RIGHT = 1
LEFT = -1
REVERSE_DIRECTION = -6
FORWARD = 1
REVERSE = 0

#gears and allowable speeds are as follows:
    #zero (reverse) (speed -1 to -10). Max reverse speed of car is -10
    #one (speed 0 to 10)
    #two (speed 5 to 25)
    #three (speed 20 to 40)
    #four (speed 40 to 60)
    #five (speed 45 to 80). Max speed of car is 80
    #gears change automatically, one gear at a time

#direction values are similar to numbers on clock face
#0 = 12 = straight on. All other directions = 1-11

class Car:
    def __init__(self):
        self.speed = 0
        self.gear = 1
        self.direction = 0
        self.broken = False #indicates whether car is broken
        self.simulation = []
        self.simulation_loaded = True
        self.commands = []
        self.vector = "FORWARD"



    def accelerate(self):
        if self.broken == True:
            print("the car is broken.")
            return
        else:
            print("Accelerating..")
            if self.vector == "REVERSE":
                self.speed -= 5
            elif self.vector == "FORWARD":
                self.speed += 5

            if self.speed > 80:
                self.speed = 80
            if self.speed < -10:
                self.speed = -10

        self.change_gear(self.gear)
        self.display_stats()


        #change gear if necessary (automatic)
        #display status

    def brake(self):
        if self.broken == True:
            print("the car is broken.")
            return
        else:
            print("Breaking...")
            if self.speed < 0:
                self.speed += 5
                #print ("the care is in reverse")

            elif self.speed > 0 < 80:
                #print ("the car is in a forward gear")
                self.speed -5
                #print ("breaking..." )
                #print (self.speed)

        self.change_gear(self.gear)

        ## input gear change
        #change gear if necessary (automatic)
        #display status

    def turn_steering_wheel(self, direction_change):
        if self.broken == True:
            print("the car is broken.")
            return
        else:

            if direction_change == "LEFT":
                self.direction -=1
                if self.direction < -1:
                  self.direction = -1

            if direction_change == "RIGHT":
                self.direction +=1
                if self.direction > 1:
                 self.direction = 1




        #check to see if car is in reverse
        #modify direction based on direction change and direction #-1 = left, 0 = straight on, 1 = right
        #display status

    def change_gear(self, selected_gear = FORWARD): #selected_gear is either FORWARD or REVERSE
        if self.broken == True:
            print("the car is broken.")
            return

        else:
            if self.speed <= -1:
                self.vector = "REVERSE"
                print ("the care is in reverse")

            elif 0 > self.speed < 80:
                self.vector = "FORWARD"
                print ("the car is in a forward gear")

        if self.simulation_loaded == True:
            if -11 > self.speed < 0:
                self.gear = 0 # gear reverse/0


            elif 0 > self.speed <= 10:
                self.gear = 1 #gear one
                print("changing up")

            elif 5 > self.speed <= 25:
                self.gear = 2 #gear two
                print("changing up")

            elif 20 > self.speed <= 40:
                self.gear = 3 #gear three
                print("changing up")

            elif 40 > self.speed <= 60:
                print("changing up")
                self.gear = 4 #gear four

            elif 45 > self.speed <= 80:
                self.gear = 5 #gear five
                print("changing up")

        #check to see if car is going forward when reverse is selected and vice versa

        #work out what gear you need to be in based on car’s speed

        #Loop one gear at a time, either changing up or down, to get to required gear

    def display_stats(self):
        #display car stats
        if self.simulation_loaded == True:
            print("Speed ="+","+str((self.speed)) + ", Gear ="+str((self.gear))+", Direction ="+ str((self.direction)))



    def load_simulation(self, filename):
        ##load data from file
        self.commands = list()
        with open('simulation.txt','r') as command_file:
            for line in command_file:
                line = line.rstrip()
                self.commands.append(line)
            #print(self.commands)
        self.simulation_loaded = True

    def run_simulation(self):
        #apple loaded data to car simulator line by line
        self.load_simulation("simulation.txt")
        print("loading Simulation...")
        for item in self.commands:
            self.display_stats()
            #print("change gear")
            self.change_gear()


            if item =="ACCELERATE":
                #print("accelerate")
                self.accelerate()


            if item =="FORWARD":
                #print("forward")
                self.vector = "FORWARD"


            if item =="REVERSE":
                #print("reverse")
                self.vector = "REVERSE"

            if item =="BRAKE":
                #print("brake")
                self.brake()

            if item =="LEFT":

                self.turn_steering_wheel("LEFT")

            if item =="RIGHT":
                self.turn_steering_wheel("RIGHT")





if __name__ == '__main__':
    my_car = Car()
    my_car.load_simulation("simulation.txt")
    my_car.run_simulation()