#!/usr/bin/expect -f

proc setup {} {
  set timeout 1
  exp_internal 0
  log_user 0
  set ::env(DISPLAY) :0
  spawn sh -c "screen -wipe"
  spawn sh -c "screen -rx dialer || screen -S dialer /dev/ttyUSB2 115200"
  sleep 0.3
  set modem_pid $spawn_id
  sleep 0.2

  # Set audio routing
  messagemodem $modem_pid "AT+QDAI=1,0,0,2,0,1,1,1;\r" 1
  # Setup text message to immediatly show text response on +CMT recvs
  messagemodem $modem_pid "AT+CNMI=1,2,0,1,0;\r" 1
  # Set message format as PDU
  messagemodem $modem_pid "AT+CMGF=0;\r" 1

  return $modem_pid
}

proc messagemodem {modem_pid message fatal} {
  send -i $modem_pid $message
  expect {
    -i $modem_pid "OK" {
        return 1
    }
  }
  if {$fatal} {
        puts "Couldn't run command on modem: $message"
        exit
  }
  return 0
}

set modem_pid [setup]
sleep 0.2

# E.g. consume the thing
expect -i $modem_pid eof

proc writenumber {number} {
	exec sh -c "echo '$number' > /tmp/sxmo_incomingcall"
	puts "Ring for incoming call: <$number>"
	spawn sxmo_setpineled blue 0
	sleep 0.3
}

proc ring {modem_pid} {
	send -i $modem_pid "AT+CLCC\r"
	expect {
		-i $modem_pid -re {\n\+CLCC: 4,.+\+(\d+)} { writenumber $expect_out(1,string) }
		-i $modem_pid -re {\n\+CLCC: 3} { writenumber "UNKNOWN" }
	}
}

proc textmsg {modem_pid pdutext} {
  puts "New text msg - pdu text $pdutext"
  spawn sxmo_pdudecode $pdutext
  wait
  expect -i $spawn_id -re {Date: ([\-0-9]+)\r\nNumber: \+?([^\n]+)\r\nMessage:\r\n(.+)$} { puts "Matched ok"; }
  set date $expect_out(1,string)
  set number $expect_out(2,string)
  set msg [string trim $expect_out(3,string)]

  puts "<date: $date>"
  puts "<number: $number>"
  puts "<msg: $msg>"

  spawn date "+%Y/%m/%d %H:%M:%S" -d "@$date"
  wait
  expect
  set prettydate [string trim $expect_out(buffer)]

  set USER $::env(USER)
  spawn mkdir -p "/home/$USER/.sxmo/$number"
  wait
  set fp "/home/$USER/.sxmo/$number/log.txt"

  set logf [open $fp a]
  puts $logf "$number at \[$prettydate\]:\n$msg\n"
  close $logf
}

proc nocarrier {modem_pid} {
	spawn sxmo_setpineled blue 0
	exec sh -c "rm -f /tmp/sxmo_incomingcall"
	puts "No carrier"
}

while 1 {
	set is_ringing 0
	set timeout 2
	expect {
		-i $modem_pid -re {\nRING\r} {ring $modem_pid; set is_ringing 1}
		-i $modem_pid -re {\nNO CARRIER\r} {nocarrier $modem_pid; set is_ringing 0}
		-i $modem_pid -re {\n\+CMT: \S+\r\n([0-9A-F]+)} {textmsg $modem_pid $expect_out(1,string)}	}
	if { $is_ringing } {
		spawn sxmo_setpineled blue 1
	} else {
		spawn sxmo_setpineled blue 0
	}

	sleep 2
}