# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.apps import apps
from django.utils.html import mark_safe, escape


def get_instance_link(index_instance_node):
    """
    Return an HTML anchor to an index node instance
    """

    return mark_safe(
        '<a href="{url}">{text}</a>'.format(
            url=index_instance_node.get_absolute_url(),
            text=escape(index_instance_node.get_full_path())
        )
    )


def index_instance_item_link(index_instance_item):
    IndexInstanceNode = apps.get_model(
        app_label='document_indexing', model_name='IndexInstanceNode'
    )

    if isinstance(index_instance_item, IndexInstanceNode):
        if index_instance_item.index_template_node.link_documents:
            icon_template = '<i class="fa fa-folder"></i>'
        else:
            icon_template = '<i class="fa fa-level-up fa-rotate-90"></i>'
    else:
        icon_template = ''

    return mark_safe(
        '%(icon_template)s&nbsp;<a href="%(url)s">%(text)s</a>' % {
            'url': index_instance_item.get_absolute_url(),
            'icon_template': icon_template,
            'text': index_instance_item
        }
    )


def node_level(node):
    """
    Render an indented tree like output for a specific node
    """

    return mark_safe(
        ''.join(
            [
                '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;' * node.get_level(),
                '' if node.is_root_node() else '<i class="fa fa-level-up fa-rotate-90"></i> ',
                unicode(node)
            ]
        )
    )


def node_tree(node, user):
    result = []

    result.append('<div class="list-group">')

    for ancestor in node.get_ancestors(include_self=True):
        if ancestor.is_root_node():
            element = node.index()
            level = 0
            icon = 'fa fa-list-ul'
        else:
            element = ancestor
            level = element.get_level()
            if element.index_template_node.link_documents:
                icon = 'fa fa-folder'
            else:
                icon = 'fa fa-level-up fa-rotate-90'

        result.append(
            '<a href="{url}" class="list-group-item {active}"><span class="badge">{count}</span><i class="{icon}"></i>{space} {text}</a>'.format(
                url=element.get_absolute_url(),
                active='active' if element == node or node.get_ancestors(include_self=True).count() == 1 else '',
                count=element.get_item_count(user=user),
                icon=icon,
                space='&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;' * level,
                text=escape(element)
            )
        )

    result.append('</div>')

    return mark_safe(''.join(result))
