import Foundation

/// Opens a URL with the default application.
///
/// May present an application picker if multiple applications are registered
/// for the given URL protocol.
@MainActor
public struct OpenURLAction {
    let action: (URL) -> Void

    init<Backend: BaseAppBackend>(backend: Backend) {
        action = { url in
            guard let backend = backend as? any BackendFeatures.ExternalURLs else {
                logger.warnOnce(Logger.Message(stringLiteral: "\(type(of: backend)) doesn't support opening URLs"))
                return
            }

            do {
                try backend.openExternalURL(url)
            } catch {
                logger.warning(
                    "failed to open external url",
                    metadata: [
                        "url": "\(url)",
                        "error": "\(error)",
                    ]
                )
            }
        }
    }

    /// Opens a URL with the default application.
    ///
    /// - Parameter url: The URL to open.
    public func callAsFunction(_ url: URL) {
        action(url)
    }
}