#!/usr/bin/env python
#
# Copyright (C) 2008 Red Hat, Inc.
# Copyright (C) 2013 Alan Aguiar
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.


import operator
import os
import sys
import shutil
import subprocess
import re
import gettext
from optparse import OptionParser
import logging
from fnmatch import fnmatch
from ConfigParser import ConfigParser


IGNORE_DIRS = ['dist', '.git', 'debian', '.pc', 'locale']
IGNORE_FILES = ['.gitignore', 'MANIFEST', '*.pyc', '*~', '*.bak', 'pseudo.po']


def list_files(base_dir, ignore_dirs=None, ignore_files=None):
    result = []

    base_dir = os.path.abspath(base_dir)

    for root, dirs, files in os.walk(base_dir):
        if ignore_files:
            for pattern in ignore_files:
                files = [f for f in files if not fnmatch(f, pattern)]

        rel_path = root[len(base_dir) + 1:]
        for f in files:
            result.append(os.path.join(rel_path, f))

        if ignore_dirs and root == base_dir:
            for ignore in ignore_dirs:
                if ignore in dirs:
                    dirs.remove(ignore)

    return result


class Config(object):

    def __init__(self, source_dir=None, dist_dir=None, dist_name=None):
        self.source_dir = source_dir or os.getcwd()
        self.dist_dir = dist_dir or os.path.join(self.source_dir, 'dist')
        self.dist_name = dist_name
        self.bundle = None
        self.version = None
        self.activity_name = None
        self.bundle_id = None
        self.bundle_name = None
        self.bundle_root_dir = None
        self.tar_root_dir = None
        self.xo_name = None
        self.tar_name = None

        self.update()

    def update(self):
        cp = ConfigParser()
        info_file = os.path.abspath('./activity/activity.info')
        cp.read(info_file)

        if cp.has_option('Activity', 'activity_version'):
            self.version = cp.get('Activity', 'activity_version')
        else:
            print 'Activity bundle has invalid version number'

        if cp.has_option('Activity', 'name'):
            self.activity_name = cp.get('Activity', 'name')
        else:
            print 'Activity bundle does not specify a name'

        if cp.has_option('Activity', 'bundle_id'):
            self.bundle_id = cp.get('Activity', 'bundle_id')
        else:
            print 'Activity bundle does not specify a bundle id'

        self.bundle_name = reduce(operator.add, self.activity_name.split())
        self.bundle_root_dir = self.bundle_name + '.activity'
        self.tar_root_dir = '%s-%s' % (self.bundle_name, self.version)

        if self.dist_name:
            self.xo_name = self.tar_name = self.dist_name
        else:
            self.xo_name = '%s-%s.xo' % (self.bundle_name, self.version)
            self.tar_name = '%s-%s.tar.bz2' % (self.bundle_name, self.version)


class Builder(object):

    def __init__(self, config):
        self.config = config

    def build(self):
        self.build_locale()

    def build_locale(self):
        po_dir = os.path.join(self.config.source_dir, 'po')

        if not os.path.isdir(po_dir):
            logging.warn('Missing po/ dir, cannot build_locale')
            return

        locale_dir = os.path.join(self.config.source_dir, 'locale')

        if os.path.exists(locale_dir):
            shutil.rmtree(locale_dir)

        for f in os.listdir(po_dir):
            if not f.endswith('.po') or f == 'pseudo.po':
                continue

            file_name = os.path.join(po_dir, f)
            lang = f[:-3]

            localedir = os.path.join(self.config.source_dir, 'locale', lang)
            mo_path = os.path.join(localedir, 'LC_MESSAGES')
            if not os.path.isdir(mo_path):
                os.makedirs(mo_path)

            mo_file = os.path.join(mo_path, '%s.mo' % self.config.bundle_id)
            args = ['msgfmt', '--output-file=%s' % mo_file, file_name]
            retcode = subprocess.call(args)
            if retcode:
                print 'ERROR - msgfmt failed with return code %i.' % retcode
                exit (1)

