//
//  Extension.swift
//  LMS
//
//  Created by Suraj Kumar Mandal on 17/08/22.
//

import Foundation
import UIKit

extension UIApplication {
    class func isFirstLaunch() -> Bool {
        if !UserDefaults.standard.bool(forKey: "hasBeenLaunchedBeforeFlag") {
            UserDefaults.standard.set(true, forKey: "hasBeenLaunchedBeforeFlag")
            UserDefaults.standard.synchronize()
            return true
        }
        return false
    }
}

extension UIWindow {
    static var key: UIWindow? {
        if #available(iOS 13, *) {
            return UIApplication.shared.windows.first { $0.isKeyWindow }
        } else {
            return UIApplication.shared.keyWindow
        }
    }
}

extension UIApplication {
    static var release: String {
        return Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as! String? ?? "x.x"
    }
    static var build: String {
        return Bundle.main.object(forInfoDictionaryKey: "CFBundleVersion") as! String? ?? "x"
    }
    static var version: String {
        return "\(release).\(build)"
    }
}

extension UIView {
    func dropShadow(scale: Bool = true) {
        layer.masksToBounds = false
        layer.shadowColor = UIColor.black.cgColor
        layer.shadowOpacity = 0.2
        layer.shadowOffset = .zero
        layer.shadowRadius = 1
        layer.shouldRasterize = true
        layer.rasterizationScale = scale ? UIScreen.main.scale : 1
    }
    
    func addShadow() {
        self.layer.shadowColor = UIColor.gray.cgColor
        self.layer.shadowOffset = CGSize(width: 1, height: 1)
        self.layer.shadowOpacity = 1
    }
}

extension UIScrollView {
    func scrollToTop() {
        let desiredOffset = CGPoint(x: 0, y: -contentInset.top)
        setContentOffset(desiredOffset, animated: true)
    }
}

extension UIScrollView {
    func scrollViewToTop( _ someView:UIView){
        let targetViewTop = someView.frame.origin.y
        let viewToTop = targetViewTop - self.contentInset.top
        self.setContentOffset(CGPoint(x: 0, y: viewToTop), animated: true)
    }
}

extension Bundle {
    // Name of the app - title under the icon.
    var displayName: String? {
        return object(forInfoDictionaryKey: "CFBundleDisplayName") as? String ??
        object(forInfoDictionaryKey: "CFBundleName") as? String
    }
}

extension UIDatePicker {
    func setMonthYearPicker() {
        self.datePickerMode = .date
        let currentDate = Date()
        self.maximumDate = currentDate
        let calendar = Calendar(identifier: .gregorian)
        var components = calendar.dateComponents([.year, .month], from: currentDate)
        components.calendar = calendar
        self.date = components.date!
    }
}

extension Encodable {
    func toDictionary() -> [String: Any]? {
        guard let data = try? JSONEncoder().encode(self) else {
            return nil
        }
        
        return (try? JSONSerialization.jsonObject(with: data, options: .allowFragments)) as? [String: Any]
    }
}

extension UIViewController {
    func dismissAllAlerts() {
        if let rootViewController = UIApplication.shared.windows.first?.rootViewController {
            var topViewController = rootViewController
            while let presentedViewController = topViewController.presentedViewController {
                if let alert = presentedViewController as? UIAlertController {
                    alert.dismiss(animated: false, completion: nil)
                }
                topViewController = presentedViewController
            }
        }
    }
}