"""management and error screens

:organization: Logilab

:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

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

"""

__docformat__ = "restructuredtext en"

from logilab.mtconverter import html_escape

from logilab.common.decorators import cached

from cubicweb.common.utils import UStringIO

from cubicweb.common.view import AnyRsetView, StartupView, EntityView

from cubicweb.common.selectors import (yes, one_line_rset,

                                       accept_rset, none_rset,

from cubicweb.web import INTERNAL_FIELD_VALUE, eid_param, stdmsgs

from cubicweb.web.widgets import StaticComboBoxWidget

from cubicweb.web.form import FormMixIn

_ = unicode

def begin_form(w, entity, redirectvid, redirectpath=None, msg=None):

    w(u'<form method="post" action="%s">\n' % entity.req.build_url('edit'))

    w(u'<fieldset>\n')

    w(u'<input type="hidden" name="__redirectvid" value="%s"/>\n' % redirectvid)

    w(u'<input type="hidden" name="__redirectpath" value="%s"/>\n' % (

        html_escape(redirectpath or entity.rest_path())))

    w(u'<input type="hidden" name="eid" value="%s"/>\n' % entity.eid)

    w(u'<input type="hidden" name="%s" value="%s"/>\n' % (

        eid_param('__type', entity.eid), entity.e_schema))

    if msg:

        w(u'<input type="hidden" name="__message" value="%s"/>\n'

          % html_escape(msg))

class SecurityViewMixIn(object):

    """display security information for a given schema """

    def schema_definition(self, eschema, link=True,  access_types=None):

        w = self.w

        _ = self.req._

        if not access_types:

            access_types = eschema.ACTIONS

        w(u'<table class="schemaInfo">')

        w(u'<tr><th>%s</th><th>%s</th><th>%s</th></tr>' % ( 

            _("permission"), _('granted to groups'), _('rql expressions')))

        for access_type in access_types:

            w(u'<tr>')

            w(u'<td>%s</td>' % _('%s_perm' % access_type))

            groups = eschema.get_groups(access_type)

            l = []

            groups = [(_(group), group) for group in groups]

            for trad, group in sorted(groups):

                if link:

                    l.append(u'<a href="%s" class="%s">%s</a><br/>' % (

                    self.build_url('egroup/%s' % group), group, trad))

                else:

                    l.append(u'<div class="%s">%s</div>' % (group, trad))

            w(u'<td>%s</td>' % u''.join(l))

            rqlexprs = eschema.get_rqlexprs(access_type)

            w(u'<td>%s</td>' % u'<br/><br/>'.join(expr.expression for expr in rqlexprs))

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

        w(u'</table>')

    def has_schema_modified_permissions(self, eschema, access_types):

        """ return True if eschema's actual permissions are diffrents

        from the default ones

        """

        for access_type in access_types:

            if eschema.get_rqlexprs(access_type):

                return True

            if eschema.get_groups(access_type) != \

                    frozenset(eschema.get_default_groups()[access_type]):

                return True

        return False

class SecurityManagementView(EntityView, SecurityViewMixIn):

    """display security information for a given entity"""

    id = 'security'

    title = _('security')

    def cell_call(self, row, col):

        self.req.add_js('cubicweb.edition.js')

        self.req.add_css('cubicweb.acl.css')

        entity = self.entity(row, col)

        w = self.w

        _ = self.req._

        w(u'<h1><span class="etype">%s</span> <a href="%s">%s</a></h1>'

          % (entity.dc_type().capitalize(),

             html_escape(entity.absolute_url()),

             html_escape(entity.dc_title())))

        # first show permissions defined by the schema

        self.w('<h2>%s</h2>' % _('schema\'s permissions definitions'))

        self.schema_definition(entity.e_schema)

        self.w('<h2>%s</h2>' % _('manage security'))

        # ownership information

        if self.schema.rschema('owned_by').has_perm(self.req, 'add',

                                                    fromeid=entity.eid):

            self.owned_by_edit_form(entity)

        else:

            self.owned_by_information(entity)

        # epermissions

        if 'require_permission' in entity.e_schema.subject_relations():

            w('<h3>%s</h3>' % _('permissions for this entity'))

            reqpermschema = self.schema.rschema('require_permission')

            self.require_permission_information(entity, reqpermschema)

            if reqpermschema.has_perm(self.req, 'add', fromeid=entity.eid):

                self.require_permission_edit_form(entity)

    def owned_by_edit_form(self, entity):

        self.w('<h3>%s</h3>' % self.req._('ownership'))

        begin_form(self.w, entity, 'security', msg= _('ownerships have been changed'))

        self.w(u'<table border="0">\n')

        self.w(u'<tr><td>\n')

        wdg = entity.get_widget('owned_by')

        self.w(wdg.edit_render(entity))

        self.w(u'</td><td>\n')

        self.w(self.button_ok())

        self.w(u'</td></tr>\n</table>\n')

