# copyright 2010-2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr

#

# This file is part of CubicWeb.

#

# CubicWeb is free software: you can redistribute it and/or modify it under the

# terms of the GNU Lesser General Public License as published by the Free

# Software Foundation, either version 2.1 of the License, or (at your option)

# any later version.

#

# CubicWeb 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 Lesser General Public License for more

# details.

#

# You should have received a copy of the GNU Lesser General Public License along

# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.

"""Specific views for data sources and related entities (eg CWSource,

CWSourceHostConfig).

"""

import logging

from six.moves import range

from logilab.common.decorators import cachedproperty

from cubicweb import _

from cubicweb import Unauthorized, tags

from cubicweb.utils import make_uid

from cubicweb.predicates import (is_instance, score_entity, has_related_entities,

                                 match_user_groups, match_kwargs, match_view, one_line_rset)

from cubicweb.view import EntityView, StartupView

from cubicweb.web import Redirect, formwidgets as wdgs, facet, action

from cubicweb.web.views import add_etype_button

from cubicweb.web.views import (uicfg, tabs, actions, ibreadcrumbs, navigation,

                                tableview, pyviews)

_abaa = uicfg.actionbox_appearsin_addmenu

# there are explicit 'add' buttons for those

_abaa.tag_object_of(('CWDataImport', 'cw_import_of', '*'), False)

_afs = uicfg.autoform_section

_afs.tag_attribute(('CWSource', 'latest_retrieval'), 'main', 'hidden')

_afs.tag_attribute(('CWSource', 'in_synchronization'), 'main', 'hidden')

_affk = uicfg.autoform_field_kwargs

_affk.tag_attribute(('CWSource', 'parser'), {'widget': wdgs.TextInput})

# source primary views #########################################################

_pvs = uicfg.primaryview_section

_pvs.tag_attribute(('CWSource', 'name'), 'hidden')

_pvs.tag_object_of(('*', 'cw_host_config_of', 'CWSource'), 'hidden')

_pvdc = uicfg.primaryview_display_ctrl

_pvdc.tag_attribute(('CWSource', 'type'), {'vid': 'attribute'})# disable reledit

_rc = uicfg.reledit_ctrl

_rc.tag_attribute(('CWSource', 'config'), {'rvid': 'verbatimattr'})

_rc.tag_attribute(('CWSourceHostConfig', 'config'), {'rvid': 'verbatimattr'})

class CWSourcePrimaryView(tabs.TabbedPrimaryView):

    __select__ = is_instance('CWSource')

    tabs = [_('cwsource-main'), _('cwsource-imports')]

    default_tab = 'cwsource-main'

class CWSourceMainTab(tabs.PrimaryTab):

    __regid__ = 'cwsource-main'

    __select__ = is_instance('CWSource')

    def render_entity_attributes(self, entity):

        super(CWSourceMainTab, self).render_entity_attributes(entity)

        self.w(add_etype_button(self._cw, 'CWSourceHostConfig',

                                __linkto='cw_host_config_of:%s:subject' % entity.eid,

                                __redirectpath=entity.rest_path()))

        try:

            hostconfig = self._cw.execute(

                'Any X, XC, XH WHERE X cw_host_config_of S, S eid %(s)s, '

                'X config XC, X match_host XH', {'s': entity.eid})

        except Unauthorized:

            pass

        else:

            if hostconfig:

                self.w(u'<h3>%s</h3>' % self._cw._('CWSourceHostConfig_plural'))

                self._cw.view('table', hostconfig, w=self.w,

                              displaycols=list(range(2)),

                              cellvids={1: 'editable-final'})

class CWSourceImportsTab(EntityView):

    __regid__ = 'cwsource-imports'

    __select__ = (is_instance('CWSource')

                  & has_related_entities('cw_import_of', 'object'))

    def entity_call(self, entity):

        rset = self._cw.execute('Any X, XST, XET, XS ORDERBY XST DESC WHERE '

                                'X cw_import_of S, S eid %(s)s, X status XS, '

                                'X start_timestamp XST, X end_timestamp XET',

                                {'s': entity.eid})

        self._cw.view('cw.imports-table', rset, w=self.w)

class CWImportsTable(tableview.EntityTableView):

    __regid__ = 'cw.imports-table'

    __select__ = is_instance('CWDataImport')

    columns = ['import', 'start_timestamp', 'end_timestamp']

    column_renderers = {'import': tableview.MainEntityColRenderer()}

    layout_args = {'display_filter': 'top'}

class CWSourceSyncAction(action.Action):

    __regid__ = 'cw.source-sync'

    __select__ = (action.Action.__select__ & match_user_groups('managers')

                  & one_line_rset() & is_instance('CWSource')

