import SwiftUI

struct AvatarView: View {
    let url: URL?
    let nick: String?
    var size: CGFloat = 40

    var body: some View {
        Group {
            if let url {
                AsyncImage(url: url) { phase in
                    switch phase {
                    case .success(let image):
                        image.resizable().scaledToFill()
                    default:
                        placeholder
                    }
                }
            } else {
                placeholder
            }
        }
        .frame(width: size, height: size)
        .clipShape(Circle())
    }

    private var placeholder: some View {
        Circle()
            .fill(Color.accentColor.opacity(0.15))
            .overlay(
                Text(initial)
                    .font(.system(size: size * 0.4, weight: .semibold))
                    .foregroundStyle(Color.accentColor)
            )
    }

    private var initial: String {
        nick?.prefix(1).uppercased() ?? "?"
    }
}