# 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 logging

import traceback

from webob.exc import HTTPNotFound

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.vcs.exceptions import EmptyRepositoryError, RepositoryError

from rhodecode.lib import helpers as h

from rhodecode.lib.base import BaseRepoController, render

from rhodecode.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator

from rhodecode.lib import diffs

from rhodecode.model.db import Repository

from rhodecode.model.pull_request import PullRequestModel

from webob.exc import HTTPBadRequest

from rhodecode.lib.diffs import LimitedDiffContainer

log = logging.getLogger(__name__)

class CompareController(BaseRepoController):

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def __before__(self):

        super(CompareController, self).__before__()

    def __get_cs_or_redirect(self, rev, repo, redirect_after=True,

                             partial=False):

        """

        Safe way to get changeset if error occur it redirects to changeset with

        proper message. If partial is set then don't do redirect raise Exception

        instead

        :param rev: revision to fetch

        :param repo: repo instance

        """

        try:

        if org_repo != other_repo and h.is_git(org_repo):

            log.error('compare of two remote repos not available for GIT REPOS')

            raise HTTPNotFound

        if org_repo.scm_instance.alias != other_repo.scm_instance.alias:

            log.error('compare of two different kind of remote repos not available')

            raise HTTPNotFound

        c.org_repo = org_repo

        c.other_repo = other_repo

        c.org_ref = org_ref[1]

        c.other_ref = other_ref[1]

        c.org_ref_type = org_ref[0]

        c.other_ref_type = other_ref[0]

        if rev_start and rev_end:

            # swap revs with cherry picked ones, save them for display

            #org_ref = ('rev', rev_start)

            #other_ref = ('rev', rev_end)

            c.org_ref = rev_start[:12]

            c.other_ref = rev_end[:12]

            # get parent of

            # rev start to include it in the diff

            _cs = other_repo.scm_instance.get_changeset(rev_start)

            org_ref = ('rev', rev_start)

            other_ref = ('rev', rev_end)

            #if we cherry pick it's not remote, make the other_repo org_repo

            org_repo = other_repo

        c.cs_ranges, ancestor = PullRequestModel().get_compare_data(

            org_repo, org_ref, other_repo, other_ref)

        c.statuses = c.rhodecode_db_repo.statuses([x.raw_id for x in

                                                   c.cs_ranges])

        # defines that we need hidden inputs with changesets

        c.as_form = request.GET.get('as_form', False)

        if partial:

            return render('compare/compare_cs.html')

        if ancestor and org_repo != other_repo:

            # case we want a simple diff without incoming changesets,

            # previewing what will be merged.

            # Make the diff on the forked repo, with

            # revision that is common ancestor

            log.debug('Using ancestor %s as org_ref instead of %s'

                      % (ancestor, org_ref))

            org_ref = ('rev', ancestor)

            org_repo = other_repo