#!/usr/bin/python
#
# Copyright (C) 2007, Canonical Ltd.
# Copyright (C) 2010, Benjamin Drung <bdrung@ubuntu.com>
#
# It was initial written by Daniel Holbach.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 3.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# See file /usr/share/common-licenses/GPL-3 for more details.

import csv
import getopt
import lazr.restfulclient
import os
import re
import subprocess
import sys
import logging
import glob
import fnmatch

from ubuntutools.lp.libsupport import get_launchpad

COMMAND_LINE_SYNTAX_ERROR = 1
VERSION_DETECTION_FAILED = 2
PRIVATE_USER_EMAIL = 3

def get_version(title):
	m = re.search("[() ][0-9][0-9a-zA-Z.:+-~]*", title)
	if m is None:
		print >> sys.stderr, "Version could not be detected. Please specify it with -V."
		sys.exit(VERSION_DETECTION_FAILED)
	return m.group(0).strip("() ")

def strip_epoch(version):
	parts = version.split(':')
	if len(parts) > 1:
		del parts[0]
	version = ':'.join(parts)
	return version

def LogCall(command):
	command = map(str, command)
	logging.info("Running %s", " ".join(command))
	return command

def get_source(package, version, section, dist, uploader_name, uploader_email, bug, key):
	if os.path.isdir("/tmpfs"):
		workdir = "/tmpfs/ack-sync"
	else:
		workdir = "/tmp/ack-sync"
	if not os.path.isdir(workdir):
		os.makedirs(workdir)
	os.chdir(workdir)

	cmd = ["syncpackage", package, "-r", dist, "-V", version, "-b", str(bug)]
	if section is not None:
		cmd += ["-c", section]
	if uploader_email is not None:
		cmd += ["-e", uploader_email]
	if uploader_name is not None:
		cmd += ["-n", uploader_name]
	if key is not None:
		cmd += ["-k", key]
	subprocess.check_call(cmd)

	dsc_file = package + "_" + strip_epoch(version) + "fakesync1.dsc"
	if not os.path.exists(os.path.join(workdir, dsc_file)):
		dsc_file = package + "_" + strip_epoch(version) + ".dsc"
	if not os.path.exists(os.path.join(workdir, dsc_file)):
		print >> sys.stderr, "E: Failed to find .dsc file created by syncpackage."
		sys.exit(1)
	return dsc_file

def build_source(dist, dsc_file):
	try:
		if sbuild:
			subprocess.check_call(LogCall(["sbuild", "-d", dist,"-A", dsc_file]))
		else:
			if not os.path.isdir("buildresult"):
				os.makedirs("buildresult")
			cmd = ["sudo", "-E", "DIST=" + dist, pbuilder, "--build",
					"--buildresult", "buildresult", dsc_file]
			subprocess.check_call(LogCall(cmd))
	except subprocess.CalledProcessError:
		print >> sys.stderr, "E: %s failed to build." % (dsc_file)
		sys.exit(1)

def test_install(dist, dsc_file):
	changes_files=glob.glob(os.path.splitext(dsc_file)[0]+"_*.changes")
	changes_file = ""

	for temp_file in changes_files:
		if not fnmatch.fnmatch(temp_file, '*_source.changes'):
			changes_file = temp_file

	if not (os.path.isfile(changes_file)): # if no file exists at all => exit
		print >> sys.stderr, "E: No .changes file has been generated."
		sys.exit(1)

	try:
		cmd = ["sudo", "piuparts", "-N", "-W", "--single-changes-list",
				"--log-level=info", "--ignore=/var/log/apt/history.log",
				"--mirror=http://archive.ubuntu.com/ubuntu main universe restricted multiverse",
				changes_file]
		if sbuild:
			subprocess.check_call(LogCall(cmd + ["--lvm-volume="+lvm+"/"+dist+"_chroot"]))
		else:
			subprocess.check_call(LogCall(cmd + ["--pbuilder"]))
	except subprocess.CalledProcessError:
		print >> sys.stderr, "E: %s failed to install. Please check log" % (changes_file)

def get_email_from_file(name):
	filename = os.path.expanduser("~/.ack-sync-email.list")
	if os.path.isfile(filename):
		csvfile = open(filename)
		csv_reader = csv.reader(csvfile)
		for row in csv_reader:
			if row[0] == name:
				return row[1]
	return None

def main(bug_numbers, all_package, all_version, all_section, update,
         all_uploader_email, key, verbose=False, silent=False):
	launchpad = get_launchpad("ubuntu-dev-tools")
	# TODO: use release-info (once available)
	dist = launchpad.distributions["ubuntu"].current_series.name

	# update pbuilder
	if update:
		if sbuild:
			subprocess.call(LogCall(["sbuild-update", dist]))
		else:
			cmd = ["sudo", "env", "DIST=" + dist, pbuilder, "--update"]
			subprocess.call(LogCall(cmd))

	for bug_number in bug_numbers:
		bug = launchpad.bugs[bug_number]
		uploader_name = bug.owner.display_name
		if all_uploader_email is not None:
			uploader_email = all_uploader_email
		else:
			try:
				uploader_email =  bug.owner.preferred_email_address.email
			except ValueError:
				uploader_email = get_email_from_file(uploader_name)
				if uploader_email is None:
					if not silent:
						print >> sys.stderr, "E: Bug owner '%s' does not have a public email address. Specify uploader with '-e'." % (uploader_name)
					sys.exit(PRIVATE_USER_EMAIL)
				elif not silent:
					print "Taking email address from local file: " + uploader_email

		task = list(bug.bug_tasks)[0]

		if all_package is not None:
			package = all_package
		else:
			package = task.bug_target_name.split(" ")[0]
			if package == "ubuntu":
				words = bug.title.split(" ")
				# no source package was defined. Guessing that the second or
				# third word in the title is the package name, because most
				# titles start with "Please sync <package>" or "Sync <package>"
				if words[0].lower() == "please":
					package = words[2]
				else:
					package = words[1]
		if all_version is not None:
			version = all_version
		else:
			version = get_version(bug.title)
		print "package:", package
		print "version:", version
		dsc_file = get_source(package, version, all_section, dist,
		                      uploader_name, uploader_email, bug_number, key)

