class Shop(pygame.sprite.Sprite):

    def __init__(self, x, y):
        pygame.sprite.Sprite.__init__(self)
        self.image = load_img('scenery', 'shop.png')
        self.rect = self.image.get_rect()
        self.rect.topleft = x, y
        self.active = False
        self.selections = [["", # This first group is the seed purchase text
                            ""],
                           ["", # This second group is the wheat selling text
                            ""],
                           ""]  # This last string is the leaving text
        self.maxseeds = 0
        self.selection = 0

    def open(self):
        self.update()
        self.active = True
        self.selection = 0

    def close(self):
        self.active = False

    def update(self):
        self.maxseeds = int(farmer.gold/2)
        self.selections = [["Buy %d seeds" % (self.maxseeds),
                            "This will cost %d gold" % (self.maxseeds * 2)],
                           ["Sell %d wheat" % (farmer.wheat),
                            "You will gain %d gold" % (farmer.wheat * 3)],
                           "Leave shop (Esc)"]

    def up_selection(self):
        self.selection -= 1
        if self.selection < 0:
            self.selection = 2

    def down_selection(self):
        self.selection += 1
        if self.selection > 2:
            self.selection = 0

    def make_selection(self):
        if self.selection == 0:                    # If the player wishes to buy seeds (all or none, for now)
            farmer.gold -= self.maxseeds * 2
            farmer.seeds += self.maxseeds
            self.update()
        elif self.selection == 1:                # If the player wishes to sell wheat (all or none, for now)
            farmer.gold += farmer.wheat * 3
            farmer.wheat = 0
            self.update()
        elif self.selection == 2:                # If the player wishes to leave the shop
            self.close()

            elif entity.__class__.__name__ == 'Shop':
                shop = entity
                shop.open()

    # 상점 인터페이스를 생성한다
    global shopinterface
    shopinterface = pygame.Surface((192, 256))
    shopinterface.convert()
    shopinterfaceimage = load_img("hud", "shop.png")
    shopinterface.blit(shopinterfaceimage, (0, 0))

            elif char == 'S':
                global shop
                shop = Shop(blockx, blocky)
                objectlist.append(shop)

# 입력 체크
        for event in pygame.event.get():
            if event.type == QUIT:
                return
            elif event.type == KEYDOWN:
                if event.key == K_ESCAPE:
                    if shop.active:
                        shop.close()
                    else:
                        return
                elif event.key == K_UP:
                    if shop.active:
                        shop.up_selection()
                    else:
                        farmer.move("up")
                elif event.key == K_DOWN:
                    if shop.active:
                        shop.down_selection()
                    else:
                        farmer.move("down")
                elif event.key == K_LEFT:
                    if shop.active:
                        pass
                    else:
                        farmer.move("left")
                elif event.key == K_RIGHT:
                    if shop.active:
                        pass
                    else:
                        farmer.move("right")
                elif event.key == K_SPACE:
                    if shop.active:
                        shop.make_selection()
                    else:
                        farmer.interact()
                elif event.key == K_TAB:
                    pass

def update_shop_text():
    font = pygame.font.SysFont('calibri', 20)
    textpos_base = pygame.Rect((0, 0), (160, 20))

    seed_text_color = (0,0,0)
    wheat_text_color = (0,0,0)
    leave_text_color = (0,0,0)
    if shop.selection == 0:
        seed_text_color = (120,120,230)
    elif shop.selection == 1:
        wheat_text_color = (120,120,230)
    elif shop.selection == 2:
        leave_text_color = (120,120,230)

    spacer = 0
    for line in shop.selections[0]:
        buy_seeds_text = font.render(line, 1, seed_text_color)
        buy_seeds_textpos = pygame.Rect((10, 60+spacer), (buy_seeds_text.get_width(), buy_seeds_text.get_height()))
        shopinterface.blit(buy_seeds_text, buy_seeds_textpos)
        spacer += 24

    spacer = 0
    for line in shop.selections[1]:
        buy_wheat_text = font.render(line, 1, wheat_text_color)
        buy_wheat_textpos = pygame.Rect((10, 140+spacer), (buy_wheat_text.get_width(), buy_wheat_text.get_height()))
        shopinterface.blit(buy_wheat_text, buy_wheat_textpos)
        spacer += 24

    leave_text = font.render(shop.selections[2], 1, leave_text_color)
    leave_textpos = pygame.Rect((10, 225), (leave_text.get_width(), leave_text.get_height()))
    shopinterface.blit(leave_text, leave_textpos)

        # 상점을 연다
        if shop.active:
            screen.blit(shopinterface, (224, 144))
            shopinterface.blit(shopinterfaceimage, (0, 0))
            update_shop_text()
            pass