using Deal.Grpc.Sources;
using Deal.Modules.Cards.Application.Sources;

namespace Deal.Api.Sources;

/// <summary>
/// Маппинг generic-контракта источника в доменную модель.
/// </summary>
public static class SourceProtoMapper
{
    /// <summary>
    /// Преобразует protobuf-запись источника в доменную.
    /// </summary>
    /// <param name="request">Запрос PushSource.</param>
    /// <returns>Запись источника домена.</returns>
    public static SourceItem ToItem(PushSourceRequest request) => new()
    {
        Source = ToRef(request.Source),
        Content = ToContent(request.Content),
    };

    private static SourceRef ToRef(SourceRefProto proto) => new()
    {
        Kind = proto.Kind,
        ExternalId = proto.HasExternalId ? proto.ExternalId : null,
        DisplayName = proto.HasDisplayName ? proto.DisplayName : null,
        OriginRef = proto.HasOriginRef ? proto.OriginRef : null,
        Author = proto.HasAuthor ? proto.Author : null,
        ReceivedAt = proto.ReceivedAt != 0 ? DateTimeOffset.FromUnixTimeMilliseconds(proto.ReceivedAt) : DateTimeOffset.UtcNow,
        Extra = proto.Extra.Count > 0 ? new Dictionary<string, string>(proto.Extra) : null,
    };

    private static SourceContent ToContent(SourceContentProto proto)
    {
        var data = new List<DataRef>(proto.Data.Count);
        foreach (DataRefProto item in proto.Data)
        {
            data.Add(ToData(item));
        }

        var contacts = new List<ContactRef>(proto.Contacts.Count);
        foreach (ContactRefProto contact in proto.Contacts)
        {
            contacts.Add(ToContact(contact));
        }

        return new SourceContent
        {
            Text = proto.HasText ? proto.Text : null,
            Html = proto.HasHtml ? proto.Html : null,
            Author = proto.HasAuthor ? proto.Author : null,
            Subject = proto.HasSubject ? proto.Subject : null,
            Data = data,
            Links = proto.Links.Count > 0 ? proto.Links.ToList() : null,
            Contacts = contacts.Count > 0 ? contacts : null,
            Extra = proto.Extra.Count > 0 ? new Dictionary<string, string>(proto.Extra) : null,
        };
    }

    private static DataRef ToData(DataRefProto proto) => new()
    {
        Id = proto.Id,
        Ref = proto.Ref,
        Kind = proto.HasKind ? proto.Kind : null,
        MimeType = proto.HasMimeType ? proto.MimeType : null,
        FileName = proto.HasFileName ? proto.FileName : null,
        Size = proto.HasSize ? proto.Size : null,
        Width = proto.HasWidth ? proto.Width : null,
        Height = proto.HasHeight ? proto.Height : null,
        DurationSec = proto.HasDurationSec ? proto.DurationSec : null,
        PreviewRef = proto.HasPreviewRef ? proto.PreviewRef : null,
        Caption = proto.HasCaption ? proto.Caption : null,
        Order = proto.HasOrder ? proto.Order : null,
        Meta = proto.Meta.Count > 0 ? new Dictionary<string, string>(proto.Meta) : null,
    };

    private static ContactRef ToContact(ContactRefProto proto) => new()
    {
        Kind = proto.HasKind ? proto.Kind : null,
        Name = proto.HasName ? proto.Name : null,
        Phone = proto.HasPhone ? proto.Phone : null,
        Email = proto.HasEmail ? proto.Email : null,
        Url = proto.HasUrl ? proto.Url : null,
    };
}