# copyright 2003-2012 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/>.

"""Bases HTML components:

* the rql input form

* the logged user link

"""

from __future__ import with_statement

__docformat__ = "restructuredtext en"

_ = unicode

from logilab.mtconverter import xml_escape

from logilab.common.registry import yes

from logilab.common.deprecation import class_renamed

from rql import parse

from cubicweb.predicates import (match_form_params, match_context,

                                 multi_etypes_rset, configuration_values,

                                 anonymous_user, authenticated_user)

from cubicweb.schema import display_name

from cubicweb.utils import wrap_on_write

from cubicweb.uilib import toggle_action

from cubicweb.web import component, uicfg

from cubicweb.web.htmlwidgets import MenuWidget, PopupBoxMenu

VISIBLE_PROP_DEF = {

    _('visible'):  dict(type='Boolean', default=True,

                        help=_('display the component or not')),

    }

class RQLInputForm(component.Component):

    """build the rql input form, usually displayed in the header"""

    __regid__ = 'rqlinput'

    cw_property_defs = VISIBLE_PROP_DEF

    visible = False

    def call(self, view=None):

        req = self._cw

        if hasattr(view, 'filter_box_context_info'):

            rset = view.filter_box_context_info()[0]

        else:

            rset = self.cw_rset

        # display multilines query as one line

        rql = rset is not None and rset.printable_rql(encoded=False) or req.form.get('rql', '')

        rql = rql.replace(u"\n", u" ")

        self.w(u'''<div id="rqlinput" class="%s"><form action="%s"><fieldset>

<input type="text" id="rql" name="rql" value="%s"  title="%s" tabindex="%s" accesskey="q" class="searchField" />

''' % (not self.cw_propval('visible') and 'hidden' or '',

       req.build_url('view'), xml_escape(rql), req._('full text or RQL query'), req.next_tabindex()))

        if req.search_state[0] != 'normal':

            self.w(u'<input type="hidden" name="__mode" value="%s"/>'

                   % ':'.join(req.search_state[1]))

        self.w(u'</fieldset></form></div>')

class HeaderComponent(component.CtxComponent): # XXX rename properly along with related context

    """if the user is the anonymous user, build a link to login else display a menu

    with user'action (preference, logout, etc...)

    """

    __abstract__ = True

    cw_property_defs = component.override_ctx(

        component.CtxComponent,

        vocabulary=['header-center', 'header-left', 'header-right', ])

    # don't want user to hide this component using an cwproperty

    site_wide = True

    context = _('header-center')

class ApplLogo(HeaderComponent):

    """build the instance logo, usually displayed in the header"""

    __regid__ = 'logo'

    __select__ = yes() # no need for a cnx

    order = -1

    context = _('header-left')

    def render(self, w):

        w(u'<a href="%s"><img id="logo" src="%s" alt="logo"/></a>'

          % (self._cw.base_url(), self._cw.uiprops['LOGO']))

class ApplicationName(HeaderComponent):

    """display the instance name"""

    __regid__ = 'appliname'

    # XXX support kwargs for compat with other components which gets the view as

    # argument

    def render(self, w, **kwargs):

        title = self._cw.property_value('ui.site-title')

        if title:

            w(u'<span id="appliName"><a href="%s">%s</a></span>' % (

                self._cw.base_url(), xml_escape(title)))

class CookieLoginComponent(HeaderComponent):

    __regid__ = 'anonuserlink'

    __select__ = (HeaderComponent.__select__ & anonymous_user()

                  & configuration_values('auth-mode', 'cookie'))

    context = 'header-right'

    loginboxid = 'popupLoginBox'

    _html = u"""[<a class="logout" title="%s" href="javascript:

cw.htmlhelpers.popupLoginBox('%s', '__login');">%s</a>]"""

    def render(self, w):

        # XXX bw compat, though should warn about subclasses redefining call

        self.w = w

        self.call()

    def call(self):

        self.w(self._html % (self._cw._('login / password'),

                             self.loginboxid, self._cw._('i18n_login_popup')))

        self._cw.view('logform', rset=self.cw_rset, id=self.loginboxid,

                      klass='%s hidden' % self.loginboxid, title=False,

                      showmessage=False, w=self.w)

class HTTPLoginComponent(CookieLoginComponent):

    __select__ = (HeaderComponent.__select__ & anonymous_user()

                  & configuration_values('auth-mode', 'http'))

    def render(self, w):

        # this redirects to the 'login' controller which in turn

        # will raise a 401/Unauthorized

        req = self._cw

        w(u'[<a class="logout" title="%s" href="%s">%s</a>]'

          % (req._('login / password'), req.build_url('login'), req._('login')))

_UserLink = class_renamed('_UserLink', HeaderComponent)

AnonUserLink = class_renamed('AnonUserLink', CookieLoginComponent)

