handled = true;
                    }
                }
            });
            retVal.remove = function remove()
            {
                this.MessagePump.WindowsConsole._shell32.Shell_NotifyIconA(TrayIconFlags.NIM_DELETE, this.MessagePump.NotifyData);
                this.MessagePump.stop();
                delete this.MessagePump.TrayIcon;
                delete this.MessagePump;
            };
            return (retVal);
            
        };
    }
}

module.exports = new WindowsConsole();