import UIKit
import Eureka
import SnapKit

class EditProfileAboutMeCell: Cell<String>, CellType, UITextViewDelegate {

    private let titleLabel = UILabel()
    private let valueTextView = UITextView()
    private let bottomSeparator = UIView()

    override func setup() {
        super.setup()
        addSubview(titleLabel)
        titleLabel.textColor = UIColor.gray
        titleLabel.snp.makeConstraints { (make) in
            make.top.equalToSuperview().offset(12)
            make.left.equalToSuperview().offset(15)
            make.width.equalToSuperview().multipliedBy(0.3)
        }
        addSubview(bottomSeparator)
        bottomSeparator.backgroundColor = UIColor.gray
        bottomSeparator.snp.makeConstraints { (make) in
            make.bottom.right.equalToSuperview()
            make.left.equalTo(titleLabel.snp.right).offset(8)
            make.height.equalTo(1)
        }
        addSubview(valueTextView)
        valueTextView.textColor = UIColor.black
        valueTextView.snp.makeConstraints { (make) in
            make.right.equalToSuperview()
            make.bottom.equalTo(bottomSeparator.snp.top)
            make.top.equalToSuperview()
            make.left.equalTo(titleLabel.snp.right).offset(8)
        }

        selectionStyle = .none
        valueTextView.delegate = self
    }

    override func update() {
        super.update()

        guard let row = row as? EditProfileAboutMeRow else { return }
        row.title = nil

        titleLabel.text = row.rowTitle
        valueTextView.text = row.value
    }

    // MARK: UITextViewDelegate
    func textView(_ textView: UITextView,
                  shouldChangeTextIn range: NSRange,
                  replacementText text: String) -> Bool {
        guard let currentText = textView.text, let row = row as? EditProfileAboutMeRow else { return true }
        let newLength = currentText.count + text.count - range.length
        return newLength <= row.maximumLength
    }

    // MARK: Text field helper
    @objc func textViewDidChange(_ textView: UITextView) {
        row.value = textView.text
    }
}

final class EditProfileAboutMeRow: Row<EditProfileAboutMeCell>, RowType {

    var maximumLength: Int = 150
    var placeholder: String?
    var rowTitle: String?

    required init(tag: String?) {
        super.init(tag: tag)
        displayValueFor = nil
    }

    init() {
        super.init(tag: nil)
    }

}