#!/usr/bin/expect --
# rsts-basic -- start a BASIC PLUS session on RSTS/E uploading a file
# Copyright (c) 2025 Renaud Fivet

set file_f [expr { $argv != ""}]
if { $file_f} {
    if [catch { set file [open $argv "r"]}] { puts "can't open $argv." ; exit }
    close $file
}

#spawn telnet pingouin.local 4000
spawn telnet elvira.stacken.kth.se 4000
#log_file session.log
set timeout 5
expect "<Dial-up>" { sleep 1 }

while 1 {
    expect {
        "User: " { send "99,99\r" ; break }
        timeout { send "\r" ; sleep 1 ; send "\r" ; puts "." }
    }
}

expect "Password: " { send "user\r" }
#expect "Ready\r\n\n" { send "NOEXTEND\r" }
expect "Ready\r\n\n" { send "SET WIDTH 132\r" }
expect "Ready\r\n\n" {
    if { $file_f } {
        set file [open $argv]
        if {[gets $file line] != -1} {
            set line [string trimleft $line]
            while 1 {
                set line [string toupper $line]
                set len [string length $line]
                while {$len > 40} {
                    set outs [string range $line 0 39]
                    set line [string range $line 40 end]
                    incr len -40
                    send -- $outs
                    expect -ex $outs
                }

                if {$len > 0} {
                    send -- $line
                    expect -ex $line
                }

                if {[gets $file line] == -1} {
                    send "\r"
                    expect "\r\n"
                    break
                }

                if {[regexp {^( *)([0-9]+)} $line]} {
                    set line [string trimleft $line]
                    send "\r"
                } else {
                    send "\n"
                }

                expect "\r\n"
            }
        }

        close $file
    }
}

puts ">>>"
interact