import pygame
from pygame import gfxdraw
from pygame import freetype
from . import HEIGHT, WIDTH
from .math import add

OFFSET = (WIDTH/2, HEIGHT/2)
FONT = None

def init():
    global FONT
    freetype.init()
    FONT = freetype.SysFont('Arial', 16)

def line(surface, color, start, end, width=0):
    pygame.draw.line(surface, color,
                     add(*OFFSET, *start), add(*OFFSET, *end), width)


def polygon(surface, color, vertices, width):
    translated = [add(*OFFSET, *vertex) for vertex in vertices]
    pygame.draw.polygon(surface, color, translated, width)


def rect(surface, color, x, y, height, width, stroke_width):
    pygame.draw.rect(surface, color,
                     pygame.Rect(OFFSET[0] + x, OFFSET[1] + y, height, width),
                     stroke_width)


def pixel(surface, color, x, y):
    gfxdraw.pixel(surface,
                  int(OFFSET[0] + x),
                  int(OFFSET[1] + y),
                  color)

def text(surface, color, position, text):
    FONT.render_to(surface, add(*OFFSET, *position), text, color)

def text_screen(surface, color, position, text):
    FONT.render_to(surface, position, text, color)