            cat = gettext.GNUTranslations(open(mo_file, 'r'))
            translated_name = cat.gettext(self.config.activity_name)
            linfo_file = os.path.join(localedir, 'activity.linfo')
            f = open(linfo_file, 'w')
            f.write('[Activity]\nname = %s\n' % translated_name)
            f.close()

    def get_files(self):
        allfiles = list_files(self.config.source_dir,
                              IGNORE_DIRS, IGNORE_FILES)
        return allfiles


class Packager(object):

    def __init__(self, config):
        self.config = config
        self.package_path = None

        if not os.path.exists(self.config.dist_dir):
            os.mkdir(self.config.dist_dir)

    def get_files_in_git(self):
        git_ls = subprocess.Popen(['git', 'ls-files'], stdout=subprocess.PIPE,
                                  cwd=self.config.source_dir)
        stdout, _ = git_ls.communicate()
        if git_ls.returncode:
            # Fall back to filtered list
            return list_files(self.config.source_dir,
                              IGNORE_DIRS, IGNORE_FILES)

        # pylint: disable=E1103
        files = [path.strip() for path in stdout.strip('\n').split('\n')]

        # remove possible unnecesary tracked files
        for pattern in IGNORE_FILES:
            files = [f for f in files if not fnmatch(f, pattern)]
        return files

class XOPackager(Packager):

    def __init__(self, builder):
        Packager.__init__(self, builder.config)

        self.builder = builder
        self.builder.build_locale()
        self.package_path = os.path.join(self.config.dist_dir,
                                         self.config.xo_name)

    def package(self):
        import zipfile
        bundle_zip = zipfile.ZipFile(self.package_path, 'w',
                                     zipfile.ZIP_DEFLATED)

        for f in self.get_files_in_git():
            bundle_zip.write(os.path.join(self.config.source_dir, f),
                             os.path.join(self.config.bundle_root_dir, f))
        locale_dir = os.path.join(self.config.source_dir, 'locale')
        locale_files = list_files(locale_dir, IGNORE_DIRS, IGNORE_FILES)
        for f in locale_files:
            bundle_zip.write(os.path.join(locale_dir, f),
                             os.path.join(self.config.bundle_root_dir,
                                          'locale', f))

        bundle_zip.close()


class SourcePackager(Packager):

    def __init__(self, config):
        Packager.__init__(self, config)
        self.package_path = os.path.join(self.config.dist_dir,
                                         self.config.tar_name)

    def package(self):
        import tarfile
        tar = tarfile.open(self.package_path, 'w:bz2')
        for f in self.get_files_in_git():
            tar.add(os.path.join(self.config.source_dir, f),
                    os.path.join(self.config.tar_root_dir, f))
        tar.close()


class Installer(object):
    IGNORES = ['po/*', 'MANIFEST', 'AUTHORS']

    def __init__(self, builder):
        self.config = builder.config
        self.builder = builder

    def should_ignore(self, f):
        for pattern in self.IGNORES:
            if fnmatch(f, pattern):
                return True
        return False

    def install(self, prefix):
        self.builder.build()

        activity_path = os.path.join(prefix, 'share', 'sugar', 'activities',
                                     self.config.bundle_root_dir)

        source_to_dest = {}
        for f in self.builder.get_files():
            if self.should_ignore(f):
                pass
            elif f.startswith('locale/') and f.endswith('.mo'):
                source_to_dest[f] = os.path.join(prefix, 'share', f)
            else:
                source_to_dest[f] = os.path.join(activity_path, f)

        for source, dest in source_to_dest.items():
            print 'Install %s to %s.' % (source, dest)

            path = os.path.dirname(dest)
            if not os.path.exists(path):
                os.makedirs(path)

            shutil.copy(source, dest)

        self.config.bundle.install_mime_type(self.config.source_dir)


def cmd_dev(config, args):
    """Setup for development"""

    if args:
        print 'ERROR - Wrong argument.'
        print 'Usage: %prog dev'
        exit (1)

    bundle_path = os.path.expanduser('~/Activities')
    if not os.path.isdir(bundle_path):
        os.mkdir(bundle_path)
    bundle_path = os.path.join(bundle_path, config.bundle_root_dir)
    try:
        os.symlink(config.source_dir, bundle_path)
    except OSError:
        if os.path.islink(bundle_path):
            print 'ERROR - The bundle has been already setup for development.'
        else:
            print 'ERROR - A bundle with the same name is already installed.'


