# copyright 2010-2012 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, CWSourceSchemaConfig).

"""

__docformat__ = "restructuredtext en"

_ = unicode

import logging

from itertools import repeat

from logilab.mtconverter import xml_escape

from logilab.common.decorators import cachedproperty

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)

from cubicweb.view import EntityView, StartupView

from cubicweb.schema import META_RTYPES, VIRTUAL_RTYPES, display_name

from cubicweb.web import formwidgets as wdgs, facet

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(('CWSourceSchemaConfig', 'cw_schema', '*'), False)

_abaa.tag_object_of(('CWSourceSchemaConfig', 'cw_for_source', '*'), False)

_abaa.tag_object_of(('CWSourceSchemaConfig', 'cw_host_config_of', '*'), False)

_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')

_afs.tag_object_of(('*', 'cw_for_source', 'CWSource'), '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_for_source', 'CWSource'), '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'})

_rc.tag_attribute(('CWSourceSchemaConfig', 'options'), {'rvid': 'verbatimattr'})

class CWSourcePrimaryView(tabs.TabbedPrimaryView):

    __select__ = is_instance('CWSource')

    tabs = [_('cwsource-main'), _('cwsource-mapping'), _('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=range(2),

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

class CWSourceMappingTab(EntityView):

    __regid__ = 'cwsource-mapping'

    __select__ = (is_instance('CWSource')

                  & match_user_groups('managers')

                  & score_entity(lambda x:x.type in MAPPED_SOURCE_TYPES))

    def entity_call(self, entity):

        _ = self._cw._

        self.w('<h3>%s</h3>' % _('Entity and relation supported by this source'))

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

                                __linkto='cw_for_source:%s:subject' % entity.eid))

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

        rset = self._cw.execute(

            'Any X, SCH, XO ORDERBY ET WHERE X options XO, X cw_for_source S, S eid %(s)s, '

            'X cw_schema SCH, SCH is ET', {'s': entity.eid})

        self.wview('table', rset, 'noresult')

        # self.w('<h3>%s</h3>' % _('Relations that should not be crossed'))

        # self.w('<p>%s</p>' % _(

        #     'By default, when a relation is not supported by a source, it is '

        #     'supposed that a local relation may point to an entity from the '

        #     'external source. Relations listed here won\'t have this '

        #     '"crossing" behaviour.'))

        # self.wview('list', entity.related('cw_dont_cross'), 'noresult')

        # self.w('<h3>%s</h3>' % _('Relations that can be crossed'))

        # self.w('<p>%s</p>' % _(

        #     'By default, when a relation is supported by a source, it is '

        #     'supposed that a local relation can\'t point to an entity from the '

        #     'external source. Relations listed here may have this '

        #     '"crossing" behaviour anyway.'))

        # self.wview('list', entity.related('cw_may_cross'), 'noresult')

        checker = MAPPING_CHECKERS.get(entity.type, MappingChecker)(entity)

        checker.check()

        if (checker.errors or checker.warnings or checker.infos):

            self.w('<h2>%s</h2>' % _('Detected problems'))

            errors = zip(repeat(_('error')), checker.errors)

            warnings = zip(repeat(_('warning')), checker.warnings)

            infos = zip(repeat(_('warning')), checker.infos)

            self.wview('pyvaltable', pyvalue=errors + warnings + infos)

class MappingChecker(object):

    def __init__(self, cwsource):

        self.cwsource = cwsource

        self.errors = []

        self.warnings = []

        self.infos = []

        self.schema = cwsource._cw.vreg.schema

    def init(self):

        # supported entity types

        self.sentities = set()

        # supported relations

        self.srelations = {}

        # avoid duplicated messages

        self.seen = set()

        # first get mapping as dict/sets

        for schemacfg in self.cwsource.reverse_cw_for_source:

            self.init_schemacfg(schemacfg)

    def init_schemacfg(self, schemacfg):

        cwerschema = schemacfg.schema

        if cwerschema.__regid__ == 'CWEType':

            self.sentities.add(cwerschema.name)

        elif cwerschema.__regid__ == 'CWRType':

            assert not cwerschema.name in self.srelations

            self.srelations[cwerschema.name] = None

        else: # CWAttribute/CWRelation

            self.srelations.setdefault(cwerschema.rtype.name, []).append(

                (cwerschema.stype.name, cwerschema.otype.name) )

            self.sentities.add(cwerschema.stype.name)

            self.sentities.add(cwerschema.otype.name)

    def check(self):

        self.init()

        error = self.errors.append

        warning = self.warnings.append

        info = self.infos.append

        for etype in self.sentities:

            eschema = self.schema[etype]

            for rschema, ttypes, role in eschema.relation_definitions():

                if rschema in META_RTYPES:

                    continue

                ttypes = [ttype for ttype in ttypes if ttype in self.sentities]

                if not rschema in self.srelations:

                    for ttype in ttypes:

                        rdef = rschema.role_rdef(etype, ttype, role)

                        self.seen.add(rdef)

                        if rdef.role_cardinality(role) in '1+':

                            error(_('relation %(type)s with %(etype)s as %(role)s '

                                    'and target type %(target)s is mandatory but '

                                    'not supported') %

                                  {'rtype': rschema, 'etype': etype, 'role': role,

                                   'target': ttype})

                        elif ttype in self.sentities:

                            warning(_('%s could be supported') % rdef)

                elif not ttypes:

                    warning(_('relation %(rtype)s with %(etype)s as %(role)s is '

                              'supported but no target type supported') %

                            {'rtype': rschema, 'role': role, 'etype': etype})

        for rtype, rdefs in self.srelations.iteritems():

            if rdefs is None:

                rschema = self.schema[rtype]

                for subj, obj in rschema.rdefs:

                    if subj in self.sentities and obj in self.sentities:

                        break

                else:

                    error(_('relation %s is supported but none of its definitions '

                            'matches supported entities') % rtype)

        self.custom_check()

    def custom_check(self):

        pass

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'}

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

class ManageSourcesAction(actions.ManagersAction):

    __regid__ = 'cwsource'

    title = _('data sources')

    category = 'manage'

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.logFilter").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')