"""
Module defining the global info bar

This window is the one listing the current opened tabs in poezio.
The GlobalInfoBar can be either horizontal or vertical
(VerticalGlobalInfoBar).
"""
import logging
log = logging.getLogger(__name__)

import curses


from config import config
from . import Win
from theming import get_theme, to_curses_attr

class GlobalInfoBar(Win):
    def __init__(self):
        Win.__init__(self)

    def refresh(self):
        log.debug('Refresh: %s', self.__class__.__name__)
        self._win.erase()
        self.addstr(0, 0, "[", to_curses_attr(get_theme().COLOR_INFORMATION_BAR))

        create_gaps = config.get('create_gaps')
        show_names = config.get('show_tab_names')
        show_nums = config.get('show_tab_numbers')
        use_nicks = config.get('use_tab_nicks')
        show_inactive = config.get('show_inactive_tabs')
        # ignore any remaining gap tabs if the feature is not enabled
        if create_gaps:
            sorted_tabs = self.core.tabs[:]
        else:
            sorted_tabs = [tab for tab in self.core.tabs if tab]

        for nb, tab in enumerate(sorted_tabs):
            if not tab: continue
            color = tab.color
            if not show_inactive and color is get_theme().COLOR_TAB_NORMAL:
                continue
            try:
                if show_nums or not show_names:
                    self.addstr("%s" % str(nb), to_curses_attr(color))
                    if show_names:
                        self.addstr(' ', to_curses_attr(color))
                if show_names:
                    if use_nicks:
                        self.addstr("%s" % str(tab.get_nick()), to_curses_attr(color))
                    else:
                        self.addstr("%s" % tab.name, to_curses_attr(color))
                self.addstr("|", to_curses_attr(get_theme().COLOR_INFORMATION_BAR))
            except:             # end of line
                break
        (y, x) = self._win.getyx()
        self.addstr(y, x-1, '] ', to_curses_attr(get_theme().COLOR_INFORMATION_BAR))
        (y, x) = self._win.getyx()
        remaining_size = self.width - x
        self.addnstr(' '*remaining_size, remaining_size,
                     to_curses_attr(get_theme().COLOR_INFORMATION_BAR))
        self._refresh()

class VerticalGlobalInfoBar(Win):
    def __init__(self, scr):
        Win.__init__(self)
        self._win = scr

    def refresh(self):
        height, width = self._win.getmaxyx()
        self._win.erase()
        sorted_tabs = [tab for tab in self.core.tabs if tab]
        if not config.get('show_inactive_tabs'):
            sorted_tabs = [tab for tab in sorted_tabs if\
                               tab.vertical_color != get_theme().COLOR_VERTICAL_TAB_NORMAL]
        nb_tabs = len(sorted_tabs)
        use_nicks = config.get('use_tab_nicks')
        if nb_tabs >= height:
            for y, tab in enumerate(sorted_tabs):
                if tab.vertical_color == get_theme().COLOR_VERTICAL_TAB_CURRENT:
                    pos = y
                    break
            # center the current tab as much as possible
            if pos < height//2:
                sorted_tabs = sorted_tabs[:height]
            elif nb_tabs - pos <= height//2:
                sorted_tabs = sorted_tabs[-height:]
            else:
                sorted_tabs = sorted_tabs[pos-height//2 : pos+height//2]
        asc_sort = (config.get('vertical_tab_list_sort') == 'asc')
        for y, tab in enumerate(sorted_tabs):
            color = tab.vertical_color
            if asc_sort:
                y = height - y - 1
            self.addstr(y, 0, "%2d" % tab.nb,
                    to_curses_attr(get_theme().COLOR_VERTICAL_TAB_NUMBER))
            self.addstr('.')
            if use_nicks:
                self.addnstr("%s" % tab.get_nick(), width - 4, to_curses_attr(color))
            else:
                self.addnstr("%s" % tab.name, width - 4, to_curses_attr(color))
        separator = to_curses_attr(get_theme().COLOR_VERTICAL_SEPARATOR)
        self._win.attron(separator)
        self._win.vline(0, width-1, curses.ACS_VLINE, height)
        self._win.attroff(separator)
        self._refresh()
