# -*- coding: utf-8 -*-

full_screen = True
window_size = (1024, 768)

import sys, random, pygame, threading, time
from pygame.locals import *
from math import *

background_color = (0,0,0)
white=(255,255,255)
red=(255,0,0)
green=(0,255,0)
yellow=(255,255,0)
blue=(0,0,255)
cyan=(51,255,255)
purple=(153,51,153)

colors=[red,green,yellow,cyan,blue,purple]
colors_no_load=[cyan,blue,purple]
letter_colors=['A','a']

time_blank=250
time_letter=500

W=900
H=600
height_letter=20 
ntrials=1


circles = ((-1,1),)#((0, 1),) #coordinates of yellow target# -1 = to left
#if (0,1) at the middle 
circle_scale = 0.3# scale of coordinate of yellow target
#if 1=> 1 unit <=> half of screen height and target position
#at top lim of screen
circle_radius = 8 #radius of yellow target
n_grid = 6#3 => taille grille; si 3=> grid confined within the screen
grid_spacing = 0.2 # space between crosses
grid_length = 0.05 # length of grid crosses
grid_width = 2 #thickness of grid crosses
fix_radius = 25#size of central dehiscence
rotation_speed = 20*pi/2#pi/2
bg_color = (0, 0, 0)
grid_color = (100, 100, 255)#blue grid
circle_color = (255, 255, 0)#yellow target
disapp_frames = 1 # I don t know ??



window_center = (window_size[0]/2.0, window_size[1]/2.0)
window_scale = min(window_size)/2.0
def coord(real):
    """takes real coordinates, returns pixel coordinates"""
    return (int(round(real[0]*window_scale + window_center[0])),\
            int(round(-real[1]*window_scale + window_center[1])))

g_cos, g_sin = 1, 0
def set_rotation(angle):
    """sets up rotation"""
    global g_cos, g_sin
    g_cos, g_sin = cos(angle), sin(angle)
def rotate(point):
    """rotates a 3D point about the Z-axis by given angle set by set_rotation()"""
    return (g_cos*point[0] + g_sin*point[1], -g_sin*point[0] + g_cos*point[1])

def thread_letter():

    for trial in range(ntrials):
 #       surf.fill(bg_color)
        pygame.display.flip()
        pygame.time.wait(time_blank)
        theletter=random.randrange(len(letter_colors))
        thecolor=random.randrange(len(colors))
        police = pygame.font.Font(None, height_letter)
        letter_to_display=police.render(letter_colors[theletter],1,colors[thecolor])
        surf.blit(letter_to_display, coord((0, 0)))
        pygame.display.flip()
 #       surf.fill(bg_color)
        pygame.time.wait(time_letter)
        time.sleep(0.25) 


# graphics initializations
frames, show = 0, True
try:
    pygame.init()
    if full_screen:
        surf = pygame.display.set_mode(window_size, HWSURFACE | FULLSCREEN | DOUBLEBUF)
    else:
        surf = pygame.display.set_mode(window_size)

        
    #police  ICI  LETTRES TOURNENT UNE FOIS PUIS LE GRID SE LANCE
    # TROP SEQUENTIEL ++++    


    

    t0 = pygame.time.get_ticks()
    while True:
        for event in pygame.event.get():
            if event.type in (QUIT, KEYDOWN): raise Exception()
            elif event.type == MOUSEBUTTONDOWN: frames, show = 0, False
            elif event.type == MOUSEBUTTONUP: frames, show = 0, True

        surf.fill(bg_color)
        t = (pygame.time.get_ticks() - t0)/1000.0
        set_rotation(rotation_speed*t)
        for i in range(-n_grid, +n_grid + 1): #i(-3,4) # n_grid : total grid size:3 at onset
            for j in range(-n_grid, +n_grid + 1): #j(-3,4)
                center = (grid_spacing*i, grid_spacing*j)
                #
                fr = rotate    ((center[0] - grid_length    ,         center[1]))
                to = rotate    ((center[0] + grid_length    ,         center[1]))
                #
                pygame.draw.line(surf, grid_color, coord(fr), coord(to), grid_width)
                #
                fr = rotate    ((center[0]                  ,     center[1] - grid_length))
                to = rotate    ((center[0]                  ,     center[1] + grid_length))
                #
                pygame.draw.line(surf, grid_color, coord(fr), coord(to), grid_width)
                #
        for circ in circles:
            c = (circle_scale*circ[0], circle_scale*circ[1])
            if show: # show=0   graphics initialization
                col = (150, 150, 0)# color of yellow target (if (250,250,0) + flashy)
                pygame.draw.circle(surf, col, coord(c), circle_radius, 0) #draw target
            else:
                step = 150/disapp_frames
                lev = max(0, 150 - frames*step)
                col = (lev, lev, 0)
                if lev > 0:
                    pygame.draw.circle(surf, col, coord(c), circle_radius, 0)
        pygame.draw.circle(surf, bg_color, coord((0, 0)), fix_radius)# central dehiscence
        pygame.display.flip()
        frames += 1

        #ICI LE BLOC   NE FAIT Q TOURNER TOUT SEUL GRID ARRETE
        # GRID SE DEPLACE D UN DEGRE apres chaque serie de  LETTRES
        
        stop=False
        thread=threading.Thread(group=None, target=thread_letter, name=None, args=(), kwargs={})
        thread.start()
        stop=True
        thread.join()
 #       time.sleep(0.25)
    


        
finally: pygame.quit()