#!/usr/bin/env python
## CURSES BASIC-MAIL GUI 
# This is the Basic-Mail program, a basic email client written in python
# with a curses interface.
#
# To Run: Go to the Basic-Mail directory and type "python Basic-Mail.py",
#         without the quotes.
##
## chat.py ##
# This is file includes the functions related to editing text.
##

## IMPORTS ##
import curses, curses.ascii, curses.panel  # Curses imports
import traceback, os, sys, select, string  # Random imports

# Initializes and Globalizes (?) the Menus, Tabs, and Title within the
# chat file
def initialize_chat_variables(menu_array,tabs_array,program_title_import):
    global menu, tabs, program_title
    menu = menu_array
    tabs = tabs_array
    program_title = program_title_import

## Function: Clears away part of a line
def redraw_line(window, width, height, x_after_question, y):
    x = width-1
    while (x > x_after_question):
        window.delch(y, x)
        x -= 1
        window.delch(y, x)

## CHAT MODULES ##
# Chat  (Window1, Window2, Window Width, Window Height, Question to Ask)
def chat(window,output_s_win,menu_bar,stdscr,width,height,question):
    ## Asks the user a question, returns the response
    
    # Initializes Chat Variables
    window.keypad(1) # Allows for special keys, e.g. backspace
    y = height/2
    orig_x = 2
    response = ''
    next_line = 0

    window.addstr(y, orig_x, question, curses.color_pair(1))
    window.addch(' ')
    x_after_question = orig_x + len(question)
    x = x_after_question  # Moves x past the question
    redraw_line(window,width,height,x_after_question,y)
    while(1):
        window.addch(y, width-1, '|')
        window.move(y,x)
        input = window.getch(y, x)
        if input == ord('\n') and x > x_after_question:
            redraw_line(window,width,height,x_after_question,y)
            draw_borders(window,width,height)
            x = x_after_question
            break
        elif x == width-3:
            redraw_line(window,width,height,x_after_question,y)
            draw_borders(window,width,height)
            x = x_after_question
            window.addch(y, x_after_question-1,'/',curses.color_pair(1))
            next_line = 1
        elif input == curses.KEY_BACKSPACE and x > x_after_question:
            x -= 1  # Moves input to last space
            response = response[0:-1] # Removes the last char
            window.delch(y, width-1)  # Deletes right border
            window.delch(y, x)
            window.vline(1,width-1,'|',1)  # Redraws Border
        elif next_line == 1 and \
                 input == curses.KEY_BACKSPACE and x == x_after_question:
            window.addstr(response)
            x += len(response)
            window.addch(y, x_after_question-1,' ')
            next_line = 0
        elif curses.ascii.unctrl(input) == "^R":
            draw_screen()
        elif curses.ascii.unctrl(input) == "^F":
            draw_screen()
            hightlight_menu_option(menu_bar,0,2,option1)
            menu_bar.refresh()
        elif curses.ascii.unctrl(input) == "^E":
            draw_screen()
            hightlight_menu_option(menu_bar,0,2+len(option1)+2,option2)
            menu_bar.refresh()
        elif curses.ascii.unctrl(input) == "^H":
            draw_screen()
            hightlight_menu_option(menu_bar,0,2+len(option1)+2+len(option2)+2\
                                   ,option3)
            menu_bar.refresh()
        elif curses.ascii.isctrl(input):
            pass
        elif input > 255 or input == 10:  # Ignores non-ASCII keys and newline
            window.delch(y,x)
            window.delch(y,width-2)
            draw_borders(window,width,height)
        else:
            x += 1  # Moves to next space
            response += curses.ascii.unctrl(input)
            window.addch(input)
    next_line = 0
    return response