                  & score_entity(lambda x: x.name != 'system'))

    title = _('synchronize')

    category = 'mainactions'

    order = 20

    def url(self):

        entity = self.cw_rset.get_entity(self.cw_row or 0, self.cw_col or 0)

        return entity.absolute_url(vid=self.__regid__)

class CWSourceSyncView(EntityView):

    __regid__ = 'cw.source-sync'

    __select__ = (match_user_groups('managers')

                  & one_line_rset() & is_instance('CWSource')

                  & score_entity(lambda x: x.name != 'system'))

    title = _('synchronize')

    def entity_call(self, entity):

        import_log_eid = self._cw.call_service('source-sync', source_eid=entity.eid)

        msg = self._cw._('Synchronization has been requested, refresh this page in a few '

                         'minutes.')

        import_log = self._cw.entity_from_eid(import_log_eid)

        url = import_log.absolute_url(__message=msg)

        raise Redirect(url)

# sources management view ######################################################

class ManageSourcesAction(actions.ManagersAction):

    __regid__ = 'cwsource'

    title = _('data sources')

    category = 'manage'

    order = 100

class CWSourcesManagementView(StartupView):

    __regid__ = 'cw.sources-management'

    rql = ('Any S,ST,SP,SD,SN ORDERBY SN WHERE S is CWSource, S name SN, S type ST, '

           'S latest_retrieval SD, S parser SP')

    title = _('data sources management')

    def call(self, **kwargs):

        self.w('<h1>%s</h1>' % self._cw._(self.title))

        self.w(add_etype_button(self._cw, 'CWSource'))

        self.w(u'<div class="clear"></div>')

        self.wview('cw.sources-table', self._cw.execute(self.rql))

class CWSourcesTable(tableview.EntityTableView):

    __regid__ = 'cw.sources-table'

    __select__ = is_instance('CWSource')

    columns = ['source', 'type', 'parser', 'latest_retrieval', 'latest_import']

    class LatestImportColRenderer(tableview.EntityTableColRenderer):

        def render_cell(self, w, rownum):

            entity = self.entity(rownum)

            rset = self._cw.execute('Any X,XS,XST ORDERBY XST DESC LIMIT 1 WHERE '

                                    'X cw_import_of S, S eid %(s)s, X status XS, '

                                    'X start_timestamp XST', {'s': entity.eid})

            if rset:

                self._cw.view('incontext', rset, row=0, w=w)

            else:

                w(self.empty_cell_content)

    column_renderers = {

        'source': tableview.MainEntityColRenderer(),

        'latest_import': LatestImportColRenderer(header=_('latest import'),

                                                 sortable=False)

        }

# datafeed source import #######################################################

REVERSE_SEVERITIES = {

    logging.DEBUG :   _('DEBUG'),

    logging.INFO :    _('INFO'),

    logging.WARNING : _('WARNING'),

    logging.ERROR :   _('ERROR'),

    logging.FATAL :   _('FATAL')

}

def log_to_table(req, rawdata):

    data = []

    for msg_idx, msg in enumerate(rawdata.split('<br/>')):

        record = msg.strip()

        if not record:

            continue

        try:

            severity, url, line, msg = record.split('\t', 3)

        except ValueError:

            req.warning('badly formated log %s' % record)

            url = line = u''

            severity = logging.DEBUG

            msg = record

        data.append( (severity, url, line, msg) )

    return data

class LogTableLayout(tableview.TableLayout):

    __select__ = match_view('cw.log.table')

    needs_js = tableview.TableLayout.needs_js + ('cubicweb.log.js',)

    needs_css = tableview.TableLayout.needs_css + ('cubicweb.log.css',)

    columns_css = {

        0: 'logSeverity',

        1: 'logPath',

        2: 'logLine',

        3: 'logMsg',

        }

    def render_table(self, w, actions, paginate):

        default_level = self.view.cw_extra_kwargs['default_level']

        if default_level != 'Debug':

            self._cw.add_onload('$("select.log_filter").val("%s").change();'

                           % self._cw.form.get('logLevel', default_level))

        w(u'\n<form action="#"><fieldset>')

        w(u'<label>%s</label>' % self._cw._(u'Message threshold'))

        w(u'<select class="log_filter" onchange="filterLog(\'%s\', this.options[this.selectedIndex].value)">'

