//go:build windows

package remote

import (
	"github.com/KarpelesLab/vncpasswd"
	"github.com/kardianos/service"
	"golang.org/x/sys/windows/registry"
)

var VncService service.Service

// ReadVncServerConfig 从注册表读取 TightVNC 服务端配置
func ReadVncServerConfig() (VncServerConfig, error) {
	config := VncServerConfig{
		ExtraPorts:                  "",
		QueryTimeout:                0,
		QueryAcceptOnTimeout:        0,
		LocalInputPriorityTimeout:   0,
		LocalInputPriority:          0,
		BlockRemoteInput:            0,
		BlockLocalInput:             0,
		IpAccessControl:             "",
		RfbPort:                     0,
		HttpPort:                    0,
		DisconnectAction:            0,
		AcceptRfbConnections:        0,
		UseVncAuthentication:        0,
		UseControlAuthentication:    0,
		RepeatControlAuthentication: 0,
		LoopbackOnly:                0,
		AcceptHttpConnections:       0,
		LogLevel:                    0,
		EnableFileTransfers:         0,
		RemoveWallpaper:             0,
		UseD3D:                      0,
		UseMirrorDriver:             0,
		EnableUrlParams:             0,
		Password:                    []byte{},
		AlwaysShared:                0,
		NeverShared:                 0,
		DisconnectClients:           0,
		PollingInterval:             0,
		AllowLoopback:               0,
		VideoRecognitionInterval:    0,
		GrabTransparentWindows:      0,
		SaveLogToAllUsersPath:       0,
		RunControlInterface:         0,
		IdleTimeout:                 0,
		VideoClasses:                "",
		VideoRects:                  "",
		ConnectToRdp:                0,
	}

	key, err := registry.OpenKey(registry.LOCAL_MACHINE, "SOFTWARE\\TightVNC\\Server", registry.ALL_ACCESS)
	if err != nil {
		return config, err
	}
	defer key.Close()

	config.ExtraPorts, _, _ = key.GetStringValue("ExtraPorts")
	config.QueryTimeout, _, _ = GetDwordValue(key, "QueryTimeout")
	config.QueryAcceptOnTimeout, _, _ = GetDwordValue(key, "QueryAcceptOnTimeout")
	config.LocalInputPriorityTimeout, _, _ = GetDwordValue(key, "LocalInputPriorityTimeout")
	config.LocalInputPriority, _, _ = GetDwordValue(key, "LocalInputPriority")
	config.BlockRemoteInput, _, _ = GetDwordValue(key, "BlockRemoteInput")
	config.BlockLocalInput, _, _ = GetDwordValue(key, "BlockLocalInput")
	config.IpAccessControl, _, _ = key.GetStringValue("IpAccessControl")
	config.RfbPort, _, _ = GetDwordValue(key, "RfbPort")
	config.HttpPort, _, _ = GetDwordValue(key, "HttpPort")
	config.DisconnectAction, _, _ = GetDwordValue(key, "DisconnectAction")
	config.AcceptRfbConnections, _, _ = GetDwordValue(key, "AcceptRfbConnections")
	config.UseVncAuthentication, _, _ = GetDwordValue(key, "UseVncAuthentication")
	config.UseControlAuthentication, _, _ = GetDwordValue(key, "UseControlAuthentication")
	config.RepeatControlAuthentication, _, _ = GetDwordValue(key, "RepeatControlAuthentication")
	config.LoopbackOnly, _, _ = GetDwordValue(key, "LoopbackOnly")
	config.AcceptHttpConnections, _, _ = GetDwordValue(key, "AcceptHttpConnections")
	config.EnableFileTransfers, _, _ = GetDwordValue(key, "EnableFileTransfers")
	config.RemoveWallpaper, _, _ = GetDwordValue(key, "RemoveWallpaper")
	config.UseD3D, _, _ = GetDwordValue(key, "UseD3D")
	config.UseMirrorDriver, _, _ = GetDwordValue(key, "UseMirrorDriver")
	config.EnableUrlParams, _, _ = GetDwordValue(key, "EnableUrlParams")
	config.Password, _, _ = key.GetBinaryValue("Password")
	config.AlwaysShared, _, _ = GetDwordValue(key, "AlwaysShared")
	config.NeverShared, _, _ = GetDwordValue(key, "NeverShared")
	config.DisconnectClients, _, _ = GetDwordValue(key, "DisconnectClients")
	config.PollingInterval, _, _ = GetDwordValue(key, "PollingInterval")
	config.AllowLoopback, _, _ = GetDwordValue(key, "AllowLoopback")
	config.VideoRecognitionInterval, _, _ = GetDwordValue(key, "VideoRecognitionInterval")
	config.GrabTransparentWindows, _, _ = GetDwordValue(key, "GrabTransparentWindows")
	config.SaveLogToAllUsersPath, _, _ = GetDwordValue(key, "SaveLogToAllUsersPath")
	config.RunControlInterface, _, _ = GetDwordValue(key, "RunControlInterface")
	config.IdleTimeout, _, _ = GetDwordValue(key, "IdleTimeout")
	config.VideoClasses, _, _ = key.GetStringValue("VideoClasses")
	config.VideoRects, _, _ = key.GetStringValue("VideoRects")
	config.ConnectToRdp, _, _ = GetDwordValue(key, "ExtraPorts")

	return config, nil
}

// GetDwordValue 读取 REG_DWORD 类型注册表值
func GetDwordValue(k registry.Key, name string) (val uint32, valtype uint32, err error) {
	val64 := uint64(0)
	val64, valtype, err = k.GetIntegerValue(name)
	val = uint32(val64)
	return
}

var vncSvcConfig = &service.Config{
	Name:        "tvnserver",
	DisplayName: "TightVNC Server",
	Description: "",
	Arguments:   []string{"-service"},
}

// InstallVncServer 安装VNC服务端 返回:结果,密码,错误
func InstallVncServer() (bool, string, error) {
	//安装服务
	//导入注册表
	//生成随机密码
	return true, "12345678", nil
}

// VncInit 初始化 VNC 服务对象，VncInstall/VncStart 等操作前必须调用
func VncInit() error {
	var err error
	VncService, err = service.New(nil, vncSvcConfig)
	if err != nil {
		return err
	}
	return nil
}

// VncInstall 安装 TightVNC 服务
func VncInstall() error {
	err := VncService.Install()
	if err != nil {
		return err
	}
	return nil
}

// VncUninstall 停止并卸载 TightVNC 服务
func VncUninstall() error {
	_ = VncService.Stop()
	err := VncService.Uninstall()
	if err != nil {
		return err
	}
	return nil
}

// VncStart 启动 TightVNC 服务
func VncStart() error {
	err := VncService.Start()
	if err != nil {
		return err
	}
	return nil
}

// VncStop 停止 TightVNC 服务
func VncStop() error {
	err := VncService.Stop()
	if err != nil {
		return err
	}
	return nil
}

// VncRestart 重启 TightVNC 服务
func VncRestart() error {
	err := VncService.Stop()
	if err != nil {
		return err
	}
	err = VncService.Start()
	if err != nil {
		return err
	}
	return nil
}

// VncPasswordCrypt 加密 VNC 密码（TightVNC 注册表存储格式）
func VncPasswordCrypt(password string) []byte {
	return vncpasswd.Crypt(password)
}

// VncPasswordDecrypt 解密 VNC 密码
func VncPasswordDecrypt(data []byte) string {
	return vncpasswd.Decrypt(data)
}