import SwiftUI

@MainActor
final class AppState: ObservableObject {
    @Published var userId: Int?
    @Published var userName: String?
    @Published var userPhotoUrl: String?
    @Published var userToken: String?
    @Published var businessId: Int = 0
    @Published var businessName: String = ""
    @Published var isAuthenticated = false

    func setAuth(userId: Int, token: String, userName: String? = nil, photoUrl: String? = nil) {
        self.userId = userId
        self.userToken = token
        self.userName = userName
        self.userPhotoUrl = photoUrl
        self.isAuthenticated = true
    }

    func setBusiness(id: Int, name: String) {
        self.businessId = id
        self.businessName = name
    }

    func clearAuth() {
        userId = nil
        userToken = nil
        userName = nil
        userPhotoUrl = nil
        isAuthenticated = false
        businessId = 0
        businessName = ""
    }

    /// Handle 401 unauthorized — clear everything and force re-login
    func handleUnauthorized() async {
        await AuthStorage.shared.clearAuth()
        await APIService.shared.logout()
        clearAuth()
    }

    func loadSavedAuth() async {
        let creds = await AuthStorage.shared.loadAuth()
        guard let creds = creds else { return }
        await APIService.shared.setAuth(token: creds.token, userId: creds.userId)
        setAuth(userId: creds.userId, token: creds.token, userName: creds.userName, photoUrl: creds.photoUrl)
    }
}