#! /usr/bin/python3
# ===================================================================
# test converting center/window coordinates
# ===================================================================

import coordinate_conversion as cc
import user_interface as ui
import sys

wheight = 800        # window height 
wwidth  = 800        # window width

# -------------------------------------------------------------------
# ---- main
# -------------------------------------------------------------------

# ---- running Python3?

if not ui.running_python3():

    print()
    print('Error: you must run Python3 - exit program')
    print()
    sys.exit()

# ---- print title

print()
print('Convert Center/Window Coordinates')

# ---- user input loop

while True:

    # ---- get X coordinate

    print()
    x = ui.get_user_input('Enter X coord: ')
    
    if not x:
        break

    if not ui.is_a_number(x):
        print()
        print("Error, bad X coordinate")
        continue

    x = float(x)

    # ---- get Y coordinate

    print()
    y = ui.get_user_input('Enter Y coord: ')

    if not y:
        break

    if not ui.is_a_number(y):
        print()
        print("Error, bad Y coordinate")
        continue

    y = float(y)

    # ---- get selection

    print()
    print('[wW] Convert center to window coordinates')
    print('[cC] convert window to center coordinates')
    print('[eE] Exit')
    print('Enter anything else to continue')

    print()
    s = ui.get_user_input('Enter selection: ')

    if not s:

        continue

    elif s[0] == 'e' or s[0] == 'E':

        break

    elif s[0] == 'w' or s[0] == 'W':

        print()
        print('Converted center coordinates to window coordinates')

        x,y = cc.center_to_win_coords(x,y,wwidth,wheight)

    elif s[0] == 'c' or s[0] == 'C':

       print()
       print('Converted window coordinates to center coordinates')

       x,y = cc.win_to_center_coords(x,y,wwidth,wheight)

    else:

       continue

    # ---- print conversion results

    print()
    print(f'X = {x}, Y = {y}')

    ui.pause()

print()