using System.Collections;

namespace ComiServ.Models;

public class RequestError : IEnumerable<string>
{
    public static RequestError InvalidHandle => new("Invalid handle");
    public static RequestError ComicNotFound => new("Comic not found");
    public static RequestError CoverNotFound => new("Cover not found");
    public static RequestError PageNotFound => new("Page not found");
    public static RequestError FileNotFound => new("File not found");
    public static RequestError ThumbnailNotFound => new("Thumbnail not found");
    public static RequestError NotAuthenticated => new("Not authenticated");
    public static RequestError NoAccess => new("User does not have access to this resource");
    public static RequestError UserNotFound => new("User not found");
    public static RequestError ComicFileExists => new("Comic file exists so comic not deleted");
    public static RequestError UserSpecificEndpoint => new("Endpoint is user-specific, requires login");
    public string[] Errors { get; }
    public RequestError(string ErrorMessage)
    {
        Errors = [ErrorMessage];
    }
    public RequestError()
    {
        Errors = [];
    }
    public RequestError(IEnumerable<string> ErrorMessages)
    {
        Errors = ErrorMessages.ToArray();
    }
    public RequestError And(RequestError other)
    {
        return new RequestError(Errors.Concat(other.Errors));
    }
    public RequestError And(string other)
    {
        return new RequestError(Errors.Append(other));
    }
    public RequestError And(IEnumerable<string> other)
    {
        return new RequestError(Errors.Concat(other));
    }
    public IEnumerator<string> GetEnumerator()
    {
        return ((IEnumerable<string>)Errors).GetEnumerator();
    }
    IEnumerator IEnumerable.GetEnumerator()
    {
        return GetEnumerator();
    }
}