import binascii

from webob.exc import HTTPNotFound

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

from pylons.controllers.util import abort, redirect

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

log = logging.getLogger(__name__)

class CompareController(BaseRepoController):

    @LoginRequired()

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

                                   'repository.admin')

    def __before__(self):

        super(CompareController, self).__before__()

    def _get_discovery(self, org_repo, org_ref, other_repo, other_ref):

        from mercurial import discovery

        other = org_repo._repo

        repo = other_repo._repo

        tip = other[org_ref[1]]

        log.debug('Doing discovery for %s@%s vs %s@%s' % (

                        org_repo, org_ref, other_repo, other_ref)

        )

        log.debug('Filter heads are %s[%s]' % (tip, org_ref[1]))

        tmp = discovery.findcommonincoming(

                  repo=repo,  # other_repo we check for incoming

                  remote=other,  # org_repo source for incoming

                  heads=[tip.node()],

                  force=False

        )

        return tmp

    def _get_changesets(self, org_repo, org_ref, other_repo, other_ref, tmp):

        changesets = []

        #case two independent repos

        if org_repo != other_repo:

            common, incoming, rheads = tmp

            if not incoming:

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

        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)

        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

        discovery_data = self._get_discovery(org_repo.scm_instance,

                                           org_ref,

                                           other_repo.scm_instance,

                                           other_ref)

        c.cs_ranges = self._get_changesets(org_repo.scm_instance,

                                           org_ref,

                                           other_repo.scm_instance,

                                           other_ref,

                                           discovery_data)

        c.org_ref = org_ref[1]

        c.other_ref = other_ref[1]

        # diff needs to have swapped org with other to generate proper diff

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

                             discovery_data)

        diff_processor = diffs.DiffProcessor(_diff, format='gitdiff')

        _parsed = diff_processor.prepare()

        c.files = []

        c.changes = {}

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

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

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

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

        return render('compare/compare_diff.html')

    ${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">

            <div class="container">

            <table class="compare_view_commits noborder">

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

                <tr>

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

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

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

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

                <td><div class="message">${h.urlify_commit(h.wrap_paragraphs(cs.message),c.repo_name)}</div></td>

                </tr>

            %endfor

            </table>

            </div>

            <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">