#!/usr/bin/env python3

import os, sys, time, pygame

class Button:
    def __init__(self, size, topleft):
        self.up_image = pygame.image.load('button-up.png').convert_alpha()
        self.up_image = pygame.transform.smoothscale(self.up_image, (size, size))

        self.down_image = pygame.image.load('button-down.png').convert_alpha()
        self.down_image = pygame.transform.smoothscale(self.down_image, (size, size))

        self.rect = self.up_image.get_rect()
        self.rect.topleft = topleft

        self.pressed = False

    def draw_on(self, screen):
        if self.pressed:
            screen.blit(self.down_image, self.rect)
        else:
            screen.blit(self.up_image, self.rect)

    def is_pressed(self, pos):
        return self.rect.collidepoint(pos)

    def press(self):
        self.pressed = True

    def unpress(self):
        self.pressed = False
        self.run()

    def run(self):
        print('click')

class CaptureButton(Button):
    countdown = 3

    def __init__(self, size, topleft, photoboite):
        super(CaptureButton, self).__init__(size, topleft)
        self.photoboite = photoboite
        self.elapsed = 0
        self.capture_mode = False
        self.count = 0

    def draw_on(self, screen):
        super(CaptureButton, self).draw_on(screen)
        if self.capture_mode:
            if self.elapsed >= CaptureButton.countdown:
                text = "CLIC!"
            else:
                text = str(CaptureButton.countdown - self.elapsed)
            size = self.photoboite.font.size(text)
            ren = self.photoboite.font.render(text, True, (0, 0, 0))
            topleft = (self.rect.topleft[0] + self.rect.width / 2 - size[0] / 2, self.rect.topleft[1] + self.rect.height / 2 - size[1] / 2)
            screen.blit(ren, topleft)

    def run(self):
        pygame.event.set_blocked((pygame.MOUSEBUTTONDOWN, pygame.MOUSEBUTTONUP))
        self.capture_mode = True

        capture = Capture(self.count)
        self.count += 1

        for i in range(4):
            wait = True
            start = time.time()
            while wait:
                self.elapsed = int(time.time() - start)
                if self.elapsed >= CaptureButton.countdown:
                    wait = False

                self.photoboite.event()
                self.photoboite.draw()
                pygame.display.flip()

            capture.take()
            pygame.time.wait(1000)
        pygame.event.set_allowed((pygame.MOUSEBUTTONDOWN, pygame.MOUSEBUTTONUP))
        self.capture_mode = False


class Capture:
    def __init__(self, uid):
        self.uid = uid
        self.photos = []

    def take(self):
        self.photos.append(Photo(self.uid, len(self.photos)).take())


class Photo:
    def __init__(self, cid, uid):
        self.cid = cid
        self.uid = uid

    def take(self):
        self.name = "%s-%04d-%04d" % (time.strftime('%Y%m%d-%H%M%S'), self.cid, self.uid)
        print("Capture " + self.name)

        return self

class Photoboite:
    def __init__(self):
        self.screen = self.screen()
        pygame.font.init()

        self.background = 255, 255, 255
        self.buttons = []

        button_size = int(self.screen.get_width() / 4)
        topleft = self.screen.get_width() - button_size - 20, self.screen.get_height() / 4 - button_size / 2

        self.buttons.append(CaptureButton(button_size, topleft, self))

        self.camera = pygame.Rect(20, 20, self.screen.get_width() - self.screen.get_width() / 4 - 60, self.screen.get_height() - 40)

        self.font = pygame.font.Font(pygame.font.match_font('calibri'), 180)


    def screen(self):
        if os.getenv('DISPLAY'):
            pygame.display.init()
            return pygame.display.set_mode((1280, 768))
        else:
            drivers = ['directfb', 'fbcon', 'svgalib']
            found = False
            for driver in drivers:
                if not os.getenv('SDL_VIDEODRIVER'):
                    os.putenv('SDL_VIDEODRIVER', driver)
                try:
                    pygame.display.init()
                except pygame.error as e:
                    print('Driver: {0} failed.'.format(driver))
                    continue
                found = True
                break

            if not found:
               raise Exception('No suitable video driver found!')

            return pygame.display.set_mode()

    def draw(self):
        self.screen.fill(self.background)

        self.screen.fill((0,0,0), rect=self.camera)

        for button in self.buttons:
            button.draw_on(self.screen)

    def event(self):
        for event in pygame.event.get():
            if event.type == pygame.QUIT or event.type == pygame.KEYDOWN and event.unicode == 'q':
                sys.exit()
            elif event.type == pygame.MOUSEBUTTONDOWN:
                for button in self.buttons:
                    if button.is_pressed(event.pos):
                        button.press()
            elif event.type == pygame.MOUSEBUTTONUP:
                for button in self.buttons:
                    if button.is_pressed(event.pos):
                        button.unpress()

    def run(self):
        pressed = False
        while True:
            self.event()
            self.draw()

            pygame.display.flip()

Photoboite().run()