import java.io.File
import java.net.Socket
import java.util.*

fun main() {
    println("Destination mail: ")
    val destination = readLine()
    println("Subject:")
    val subject = readLine()
    println("Mail content: ")
    val mail = readLine()
    println("Attachment file: ")
    val filename = readLine()!!
    val file = File(filename)
    val content = Base64.getEncoder().encodeToString(file.readBytes())

    val boundary = UUID.randomUUID().toString().replace("-", "")

    val commands = listOf(
            "EHLO sendmail",
            "AUTH LOGIN",
            "TUTAJ LOGIN",
            "TUTAJ HASŁO",
            "MAIL FROM: <aaaaaaaa.aaaaaa@interia.pl>",
            "RCPT TO: <$destination>",
            "DATA",

            """Subject: $subject
From: aaaaaaaa.aaaaaa@interia.pl
To: $destination
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="$boundary"
""",
            """--$boundary
Content-Type: text/plain

$mail
""",
            """--$boundary
Content-Type: application/octet-stream; name="${file.name}"
Content-Disposition: attachment; filename="${file.name}"
Content-Transfer-Encoding: base64

$content

--$boundary--


.""",
            "QUIT"
    )

    Socket("poczta.interia.pl", 587).use {
        val inputStream = it.getInputStream()
        it.getOutputStream()
                .bufferedWriter()
                .apply {
                    commands.forEach { command ->
                        write(command)
                        newLine()
                        flush()
                    }
                }
    }
}