AnonUserLink.__abstract__ = True

AnonUserLink.__select__ &= yes(1)

class AnonUserStatusLink(HeaderComponent):

    __regid__ = 'userstatus'

    __select__ = anonymous_user()

    context = _('header-right')

    order = HeaderComponent.order - 10

    def render(self, w):

        w(u'<span class="caption">%s</span>' % self._cw._('anonymous'))

class AuthenticatedUserStatus(AnonUserStatusLink):

    __select__ = authenticated_user()

    def render(self, w):

        # display useractions and siteactions

        actions = self._cw.vreg['actions'].possible_actions(self._cw, rset=self.cw_rset)

        box = MenuWidget('', 'userActionsBox', _class='', islist=False)

        menu = PopupBoxMenu(self._cw.user.login, isitem=False)

        box.append(menu)

        for action in actions.get('useractions', ()):

            menu.append(self.action_link(action))

        if actions.get('useractions') and actions.get('siteactions'):

            menu.append(self.separator())

        for action in actions.get('siteactions', ()):

            menu.append(self.action_link(action))

        box.render(w=w)

class ApplicationMessage(component.Component):

    """display messages given using the __message parameter into a special div

    section

    """

    __select__ = yes()

    __regid__ = 'applmessages'

    # don't want user to hide this component using an cwproperty

    cw_property_defs = {}

    def call(self, msg=None):

        if msg is None:

            msgs = []

            if self._cw.cnx:

                srcmsg = self._cw.get_shared_data('sources_error', pop=True, txdata=True)

                if srcmsg:

                    msgs.append(srcmsg)

            reqmsg = self._cw.message # XXX don't call self._cw.message twice

            if reqmsg:

                msgs.append(reqmsg)

        else:

            msgs = [msg]

        self.w(u'<div id="appMsg" onclick="%s" class="%s">\n' %

               (toggle_action('appMsg'), (msgs and ' ' or 'hidden')))

        for msg in msgs:

            self.w(u'<div class="message" id="%s">%s</div>' % (self.domid, msg))

        self.w(u'</div>')

class EtypeRestrictionComponent(component.Component):

    """displays the list of entity types contained in the resultset

    to be able to filter accordingly.

    """

    __regid__ = 'etypenavigation'

    __select__ = multi_etypes_rset() | match_form_params(

        '__restrtype', '__restrtypes', '__restrrql')

    cw_property_defs = VISIBLE_PROP_DEF

    # don't want user to hide this component using an cwproperty

    site_wide = True

    visible = False # disabled by default

    def call(self):

        _ = self._cw._

        self.w(u'<div id="etyperestriction">')

        restrtype = self._cw.form.get('__restrtype')

        restrtypes = self._cw.form.get('__restrtypes', '').split(',')

        restrrql = self._cw.form.get('__restrrql')

        if not restrrql:

            rqlst = self.cw_rset.syntax_tree()

            restrrql = rqlst.as_string(self._cw.encoding, self.cw_rset.args)

            restrtypes = self.cw_rset.column_types(0)

        else:

            rqlst = parse(restrrql)

        html = []

        on_etype = False

        etypes = sorted((display_name(self._cw, etype).capitalize(), etype)

                        for etype in restrtypes)

        for elabel, etype in etypes:

            if etype == restrtype:

                html.append(u'<span class="selected">%s</span>' % elabel)

                on_etype = True

            else:

                rqlst.save_state()

                for select in rqlst.children:

                    select.add_type_restriction(select.selection[0].variable, etype)

                newrql = rqlst.as_string(self._cw.encoding, self.cw_rset.args)

                url = self._cw.build_url(rql=newrql, __restrrql=restrrql,

                                         __restrtype=etype, __restrtypes=','.join(restrtypes))

                html.append(u'<span><a href="%s">%s</a></span>' % (

                        xml_escape(url), elabel))

                rqlst.recover()

        if on_etype:

            url = self._cw.build_url(rql=restrrql)

            html.insert(0, u'<span><a href="%s">%s</a></span>' % (

                    url, _('Any')))

        else:

            html.insert(0, u'<span class="selected">%s</span>' % _('Any'))

        self.w(u' | '.join(html))

        self.w(u'</div>')

# contextual components ########################################################

class MetaDataComponent(component.EntityCtxComponent):

    __regid__ = 'metadata'

    context = 'navbottom'

    order = 1

    def render_body(self, w):

        self.entity.view('metadata', w=w)

class SectionLayout(component.Layout):

    __select__ = match_context('navtop', 'navbottom',

                               'navcontenttop', 'navcontentbottom')

    cssclass = 'section'

    def render(self, w):

        if self.init_rendering():

            view = self.cw_extra_kwargs['view']

            w(u'<div class="%s %s" id="%s">' % (self.cssclass, view.cssclass,

                                                view.domid))

            with wrap_on_write(w, '<h4>') as wow:

                view.render_title(wow)

            view.render_body(w)

            w(u'</div>\n')