"""
Windows specific to a MUC
"""

import logging
log = logging.getLogger(__name__)

import curses

from . import Win, g_lock

import poopt
from config import config
from theming import to_curses_attr, get_theme

class UserList(Win):
    def __init__(self):
        Win.__init__(self)
        self.pos = 0

    def scroll_up(self):
        self.pos += self.height-1
        return True

    def scroll_down(self):
        pos = self.pos
        self.pos -= self.height-1
        if self.pos < 0:
            self.pos = 0
        return self.pos != pos

    def draw_plus(self, y):
        self.addstr(y, self.width-2, '++', to_curses_attr(get_theme().COLOR_MORE_INDICATOR))

    def refresh(self, users):
        log.debug('Refresh: %s', self.__class__.__name__)
        if config.get("hide_user_list", False):
            return # do not refresh if this win is hidden.
        with g_lock:
            self._win.erase()
            if config.get('user_list_sort', 'desc').lower() == 'asc':
                y, x = self._win.getmaxyx()
                y -= 1
                users = sorted(users)
            else:
                y = 0
                users = sorted(users)

            if len(users) < self.height:
                self.pos = 0
            elif self.pos >= len(users) - self.height and self.pos != 0:
                self.pos = len(users) - self.height
            for user in users[self.pos:]:
                self.draw_role_affiliation(y, user)
                self.draw_status_chatstate(y, user)
                self.addstr(y, 2,
                        poopt.cut_by_columns(user.nick, self.width - 2),
                        to_curses_attr(user.color))
                if config.get('user_list_sort', 'desc').lower() == 'asc':
                    y -= 1
                else:
                    y += 1
                if y == self.height:
                    break
            # draw indicators of position in the list
            if self.pos > 0:
                if config.get('user_list_sort', 'desc').lower() == 'asc':
                    self.draw_plus(self.height-1)
                else:
                    self.draw_plus(0)
            if self.pos + self.height < len(users):
                if config.get('user_list_sort', 'desc').lower() == 'asc':
                    self.draw_plus(0)
                else:
                    self.draw_plus(self.height-1)
            self._refresh()

    def draw_role_affiliation(self, y, user):
        theme = get_theme()
        color = theme.color_role(user.role)
        symbol = theme.char_affiliation(user.affiliation)
        self.addstr(y, 1, symbol, to_curses_attr(color))

    def draw_status_chatstate(self, y, user):
        show_col = get_theme().color_show(user.show)
        if user.chatstate == 'composing':
            char = get_theme().CHAR_CHATSTATE_COMPOSING
        elif user.chatstate == 'active':
            char = get_theme().CHAR_CHATSTATE_ACTIVE
        elif user.chatstate == 'paused':
            char = get_theme().CHAR_CHATSTATE_PAUSED
        else:
            char = get_theme().CHAR_STATUS
        self.addstr(y, 0, char, to_curses_attr(show_col))

    def resize(self, height, width, y, x):
        with g_lock:
            separator = to_curses_attr(get_theme().COLOR_VERTICAL_SEPARATOR)
            self._resize(height, width, y, x)
            self._win.attron(separator)
            self._win.vline(0, 0, curses.ACS_VLINE, self.height)
            self._win.attroff(separator)

class Topic(Win):
    def __init__(self):
        Win.__init__(self)
        self._message = ''

    def refresh(self, topic=None):
        log.debug('Refresh: %s', self.__class__.__name__)
        with g_lock:
            self._win.erase()
            if topic:
                msg = topic[:self.width-1]
            else:
                msg = self._message[:self.width-1]
            self.addstr(0, 0, msg, to_curses_attr(get_theme().COLOR_TOPIC_BAR))
            (y, x) = self._win.getyx()
            remaining_size = self.width - x
            if remaining_size:
                self.addnstr(' '*remaining_size, remaining_size,
                             to_curses_attr(get_theme().COLOR_INFORMATION_BAR))
            self._refresh()

    def set_message(self, message):
        self._message = message