# vim:fileencoding=utf-8
# License: GPL v3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
from __python__ import hash_literals, bound_methods

from dom import set_css
from elementmaker import E
from gettext import gettext as _

from book_list.item_list import create_item, build_list
from read_book.toc import get_toc_maps, get_border_nodes
from read_book.globals import current_book


def create_goto_list(onclick):
    ans = E.div()
    items = v'[]'
    toc = current_book().manifest.toc
    id_map = get_toc_maps(toc)[1]
    before, after = get_border_nodes(toc, id_map)
    if after:
        items.push(create_item(_('Next Section'), icon='caret-right', subtitle=after.title, action=onclick.bind(None, after.dest, after.frag)))
    if before:
        items.push(create_item(_('Previous Section'), icon='caret-left', subtitle=before.title, action=onclick.bind(None, before.dest, before.frag)))
    build_list(ans, items)
    return ans


def get_next_section(forward):
    toc = current_book().manifest.toc
    id_map = get_toc_maps(toc)[1]
    before, after = get_border_nodes(toc, id_map)
    return after if forward else before


def create_goto_panel(book, container, onclick):
    panel = create_goto_list(onclick)
    set_css(container, display='flex', flex_direction='column')
    set_css(panel, flex_grow='10')
    container.appendChild(panel)