"""html widgets

those are in cubicweb since we need to know available widgets at schema

serialization time

"""

from math import floor

import random

from logilab.mtconverter import xml_escape

from cubicweb.utils import UStringIO

from cubicweb.uilib import toggle_action, htmlescape

from cubicweb.web import jsonize

# XXX HTMLWidgets should have access to req (for datadir / static urls,

#     i18n strings, etc.)

class HTMLWidget(object):

    def _initialize_stream(self, w=None):

        if w:

            self.w = w

        else:

            self._stream = UStringIO()

            self.w = self._stream.write

    def _render(self):

        raise NotImplementedError

    def render(self, w=None):

        self._initialize_stream(w)

        self._render()

        if w is None:

            return self._stream.getvalue()

    def is_empty(self):

        return False

class BoxWidget(HTMLWidget):

    def __init__(self, title, id, items=None, _class="boxFrame",

                 islist=True, shadow=True, escape=True):

        self.title = title

        self.id = id

        self.items = items or []

        self._class = _class

        self.islist = islist

        self.shadow = shadow

        self.escape = escape

    def __len__(self):

        return len(self.items)

    def is_empty(self):

        return len(self) == 0

    def append(self, item):

        self.items.append(item)

    def extend(self, items):

        self.items.extend(items)

    title_class = 'boxTitle'

    main_div_class = 'boxContent'

    listing_class = 'boxListing'

    def box_begin_content(self):

        self.w(u'<div class="%s">\n' % self.main_div_class)

        if self.islist:

            self.w(u'<ul class="%s">' % self.listing_class)

    def box_end_content(self):

        if self.islist:

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

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

        if self.shadow:

            self.w(u'<div class="shadow">&#160;</div>')

    def _render(self):

        if self.id:

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

        else:

            self.w(u'<div class="%s">' % self._class)

        if self.title:

            if self.escape:

                title = '<span>%s</span>' % xml_escape(self.title)

            else:

                title = '<span>%s</span>' % self.title

            self.w(u'<div class="%s">%s</div>' % (self.title_class, title))

        if self.items:

            self.box_begin_content()

            for item in self.items:

                item.render(self.w)

            self.box_end_content()

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

class SideBoxWidget(BoxWidget):

    """default CubicWeb's sidebox widget"""

    title_class = u'sideBoxTitle'

    main_div_class = u'sideBoxBody'

    listing_class = ''

    def __init__(self, title, id=None):

        super(SideBoxWidget, self).__init__(title, id=id, _class='sideBox',

                                            shadow=False)

class MenuWidget(BoxWidget):

    main_div_class = 'menuContent'

    listing_class = 'menuListing'

    def box_end_content(self):

        if self.islist:

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

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

class RawBoxItem(HTMLWidget):

    """a simpe box item displaying raw data"""

    def __init__(self, label, liclass=None):

        self.label = label

        self.liclass = liclass

    def _start_li(self):

        if self.liclass is None:

            return u'<li>'

        else:

            return u'<li class="%s">' % self.liclass

        return self.label

    def _render(self):

        self.w(u'%s%s</li>' % (self._start_li(), self.label))

class BoxMenu(RawBoxItem):

    """a menu in a box"""

    link_class = 'boxMenu'

    def __init__(self, label, items=None, isitem=True, liclass=None, ident=None,

                 link_class=None):

        super(BoxMenu, self).__init__(label, liclass)

        self.items = items or []

        self.isitem = isitem

        self.ident = ident or u'boxmenu_%s' % label.replace(' ', '_').replace("'", '')

        if link_class:

            self.link_class = link_class

    def append(self, item):

        self.items.append(item)

    def _begin_menu(self, ident):

        self.w(u'<ul id="%s" class="hidden">' % ident)

    def _end_menu(self):

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

    def _render(self):

        if self.isitem:

            self.w(self._start_li())

        ident = self.ident

        self.w(u'<a href="%s" class="%s">%s</a>' % (

            toggle_action(ident), self.link_class, self.label))

        self._begin_menu(ident)

        for item in self.items:

            item.render(self.w)

        self._end_menu()

        if self.isitem:

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

class PopupBoxMenu(BoxMenu):

    """like BoxMenu but uses div and specific css class

    in order to behave like a popup menu

    """

    link_class = 'popupMenu'

    def _begin_menu(self, ident):

        self.w(u'<div class="popupWrapper"><div id="%s" class="hidden popup"><ul>' % ident)

    def _end_menu(self):

