"""
open/dulcinea/lib/ui/link_triple.qpy
"""
from dulcinea.link_triple import get_link_triple_db
from dulcinea.ui.user.util import ensure_admin_access
from qp.fill.directory import Directory
from qp.fill.form import Form
from qp.fill.html import href
from qp.fill.widget import CompositeWidget, SubmitWidget, StringWidget
from qp.pub.common import get_request, redirect, header, footer

class LinkTripleWidget(CompositeWidget):
    """
    value: (url:str, text:str, title:str)
    """

    def __init__(self, name, value=None,
                 url_hint=('Where you go when this link is clicked. '
                           'e.g. /tool/34/ or http://google.com'),
                 text_hint=('The hypertext for this link. i.e. the '
                            '"clickable" part'),
                 title_hint=('Title is displayed when the cursor hovers on '
                             'the link'),
                 **kwargs):
        CompositeWidget.__init__(self, name, value=value, **kwargs)
        self.add(StringWidget, 'url', title='URL', value=value and value[0],
                 size=60, hint=url_hint)
        self.add(StringWidget, 'text', title='Text', value=value and value[1],
                 size=60, hint=text_hint)
        self.add(StringWidget, 'title', title='Title', value=value and value[2],
                 size=60, hint=title_hint)

    def _parse(self, request):
        if self.get('url') and self.get('text'):
            self.value = self.get('url'), self.get('text'), self.get('title')
        else:
            self.value = None

class LinkTripleDirectory(Directory):

    def get_exports(self):
        yield ('', '_q_index', 'SideBar Links', None)
        yield ('new', 'new', 'New', 'Make a new sidebar link.')

    def _q_index:xml(self):
        ensure_admin_access()
        title = 'SideBar Links'
        header(title)
        links = get_link_triple_db().get_links()
        if links:
            '<dl>'
            for index, triple in enumerate(links):
                '<dt>%s</dt>' % href('new?%d' % index, '[Insert New Link]',
                                     css_class="smallaction")
                '<dd>%s</dd>' % _format_link_triple(triple, index)
            '</dl>'
        else:
            '<p>No sidebar links defined</p>'
        href('new', '[Append New Link]', css_class="smallaction")
        footer(title)

    def new(self):
        ensure_admin_access()
        form = Form()
        form.add(LinkTripleWidget, 'link', title='Link')
        form.add(SubmitWidget, 'submit', 'Submit')
        form.add(SubmitWidget, 'cancel', 'Cancel')
        if form.get('cancel'):
            redirect('.')
        if not form.is_submitted() or form.has_errors():
            def render:xml(title):
                header(title)
                form.render()
                footer(title)
            return render('New SideBar Link')
        link = form.get('link')
        if link:
            try:
                index = int(get_request().get_query())
            except ValueError:
                index = None
            get_link_triple_db().insert_link(link, index)
        redirect('.')

    def _q_lookup(self, component):
        try:
            index = int(component) - 1
            triple = get_link_triple_db().get(index)
            if triple:
                return LinkTripleEditDirectory(index, triple)
        except ValueError:
            return None


class LinkTripleEditDirectory(Directory):

    def __init__(self, index, triple):
        self.index = index
        self.triple = triple

    def get_exports(self):
        yield ('edit', 'edit', self.triple[1], None)
        yield ('delete', 'delete', None, None)

    def edit(self):
        ensure_admin_access()
        form = Form()
        form.add(LinkTripleWidget, 'link', value=self.triple, title='Link')
        form.add(SubmitWidget, 'submit', 'Save Changes')
        form.add(SubmitWidget, 'cancel', 'Cancel')
        if form.get('cancel'):
            redirect('..')
        if not form.is_submitted() or form.has_errors():
            def render:xml(title):
                header(title)
                form.render()
                footer(title)
            return render('Edit SideBar Link')
        link = form.get('link')
        if link:
            get_link_triple_db()[self.index] = link
        redirect('..')

    def delete(self):
        ensure_admin_access()
        form = Form()
        form.add(SubmitWidget, 'delete', 'Delete')
        form.add(SubmitWidget, 'cancel', 'Cancel')
        if form.get('cancel'):
            redirect('..')
        if not form.is_submitted():
            def render:xml(title):
                header(title)
                _format_link_triple(self.triple)
                form.render()
                footer(title)
            return render("Delete SideBar Link")
        del get_link_triple_db()[self.index]
        redirect('..')


def _format_link_triple:xml(triple, index=None):
    # If index is provided, it must be an int, and actions are rendered.
    '<table class="shaded">'
    '<tr><th colspan="2">'
    href(*triple)
    if index is not None:
        href('%d/edit' % (index + 1), '[Edit]', css_class="smallaction")
        href('%d/delete' % (index + 1), '[Delete]', css_class="smallaction")
    '</th></tr>'
    """
    <tr><th>URL</th><td>%s</td></tr>
    <tr><th>Text</th><td>%s</td></tr>
    <tr><th>Title</th><td>%s</td></tr>
    </table>""" % triple