# Copyright 2010-2015  Lars Wirzenius
#
# 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, either version 3 of the License, or
# (at your option) any later version.
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import cliapp
import os
import shutil
import string
import time

import jtlib


class FinishCommand(cliapp.Plugin):

    def enable(self):
        self.app.add_subcommand('finish', self.run, arg_synopsis='[DRAFT-ID]')

    def run(self, args):
        '''Publish a draft journal entry.'''

        drafts_dir = jtlib.DraftsDirectory(self.app.drafts_dir())

        draft_id, draft_mdwn = self.app.choose_draft(drafts_dir, args)
        draft_attch = drafts_dir.get_draft_attachments_dirname(draft_id)

        title = drafts_dir.get_draft_title(draft_id)
        if not title:
            raise Exception("%s has no title" % draft_mdwn)

        pub_attch = os.path.join(
            self._published_dir(),
            self._summarise_title(title))
        pub_mdwn = pub_attch + '.mdwn'

        if os.path.exists(pub_mdwn):
            raise cliapp.AppException('%s already exists' % pub_mdwn)

        self._publish_draft(draft_mdwn, draft_attch, pub_mdwn, pub_attch)

        if self.app.settings['git']:
            if os.path.exists(pub_attch):
                self._commit_to_git([pub_mdwn, pub_attch])
            else:
                self._commit_to_git([pub_mdwn])
            if self.app.settings['push']:
                self._push_git()

    def _published_dir(self):
        subdir = time.strftime('%Y/%m/%d', self.app.now_tuple)
        return os.path.join(
            self.app.settings['source'],
            self.app.settings['notes-dir'],
            subdir)

    def _summarise_title(self, title):
        basename = ''
        acceptable = set(string.ascii_letters + string.digits + '-_')
        for c in title.lower():
            if c in acceptable:
                basename += c
            elif not basename.endswith('_'):
                basename += '_'
        return basename

    def _publish_draft(self, draft_mdwn, draft_attch, pub_mdwn, pub_attch):
        parent_dir = os.path.dirname(pub_mdwn)
        if not os.path.exists(parent_dir):
            os.makedirs(parent_dir)
        os.rename(draft_mdwn, pub_mdwn)
        if os.path.exists(draft_attch):
            os.rename(draft_attch, pub_attch)

    def _commit_to_git(self, pathnames):
        jtlib.commit_to_git(self.app.settings['source'], pathnames)

    def _push_git(self):
        jtlib.push_git(self.app.settings['source'])