          % self.view.domid)

        for level in ('DEBUG', 'INFO', 'WARNING', 'ERROR', 'FATAL'):

            w('<option value="%s">%s</option>' % (level.capitalize(),

                                                  self._cw._(level)))

        w(u'</select>')

        w(u'</fieldset></form>')

        super(LogTableLayout, self).render_table(w, actions, paginate)

    def table_attributes(self):

        attrs = super(LogTableLayout, self).table_attributes()

        attrs['id'] = 'table'+self.view.domid

        return attrs

    def row_attributes(self, rownum):

        attrs = super(LogTableLayout, self).row_attributes(rownum)

        attrs['id'] = 'log_msg_%i' % rownum

        severityname = REVERSE_SEVERITIES[int(self.view.pyvalue[rownum][0])]

        attrs['class'] = 'log%s' % severityname.capitalize()

        return attrs

    def cell_attributes(self, rownum, colnum, colid):

        attrs = super(LogTableLayout, self).cell_attributes(rownum, colnum, colid)

        attrs['class'] = self.columns_css[colnum]

        return attrs

class LogTable(pyviews.PyValTableView):

    __regid__ = 'cw.log.table'

    headers = [_('severity'), _('url'), _('line'), _('message')]

    @cachedproperty

    def domid(self):

        return make_uid('logTable')

    class SeverityRenderer(pyviews.PyValTableColRenderer):

        def render_cell(self, w, rownum):

            severity = self.data[rownum][0]

            w(u'<a class="internallink" href="javascript:;" title="%(title)s" '

              u'''onclick="document.location.hash='%(msg_id)s';">&#182;</a>'''

              u' %(severity)s' % {

                'severity': self._cw._(REVERSE_SEVERITIES[int(severity)]),

                'title': self._cw._('permalink to this message'),

                'msg_id': 'log_msg_%i' % rownum,

            })

        def sortvalue(self, rownum):

            return int(self.data[rownum][0])

    class URLRenderer(pyviews.PyValTableColRenderer):

        def render_cell(self, w, rownum):

            url = self.data[rownum][1]

            if url and url.startswith('http'):

                url = tags.a(url, href=url)

            w(url or u' ')

    class LineRenderer(pyviews.PyValTableColRenderer):

        def render_cell(self, w, rownum):

            line = self.data[rownum][2]

            w(line or u' ')

    class MessageRenderer(pyviews.PyValTableColRenderer):

        snip_over = 7

        def render_cell(self, w, rownum):

            msg = self.data[rownum][3]

            lines = msg.splitlines()

            if len(lines) <= self.snip_over:

                w(u'<pre class="rawtext">%s</pre>' % msg)

            else:

                # The make_uid argument has no specific meaning here.

                div_snip_id = make_uid(u'log_snip_')

                div_full_id = make_uid(u'log_full_')

                divs_id = (div_snip_id, div_full_id)

                snip = u'\n'.join((lines[0], lines[1],

                                   u'  ...',

                                   u'    %i more lines [double click to expand]' % (len(lines)-4),

                                   u'  ...',

                                   lines[-2], lines[-1]))

                divs = (

                        (div_snip_id, snip, u'expand', "class='collapsed'"),

                        (div_full_id, msg,  u'collapse', "class='hidden'")

                )

                for div_id, content, button, h_class in divs:

                    text = self._cw._(button)

                    js = u"toggleVisibility('%s'); toggleVisibility('%s');" % divs_id

                    w(u'<div id="%s" %s>' % (div_id, h_class))

                    w(u'<pre class="raw_test" ondblclick="javascript: %s" '

                      u'title="%s" style="display: block;">' % (js, text))

                    w(content)

                    w(u'</pre>')

                    w(u'</div>')

    column_renderers = {0: SeverityRenderer(),

                        1: URLRenderer(sortable=False),

                        2: LineRenderer(sortable=False),

                        3: MessageRenderer(sortable=False),

                        }

class DataFeedSourceDataImport(EntityView):

    __select__ = EntityView.__select__ & match_kwargs('rtype')

    __regid__ = 'cw.formated_log'

    def cell_call(self, row, col, rtype, loglevel='Info', **kwargs):

        if 'dispctrl' in self.cw_extra_kwargs:

            loglevel = self.cw_extra_kwargs['dispctrl'].get('loglevel', loglevel)

        entity = self.cw_rset.get_entity(row, col)

        value = getattr(entity, rtype)

        if value:

            self._cw.view('cw.log.table', pyvalue=log_to_table(self._cw, value),

                          default_level=loglevel, w=self.w)

        else:

            self.w(self._cw._('no log to display'))

_pvs.tag_attribute(('CWDataImport', 'log'), 'relations')

_pvdc.tag_attribute(('CWDataImport', 'log'), {'vid': 'cw.formated_log'})

_pvs.tag_subject_of(('CWDataImport', 'cw_import_of', '*'), 'hidden') # in breadcrumbs

_pvs.tag_object_of(('*', 'cw_import_of', 'CWSource'), 'hidden') # in dedicated tab

class CWDataImportIPrevNextAdapter(navigation.IPrevNextAdapter):

    __select__ = is_instance('CWDataImport')

    def next_entity(self):

        if self.entity.start_timestamp is not None:

            # add NOT X eid %(e)s because > may not be enough