//
//  TestViewController.swift
//  VDSSample
//
//  Created by Matt Bruce on 8/12/22.
//

import Foundation
import UIKit
import Combine
import VDS

struct User {
    var firstName: String
    var lastName: String
    
    init(firstName: String, lastName: String) {
        self.firstName = firstName
        self.lastName = lastName
    }
}

class TextFieldBindingCell: UIControl {
    
    private let firstNameTextField = TextField()
    private let lastNameTextField = TextField()
    private var subscriptions = Set<AnyCancellable>()

    var user: User {
        User(firstName: firstNameTextField.text ?? "", lastName: lastNameTextField.text ?? "" )
    }
    
    init(user: User) {
        super.init(frame: .zero)
        firstNameTextField.text = user.firstName
        lastNameTextField.text = user.lastName

        translatesAutoresizingMaskIntoConstraints = false
        firstNameTextField.translatesAutoresizingMaskIntoConstraints = false
        lastNameTextField.translatesAutoresizingMaskIntoConstraints = false
        
        addSubview(firstNameTextField)
        addSubview(lastNameTextField)
        
        firstNameTextField.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
        firstNameTextField.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
        firstNameTextField.topAnchor.constraint(equalTo: topAnchor).isActive = true
        firstNameTextField.heightAnchor.constraint(equalToConstant: 50).isActive = true
        
        lastNameTextField.topAnchor.constraint(equalTo: firstNameTextField.bottomAnchor, constant: 20).isActive = true
        lastNameTextField.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
        lastNameTextField.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
        lastNameTextField.heightAnchor.constraint(equalToConstant: 50).isActive = true
        lastNameTextField.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
        
        firstNameTextField
            .textPublisher
            .sink { [weak self] _ in
                self?.sendActions(for: .valueChanged)
            }.store(in: &subscriptions)

        lastNameTextField
            .textPublisher
            .sink { [weak self] _ in
                self?.sendActions(for: .valueChanged)
            }.store(in: &subscriptions)

    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

@objcMembers class TestViewController: UIViewController, Initable {
    deinit {
        print("\(Self.self) deinit")
    }
    
    var user = User(firstName: "Joe", lastName: "User") {
        didSet {
            print("User oldValue: \(oldValue)")
            print("User newValue: \(user)")
        }
    }
    
    private var subscriptions = Set<AnyCancellable>()
    
    required init() {
        super.init(nibName: nil, bundle: nil)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .white
        
        let nameTextField = TextFieldBindingCell(user: user)
        let button = UIButton()
        
        button.translatesAutoresizingMaskIntoConstraints = false
        
        view.addSubview(nameTextField)
        view.addSubview(button)
        nameTextField.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 20).isActive = true
        nameTextField.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -20).isActive = true
        nameTextField.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 20).isActive = true
        button.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 20).isActive = true
        button.topAnchor.constraint(equalTo: nameTextField.bottomAnchor, constant: 20).isActive = true
        button.heightAnchor.constraint(equalToConstant: 50).isActive = true
        button.widthAnchor.constraint(equalToConstant: 100).isActive = true
        button.backgroundColor = .blue
        button.setTitle("Print", for: .normal)
        
        //publishers
        nameTextField
            .publisher(for: .valueChanged)
            .sink(receiveValue: { [weak self] control in
                guard let self else { return }
                self.user = control.user
            })
            .store(in: &subscriptions)
        
        button
            .tapPublisher
            .sink { [weak self] _ in
                if let user = self?.user {
                    print("\(user.firstName) \(user.lastName)")
                }
            }.store(in: &subscriptions)
    }
}

class TextField: UITextField {
    var textPadding = UIEdgeInsets(
        top: 10,
        left: 20,
        bottom: 10,
        right: 20
    )
    
    override func textRect(forBounds bounds: CGRect) -> CGRect {
        layer.borderColor = UIColor.black.cgColor
        layer.borderWidth = 1
        let rect = super.textRect(forBounds: bounds)
        return rect.inset(by: textPadding)
    }
    
    override func editingRect(forBounds bounds: CGRect) -> CGRect {
        layer.borderColor = UIColor.black.cgColor
        layer.borderWidth = 1
        let rect = super.editingRect(forBounds: bounds)
        return rect.inset(by: textPadding)
    }
}