AuthRepository

class LoginViewModel(
    private val authRepository: AuthRepository
) : ViewModel() {
    private val _state = MutableStateFlow(LoginUiState())
    val state: StateFlow<LoginUiState> = _state.asStateFlow()

    fun onLogin(username: String, password: String) {
        viewModelScope.launch {
            _state.update { it.copy(isLoading = true, error = null) }
            
            authRepository.login(username.trim(), password)
                .onSuccess { session ->
                    _state.update { it.copy(
                        isLoading = false,
                        isAuthenticated = true
                    ) }
                }
                .onFailure { error ->
                    _state.update { it.copy(
                        isLoading = false,
                        error = error.message ?: "Login failed"
                    ) }
                }
        }
    }
    
    fun validateSession() {
        viewModelScope.launch {
            val isValid = authRepository.validateSession()
            _state.update { it.copy(isAuthenticated = isValid) }
        }
    }
    
    fun logout() {
        viewModelScope.launch {
            authRepository.logout()
                .onSuccess {
                    _state.update { it.copy(isAuthenticated = false) }
                }
        }
    }
}