//
//  LoginViewModel.swift
//  medmap
//

import Foundation
import SwiftUI
import Combine
@MainActor
final class LoginViewModel: ViewModel {

    @Published var email = ""
    @Published var password = ""
    @Published private(set) var errorMessage: String?
    @Published private(set) var authenticatedPatient: LoginResponse?

    private let api: MedMapAPI

    init(api: MedMapAPI = MedMapAPI()) {
        self.api = api
        super.init()
    }

    var canSubmit: Bool {
        !email.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty && !password.isEmpty && !isLoading
    }

    func showSignup() {
        appStateManager.navigateTo(state: .signup)
    }

    func login() async {
        guard canSubmit else { return }

        errorMessage = nil
        isLoading = true
        defer { isLoading = false }

        do {
            let response = try await api.login(
                email: email.trimmingCharacters(in: .whitespacesAndNewlines),
                password: password
            )

            guard response.role == .patient else {
                errorMessage = "Esta aplicacao esta disponivel apenas para doentes."
                return
            }

            authenticatedPatient = response
            appStateManager.navigateTo(state: .dashboard)
        } catch {
            errorMessage = "Nao foi possivel iniciar sessao. Confirme o email e a palavra-passe."
            fluxlog("Patient login failed: \(error.localizedDescription)")
        }
    }
}