#!/usr/bin/env python3

import sys
import time

import pygame


class Piece():
    def rotate(self):
        pass

    def rotate_clockwise(self):
        self.rotate()

    def rotate_counter_clockwise(self):
        self.rotate()


class ZPiece(Piece):
    def __init__(self):
        self.elements = (blue_square, blue_square, None), (None, blue_square, blue_square), (None, None, None)
        self.vertical = False

    def rotate(self):
        if self.vertical:
            self.elements = (blue_square, blue_square, None), (None, blue_square, blue_square), (None, None, None)
        else:
            self.elements = (None, None, blue_square), (None, blue_square, blue_square), (None, blue_square, None)

        self.vertical = not self.vertical


class SPiece(Piece):
    def __init__(self):
        self.elements = (None, None, None), (None, green_square, green_square), (green_square, green_square, None)
        self.vertical = False

    def rotate(self):
        if self.vertical:
            self.elements = (None, green_square, green_square), (green_square, green_square, None), (None, None, None)
        else:
            self.elements = (None, green_square, None), (None, green_square, green_square), (None, None, green_square)

        self.vertical = not self.vertical


class SquarePiece(Piece):
    def __init__(self):
        self.elements = ((white_square, white_square), (white_square, white_square))


class IPiece(Piece):
    def __init__(self):
        self.elements = (None, None, None, None), (None, None, None, None), (red_square, red_square, red_square, red_square), (None, None, None, None)
        self.vertical = False

    def rotate(self):
        if self.vertical:
            self.elements = (None, None, None, None), (None, None, None, None), (red_square, red_square, red_square, red_square), (None, None, None, None)
        else:
            self.elements = (None, None, red_square, None), (None, None, red_square, None), (None, None, red_square, None), (None, None, red_square, None)

        self.vertical = not self.vertical


def refresh_screen():
    screen.fill(black)

    for row_idx, row in enumerate(grid):
        for col_idx, element in enumerate(row):
            if element is not None:
                screen.blit(element, (col_idx * 50 + 1, row_idx * 50 + 1))

    # Display the current piece
    for row_idx, row in enumerate(current_piece.elements):
        for col_idx, element in enumerate(row):
            if element is not None:
                screen.blit(element, ((col_idx + current_piece_position[1]) * 50 + 1, (row_idx + current_piece_position[0]) * 50 + 1))

pygame.init()

black = (0, 0, 0)
white = (0xff, 0xff, 0xff)
blue = (0x10, 0x20, 0xbb)
green = (0x20, 0xbb, 0x10)
red = (0xbb, 0x10, 0x20)

white_square = pygame.Surface((48, 48))
white_square.fill(white)

blue_square = pygame.Surface((48, 48))
blue_square.fill(blue)

green_square = pygame.Surface((48, 48))
green_square.fill(green)

red_square = pygame.Surface((48, 48))
red_square.fill(red)

screen = pygame.display.set_mode((500, 1000))

grid = [[None for _ in range(10)] for _ in range(20)]

# Let's start with a I piece
current_piece = ZPiece()

for row_id, row in enumerate(current_piece.elements):
    if list(filter(lambda x: x is not None, row)):
        break

initial_y_position = -row_id
initial_x_position = (len(grid[0]) // 2) - (len(current_piece.elements[0]) / 2)

current_piece_position = [initial_y_position, initial_x_position]

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()
        elif event.type == pygame.KEYDOWN:
            if event.key in (pygame.K_ESCAPE, pygame.K_q):
                sys.exit()
            if event.key in (pygame.K_DOWN, pygame.K_j):
                current_piece_position[0] += 1
            if event.key in (pygame.K_UP, pygame.K_k):
                current_piece_position[0] -= 1
            if event.key in (pygame.K_RIGHT, pygame.K_l):
                current_piece_position[1] += 1
            if event.key in (pygame.K_LEFT, pygame.K_h):
                current_piece_position[1] -= 1
            if event.key == pygame.K_s:
                current_piece.rotate_clockwise()
            if event.key == pygame.K_d:
                current_piece.rotate_counter_clockwise()

    refresh_screen()
    pygame.display.flip()
    time.sleep(.1)