'''
   car.py

   Written by Jeff Ondich and friends in class
   on 10 Feb 2010.

   Objects of type Car represent graphical cars
   to be used in a simple 2D graphical animation
   using John Zelle's graphics library.
'''

import time
import random
from graphics import *

class Car:
    def __init__(self, x, y, width, height, color, velocity):
        # Initialize the instance variables.
        self.x = x
        self.y = y
        self.width = width
        self.height = height
        self.color = color
        self.velocity = velocity
        self.body = None
        self.leftTire = None
        self.rightTire = None
        self.windshield = None

        # Now set up the body, tires, and windshield
        self.setUpCarParts()

    def setUpCarParts(self):
        # The body of the car.
        topLeft = Point(self.x, self.y)
        bottomRight = Point(self.x + self.width, self.y + (4 * self.height / 5))
        self.body = Rectangle(topLeft, bottomRight)
        self.body.setFill(self.color)

        # The tires.
        tireRadius = self.width / 7
        center = Point(self.x + 2 * tireRadius, self.y + self.height - tireRadius)
        self.leftTire = Circle(center, tireRadius)
        self.leftTire.setFill(color_rgb(0, 0, 0))
        center = Point(self.x + 5 * tireRadius, self.y + self.height - tireRadius)
        self.rightTire = Circle(center, tireRadius)
        self.rightTire.setFill(color_rgb(0, 0, 0))

        # The windshield.
        windshieldWidth = self.width / 6
        windshieldHeight = self.height / 3
        if self.velocity < 0:
            left = self.x + 5
        else:
            left = self.x + self.width - 5 - windshieldWidth
        topLeft = Point(left, self.y + 5)
        bottomRight = Point(left + windshieldWidth, self.y + 5 + windshieldHeight)
        self.windshield = Rectangle(topLeft, bottomRight)
        self.windshield.setFill(color_rgb(0, 0, 0))

    def draw(self, window):
        self.body.draw(window)
        self.leftTire.draw(window)
        self.rightTire.draw(window)
        self.windshield.draw(window)

    def undraw(self):
        self.body.undraw()
        self.leftTire.undraw()
        self.rightTire.undraw()
        self.windshield.undraw()

    def move(self, dx, dy):
        self.x += dx
        self.y += dy
        self.body.move(dx, dy)
        self.leftTire.move(dx, dy)
        self.rightTire.move(dx, dy)
        self.windshield.move(dx, dy)

    def step(self):
        self.move(self.velocity, 0)

    def reverseDirection(self):
        self.velocity = -self.velocity
        self.setUpCarParts()