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

    def owned_by_information(self, entity):

        ownersrset = entity.related('owned_by')

        if ownersrset:

            self.w('<h3>%s</h3>' % self.req._('ownership'))

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

            self.w(self.req._('this entity is currently owned by') + ' ')

            self.wview('csv', entity.related('owned_by'), 'null')

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

        # else we don't know if this is because entity has no owner or becayse

        # user as no access to owner users entities

    def require_permission_information(self, entity, reqpermschema):

        if entity.require_permission:

            w = self.w

            _ = self.req._

            if reqpermschema.has_perm(self.req, 'delete', fromeid=entity.eid):

                delurl = self.build_url('edit', __redirectvid='security',

                                        __redirectpath=entity.rest_path())

                delurl = delurl.replace('%', '%%')

                # don't give __delete value to build_url else it will be urlquoted

                # and this will replace %s by %25s

                delurl += '&__delete=%s:require_permission:%%s' % entity.eid

                dellinktempl = u'[<a href="%s" title="%s">-</a>]&nbsp;' % (

                    html_escape(delurl), _('delete this permission'))

            else:

                dellinktempl = None

            w(u'<table class="schemaInfo">')

            w(u'<tr><th>%s</th><th>%s</th></tr>' % (_("permission"),

                                                    _('granted to groups')))

            for eperm in entity.require_permission:

                w(u'<tr>')

                if dellinktempl:

                    w(u'<td>%s%s</td>' % (dellinktempl % eperm.eid,

                                          eperm.view('oneline')))

                else:

                    w(u'<td>%s</td>' % eperm.view('oneline'))

                w(u'<td>%s</td>' % self.view('csv', eperm.related('require_group'), 'null'))

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

            w(u'</table>')

        else:

            self.w(self.req._('no associated epermissions'))

    def require_permission_edit_form(self, entity):

        w = self.w

        _ = self.req._

        newperm = self.vreg.etype_class('EPermission')(self.req, None)

        newperm.eid = self.req.varmaker.next()

        w(u'<p>%s</p>' % _('add a new permission'))

        begin_form(w, newperm, 'security', entity.rest_path())

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

          % eid_param('edito-require_permission', newperm.eid))

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

          % (eid_param('require_permission', newperm.eid), entity.eid))

        w(u'<table border="0">\n')

        w(u'<tr><th>%s</th><th>%s</th><th>%s</th><th>&nbsp;</th></tr>\n'

               % (_("name"), _("label"), _('granted to groups')))

        if getattr(entity, '__permissions__', None):

            # vocabfunc must be compliant with StaticVocabularyConstraint.vocabulary

            # which takes only keyword parameters

            wdg = StaticComboBoxWidget(self.vreg, self.schema['EPermission'],

                                       self.schema['name'], self.schema['String'],

                                       vocabfunc=lambda entity, x=entity: x.__permissions__)

        else:

            wdg = newperm.get_widget('name')

        w(u'<tr><td>%s</td>\n' % wdg.edit_render(newperm))

        wdg = newperm.get_widget('label')

        w(u'<td>%s</td>\n' % wdg.edit_render(newperm))

        wdg = newperm.get_widget('require_group')

        w(u'<td>%s</td>\n' % wdg.edit_render(newperm))

        w(u'<td>%s</td></tr>\n' % self.button_ok())

        w(u'</table>')

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

    def button_ok(self):

        return (u'<input class="validateButton" type="submit" name="submit" value="%s"/>'

                % self.req._(stdmsgs.BUTTON_OK))

class ErrorView(AnyRsetView):

    """default view when no result has been found"""

    __selectors__ = (yes,)

    id = 'error'

    def page_title(self):

        """returns a title according to the result set - used for the

        title in the HTML header

        """

        return self.req._('an error occured')

    def call(self):

        req = self.req.reset_headers()

        _ = req._; w = self.w

        ex = req.data.get('ex')#_("unable to find exception information"))

        excinfo = req.data.get('excinfo')

        title = _('an error occured')

        w(u'<h2>%s</h2>' % title)

        if 'errmsg' in req.data:

            ex = req.data['errmsg']

            exclass = None

        else:

            exclass = ex.__class__.__name__

            ex = exc_message(ex, req.encoding)

        if excinfo is not None and self.config['print-traceback']:

            if exclass is None:

                w(u'<div class="tb">%s</div>'

