using System;
using System.Diagnostics.CodeAnalysis;

namespace StellaOps.Feedser.Source.Ics.Kaspersky.Configuration;

public sealed class KasperskyOptions
{
    public static string HttpClientName => "source.ics.kaspersky";

    public Uri FeedUri { get; set; } = new("https://ics-cert.kaspersky.com/feed-advisories/", UriKind.Absolute);

    public TimeSpan WindowSize { get; set; } = TimeSpan.FromDays(30);

    public TimeSpan WindowOverlap { get; set; } = TimeSpan.FromDays(2);

    public int MaxPagesPerFetch { get; set; } = 3;

    public TimeSpan RequestDelay { get; set; } = TimeSpan.FromMilliseconds(500);

    [MemberNotNull(nameof(FeedUri))]
    public void Validate()
    {
        if (FeedUri is null || !FeedUri.IsAbsoluteUri)
        {
            throw new InvalidOperationException("FeedUri must be an absolute URI.");
        }

        if (WindowSize <= TimeSpan.Zero)
        {
            throw new InvalidOperationException("WindowSize must be greater than zero.");
        }

        if (WindowOverlap < TimeSpan.Zero)
        {
            throw new InvalidOperationException("WindowOverlap cannot be negative.");
        }

        if (WindowOverlap >= WindowSize)
        {
            throw new InvalidOperationException("WindowOverlap must be smaller than WindowSize.");
        }

        if (MaxPagesPerFetch <= 0)
        {
            throw new InvalidOperationException("MaxPagesPerFetch must be positive.");
        }

        if (RequestDelay < TimeSpan.Zero)
        {
            throw new InvalidOperationException("RequestDelay cannot be negative.");
        }
    }
}
