import Hummingbird
import Infrastructure
import NIOCore

/// The website's request context.
///
/// Extends the core request storage with the negotiated language, defaulting to the default supported language until ``LocalizationMiddleware``
/// resolves it from the request, and with the connected client's address, so ``RateLimitMiddleware`` can key its budgets per client.
public struct WebsiteRequestContext: LocalizedRequestContext, RemoteAddressRequestContext {

    // MARK: Properties

    /// The core request context storage Hummingbird requires.
    public var coreContext: CoreRequestContextStorage
    /// The language identifier negotiated for the request.
    public var language: String
    /// The address of the connected client, captured from the source channel.
    public let remoteAddress: SocketAddress?

    // MARK: Initializers

    /// Creates a request context for the given source.
    /// - Parameter source: the source the context is initialized from.
    public init(
        source: Source,
    ) {
        self.coreContext = .init(source: source)
        self.language = .empty
        self.remoteAddress = source.channel.remoteAddress
    }

}

// MARK: - Constants

private extension String {
    static let empty = ""
}