#!/usr/bin/env python3
import sys
import subprocess


def notify_send(subj, data):
    result = subprocess.run(["notify-send", "-t", "0", subj, data])
    if result.returncode == -127:
        print("error: notify-send program not found in PATH", file=sys.stderr)
        exit(1)
    elif result.returncode != 0:
        print("error: notify-send failed", file=sys.stderr)
        exit(1)


senders = {}

for i in range(2, len(sys.argv), 3):
    sender = sys.argv[i + 1]
    subj = sys.argv[i + 2]
    print(sender)
    print(subj)
    if sender not in senders:
        senders[sender] = subj
    elif isinstance(subj, str):
        senders[sender] = 2
    else:
        senders[sender] += 1

for sender, data in senders.items():
    if isinstance(data, str):
        notify_send("New mail from " + sender, data)
    else:
        notify_send("New mail from " + sender, str(data) + " unread messages")