class_inheritence_challenge.rb

class Vehicle 
    def initialize(make, model, tank)
        @make = make
        @model = model
        @fuel = 0 
        @tank = tank     
    end 

    def refuel
        input = nil
        while @fuel < @tank && input != "y"
            puts "how much fuel do you want to put into your car? (in litres)"
            print "> "
            litres = gets.chomp.to_i
            if (@fuel + litres) > @tank 
                puts "Sorry your tank would overflow, please put in less fuel"
            else 
                @fuel += litres
                puts "###"
                puts "You now have #{@fuel} litres of fuel in your tank. You can still put in #{@tank - @fuel} litres more."
                puts "###"
                puts "Would you like to exit (y/n)"
                input = gets.chomp 
            end 
        end 
    end 

    def fuel_level
        "You have #{@fuel} litres of fuel in the tank"  
    end 
end 

class Car < Vehicle
    def initialize(make, model, tank, color)
        super(make, model, tank)
        @power_steering = true
        @color = color
    end

    def wind_up_windows 
        return "windows going up"
    end
end 

class Motorbike < Vehicle
    def wheelie
        return "woowww wheelie"
    end 
end 

# instances 
civic = Car.new("Honda", "Civic", 50, "red")
civic.refuel
p civic.fuel_level

civic.refuel(10)
civic.refuel(1)
p civic

p civic.wind_up_windows
low_rider = Motorbike.new("Harley Davidson", "Low Rider")
p low_rider
p low_rider.wheelie
low_rider.refuel(10)
p low_rider
p low_rider.fuel_level

# excellent challenge for seeing why we need inheritance in classes sometimes 
# remember to think of inheritance as something that only is the thing above it 
# a motorbike can inherit from vehicle because a motorcycle is a vehicle