//
//  Label.swift


import Foundation
import UIKit
import MBProgressHUD

extension UILabel{
    
    func setLineSpacing(lineSpacing: CGFloat = 0.0, lineHeightMultiple: CGFloat = 0.0) {
        
        guard let labelText = self.text else { return }
        
        let paragraphStyle = NSMutableParagraphStyle()
        paragraphStyle.lineSpacing = lineSpacing
        paragraphStyle.lineHeightMultiple = lineHeightMultiple
        
        let attributedString:NSMutableAttributedString
        if let labelattributedText = self.attributedText {
            attributedString = NSMutableAttributedString(attributedString: labelattributedText)
        } else {
            attributedString = NSMutableAttributedString(string: labelText)
        }
        
        // Line spacing attribute
        attributedString.addAttribute(NSAttributedString.Key.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attributedString.length))
        
        self.attributedText = attributedString
    }
    
    func indexOfAttributedTextCharacterAtPoint(point: CGPoint) -> Int {
        assert(self.attributedText != nil, "This method is developed for attributed string")
        let textStorage = NSTextStorage(attributedString: self.attributedText!)
        let layoutManager = NSLayoutManager()
        textStorage.addLayoutManager(layoutManager)
        let textContainer = NSTextContainer(size: self.frame.size)
        textContainer.lineFragmentPadding = 0
        textContainer.maximumNumberOfLines = self.numberOfLines
        textContainer.lineBreakMode = self.lineBreakMode
        layoutManager.addTextContainer(textContainer)
        
        let index = layoutManager.characterIndex(for: point, in: textContainer, fractionOfDistanceBetweenInsertionPoints: nil)
        return index
    }
    
}