import Foundation
import ManaCore
import Observation

/// State-Maschine für ``ManaEmailVerifyGateView``. Wraps
/// `AuthClient.resendVerification`.
@MainActor
@Observable
public final class EmailVerifyGateViewModel {
    public enum Status: Equatable, Sendable {
        case idle
        case resending
        case resent(String)
        case error(String)
    }

    public let email: String
    public private(set) var status: Status = .idle

    private let auth: AuthClient
    private let sourceAppUrl: URL?

    public init(email: String, auth: AuthClient, sourceAppUrl: URL? = nil) {
        self.email = email
        self.auth = auth
        self.sourceAppUrl = sourceAppUrl
    }

    public var canResend: Bool {
        if case .resending = status { return false }
        return true
    }

    public var isResending: Bool {
        if case .resending = status { return true }
        return false
    }

    public func resend() async {
        status = .resending
        do {
            try await auth.resendVerification(email: email, sourceAppUrl: sourceAppUrl)
            status = .resent("Bestätigungs-Mail wurde verschickt. Schau in deinen Posteingang.")
        } catch let error as AuthError {
            status = .error(error.errorDescription ?? "Senden fehlgeschlagen")
        } catch {
            status = .error(String(describing: error))
        }
    }
}