using System.Collections.ObjectModel;
using System.Linq;
using FrostFS.Object;
using FrostFS.SDK.Client.Mappers.GRPC;

namespace FrostFS.SDK;

public class FrostFsSplit(SplitId splitId,
    FrostFsObjectId? previous = null,
    FrostFsObjectId? parent = null,
    FrostFsObjectHeader? parentHeader = null,
    FrostFsSignature? parentSignature = null,
    ReadOnlyCollection<FrostFsObjectId>? children = null)
{
    private Header.Types.Split? _split;

    public FrostFsSplit() : this(new SplitId())
    {
    }

    public SplitId SplitId { get; private set; } = splitId;

    public FrostFsObjectId? Previous { get; } = previous;

    public FrostFsObjectId? Parent { get; internal set; } = parent;

    public FrostFsSignature? ParentSignature { get; } = parentSignature;

    public FrostFsObjectHeader? ParentHeader { get; set; } = parentHeader;

    public ReadOnlyCollection<FrostFsObjectId>? Children { get; } = children;

    public Header.Types.Split GetSplit()
    {
        if (_split == null)
        {
            _split = new Header.Types.Split
            {
                SplitId = SplitId?.GetSplitId(),
                Parent = Parent?.ToMessage(),
                ParentHeader = ParentHeader?.GetHeader(),
                ParentSignature = ParentSignature?.ToMessage(),
                Previous = Previous?.ToMessage(),
            };

            if (Children != null)
            {
                _split.Children.AddRange(Children.Select(x => x.ToMessage()));
            }
        }

        return _split;
    }
}