//
//  RoundedTextField.swift
//  Privado
//
//  Created by Juraldinio on 2/17/20.
//  Copyright © 2020 Privado LLC. All rights reserved.
//

import Foundation
import UIKit

final class RoundedTextField: UITextField {

    // MARK: - Customize
    struct Customize {
        let textColor: UIColor
        let backgroundColor: UIColor
        let cornerRadius: CGFloat
        let errorBorderHeight: CGFloat
        let errorBorderColor: UIColor
        let autoCapitalization: UITextAutocapitalizationType
        let attrPlaceholder: [NSAttributedString.Key: Any]
        let borderColor = UIColor(red: 45, green: 51, blue: 82)
        let activeBorderColor = UIColor(red: 42, green: 216, blue: 153)
    }
    
    private static let LoginAttrPlaceholder = [NSAttributedString.Key.foregroundColor: UIColor(red: 173, green: 179, blue: 210), NSAttributedString.Key.font: UIFont(name: "SFProText-Regular", size: 21)]
    
    static let LoginCustomize = Customize(textColor: UIColor(red: 173, green: 179, blue: 210),
                                                     backgroundColor: UIColor(rgb: 0x2D3352),
                                                     cornerRadius: 24,
                                                     errorBorderHeight: 3,
                                                     errorBorderColor: UIColor(red: 228, green: 59, blue: 105),
                                                     autoCapitalization: .none,
                                                     attrPlaceholder: RoundedTextField.LoginAttrPlaceholder)
    
    private var bottomLine = UIView()
    
    private var borderWidth: CGFloat?
    private var borderColor: UIColor?
    private var activeBorderColor: UIColor?
    private var borderErrorColor: UIColor?
    
    // MARK: - Init
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        self.setup()
    }
    
    convenience init() {
        self.init(frame: .zero)
        
        self.setup()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    // MARK: -
    
    private func setup() {
        self.translatesAutoresizingMaskIntoConstraints = false
    }
    
    func customize(with customize: Customize, placeholder: String) {

        self.textColor = customize.textColor
        self.font = UIFont(name: "SFProText-Regular", size: 21)
        
        self.bottomLine.translatesAutoresizingMaskIntoConstraints = false
        self.addSubview(self.bottomLine)
        self.bottomLine.backgroundColor = customize.borderColor
        NSLayoutConstraint.activate([
            self.bottomLine.trailingAnchor.constraint(equalTo: self.trailingAnchor),
            self.bottomLine.leadingAnchor.constraint(equalTo: self.leadingAnchor),
            self.bottomLine.heightAnchor.constraint(equalToConstant: customize.errorBorderHeight),
            self.bottomLine.bottomAnchor.constraint(equalTo: self.bottomAnchor, constant: -customize.errorBorderHeight)
            ])

        
        self.autocapitalizationType = customize.autoCapitalization
        
        self.borderWidth = customize.errorBorderHeight
        self.borderErrorColor = customize.errorBorderColor
        self.borderColor = customize.borderColor
        self.activeBorderColor = customize.activeBorderColor
        
        self.attributedPlaceholder = NSAttributedString(string: placeholder, attributes: customize.attrPlaceholder)
        
        self.addTarget(self, action: #selector(textFieldStateChange(object:)), for: .editingDidBegin)
        self.addTarget(self, action: #selector(textFieldStateChange(object:)), for: .editingDidEnd)
    }
    
    @objc
    func textFieldStateChange(object: UITextField) {
        guard let activeBorderColor = self.activeBorderColor, let borderColor = self.borderColor else {
            return
        }
        self.bottomLine.backgroundColor = self.isEditing ? activeBorderColor : borderColor
    }
    
    override func textRect(forBounds bounds: CGRect) -> CGRect {
        let rect = super.textRect(forBounds: bounds)
        return rect.insetBy(dx: 0, dy: 0)
    }
    
    override func editingRect(forBounds bounds: CGRect) -> CGRect {
        let rect = super.editingRect(forBounds: bounds)
        return rect.insetBy(dx: 0, dy: 0)
    }
    
    func highlight(isHighlighted: Bool) {
        self.bottomLine.backgroundColor = isHighlighted ? self.borderErrorColor : self.borderColor
    }
}