"""Specific views for entities implementing IProgress

:organization: Logilab

:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.

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

:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses

"""

__docformat__ = "restructuredtext en"

_ = unicode

from logilab.mtconverter import xml_escape

from cubicweb.selectors import implements

from cubicweb.interfaces import IProgress, IMileStone

from cubicweb.schema import display_name

from cubicweb.view import EntityView

from cubicweb.web.htmlwidgets import ProgressBarWidget

class ProgressTableView(EntityView):

    """The progress table view is able to display progress information

    of any object implement IMileStone.

    The default layout is composoed of 7 columns : parent task,

    milestone, state, estimated date, cost, progressbar, and todo_by

    The view accepts an optional ``columns`` paramater that lets you

    remove or reorder some of those columns.

    To add new columns, you should extend this class, define a new

    ``columns`` class attribute and implement corresponding

    build_COLNAME_cell methods

    header_for_COLNAME methods allow to customize header's label

    """

    __regid__ = 'progress_table_view'

    title = _('task progression')

    __select__ = implements(IMileStone)

    # default columns of the table

    columns = (_('project'), _('milestone'), _('state'), _('eta_date'),

               _('cost'), _('progress'), _('todo_by'))

    def call(self, columns=None):

        """displays all versions in a table"""

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

        _ = self.req._

        self.columns = columns or self.columns

        ecls = self.vreg['etypes'].etype_class(self.rset.description[0][0])

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

        self.table_header(ecls)

        self.w(u'<tbody>')

        for row in xrange(self.rset.rowcount):

            self.cell_call(row=row, col=0)

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

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

    def cell_call(self, row, col):

        _ = self.req._

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

        infos = {}

        for col in self.columns:

            meth = getattr(self, 'build_%s_cell' % col, None)

            # find the build method or try to find matching attribute

            if meth:

                content = meth(entity)

            else:

                content = entity.printable_value(col)

            infos[col] = content

        if hasattr(entity, 'progress_class'):

            cssclass = entity.progress_class()

        else:

            cssclass = u''

        self.w(u"""<tr class="%s" onmouseover="addElementClass(this, 'highlighted');"

            onmouseout="removeElementClass(this, 'highlighted')">""" % cssclass)

        line = u''.join(u'<td>%%(%s)s</td>' % col for col in self.columns)

        self.w(line % infos)

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

    ## header management ######################################################

    def header_for_project(self, ecls):

        """use entity's parent type as label"""

        return display_name(self.req, ecls.parent_type)

    def header_for_milestone(self, ecls):

        """use entity's type as label"""

        return display_name(self.req, ecls.id)

    def table_header(self, ecls):

        """builds the table's header"""

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

        _ = self.req._

        for column in self.columns:

            meth = getattr(self, 'header_for_%s' % column, None)

            if meth:

                colname = meth(ecls)

            else:

                colname = _(column)

            self.w(u'<th>%s</th>' % xml_escape(colname))

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

    ## cell management ########################################################

    def build_project_cell(self, entity):

        """``project`` column cell renderer"""

        project = entity.get_main_task()

        if project:

            return project.view('incontext')

        return self.req._('no related project')

    def build_milestone_cell(self, entity):

        """``milestone`` column cell renderer"""

        return entity.view('incontext')

    def build_state_cell(self, entity):

        """``state`` column cell renderer"""

        return xml_escape(self.req._(entity.state))

    def build_eta_date_cell(self, entity):

        """``eta_date`` column cell renderer"""

        if entity.finished():

            return self.format_date(entity.completion_date())

        formated_date = self.format_date(entity.initial_prevision_date())

        if entity.in_progress():

            eta_date = self.format_date(entity.eta_date())

            _ = self.req._

            if formated_date:

                formated_date += u' (%s %s)' % (_('expected:'), eta_date)

            else:

                formated_date = u'%s %s' % (_('expected:'), eta_date)

        return formated_date

    def build_todo_by_cell(self, entity):

        """``todo_by`` column cell renderer"""

        return u', '.join(p.view('outofcontext') for p in entity.contractors())

    def build_cost_cell(self, entity):

        """``cost`` column cell renderer"""

        _ = self.req._

        pinfo = entity.progress_info()

        totalcost = pinfo.get('estimatedcorrected', pinfo['estimated'])

        missing = pinfo.get('notestimatedcorrected', pinfo.get('notestimated', 0))

        costdescr = []

        if missing:

            # XXX: link to unestimated entities

            costdescr.append(_('%s not estimated') % missing)

        estimated = pinfo['estimated']

        if estimated and estimated != totalcost:

            costdescr.append(_('initial estimation %s') % estimated)

        if costdescr:

            return u'%s (%s)' % (totalcost, ', '.join(costdescr))

        return unicode(totalcost)

    def build_progress_cell(self, entity):

        """``progress`` column cell renderer"""

        progress =  u'<div class="progress_data">%s (%.2f%%)</div>' % (

            entity.done, entity.progress())

        return progress + entity.view('progressbar')

class InContextProgressTableView(ProgressTableView):

    """this views redirects to ``progress_table_view`` but removes

    the ``project`` column

    """

    __regid__ = 'ic_progress_table_view'

    def call(self, columns=None):

        view = self.vreg['views'].select('progress_table_view', self.req,

                                         rset=self.rset)

        columns = list(columns or view.columns)

        try:

            columns.remove('project')

        except ValueError:

            self.info('[ic_progress_table_view] could not remove project from columns')

        view.render(w=self.w, columns=columns)

class ProgressBarView(EntityView):

    """displays a progress bar"""

    __regid__ = 'progressbar'

    title = _('progress bar')

    __select__ = implements(IProgress)

    def cell_call(self, row, col):

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

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

        widget = ProgressBarWidget(entity.done, entity.todo,

                                   entity.revised_cost)

        self.w(widget.render())