//
//  EmployeesViewModel.swift
//  EmployeeDirectory
//
//  Created by Matt Bruce on 3/3/25.
//
import Foundation
import Combine

/// ViewModel that will be bound to an Employees model and used
/// specifically with the EmployeesViewController.
@MainActor
public class EmployeesViewModel: ObservableObject {
    @Published var employees: [Employee] = []
    @Published var isLoading = false
    @Published var hasNextPage = false
    
    private var currentPage = 1
    let service: EmployeeServiceProtocol
    
    init(service: EmployeeServiceProtocol) {
        self.service = service
    }
    
    /// Loads the next page of employees.
    func loadEmployees() async {
        guard !isLoading else { return }
        isLoading = true
        do {
            let response = try await service.getUsers(page: currentPage)
            employees.append(contentsOf: response.result)
            hasNextPage = response.hasNextPage
            currentPage += 1
        } catch {
            print("Error loading employees: \(error)")
        }
        isLoading = false
    }
}