#!/usr/bin/env python
# -*- coding: utf-8 -*-

import urwid
import urwid.curses_display

import locale

from widget import WidgetWrap, Divider, Text, SolidFill, Columns, Pile
from graphics import LineBox
from escape import utf8decode

class Conversation(object):
        def __init__(self):
                self.items = urwid.SimpleListWalker(
                        [self.new_question()])
                self.listbox = urwid.ListBox(self.items)
                instruct = urwid.Text("Press F8 to exit.")
                header = urwid.AttrWrap( instruct, 'header' )
                ### Testing - please comment any appropiate part ... ###
                # 1.) full argument listing
                self.top = LineBox(urwid.Frame(self.listbox, header), Text(utf8decode('HELLO')), align = 'center')
                # 2.) default value of an align
                self.top = LineBox(urwid.Frame(self.listbox, header), Text(utf8decode('HELLO')))
                # 3.) left align
                self.top = LineBox(urwid.Frame(self.listbox, header), Text(utf8decode('HELLO')), align = 'left')
                # 4.) no title
                self.top = LineBox(urwid.Frame(self.listbox, header))
                self.top = urwid.AttrWrap(self.top, 'I say')

        def main(self):
                self.ui = urwid.curses_display.Screen()
                self.ui.register_palette([
                        ('header', 'black', 'dark cyan', 'standout'),
                        ('I say', 'black', 'light gray', 'standout'),
                        ])
                self.ui.run_wrapper( self.run )
        
        def run(self):
                size = self.ui.get_cols_rows()

                while True:
                        self.draw_screen( size )
                        keys = self.ui.get_input()
                        if "f8" in keys:
                                break
                        for k in keys:
                                if k == "window resize":
                                        size = self.ui.get_cols_rows()
                                        continue
                                self.top.keypress( size, k )
                        if keys:
                                name = self.items[0].edit_text
                                self.items[1:2] = [self.new_answer(name)]
        
        def draw_screen(self, size):
                canvas = self.top.render( size, focus=True )
                self.ui.draw_screen( size, canvas )

        def new_question(self):
                return urwid.Edit(('I say',"What is your name?\n"))

        def new_answer(self, name):
                return urwid.Text(('I say',"Nice to meet you, "+name+"\n"))

Conversation().main()