		# extract source
		subprocess.check_call(["dpkg-source", "-x", dsc_file])

		build_source(dist, dsc_file)
	
		if piuparts:
			test_install(dist, dsc_file)

		print bug.title
		print task.assignee
		print task.status
		print "Uploader:", uploader_name + " <" + uploader_email + ">"
		try:
			raw_input('Press [Enter] to continue or [Ctrl-C] to abort.')
		except KeyboardInterrupt:
			continue

		succeeded_unsubscribe = True
		ums = launchpad.people['ubuntu-main-sponsors']
		uus = launchpad.people['ubuntu-universe-sponsors']
		try:
			bug.unsubscribe(person=ums)
		except lazr.restfulclient.errors.HTTPError, http_error:
			print "failed to unsubscribe ubuntu-main-sponsors: " + http_error.content
			succeeded_unsubscribe = False
		try:
			bug.unsubscribe(person=uus)
		except lazr.restfulclient.errors.HTTPError, http_error:
			print "failed to unsubscribe ubuntu-universe-sponsors: " + http_error.content
			succeeded_unsubscribe = False
		if succeeded_unsubscribe:
			print "ubuntu-{main,universe}-sponsors unsubscribed (for backward compatibility)"

		us = launchpad.people['ubuntu-sponsors']
		bug.unsubscribe(person=us)
		print "ubuntu-sponsors unsubscribed"
		task.assignee = None
		print "unassigned me"
		if task.importance == "Undecided":
			task.importance = "Wishlist"
			print "importance set to Wishlist"
		task.lp_save()
		bug.subscribe(person=launchpad.me)
		print "subscribed me"
		changes_file = dsc_file[:-4] + "_source.changes"
		subprocess.check_call(["dput", "ubuntu", changes_file])

def usage():
	print """ack-sync <bug numbers>

  -e,                       specify uploader email address
  -h, --help                displays this help
  -k, --key                 key used to sign the package (in case of sponsoring)
  -l, --lvm                 lvm root dev directory, used for sbuild and piuparts
                            default is /dev/vg
  -p, --package=<package>   set the package
  -P, --with-piuparts       use piuparts to check the instalability
      --section=<section>   Debian section (one of main, contrib, non-free)
  -s, --silent              be more silent
  -S, --with-sbuild         use sbuild instead of pbuilder
  -C, --pbuilder=<command>  use <command> as pbuilder
  -u, --update              updates pbuilder before building
  -v, --verbose             be more verbosive
  -V, --version=<version>   set the version"""

if __name__ == '__main__':
	try:
		long_opts = ["help", "key=", "lvm=", "package=", "section=", "silent", "update",
				"verbose", "version=", "with-sbuild", 'pbuilder=', "with-piuparts"]
		opts, args = getopt.gnu_getopt(sys.argv[1:], "e:hk:p:PsSC:uvV:", long_opts)
	except getopt.GetoptError, e:
		# will print something like "option -a not recognized"
		print >> sys.stderr, str(e)
		sys.exit(COMMAND_LINE_SYNTAX_ERROR)

	package = None
	sbuild = False
	section = None
	silent = False
	update = False
	uploader_email = None
	verbose = False
	version = None
	piuparts = False
	pbuilder = 'pbuilder'
	lvm = "/dev/vg"
	key = None

	for o, a in opts:
		if o in ("-h", "--help"):
			usage()
			sys.exit()
		elif o in ("-e"):
			uploader_email = a
		elif o in ("-k", "--key"):
			key = a
		elif o in ("-l", "--lvm"):
			lvm = a
		elif o in ("-p", "--package"):
			package = a
		elif o in ("-P", "--with-piuparts"):
			piuparts = True
		elif o in ("--section"):
			section = a
		elif o in ("-s", "--silent"):
			silent = True
		elif o in ("-S", "--with-sbuild"):
			sbuild = True
		elif o in ("-C", "--pbuilder"):
		    pbuilder=a
		elif o in ("-u", "--update"):
			update = True
		elif o in ("-v", "--verbose"):
			verbose = True
		elif o in ("-V", "--version"):
			version = a
		else:
			assert False, "unhandled option"

	if len(args) == 0:
		if not silent:
			print >> sys.stderr, "E: You must specify at least one bug number."
		sys.exit(COMMAND_LINE_SYNTAX_ERROR)

	bug_numbers = []
	for arg in args:
		try:
			number = int(arg)
		except:
			if not silent:
				print >> sys.stderr, "E: '%s' is not a valid bug number." % arg
			sys.exit(COMMAND_LINE_SYNTAX_ERROR)
		bug_numbers.append(number)

	main(bug_numbers, package, version, section, update, uploader_email, key, verbose, silent)