import logging

import traceback

import formencode

from formencode import htmlfill

from operator import itemgetter

from pylons import request, response, session, tmpl_context as c, url

from pylons.controllers.util import abort, redirect

from pylons.i18n.translation import _

from rhodecode.lib import helpers as h

from rhodecode.lib.base import BaseController, render

from rhodecode.model.db import Group

from rhodecode.model.repos_group import ReposGroupModel

from rhodecode.model.forms import ReposGroupForm

log = logging.getLogger(__name__)

class ReposGroupsController(BaseController):

    """REST Controller styled on the Atom Publishing Protocol"""

    # To properly map this controller, ensure your config/routing.py

    # file has a resource setup:

    #     map.resource('repos_group', 'repos_groups')

    @LoginRequired()

    def __before__(self):

        super(ReposGroupsController, self).__before__()

    def __load_defaults(self):

        c.repo_groups = [('', '')]

        parents_link = lambda k: h.literal('»'.join(k))

        c.repo_groups.extend([(x.group_id, parents_link(x.full_path_splitted))

                              for x in self.sa.query(Group).all()])

        c.repo_groups = sorted(c.repo_groups,

                               key=lambda t: t[1].split('»')[0])

        c.repo_groups_choices = map(lambda k: unicode(k[0]), c.repo_groups)

    def __load_data(self, group_id):

        """

        Load defaults settings for edit, and update

        :param group_id:

        """

        self.__load_defaults()

        repo_group = Group.get(group_id)

        data = repo_group.get_dict()

        data['group_name'] = repo_group.name

        return data

    @HasPermissionAnyDecorator('hg.admin')

    def index(self, format='html'):

                                          old_data=c.repos_group.get_dict(),

                                          available_groups=

                                            c.repo_groups_choices)()

        try:

            form_result = repos_group_form.to_python(dict(request.POST))

            repos_group_model.update(id, form_result)

            h.flash(_('updated repos group %s') \

                    % form_result['group_name'], category='success')

            #TODO: in futureaction_logger(, '', '', '', self.sa)

        except formencode.Invalid, errors:

            return htmlfill.render(

                render('admin/repos_groups/repos_groups_edit.html'),

                defaults=errors.value,

                errors=errors.error_dict or {},

                prefix_error=False,

                encoding="UTF-8")

        except Exception:

            log.error(traceback.format_exc())

            h.flash(_('error occurred during update of repos group %s') \

                    % request.POST.get('group_name'), category='error')

        return redirect(url('repos_groups'))

    @HasPermissionAnyDecorator('hg.admin')

    def delete(self, id):

        """DELETE /repos_groups/id: Delete an existing item"""

        # Forms posted to this method should contain a hidden field:

        #    <input type="hidden" name="_method" value="DELETE" />

        # Or using helpers:

        #    h.form(url('repos_group', id=ID),

        #           method='delete')

        # url('repos_group', id=ID)

        repos_group_model = ReposGroupModel()

        gr = Group.get(id)

        repos = gr.repositories.all()

        if repos:

            h.flash(_('This group contains %s repositores and cannot be '

                      'deleted' % len(repos)),

                    category='error')

            return redirect(url('repos_groups'))

        try:

            repos_group_model.delete(id)

            h.flash(_('removed repos group %s' % gr.group_name), category='success')

            #TODO: in future action_logger(, '', '', '', self.sa)

        except Exception:

            log.error(traceback.format_exc())

        return redirect(url('repos_groups'))

    def show_by_name(self, group_name):

        id_ = Group.get_by_group_name(group_name).group_id

        return self.show(id_)

    def show(self, id, format='html'):

        """GET /repos_groups/id: Show a specific item"""

        # url('repos_group', id=ID)

        c.group = Group.get(id)

        if c.group:

            c.group_repos = c.group.repositories.all()

        else:

            return redirect(url('home'))

        #overwrite our cached list with current filter

        gr_filter = c.group_repos

        c.cached_repo_list = self.scm_model.get_repos(all_repos=gr_filter)

        c.repos_list = c.cached_repo_list

        c.repo_cnt = 0

        c.groups = self.sa.query(Group).order_by(Group.group_name)\

            .filter(Group.group_parent_id == id).all()

        return render('admin/repos_groups/repos_groups.html')

    @HasPermissionAnyDecorator('hg.admin')

    def edit(self, id, format='html'):

        """GET /repos_groups/id/edit: Form to edit an existing item"""

        # url('edit_repos_group', id=ID)

        id_ = int(id)

        c.repos_group = Group.get(id_)

        defaults = self.__load_data(id_)

        # we need to exclude this group from the group list for editing

        c.repo_groups = filter(lambda x:x[0] != id_, c.repo_groups)

        return htmlfill.render(

            render('admin/repos_groups/repos_groups_edit.html'),

            defaults=defaults,

            encoding="UTF-8",

        makes repositories group on filesystem

        :param repo_name:

        :param parent_id:

        """

        create_path = os.path.join(self.repos_path, group_name)

        log.debug('creating new group in %s', create_path)

        if os.path.isdir(create_path):

            raise Exception('That directory already exists !')

        os.makedirs(create_path)

    def __rename_group(self, old, new):

        """

        Renames a group on filesystem

        :param group_name:

        """

        if old == new:

            log.debug('skipping group rename')

            return

        log.debug('renaming repos group from %s to %s', old, new)

        old_path = os.path.join(self.repos_path, old)

        new_path = os.path.join(self.repos_path, new)

        log.debug('renaming repos paths from %s to %s', old_path, new_path)

        if os.path.isdir(new_path):

            raise Exception('Was trying to rename to already '

                            'existing dir %s' % new_path)

        shutil.move(old_path, new_path)

    def __delete_group(self, group):

        """

        Deletes a group from a filesystem

        :param group: instance of group from database

        """

        paths = group.full_path.split(Group.url_sep())

        paths = os.sep.join(paths)

        rm_path = os.path.join(self.repos_path, paths)

        os.rmdir(rm_path)

    def create(self, form_data):

        try:

            new_repos_group = Group()

            new_repos_group.group_description = form_data['group_description']

            new_repos_group.parent_group = Group.get(form_data['group_parent_id'])

            new_repos_group.group_name = new_repos_group.get_new_name(form_data['group_name'])

            self.sa.add(new_repos_group)

            self.__create_group(new_repos_group.group_name)

            self.sa.commit()

            return new_repos_group

        except:

            log.error(traceback.format_exc())

            self.sa.rollback()

            raise

    def update(self, repos_group_id, form_data):

        try:

            repos_group = Group.get(repos_group_id)

            old_path = repos_group.full_path

            #change properties

            repos_group.group_description = form_data['group_description']

            repos_group.parent_group = Group.get(form_data['group_parent_id'])

            repos_group.group_name = repos_group.get_new_name(form_data['group_name'])

            new_path = repos_group.full_path

            self.sa.add(repos_group)

            self.__rename_group(old_path, new_path)

            # we need to get all repositories from this new group and 

            # rename them accordingly to new group path

            for r in repos_group.repositories:

                r.repo_name = r.get_new_name(r.just_name)

                self.sa.add(r)

            self.sa.commit()

            return repos_group

        except:

            log.error(traceback.format_exc())

            self.sa.rollback()