#!/usr/bin/python
from __future__ import print_function

import sys
import apt
import apt_pkg
import os
import re

if len(sys.argv) < 3:
    print("usage: %s FILE PACKAGE..." % sys.argv[0], file=sys.stderr)
    sys.exit(1)

message_file = open(sys.argv[1])
packages = sys.argv[2:]

cache = apt.Cache()
errors = False
for p in packages:
    if p not in cache:
        print("error: no such package:", p, file=sys.stderr)
        errors = True
if errors:
    sys.exit(2)

h_subject = None
h_to = 'submit@bugs.debian.org'
h_bug = {'Severity' : 'grave',
         'Tags' : 'security'}
re_header = re.compile('^([a-zA-Z0-9-]+):\s*(\S.*?)\s*$')
source_lines = message_file.readlines()
state = 0
body = []
for line in source_lines:
    if state == 1:
        body.append(line)
        continue
        
    if line == '\n':
        if h_subject is None:
            print("error: missing Subject header", file=sys.stderr)
            sys.exit(2)
        state = 1
        continue

    # state == 0
    match = re_header.match(line)
    if match is None:
        print("error: invalid line:", line, file=sys.stderr)
        sys.exit(2)
    (k, v) = match.groups()
    if k == "Subject":
        h_subject = v
        continue
    if k in h_bug:
        h_bug[k] = v
        continue
    print("error: invalid header field:", k, file=sys.stderr)
    sys.exit(2)

def make_message(pkg):
    yield "To: %s\nSubject: %s\n\n" % (h_to, h_subject)
    yield "Package: %s\n" % pkg
    for x in h_bug.iteritems():
        yield "%s: %s\n" % x
    yield "\n"
    for x in body:
        yield x

def sendmail(lines):
    p = os.popen("/usr/lib/sendmail -oee -i -t", "w")
    closed = False
    try:
        for x in lines:
            p.write(x)
    finally:
        p.close()

for p in packages:
    sendmail(make_message(p))

for p in packages:
    print("\t- %s <unfixed> (bug filed)" % p)