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import UIKit

class ContactDetailController: UITableViewController {

    var contact: Contact?////checking if we have a contact associated with the controller

    //outlets

    @IBOutlet weak var profileView: UIImageView!
    @IBOutlet weak var phoneNumberLabel: UILabel!
    @IBOutlet weak var emailLabel: UILabel!
    @IBOutlet weak var nameLabel: UILabel!
    @IBOutlet weak var StreetAddressLabel: UILabel!
    @IBOutlet weak var cityLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()
configureViews()

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

//Configure View method to set up labels .Called when the view loads
    func configureViews(){
        //contact property is an optional so we unwrap it
        guard let contact = contact else {return}
        phoneNumberLabel.text = contact.phone
        emailLabel.text = contact.email
        StreetAddressLabel.text = contact.street
        cityLabel.text = contact.city
        profileView.image = contact.image
        nameLabel.text = "\(contact.firstName) \(contact.lastName)"//string interpolation to display first name and last name 

    }

import UIKit

class ContactListController: UITableViewController {//view controller for the master view


    var contacts = ContactsSource.contacts

    override func viewDidLoad() {
        super.viewDidLoad()

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {//a section is a way to group data
        //asks data source to returna a number

        return 1// to specify that we have one section.We are goin to treat our data as a single long list of contacts so we will return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

        return contacts.count//we ant as many rows as contacts
    }
    //each row displays data in a cell 


    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {//this metod is called for each row and provides a value for the indexpath argument which indicates which section we are in and which row we are in
        let cell = tableView.dequeueReusableCell(withIdentifier: "ContactCell", for: indexPath)//ask the method to create a reusable cell from a prototype.
        let contact = contacts[indexPath.row]//display contacts at a particular index at a row that has the same index path
        cell.textLabel?.text = contact.firstName//assigning the contact first name to text label
        cell.imageView?.image = contact.image//displaying images
        cell.detailTextLabel?.text = contact.lastName
        return cell
    }


    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {


        //the code here is executed when we go from master to detail
        if segue.identifier == "showContact"{
            //the next step is to figure out which row was tapped
            if let indexPath = tableView.indexPathForSelectedRow{
                let contact = contacts[indexPath.row]
                //the dest vc is the nav controller the detail controller is embedded in

                guard let navigationController = segue.destination as?UINavigationController,let contactDetailController = navigationController.topViewController as? ContactDetailController

                    else{return}
                //getting a reference to the destination and casting it to the right type
            contactDetailController.contact = contact//assigniung this instance of the contact on the stored property on the contact detail controller
            }
        }
    }