#!/usr/bin/python3
from math import sin,cos,radians
from time import sleep
import pygame
def berechne_dreieck(alpha,c):
    alpha = radians(alpha)
    a = cos(alpha)*c# x
    b = -sin(alpha)*c# y
    return a,b

def get_debug_text():
    def text(text,line_counter):
        debug_text = default_font.render(str(text), True, (0,0,0))
        screen.blit(debug_text,(0,line_counter*default_font.get_height()))

    line_counter = 1
    globalvars = globals()
    for a in globalvars:
        text(f"{str(a)} = {str(globalvars[a])}",line_counter)
        line_counter += 1

def centered_text(text=str,pos=tuple,color=tuple):
    text = default_font.render(str(text), True, color)
    screen.blit(text,(pos[0]-text.get_width()/2,pos[1]))
def get_best_size():
    if screensize[0] <= screensize[1]:
        best = screensize[0]
    else:
        best = screensize[0]
    return best

pygame.init()
clock = pygame.time.Clock()
screen = pygame.display.set_mode([500,500],pygame.RESIZABLE)
screensize = pygame.display.get_window_size()
default_font = pygame.font.SysFont("sans", 14)

start_pos = screensize[0]/2,screensize[1]/2#(10,screensize[1]-10)
winkel = 0
best_radios = get_best_size()/2-20

running = True
if __name__ == "__main__":
    while running:
        screen.fill((255,255,255))
        pressed_keys = pygame.key.get_pressed()

        if pressed_keys[pygame.K_ESCAPE]:
            exit()
        if pressed_keys[pygame.K_UP]:
            winkel += 1
        if pressed_keys[pygame.K_DOWN]:
            winkel -= 1

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                exit()
            if event.type == pygame.WINDOWRESIZED:
                screensize = pygame.display.get_window_size()
                start_pos = screensize[0]/2,screensize[1]/2#(10,screensize[1]-10)
                screen.fill((0,0,0))
                best_radios = get_best_size()/2-20
        if winkel >= 360 or winkel <= -1:
            winkel = 0
        a,b = berechne_dreieck(winkel,200)#screensize[0]*screensize[1])

        end_pos = start_pos[0]+a,start_pos[1]+b
        # draw c   schwarz
        pygame.draw.line(screen,(0,0,0),start_pos,end_pos,3)
        centered_text("c",(end_pos[0]+10,end_pos[1]+10),(0,0,0))
        # draw a   rot
        pygame.draw.line(screen,(255,0,0),start_pos,(start_pos[0]+a,start_pos[1]),3)
        centered_text("a",(start_pos[0]+10,start_pos[1]+10),(255,0,0))
        # draw b   blau
        pygame.draw.line(screen,(0,0,255),(start_pos[0]+a,start_pos[1]),(start_pos[0]+a,start_pos[1]+b),3)
        centered_text("b",(start_pos[0]+a+10,start_pos[1]+10),(0,0,255))

        get_debug_text()
        pygame.display.flip()
        clock.tick(30)
        #sleep(1)
        winkel += 1