//
//  NSAttributedString.swift
//  VDS
//
//  Created by Matt Bruce on 5/30/23.
//

import Foundation
import UIKit

extension NSAttributedString {
    public static func spacer(for width: CGFloat) -> NSAttributedString {
        let spacerImage = UIImage()
        let spacerAttachment = NSTextAttachment()
        spacerAttachment.bounds = .init(x: 0, y: 0, width: width, height: 1)
        spacerAttachment.image = spacerImage
        return NSAttributedString(attachment: spacerAttachment)
    }
}

extension NSMutableAttributedString {
    public static func mutableText(for text: String, textStyle: TextStyle, textColor: UIColor, alignment: NSTextAlignment = .left, lineBreakMode: NSLineBreakMode) -> NSMutableAttributedString {
        let startingAttributes = [NSAttributedString.Key.font: textStyle.font, NSAttributedString.Key.foregroundColor: textColor]
        let attributedString = NSMutableAttributedString(string: text, attributes: startingAttributes)

        //get the range
        let entireRange = NSRange(location: 0, length: attributedString.length)
        
        //set letterSpacing
        if textStyle.letterSpacing > 0.0 {
            attributedString.addAttribute(.kern, value: textStyle.letterSpacing, range: entireRange)
        }
        
        let paragraph = NSMutableParagraphStyle()
        paragraph.alignment = alignment
        paragraph.lineBreakMode = lineBreakMode

        //set lineHeight
        if textStyle.lineHeight > 0.0 {
            let lineHeight = textStyle.lineHeight
            paragraph.maximumLineHeight = lineHeight
            paragraph.minimumLineHeight = lineHeight
        }
        
        attributedString.addAttribute( .paragraphStyle, value: paragraph, range: entireRange)
        
        return attributedString
    }
}