#Requires -Modules winscp

param
(
	[parameter(Mandatory = $true)]
	[ValidateNotNullOrEmpty()]
	[Alias("ipaddress")][String]$目的ip地址,

	[Alias("port")][uint16]$端口 = 21,

	[parameter(Mandatory = $true)]
	[ValidateNotNullOrEmpty()]
	[Alias("user")][String]$用户名,

	[parameter(Mandatory = $true)]
	[ValidateNotNullOrEmpty()]
	[Alias("pwd")][String]$密码,

	[parameter(Mandatory = $true)]
	[ValidateNotNullOrEmpty()]
	[String]$WinPath, #

	[parameter(Mandatory = $true)]
	[ValidateNotNullOrEmpty()]
	[String]$FtpD # 必须/开头。若是子目录，必须/结束，默认覆盖，默认连同子目录。files at ftpd
)

if ($env:LANG -eq 'zh_CN.UTF-8')
{
	Write-Host "信息：目标目录必须以‘/’开头。目标目录若是子目录，则必须以/结束。默认覆盖。默认连同子目录。"
}
else
{
	Write-Host "Info:The remote directory on ftpd must start with ‘/’. If the target directory is a subdirectory, it must end with /. Covered by default. By default together with subdirectories."
}

if ($IsLinux -eq $True)
{
	Write-Error "错误：不支持linux"
	exit 11
}

if ($FtpD[0] -eq '/')
{
}
else
{
	Write-Error "错误：源路径，请使用绝对目录。退出码2"
	exit 2
}

if (Test-Path -LiteralPath $WinPath)
{
}
else
{
	Write-Error "错误：找不到目标文件夹。退出码3"
	exit 3
}


if ( ($IsWindows -eq $True) -or ($PSVersionTable.psversion.major -lt 6) ) #win
{

	$端口通了 = & 'c:\ProgramData\kasini3000\tcp--ping-v5.ps1' -MyComputerName $目的ip地址 -port $端口 -Quiet
	if ($端口通了 -eq $true)
	{
	}
	else
	{
		if ($env:LANG -eq 'zh_CN.UTF-8')
		{
			Write-Error "错误：被控机端口不通。错误码24"
		}
		else
		{
			Write-Error "error：node port cloesd.exit 24"
		}
		exit 24
	}

	Import-Module -Name WinSCP -ErrorAction Stop

	Write-Verbose '使用ftp密码，连接开始'
	$用户密码密文 = ConvertTo-SecureString $密码 -AsPlainText -Force
	$我的登陆凭据 = New-Object System.Management.Automation.PSCredential ($用户名,$用户密码密文)
	$ftp连接参数 = New-WinSCPSessionOption -Protocol ftp -HostName $目的ip地址 -PortNumber $端口 -Credential $我的登陆凭据 -Timeout $([timespan]::FromSeconds(4))
	$private:连接91 = New-WinSCPSession -SessionOption $ftp连接参数
	if ($private:连接91 -eq $null)
	{
		Write-Error "使用ftp密码，在${目的ip地址}上连接失败。退出码31"
		exit 31
	}
	else
	{
		$密码连接成功 = $true
		Write-Verbose '使用ftp密码，连接成功。'
	}

	if ($密码连接成功 -eq $true)
	{
		Write-Verbose 'ftp下载文件开始。'

		$rtn = Receive-WinSCPItem -RemotePath $FtpD -LocalPath $WinPath -WinSCPSession $private:连接91

		if ( ($rtn -eq $null) -or ($rtn -eq '') )
		{
			$private:复制出错 = $true
		}
		else
		{
			$rtn
		}

		Write-Verbose 'ftp下载文件完成。'
	}

	Remove-WinSCPSession -WinSCPSession $private:连接91
}

if ($private:复制出错 -eq $true)
{
	if ($env:LANG -eq 'zh_CN.UTF-8')
	{
		Write-Error "错误：从ftpd服务器 ${目的ip地址} ，到本地，下载文件失败 。错误码1"
	}
	else
	{
		Write-Error "error：failed download from ftpd : ${目的ip地址} .exit 1"
	}
	exit 1
}
exit 0