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

class BoxField(HTMLWidget):

    """couples label / value meant to be displayed in a box"""

    def __init__(self, label, value):

        self.label = label

        self.value = value

    def _render(self):

        self.w(u'<li><div><span class="label">%s</span>&#160;'

               u'<span class="value">%s</span></div></li>'

               % (self.label, self.value))

class BoxSeparator(HTMLWidget):

    """a menu separator"""

    def _render(self):

        self.w(u'</ul><hr class="boxSeparator"/><ul>')

class BoxLink(HTMLWidget):

    """a link in a box"""

    def __init__(self, href, label, _class='', title='', ident='', escape=False):

        self.href = href

        if escape:

            self.label = xml_escape(label)

        else:

            self.label = label

        self._class = _class or ''

        self.title = title

        self.ident = ident

    def _render(self):

        link = u'<a href="%s" title="%s">%s</a>' % (

            xml_escape(self.href), xml_escape(self.title), self.label)

        if self.ident:

            self.w(u'<li id="%s" class="%s">%s</li>\n' % (self.ident, self._class, link))

        else:

            self.w(u'<li class="%s">%s</li>\n' % (self._class, link))

class BoxHtml(HTMLWidget):

    """a form in a box"""

    def __init__(self, rawhtml):

        self.rawhtml = rawhtml

    def _render(self):

        self.w(self.rawhtml)

class TableColumn(object):

    def __init__(self, name, rset_sortcol):

        """

        :param name: the column's name

        :param rset_sortcol: the model's column used to sort this column view

        """

        self.name = name

        self.cellrenderers = []

        self.rset_sortcol = rset_sortcol

        self.cell_attrs = {}

    def append_renderer(self, cellvid, colindex):

        # XXX (adim) : why do we need colindex here ?

        self.cellrenderers.append( (cellvid, colindex) )

    def add_attr(self, attr, value):

        self.cell_attrs[attr] = value

class SimpleTableModel(object):

    """

    uses a list of lists as a storage backend

    NB: the model expectes the cellvid passed to

    TableColumn.append_renderer to be a callable accepting a single

    argument and returning a unicode object

    """

    def __init__(self, rows):

        self._rows = rows

    def get_rows(self):

        return self._rows

    def render_cell(self, cellvid, rowindex, colindex, w):

        value = self._rows[rowindex][colindex]

        w(cellvid(value))

    @htmlescape

    @jsonize

    def sortvalue(self, rowindex, colindex):

        value =  self._rows[rowindex][colindex]

        if value is None:

            return u''

        elif isinstance(value, int):

            return u'%09d' % value

        else:

            return unicode(value)

class TableWidget(HTMLWidget):

    """

    Display data in a Table with sortable column.

    When using remember to include the required css and js with:

    self._cw.add_js('jquery.tablesorter.js')

    self._cw.add_css(('cubicweb.tablesorter.css', 'cubicweb.tableview.css'))

    """

    highlight = "onmouseover=\"addElementClass(this, 'highlighted');\" " \

                "onmouseout=\"removeElementClass(this, 'highlighted');\""

    def __init__(self, model):

        self.model = model

        self.columns = []

    def append_column(self, column):

        """

        :type column: TableColumn

        """

        self.columns.append(column)

    def _render(self):

        self.w(u'<table class="listing">')

        self.w(u'<thead>')

        self.w(u'<tr class="header">')

        for column in self.columns:

            attrs = ('%s="%s"' % (name, value) for name, value in column.cell_attrs.iteritems())

            self.w(u'<th %s>%s</th>' % (' '.join(attrs), column.name))

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

        self.w(u'</thead><tbody>')

        for rowindex in xrange(len(self.model.get_rows())):

            klass = (rowindex%2==1) and 'odd' or 'even'

            self.w(u'<tr class="%s" %s>' % (klass, self.highlight))

            for column, sortvalue in self.itercols(rowindex):

                attrs = dict(column.cell_attrs)

                attrs["cubicweb:sortvalue"] = 'json:' + sortvalue

                attrs = ('%s="%s"' % (name, value) for name, value in attrs.iteritems())

                self.w(u'<td %s>' % (' '.join(attrs)))

                for cellvid, colindex in column.cellrenderers:

                    self.model.render_cell(cellvid, rowindex, colindex, w=self.w)

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

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

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

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

    def itercols(self, rowindex):

        for column in self.columns:

            yield column, self.model.sortvalue(rowindex, column.rset_sortcol)