//
//  AvatarImageView.swift
//  ComposeUI
//
//  Created by Shadowfacts on 3/4/23.
//

import SwiftUI

struct AvatarImageView: View {
    let url: URL?
    let size: CGFloat
    @State private var image: UIImage?
    @EnvironmentObject private var controller: ComposeController
    
    var body: some View {
        imageView
            .resizable()
            .frame(width: size, height: size)
            .cornerRadius(controller.config.avatarStyle.cornerRadiusFraction * size)
            .task {
                if let url {
                    image = await controller.fetchAvatar(url)
                }
            }
            // tell swiftui that this view has changed (and therefore the task needs to re-run) when the url changes
            .id(url)
        
    }
    
    private var imageView: Image {
        if let image {
            return Image(uiImage: image)
        } else {
            return placeholder
        }
    }
    
    private var placeholder: Image {
        Image(systemName: controller.config.avatarStyle == .roundRect ? "person.crop.square" : "person.crop.circle")
    }
}