# -*- coding: utf-8 -*-

"""

    rhodecode.controllers.compare

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    compare controller for pylons showoing differences between two

    repos, branches, bookmarks or tips

    :created_on: May 6, 2012

    :author: marcink

    :copyright: (C) 2010-2012 Marcin Kuzminski <marcin@python-works.com>

    :license: GPLv3, see COPYING for more details.

"""

# 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 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.utils2 import str2bool

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:

            type_, rev = rev

            return repo.scm_instance.get_changeset(rev)

        except EmptyRepositoryError, e:

            if not redirect_after:

                return None

            h.flash(h.literal(_('There are no changesets yet')),

                    category='warning')

            redirect(url('summary_home', repo_name=repo.repo_name))

        except RepositoryError, e:

            log.error(traceback.format_exc())

            h.flash(str(e), category='warning')

            if not partial:

                redirect(h.url('summary_home', repo_name=repo.repo_name))

            raise HTTPBadRequest()

    def index(self, org_ref_type, org_ref, other_ref_type, other_ref):

        org_repo = c.rhodecode_db_repo.repo_name

        org_ref = (org_ref_type, org_ref)

        other_ref = (other_ref_type, other_ref)

        other_repo = request.GET.get('repo', org_repo)

        bundle_compare = str2bool(request.GET.get('bundle', True))

        c.swap_url = h.url('compare_url', repo_name=other_repo,

              org_ref_type=other_ref[0], org_ref=other_ref[1],

              other_ref_type=org_ref[0], other_ref=org_ref[1],

              repo=org_repo, as_form=request.GET.get('as_form'),

              bundle=bundle_compare)

        c.org_repo = org_repo = Repository.get_by_repo_name(org_repo)

        c.other_repo = other_repo = Repository.get_by_repo_name(other_repo)

        if c.org_repo is None or c.other_repo is None:

            log.error('Could not found repo %s or %s' % (org_repo, other_repo))

            raise HTTPNotFound

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

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

            raise HTTPNotFound

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

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

            raise HTTPNotFound

        partial = request.environ.get('HTTP_X_PARTIAL_XHR')

        self.__get_cs_or_redirect(rev=org_ref, repo=org_repo, partial=partial)

        self.__get_cs_or_redirect(rev=other_ref, repo=other_repo, partial=partial)

        c.cs_ranges, discovery_data = 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])

        c.target_repo = c.repo_name

        # 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 not bundle_compare and c.cs_ranges:

            # case we want a simple diff without incoming changesets, just

            # for review purposes. Make the diff on the forked repo, with

            # revision that is common ancestor

            other_ref = ('rev', c.cs_ranges[-1].parents[0].raw_id)

            other_repo = org_repo

        c.org_ref = org_ref[1]

        c.other_ref = other_ref[1]

        _diff = diffs.differ(other_repo, other_ref, org_repo, org_ref,

                             discovery_data, bundle_compare=bundle_compare)

        _parsed = diff_processor.prepare()

        c.files = []

        c.changes = {}

        for f in _parsed:

            fid = h.FID('', f['filename'])

            c.files.append([fid, f['operation'], f['filename'], f['stats']])

            diff = diff_processor.as_html(enable_comments=False, parsed_lines=[f])

            c.changes[fid] = [f['operation'], f['filename'], diff]

        return render('compare/compare_diff.html')

## Changesets table !

<div class="container">

  <table class="compare_view_commits noborder">

  %if not c.cs_ranges:

    <tr><td>${_('No changesets')}</td></tr>

  %else:

    %for cnt, cs in enumerate(c.cs_ranges):

        <tr>

        <td><div class="gravatar"><img alt="gravatar" src="${h.gravatar_url(h.email_or_none(cs.author),14)}"/></div></td>

        <td>

          %if cs.raw_id in c.statuses:

            <div title="${c.statuses[cs.raw_id][1]}" class="changeset-status-ico"><img src="${h.url('/images/icons/flag_status_%s.png' % c.statuses[cs.raw_id][0])}" /></div>

          %endif

        </td>

        <td>${h.link_to('r%s:%s' % (cs.revision,h.short_id(cs.raw_id)),h.url('changeset_home',repo_name=c.target_repo,revision=cs.raw_id))}

        %if c.as_form:

          ${h.hidden('revisions',cs.raw_id)}

        %endif

        </td>

        <td><div class="author">${h.person(cs.author)}</div></td>

        </tr>

    %endfor

  %endif

  </table>

</div>

<%inherit file="/base/base.html"/>

<%def name="title()">

    ${c.repo_name} ${_('Compare')} ${'%s@%s' % (c.org_repo.repo_name, c.org_ref)} -> ${'%s@%s' % (c.other_repo.repo_name, c.other_ref)}

</%def>

<%def name="breadcrumbs_links()">

    ${h.link_to(_(u'Home'),h.url('/'))}

    »

    ${h.link_to(c.repo_name,h.url('summary_home',repo_name=c.repo_name))}

    »

    ${_('Compare')}

</%def>

<%def name="page_nav()">

    ${self.menu('changelog')}

</%def>

<%def name="main()">

<div class="box">

    <!-- box / title -->

    <div class="title">

        ${self.breadcrumbs()}

    </div>

    <div class="table">

        <div id="body" class="diffblock">

            <div class="code-header cv">

                <h3 class="code-header-title">${_('Compare View')}</h3>

                <div>

                ${'%s@%s' % (c.org_repo.repo_name, c.org_ref)} -> ${'%s@%s' % (c.other_repo.repo_name, c.other_ref)}  <a href="${c.swap_url}">[swap]</a>

                </div>

            </div>

        </div>

        <div id="changeset_compare_view_content">

            ##CS

            <div style="font-size:1.1em;font-weight: bold;clear:both;padding-top:10px">${_('Outgoing changesets')}</div>

            <%include file="compare_cs.html" />

            ## FILES

            <div style="font-size:1.1em;font-weight: bold;clear:both;padding-top:10px">${_('Files affected')}</div>

            <div class="cs_files">

              %for fid, change, f, stat in c.files:

                  <div class="cs_${change}">

                    <div class="node">${h.link_to(h.safe_unicode(f),h.url.current(anchor=fid))}</div>

                    <div class="changes">${h.fancy_file_stats(stat)}</div>

                  </div>

              %endfor

            </div>

        </div>

    </div>

    ## diff block

    <%namespace name="diff_block" file="/changeset/diff_block.html"/>

    %for fid, change, f, stat in c.files:

      ${diff_block.diff_block_simple([c.changes[fid]])}

    %endfor

     <script type="text/javascript">

      YUE.onDOMReady(function(){

          YUE.on(YUQ('.diff-menu-activate'),'click',function(e){

              var act = e.currentTarget.nextElementSibling;

              if(YUD.hasClass(act,'active')){

                  YUD.removeClass(act,'active');

                  YUD.setStyle(act,'display','none');

              }else{

                  YUD.addClass(act,'active');

                  YUD.setStyle(act,'display','');

              }

          });

      })

    </script>

    </div>

</%def>