using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using Google.Protobuf.WellKnownTypes;
using INetMock.Client.Audit.Details;

namespace INetMock.Client.Audit
{
    public abstract record EventDetails;

    public record EmptyDetails : EventDetails;

    public record GenericDetails : EventDetails
    {
        private readonly Any? _detailsAny;

        public GenericDetails()
        {
            _detailsAny = null;
        }

        public GenericDetails(Any? any)
        {
            _detailsAny = any;
        }

        public static implicit operator HttpDetails(GenericDetails gd)
        {
            if (gd._detailsAny == null || gd._detailsAny.Value == null) return new();
            if (!gd._detailsAny.TypeUrl.EndsWith(HTTPDetailsEntity.Descriptor.FullName))
                throw new InvalidOperationException();
            return new HttpDetails(gd._detailsAny);
        }

        public static implicit operator DnsDetails(GenericDetails gd)
        {
            if (gd._detailsAny == null || gd._detailsAny.Value == null) return new();
            if (!gd._detailsAny.TypeUrl.EndsWith(HTTPDetailsEntity.Descriptor.FullName))
                throw new InvalidOperationException();
            return new DnsDetails(gd._detailsAny);
        }
    }

    public record HttpDetails : EventDetails
    {
        public HttpDetails()
        {
        }

        public HttpDetails(Any? any)
        {
            if (any == null || any.Value == null) return;

            var detailsEntity = HTTPDetailsEntity.Parser.ParseFrom(any.Value);

            Method = new HttpMethod(detailsEntity.Method.ToString());
            Host = detailsEntity.Host;
            Uri = detailsEntity.Uri;
            Proto = detailsEntity.Proto;
            Headers = new INetMockHttpHeaders(detailsEntity.Headers);
        }

        public HttpMethod Method { get; init; }
        public string Host { get; init; }
        public string Uri { get; init; }
        public string Proto { get; init; }
        public HttpHeaders Headers { get; init; }
    }

    public record DnsDetails : EventDetails
    {
        public DnsDetails()
        {
        }

        public DNSOpCode OpCode { get; init; }

        public IReadOnlyList<DNSQuestionEntity> Questions { get; init; }

        public DnsDetails(Any? any)
        {
            if (any == null || any.Value == null) return;

            var entity = DNSDetailsEntity.Parser.ParseFrom(any.Value);
            OpCode = entity.Opcode;
            Questions = entity.Questions;
        }
    }
}