def cmd_dist_xo(config, args):
    """Create a xo bundle package"""

    if args:
        print 'ERROR - Wrong argument.'
        print 'Usage: %prog dist_xo'
        exit (1)

    packager = XOPackager(Builder(config))
    packager.package()


def cmd_fix_manifest(config, args):
    '''Add missing files to the manifest (OBSOLETE)'''

    print 'WARNING: The fix_manifest command is obsolete.'
    print '         The MANIFEST file is no longer used in bundles,'
    print '         please remove it.'


def cmd_dist_source(config, args):
    """Create a tar source package"""

    if args:
        print 'ERROR - Wrong argument.'
        print 'Usage: %prog dist_source'
        exit (1)

    packager = SourcePackager(config)
    packager.package()


def cmd_install(config, args):
    """Install the activity in the system"""

    parser = OptionParser(usage='usage: %prog install [options]')
    parser.add_option('--prefix', dest='prefix', default=sys.prefix,
                      help='Prefix to install files to')
    (suboptions, subargs) = parser.parse_args(args)
    if subargs:
        print 'ERROR - Wrong argument.'
        parser.print_help()
        exit (1)

    installer = Installer(Builder(config))
    installer.install(suboptions.prefix)


def cmd_genpot(config, args):
    """Generate the gettext pot file"""

    if args:
        print 'ERROR - Wrong argument.'
        print 'Usage: %prog genpot'
        exit (1)

    po_path = os.path.join(config.source_dir, 'po')
    if not os.path.isdir(po_path):
        os.mkdir(po_path)

    python_files = []
    for root, dirs_dummy, files in os.walk(config.source_dir):
        for file_name in files:
            if file_name.endswith('.py'):
                file_path = os.path.relpath(os.path.join(root, file_name),
                                            config.source_dir)
                python_files.append(file_path)

    # First write out a stub .pot file containing just the translated
    # activity name, then have xgettext merge the rest of the
    # translations into that. (We can't just append the activity name
    # to the end of the .pot file afterwards, because that might
    # create a duplicate msgid.)
    pot_file = os.path.join('po', '%s.pot' % config.bundle_name)
    escaped_name = re.sub('([\\\\"])', '\\\\\\1', config.activity_name)
    f = open(pot_file, 'w')
    f.write('#: activity/activity.info:2\n')
    f.write('msgid "%s"\n' % escaped_name)
    f.write('msgstr ""\n')
    f.close()

    args = ['xgettext', '--join-existing', '--language=Python',
        '--keyword=_', '--add-comments=TRANS:', '--output=%s' % pot_file]

    args += python_files
    retcode = subprocess.call(args)
    if retcode:
        print 'ERROR - xgettext failed with return code %i.' % retcode
        exit (1)


def cmd_build(config, args):
    """Build generated files"""

    if args:
        print 'ERROR - Wrong argument.'
        print 'Usage: %prog build'
        exit (1)

    builder = Builder(config)
    builder.build()


def print_commands():
    print 'Available commands:\n'

    for name, func in globals().items():
        if name.startswith('cmd_'):
            print '%-20s %s' % (name.replace('cmd_', ''), func.__doc__)

    print '\n(Type "./setup.py <command> --help" for help about a ' \
          'particular command\'s options.'


def start(bundle_name=None):
    if bundle_name:
        logging.warn('bundle_name deprecated, now comes from activity.info')

    parser = OptionParser(usage='[action] [options]')
    parser.disable_interspersed_args()
    (options_, args) = parser.parse_args()

    config = Config()

    try:
        globals()['cmd_' + args[0]](config, args[1:])
    except (KeyError, IndexError):
        print 'ERROR - Wrong command or argument.'
        print_commands()
        exit (1)


if __name__ == '__main__':
    start()
