import CoreImage
import UIKit
import Foundation
import SwiftUICore

public class QR{
	
	
	 
		static func imageToBase64(_ image: UIImage) -> String {
			if let imageData = image.jpegData(compressionQuality: 1.0) {
			    // 使用imageData进行你的操作
				let base64String = imageData.base64EncodedString(options: [])
						return base64String
				
			}
			return "";
			}
	
		static func createQrCode(_ data:String,_ size:Int)->String{
			// 使用示例
			var b:CGFloat=CGFloat(size);
			guard let qrCodeImage = QR.generateQRCode(with:data,  qrSize: b)
			else{
				return "";
			}
			 let q = QR.imageToBase64(qrCodeImage)
			return q
		}
	
	
	static func createQrCodeWithLogo(_ data:String,_ size:Int,_ logo: String,_ logoW:Int,_ logoH:Int)->String{
		// 使用示例
		var b:CGFloat=CGFloat(size);
		var w:CGFloat=CGFloat(logoW);
		var h:CGFloat=CGFloat(logoH);
		var logoSize:CGSize=CGSize(width: w, height: h)
		guard let qrCodeImage = QR.generateQRCode(with:data,logoName:logo, logoSize:logoSize, qrSize: b)
		else{
			return "";
		}
		 let q = QR.imageToBase64(qrCodeImage)
		return q
	}
	// 生成二维码图像，并可选地添加logo
	     static func generateQRCode(with content: String, logoName: String? = nil, logoSize: CGSize = CGSize(width: 50, height: 50), qrSize: CGFloat = 200) -> UIImage? {
	              // 1. 生成二维码
	              guard let qrFilter = CIFilter(name: "CIQRCodeGenerator") else { return nil }
	              let data = content.data(using: .utf8)
	              qrFilter.setValue(data, forKey: "inputMessage")
	              qrFilter.setValue("H", forKey: "inputCorrectionLevel") // 高纠错级别
	              guard let qrImage = qrFilter.outputImage else { return nil }
	              
	              // 2. 调整二维码尺寸
	              let scaleTransform = CGAffineTransform(scaleX: qrSize / qrImage.extent.size.width, y: qrSize / qrImage.extent.size.height)
	              let scaledQrImage = qrImage.transformed(by: scaleTransform)
	              
	              // 3. 创建UIImage对象
	              guard let qrUIImage:UIImage? = UIImage(ciImage: scaledQrImage) else { return nil }
	              
	              
	              // if let image: UIImage? = someFunctionThatReturnsUIImage() {
	              //     // 这里image已经被解包，并且是非空的
	              // } else {
	              //     // 处理image为nil的情况
	              // }
	              // 4. 添加logo（如果有）
	              if let logoName = logoName, let logoImage = UIImage(named: logoName) {
	                  let logoFrame = CGRect(x: (qrUIImage!.size.width - logoSize.width) / 2,
	                                         y: (qrUIImage!.size.height - logoSize.height) / 2,
	                                         width: logoSize.width,
	                                         height: logoSize.height)
	                  
	                  UIGraphicsBeginImageContextWithOptions(qrUIImage!.size, false, 0.0)
	                  qrUIImage?.draw(in: CGRect(origin: .zero, size: qrUIImage!.size))
	                  logoImage.draw(in: logoFrame)
	                  let finalImage = UIGraphicsGetImageFromCurrentImageContext()
	                  UIGraphicsEndImageContext()
	                  
	                  return finalImage
	              }
	              
	              // 如果没有logo，直接返回二维码图像
	              return qrUIImage
	          }
	      
		  
		  
		  
	
	
}