from kallithea.lib.vcs.exceptions import EmptyRepositoryError, RepositoryError

from kallithea.lib.vcs.utils import safe_str

from kallithea.lib.vcs.utils.hgcompat import unionrepo

from kallithea.lib import helpers as h

from kallithea.lib.base import BaseRepoController, render

from kallithea.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator

from kallithea.lib import diffs

from kallithea.model.db import Repository

from kallithea.lib.diffs import LimitedDiffContainer

from kallithea.controllers.changeset import anchor_url, _ignorews_url,\

    _context_url, get_line_ctx, get_ignore_ws

log = logging.getLogger(__name__)

class CompareController(BaseRepoController):

    def __before__(self):

        super(CompareController, self).__before__()

    def __get_rev_or_redirect(self, ref, repo, redirect_after=True,

                              partial=False):

        """

        c.other_repo = other_repo

        c.org_ref_name = org_ref_name

        c.other_ref_name = other_ref_name

        c.org_ref_type = org_ref_type

        c.other_ref_type = other_ref_type

        c.cs_ranges, c.cs_ranges_org, c.ancestor = self._get_changesets(

            org_repo.scm_instance.alias, org_repo.scm_instance, c.org_rev,

            other_repo.scm_instance, c.other_rev)

        c.statuses = c.db_repo.statuses(

            [x.raw_id for x in c.cs_ranges])

        if partial:

            return render('compare/compare_cs.html')

        if merge and c.ancestor:

            # case we want a simple diff without incoming changesets,

            # previewing what will be merged.

            # Make the diff on the other repo (which is known to have other_rev)

            log.debug('Using ancestor %s as rev1 instead of %s'

                      % (c.ancestor, c.org_rev))

            rev1 = c.ancestor

            org_repo = other_repo

        else: # comparing tips, not necessarily linearly related

            if merge:

    <div class="ancestor">${_('Ancestor')}:

      ${h.link_to(h.short_id(c.ancestor),h.url('changeset_home',repo_name=c.repo_name,revision=c.ancestor))}

    </div>

    %endif

    <div id="graph_nodes">

        <canvas id="graph_canvas"></canvas>

    </div>

    <div id="graph_content_pr" style="margin-left: 100px;">

    <table class="compare_view_commits noborder">

        <tr id="chg_${cnt+1}">

        <td style="width:50px">

          %if cs.raw_id in c.statuses:

            <div title="${_('Changeset status: %s') % c.statuses[cs.raw_id][1]}" class="changeset-status-ico">

                <img height="16" width="16" src="${h.url('/images/icons/flag_status_%s.png' % c.statuses[cs.raw_id][0])}" />

            </div>

          %endif

        </td>

        <td style="width: 140px"><span class="tooltip" title="${h.tooltip(h.age(cs.date))}">${cs.date}</span></td>

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

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

        <td>${h.link_to(h.show_id(cs),h.url('changeset_home',repo_name=c.other_repo.repo_name,revision=cs.raw_id))}</td>

      ## TODO: list actual changesets?

      <div style="font-size:1.1em;font-weight: bold;clear:both;padding-top:10px">

        ${h.link_to_ref(c.other_repo.repo_name, c.other_ref_type, c.other_ref_name, c.other_rev)}

        ${_('is')}

        <a href="${c.swap_url}">${_('%s changesets') % (len(c.cs_ranges_org))}</a>

        ${_('behind')}

        ${h.link_to_ref(c.org_repo.repo_name, c.org_ref_type, c.org_ref_name, c.org_rev)}

      </div>

    %endif

  %endif

</div>

<script type="text/javascript" src="${h.url('/js/graph.js')}"></script>

%endif

<script type="text/javascript">

    $(document).ready(function(){

%if not c.as_form:

        var jsdata = ${c.jsdata|n};

        var r = new BranchRenderer('graph_canvas', 'graph_content_pr');

        r.render(jsdata,100);

%endif

        <div style="float:left;padding:0px 30px 30px 30px">

           ## overview pulled by ajax

           <div style="float:left" id="pull_request_overview"></div>

        </div>

        <div style="clear:both;"></div>

    </div>

    ${h.end_form()}

</div>

<script type="text/javascript">

  var _USERS_AC_DATA = ${c.users_array|n};

  var _GROUPS_AC_DATA = ${c.user_groups_array|n};

  PullRequestAutoComplete('user', 'reviewers_container', _USERS_AC_DATA, _GROUPS_AC_DATA);

  var other_repos_info = ${c.other_repos_info|n};

  var otherrepoChanged = function(){

      var sel_box = YUQ('#pull_request_form #other_repo')[0];

      var repo_name = sel_box.options[sel_box.selectedIndex].value;

      var _tmpl = "<b>${_('Destination repository')}</b>: {0}".format(other_repos_info[repo_name]['description']);

      YUD.get('other_repo_desc').innerHTML = _tmpl

      var rev_data = {

          '__org_repo__': org_repo,

          '__org_ref_name__': org_ref[2],

          '__other_repo__': other_repo,

          '__other_ref_name__': other_ref[2],

      }; // gather the org/other ref and repo here

      for (k in rev_data){

          url = url.replace(k,rev_data[k]);

      }

      YUD.get('pull_request_overview').innerHTML = "${_('Loading ...')}";

  }

  ## refresh automatically when something changes (org_repo can't change)

  YUE.on('org_ref', 'change', function(e){

     loadPreview();

  });

  YUE.on('other_repo', 'change', function(e){

      otherrepoChanged();

      loadPreview();

  });