                       % html_escape(ex).replace("\n","<br />"))

            else:

                w(u'<div class="tb">%s: %s</div>'

                       % (exclass, html_escape(ex).replace("\n","<br />")))

            w(u'<hr />')

            w(u'<div class="tb">%s</div>' % html_traceback(excinfo, ex, ''))

        else:

            w(u'<div class="tb">%s</div>' % (html_escape(ex).replace("\n","<br />")))

        # if excinfo is not None, it's probably not a bug

        if excinfo is None:

            return

        vcconf = self.config.vc_config()

        w(u"<div>")

        eversion = vcconf.get('cubicweb', _('no version information'))

        # NOTE: tuple wrapping needed since eversion is itself a tuple

        w(u"<b>CubicWeb version:</b> %s<br/>\n" % (eversion,))

        for pkg in self.config.cubes():

            pkgversion = vcconf.get(pkg, _('no version information'))

            w(u"<b>Package %s version:</b> %s<br/>\n" % (pkg, pkgversion))

        w(u"</div>")

        # creates a bug submission link if SUBMIT_URL is set

        submiturl = self.config['submit-url']

        if submiturl:

            binfo = text_error_description(ex, excinfo, req, eversion,

                                           [(pkg, vcconf.get(pkg, _('no version information')))

                                            for pkg in self.config.cubes()])

            w(u'<form action="%s" method="post">\n' % html_escape(submiturl))

            w(u'<fieldset>\n')

            w(u'<textarea class="hidden" name="description">%s</textarea>' % html_escape(binfo))

            w(u'<input type="hidden" name="description_format" value="text/rest"/>')

            w(u'<input type="hidden" name="__bugreporting" value="1"/>')

            w(u'<input type="submit" value="%s"/>' % _('Submit bug report'))

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

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

        submitmail = self.config['submit-mail']

        if submitmail:

            binfo = text_error_description(ex, excinfo, req, eversion,

                                           [(pkg, vcconf.get(pkg, _('no version information')))

                                            for pkg in self.config.cubes()])

            w(u'<form action="%s" method="post">\n' % req.build_url('reportbug'))

            w(u'<fieldset>\n')

            w(u'<input type="hidden" name="description" value="%s"/>' % html_escape(binfo))

            w(u'<input type="hidden" name="__bugreporting" value="1"/>')

            w(u'<input type="submit" value="%s"/>' % _('Submit bug report by mail'))

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

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

def exc_message(ex, encoding):

    try:

        return unicode(ex)

    except:

        try:

            return unicode(str(ex), encoding, 'replace')

        except:

            return unicode(repr(ex), encoding, 'replace')

def text_error_description(ex, excinfo, req, eversion, cubes):

    binfo = rest_traceback(excinfo, html_escape(ex))

    binfo += u'\n\n:URL: %s\n' % req.url()

    if not '__bugreporting' in req.form:

        binfo += u'\n:form params:\n'

        binfo += u'\n'.join(u'  * %s = %s' % (k, v) for k, v in req.form.iteritems())

    binfo += u'\n\n:CubicWeb version: %s\n'  % (eversion,)

    for pkg, pkgversion in cubes:

        binfo += u":Package %s version: %s\n" % (pkg, pkgversion)

    binfo += '\n'

    return binfo

# some string we want to be internationalizable for nicer display of eproperty

# groups

_('navigation')

_('ui')

_('actions')

_('boxes')

_('components')

_('contentnavigation')

    """builds a HTML link that switches the visibility & remembers it"""

    return u'<a href="%s">%s</a>' % (action, label)

def css_class(someclass):

    return someclass and 'class="%s"' % someclass or ''

class SystemEpropertiesForm(FormMixIn, StartupView):

    controller = 'edit'

    id = 'systemepropertiesform'

    title = _('site configuration')

    require_groups = ('managers',)

    category = 'startupview'

    def linkable(self):

        return True

    def url(self):

        """return the url associated with this view. We can omit rql here"""

        return self.build_url('view', vid=self.id)

    def _cookie_name(self, somestr):

        return str('%s_property_%s' % (self.config.appid, somestr))

    def _group_status(self, group, default=u'hidden'):

        cookies = self.req.get_cookie()

        cookiename = self._cookie_name(group)

        cookie = cookies.get(cookiename)

        if cookie is None:

            cookies[cookiename] = default

            self.req.set_cookie(cookies, cookiename, maxage=None)

            status = default