import Foundation
import SwiftUI
import UIKit

class GoalShareService {
    static let shared = GoalShareService()

    private init() {}

    @MainActor
    func shareGoal(
        name: String,
        progress: Double,
        currentValue: Decimal,
        targetValue: Decimal
    ) {
        guard let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene,
              let viewController = windowScene.windows.first?.rootViewController else {
            return
        }

        let card = GoalShareCardView(
            name: name,
            progress: progress,
            currentValue: currentValue,
            targetValue: targetValue
        )

        if #available(iOS 16.0, *) {
            let renderer = ImageRenderer(content: card)
            let scale = viewController.view.window?.windowScene?.screen.scale
                ?? viewController.traitCollection.displayScale
            renderer.scale = scale
            if let image = renderer.uiImage {
                let activityVC = UIActivityViewController(activityItems: [image], applicationActivities: nil)
                viewController.present(activityVC, animated: true)
            }
        } else {
            let text = "I am \(Int(progress * 100))% towards \(name) on Portfolio Journal!"
            let activityVC = UIActivityViewController(activityItems: [text], applicationActivities: nil)
            viewController.present(activityVC, animated: true)
        }
    }
}