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

public class EmployeeService: EmployeeServiceProtocol {
    // MARK: - Properties
    public static let shared = EmployeeService() // Default shared instance
    
    // MARK: - Initializer
    
    public init() {}
    
    // MARK: - Public Methods
    
    /// This will get a list of all employees
    /// - Returns: An Employees struct
    public func getUsers(page: Int? = nil) async throws -> Employees {
        var endpoint = "https://my.api.mockaroo.com/users.json?key=f298b840"
        if let page {
            endpoint += "&page=\(page)"
        }
        
        //ensure a valid URL
        guard let url = URL(string: endpoint) else {
            throw URLError(.badURL)
        }

        // Perform network request
        let (data, response) = try await URLSession.shared.data(from: url)
        
        // Validate HTTP response
        guard let httpResponse = response as? HTTPURLResponse,
              200..<300 ~= httpResponse.statusCode else {
            throw URLError(.badServerResponse)
        }
        
        // Decode the response into the specified type
        return try JSONDecoder().decode(Employees.self, from: data)
    }
}