//
//  Macros.swift
//  Passepartout-iOS
//
//  Created by Davide De Rosa on 6/16/18.
//  Copyright (c) 2019 Davide De Rosa. All rights reserved.
//
//  https://github.com/passepartoutvpn
//
//  This file is part of Passepartout.
//
//  Passepartout is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  Passepartout is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with Passepartout.  If not, see <http://www.gnu.org/licenses/>.
//

import UIKit

extension UIView {
    static func get<T: UIView>() -> T {
        let name = String(describing: T.self)
        let nib = UINib(nibName: name, bundle: nil)
        let objects = nib.instantiate(withOwner: nil)
        for o in objects {
            if let view = o as? T {
                return view
            }
        }
        fatalError()
    }
}

extension UITableView {
    func scrollToRowAsync(at indexPath: IndexPath) {
        DispatchQueue.main.async { [weak self] in
            self?.scrollToRow(at: indexPath, at: .middle, animated: false)
        }
    }
    
    func selectRowAsync(at indexPath: IndexPath) {
        DispatchQueue.main.async { [weak self] in
            self?.selectRow(at: indexPath, animated: false, scrollPosition: .middle)
        }
    }
}

extension UIColor {
    convenience init(rgb: UInt32, alpha: CGFloat) {
        let r = CGFloat((rgb & 0xff0000) >> 16) / 255.0
        let g = CGFloat((rgb & 0xff00) >> 8) / 255.0
        let b = CGFloat(rgb & 0xff) / 255.0
        self.init(red: r, green: g, blue: b, alpha: alpha)
    }
}

extension UIViewController {
    func presentPurchaseScreen(forProduct product: Product) {
        let nav = StoryboardScene.Purchase.initialScene.instantiate()
        let vc = nav.topViewController as? PurchaseViewController
        vc?.feature = product

        // enforce pre iOS 13 behavior
        nav.modalPresentationStyle = .fullScreen

        present(nav, animated: true, completion: nil)
    }
}

func delay(_ block: @escaping () -> Void) {
    DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(500)) {
        block()
    }
}