//
//  NotificationTableViewCell.swift
//  PrivadoVPN
//
//  Created by Zhandos Bolatbekov on 21.01.2021.
//  Copyright © 2021 Privado LLC. All rights reserved.
//

import Foundation
import UIKit

protocol NotificationCellInput {
    func display(viewAdapter: NotificationCellAdapter)
}

class NotificationTableViewCell: UITableViewCell, NotificationCellInput {
    
    private enum Constants {
        
        enum Color {
            static let background = UIColor(rgb: 0x202864)
            static let separator = UIColor(rgb: 0x192147)
            static let bodyTint = UIColor(rgb: 0x28d799)
        }
        
        static let titleFont = UIFont(name: "SFProText-Semibold", size: 20)
        static let dateFont = UIFont(name: "SFProText-Semibold", size: 20)
        
        static let titleTop: CGFloat = 25
        static let titleLeft: CGFloat = 34
        
        static let dateRight: CGFloat = 52
        
        static let bodyLeft: CGFloat = 34
        static let bodyRight: CGFloat = 52
        static let bodyTop: CGFloat = 10
        static let bodyBottom: CGFloat = 20
        
        static let separatorBottom: CGFloat = 2
        static let separatorHeight: CGFloat = 1
    }
    
    private let titleLabel: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.font = Constants.titleFont
        label.textColor = .white
        label.lineBreakMode = .byTruncatingTail
        label.setContentCompressionResistancePriority(.defaultHigh, for: .horizontal)
        label.numberOfLines = 0
        return label
    }()
    private lazy var bodyTextView: UITextView = {
        let textView = UITextView()
        textView.translatesAutoresizingMaskIntoConstraints = false
        textView.isScrollEnabled = false
        textView.dataDetectorTypes = .all
        textView.isEditable = false
        textView.backgroundColor = .clear
        textView.textContainerInset = .zero
        textView.textContainer.lineFragmentPadding = 0
        textView.tintColor = Constants.Color.bodyTint
        textView.delegate = self
        return textView
    }()
    private let dateLabel: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.font = Constants.dateFont
        label.textColor = .white
        label.setContentCompressionResistancePriority(.required, for: .horizontal)
        return label
    }()
    private let separatorView: UIView = {
        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = Constants.Color.separator
        return view
    }()
    
    private var linkAction: NotificationCellLinkAction?
    
    // MARK: - Init
    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        self.selectionStyle = .none
        self.backgroundColor = Constants.Color.background
        self.contentView.isUserInteractionEnabled = false
        self.configureUI()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    // MARK: - Interface
    
    func display(viewAdapter: NotificationCellAdapter) {
        self.titleLabel.text = viewAdapter.title
        self.bodyTextView.attributedText = viewAdapter.body
        self.dateLabel.text = viewAdapter.date
        self.linkAction = viewAdapter.linkAction
    }
    
    // MARK: - Methods
    
    private func configureUI() {
        [self.titleLabel, self.dateLabel, self.bodyTextView, self.separatorView].forEach(self.addSubview(_:))
        
        NSLayoutConstraint.activate([
            self.titleLabel.topAnchor.constraint(equalTo: self.topAnchor, constant: Constants.titleTop),
            self.titleLabel.leftAnchor.constraint(equalTo: self.leftAnchor, constant: Constants.titleLeft),
            self.titleLabel.rightAnchor.constraint(lessThanOrEqualTo: self.dateLabel.leftAnchor, constant: -16),
            
            self.dateLabel.topAnchor.constraint(equalTo: self.titleLabel.topAnchor),
            self.dateLabel.rightAnchor.constraint(equalTo: self.rightAnchor, constant: -Constants.dateRight),
            
            self.separatorView.leftAnchor.constraint(equalTo: self.leftAnchor, constant: Constants.bodyLeft),
            self.separatorView.rightAnchor.constraint(equalTo: self.rightAnchor, constant: -Constants.bodyRight),
            self.separatorView.heightAnchor.constraint(equalToConstant: Constants.separatorHeight),
            self.separatorView.bottomAnchor.constraint(equalTo: self.bottomAnchor, constant: -Constants.separatorBottom),
            
            self.bodyTextView.topAnchor.constraint(greaterThanOrEqualTo: self.dateLabel.bottomAnchor, constant: Constants.bodyTop),
            self.bodyTextView.topAnchor.constraint(equalTo: self.titleLabel.bottomAnchor, constant: Constants.bodyTop),
            self.bodyTextView.leftAnchor.constraint(equalTo: self.leftAnchor, constant: Constants.bodyLeft),
            self.bodyTextView.rightAnchor.constraint(equalTo: self.rightAnchor, constant: -Constants.bodyRight),
            self.bodyTextView.bottomAnchor.constraint(equalTo: self.separatorView.topAnchor, constant: -Constants.bodyBottom)
        ])
    }
}

extension NotificationTableViewCell: UITextViewDelegate {
    
    func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
        self.linkAction?(URL)
        return false
    }
}