//
//  CCCPViewTokenSelector.swift
//  List
//
//  Created by Saveliy Stavitsky on 7/20/20.
//  Copyright © 2020 Igor Danich. All rights reserved.
//

import UIKit

protocol CCCPViewTokenSelectorDelegate: UIViewController {
    func stateChanged()
}

class CCCPViewTokenSelector: CommonViewCustom {

    @IBOutlet private var backgroundView: UIView!

    @IBOutlet var countSectionStackView: UIStackView!
    @IBOutlet var titleLabel: UILabel!
    @IBOutlet private var removeButton: UIButton!
    @IBOutlet private var countTextField: CommonTextField1!
    @IBOutlet private var addButton: UIButton!

    @IBOutlet var currencyPickerSectionStackView: UIStackView!
    @IBOutlet var currencySectionImageView: UIImageView!
    @IBOutlet var secondTitleLabel: UILabel!
    @IBOutlet var currencyButton: UIButton!
    @IBOutlet var balanceStackView: UIStackView!
    @IBOutlet private var currencyBalance: UILabel!

    @IBOutlet var notesSectionStackView: UIStackView!
    @IBOutlet var notesTitleLabel: UILabel!
    @IBOutlet var notesSectionSubStackView: UIStackView!

    weak var parentViewController: CCCPViewTokenSelectorDelegate?

    var coef: Decimal?
    var tokens: [Network.Model.Token] = [] { didSet { index = -1 } }
    var index = -1 {
        didSet {
            parentViewController?.stateChanged()
            countTextField.text = "\(count)"
            setupButtonsApearance()
        }
    }
    var selectedToken: Network.Model.Token? { index >= 0  && index < tokens.count ? tokens[index] : nil }
    var maxTokens: Int {
        guard let coef = coef else {
            return selectedToken?.isCashContract ?? false
                ? NSDecimalNumber(decimal: selectedToken?.amount ?? 0.0).intValue
                : 0
        }
        return selectedToken?.isListContract ?? false
            ? NSDecimalNumber(decimal: (selectedToken?.amount ?? 0) / coef).intValue
            : NSDecimalNumber(decimal: selectedToken?.amount ?? 0).intValue
    }

//    private(set)
    var count = 0 {
        didSet {
            parentViewController?.stateChanged()
            countTextField.text = "\(count)"
            setupButtonsApearance()
        }
    }

    override func setup() {
        super.setup()
        tokens = []
        backgroundView.layer.shadowColor = Asset.lightGray.color.cgColor
    }

    override func layoutSubviews() {
        super.layoutIfNeeded()

        backgroundView.layer.shadowPath = UIBezierPath(roundedRect: backgroundView.bounds,
                                                       cornerRadius: 20.0).cgPath
    }

    @IBAction private func removeCount(_ sender: Any) {
        if count > 0 { count -= 1 }
    }

    @IBAction private func addCount(_ sender: Any) {
        if count < maxTokens { count += 1 }
    }

    @IBAction private func currencyPressed(_ sender: Any) {
        let currencyPicker = CommonViewPopUpSelection(
            list: tokens.map({ $0.amount > 0 ? "\($0)" : $0.symbol }),
            selectedIndex: index,
            selection: { [weak self] in
                self?.index = $0
                self?.parentViewController?.dismiss(animated: true, completion: nil)
            }
        )
//        let viewController = CommonViewControllerPopUp(title: L10n.Cccp.chooseCurrency,
//                                                       view: currencyPicker,
//                                                       completion: nil)
//        parentViewController?.present(viewController, animated: true, completion: nil)
    }

    private func setupButtonsApearance() {
        addButton.tintColor = count == maxTokens ? Asset.lightGray.color : Asset.dark.color
        addButton.isEnabled = count != maxTokens

        removeButton.tintColor = count == 0 ? Asset.lightGray.color : Asset.dark.color
        removeButton.isEnabled = count != 0

        if let token = selectedToken {
            balanceStackView.isHidden = !(token.amount > 0)
            currencyButton.setTitle(token.symbol, for: .normal)
            currencyBalance.text = L10n.Wallet.Send.balance(token.description)
        } else {
            currencyButton.setTitle("--", for: .normal)
            currencyBalance.text = L10n.Wallet.Send.balance("")
        }
    }
}