class AuthManager {
    static let shared = AuthManager()

    let supabaseClient = SupabaseClient(
        supabaseURL: URL(string: Environment.supabaseURL)!,
        supabaseKey: Environment.supabaseAnonKey
    )

    func addUserFullName(_ fullName: String) async throws {
        guard !fullName.isEmpty else { return }
        let attributes = UserAttributes(data: ["fullName": AnyJSON.string(fullName)])
        try await supabaseClient.auth.update(user: attributes)
    }

    func supabaseSignIn(idToken: String, nonce: String, fullName: String) async throws {
        do {
            let _ = try await supabaseClient.auth.signInWithIdToken(
                credentials: .init(provider: .apple, idToken: idToken, nonce: nonce)
            )
            try await addUserFullName(fullName)
        } catch {
            print("Supabase sign in failed: \(error)")
            throw error
        }
    }

    @MainActor
    func supabaseSignOut() async {
        try? await supabaseClient.auth.signOut()
        TransitionManager.shared.transitionToLogin()
    }
}