import SwiftUI
import PhotosUI

struct MultiPHPickerView: UIViewControllerRepresentable {
    
    @Environment(\.presentationMode) private var presentationMode
    
    @Binding var itemProviders: [NSItemProvider]
    
    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }
    
    func makeUIViewController(context: Context) -> PHPickerViewController {
     
        var configuration = PHPickerConfiguration()
        configuration.filter = .images
        configuration.selectionLimit = 0
        
        let controller = PHPickerViewController(configuration: configuration)
        controller.delegate = context.coordinator
        return controller
        
    }
    
    func updateUIViewController( _ uiViewController: PHPickerViewController, context: Context) {}
    
    
    class Coordinator: NSObject, PHPickerViewControllerDelegate {
        
        @Environment(\.presentationMode)  private var presentationMode
        
        var parent: MultiPHPickerView
        
        init( _ parent: MultiPHPickerView ) {
            self.parent = parent
        }
        
        func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
            
            picker.dismiss( animated: true )
            
            self.parent.itemProviders = results.map(\.itemProvider)
        }
    }
    
}