import Foundation

// structure is a value type

struct Person {
    let name: String
    let age: Int
}

let foo = Person(name: "foo", age: 20)

foo.name
foo.age

struct CommodorComputer {
    let name: String
    let manufacturer: String = "Commodor"
    
    // constructor
//    init(name: String) {
//        self.name = name
//        self.manufacturer = "Commodor"
//    }
}


let c64 = CommodorComputer(name: "Test")

c64.manufacturer


// Compute property
struct Person2 {
    let firstName: String
    let lastName: String
//    let fullName: String
    
//    init(firstName: String, lastName: String) {
//        self.firstName = firstName
//        self.lastName = lastName
//        self.fullName = "\(firstName) \(lastName)"
//    }
    
    var fullName: String {
        "\(firstName) \(lastName)"
    }
}

let fooBar = Person2 (firstName: "Gary", lastName: "Gan")

fooBar.fullName

struct Car {
    var currentSpeed: Int
    
    mutating func drive(speed: Int) {
        "Driving..."
        currentSpeed = speed
    }
}

let immutableCar = Car(currentSpeed: 10)
// !immutableCar.drive(speed: 20)

var mutableCar = Car(currentSpeed: 10)
mutableCar.drive(speed: 30)
mutableCar.currentSpeed

let copy = mutableCar
mutableCar.drive(speed: 40)
mutableCar.currentSpeed
copy.currentSpeed

struct LivingThing {
    init() {
        "I'm living"
    }
}

//struct Animal: LivingThing {
//
//}

struct Bike {
    let manufacturer: String
    let currentSpeed: Int
    
    func copy(currentSpeed: Int) -> Bike {
        Bike (manufacturer: self.manufacturer, currentSpeed: currentSpeed)
    }
}

let bike1 = Bike(manufacturer: "HD", currentSpeed: 20)

var bike2 = bike1.copy(currentSpeed: 40)
bike1.currentSpeed
bike2.currentSpeed