Email & Phone Login

import AuthenticationServices
import ParaSwift

struct AuthenticationView: View {
    @EnvironmentObject var paraManager: ParaManager
    @Environment(\.authorizationController) private var authorizationController
    @Environment(\.webAuthenticationSession) private var webAuthenticationSession

    @State private var pendingState: AuthState? // Only used if you enable OTP/passkey requirements

    var body: some View {
        VStack {
            // Render your auth UI and call startAuth(identifier:)
        }
        .task {
            paraManager.setDefaultWebAuthenticationSession(webAuthenticationSession)
        }
    }

    private func startAuth(identifier: String) {
        let auth: Auth = identifier.contains("@")
            ? .email(identifier.lowercased())
            : .phone(identifier) // Expect E.164 format

        Task {
            do {
                let state = try await paraManager.initiateAuthFlow(auth: auth)

                switch state.stage {
                case .done:
                    completeLogin()
                case .verify:
                    // Store state to finish OTP/passkey signup later if you enabled it
                    pendingState = state
                case .login:
                    try await paraManager.handleLogin(
                        authState: state,
                        authorizationController: authorizationController
                    )
                    completeLogin()
                case .signup:
                    // Signup completes after OTP + passkey if required
                    break
                }
            } catch {
                // Handle errors according to your UI needs
            }
        }
    }
}

private func completeLogin() {
    // Mark the user as authenticated in your app
}

private func submitOtp(_ code: String) {
    guard let pendingState else { return }

    Task {
        do {
            let verifiedState = try await paraManager.handleVerificationCode(
                verificationCode: code
            )

            try await paraManager.handleSignup(
                authState: verifiedState,
                method: .passkey,
                authorizationController: authorizationController
            )

            completeLogin()
        } catch {
            // Handle errors according to your UI needs
        }
    }
}

private func loginWithPasskey(email: String?) {
    Task {
        do {
            try await paraManager.loginWithPasskey(
                authorizationController: authorizationController,
                email: email,
                phone: nil
            )
            completeLogin()
        } catch {
            // Handle errors according to your UI needs
        }
    }
}