using System.Collections.ObjectModel;
using System.Diagnostics.CodeAnalysis;
using System.Security.Cryptography;
using System.Text;

using FrostFS.Refs;
using FrostFS.SDK.Client;
using FrostFS.SDK.Client.Mappers.GRPC;

using Google.Protobuf;

namespace FrostFS.SDK.Tests.Unit;

[SuppressMessage("Reliability", "CA2007:Consider calling ConfigureAwait on the awaited task", Justification = "Default Value is correct for tests")]
[SuppressMessage("Security", "CA5394:Do not use insecure randomness", Justification = "No secure purpose")]
public class ObjectTest : ObjectTestsBase
{
    [Fact]
    public async void PutObjectTest()
    {
        Mocker.ResultObjectIds!.Add(SHA256.HashData([]));

        Random rnd = new();
        var bytes = new byte[1024];
        rnd.NextBytes(bytes);

        var param = new PrmObjectPut(
            Mocker.ObjectHeader,
            payload: new MemoryStream(bytes),
            clientCut: false);

        var result = await GetClient().PutObjectAsync(param, default);

        var sentMessages = Mocker.ClientStreamWriter!.Messages;

        var body1 = sentMessages.ElementAt(0).GetBody() as Object.PutRequest.Types.Body;
        var body2 = sentMessages.ElementAt(1).GetBody() as Object.PutRequest.Types.Body;

        Assert.NotNull(result);
        Assert.Equal(Mocker.ResultObjectIds.First(), result.ToHash());

        Assert.True(Mocker.ClientStreamWriter.CompletedTask);

        Assert.Equal(0, body1!.Chunk.Length);
        Assert.Equal(Object.PutRequest.Types.Body.ObjectPartOneofCase.Init, body1!.ObjectPartCase);

        Assert.Equal(1024, body2!.Chunk.Length);
        Assert.Equal(Object.PutRequest.Types.Body.ObjectPartOneofCase.Chunk, body2!.ObjectPartCase);
    }

    [Fact]
    public async void ClientCutTest()
    {
        NetworkMocker.Parameters.Add("MaxObjectSize", [0x0, 0xa]);

        var blockSize = 2560;
        byte[] bytes = File.ReadAllBytes(@".\..\..\..\cat.jpg");
        var fileLength = bytes.Length;

        var param = new PrmObjectPut(
            Mocker.ObjectHeader,
            payload: new MemoryStream(bytes),
            bufferMaxSize: 1024,
            clientCut: true);

        Random rnd = new();

        Collection<byte[]> objIds = new([new byte[32], new byte[32], new byte[32]]);
        rnd.NextBytes(objIds.ElementAt(0));
        rnd.NextBytes(objIds.ElementAt(1));
        rnd.NextBytes(objIds.ElementAt(2));

        foreach (var objId in objIds)
            Mocker.ResultObjectIds!.Add(objId);

        var result = await GetClient().PutObjectAsync(param, default);

        var singleObjects = Mocker.PutSingleRequests.ToArray();

        Assert.NotNull(Mocker.ClientStreamWriter?.Messages);
        var streamObjects = Mocker.ClientStreamWriter.Messages.ToArray();

        Assert.Single(singleObjects);

        Assert.Equal(11, streamObjects.Length);

        var bodies = streamObjects.Select(o => ((Object.PutRequest)o).Body).ToArray();

        Assert.Equal(3, bodies.Count(b => b.Init != null));
        Assert.Equal(5, bodies.Count(b => b.Chunk.Length == 1024));

        Assert.Equal(596, ((Object.PutRequest)streamObjects[10]).Body.Chunk.Length);

        var linkObject = singleObjects[0].Body.Object;
        var header1 = bodies[0].Init.Header;
        var header2 = bodies[4].Init.Header;
        var header3 = bodies[8].Init.Header;

        var payload1 = bodies[1].Chunk
            .Concat(bodies[2].Chunk)
            .Concat(bodies[3].Chunk)
            .ToArray();

        var payload2 = bodies[5].Chunk
           .Concat(bodies[6].Chunk)
           .Concat(bodies[7].Chunk)
           .ToArray();

        var payload3 = bodies[9].Chunk
           .Concat(bodies[10].Chunk)
           .ToArray();

        Assert.NotNull(header1.Split.SplitId);
        Assert.Null(header1.Split.Previous);
        Assert.Equal(bytes[..blockSize], payload1);
        Assert.True(header1.Attributes.Count == 0);

        Assert.Equal(header1.Split.SplitId, header2.Split.SplitId);
        Assert.Equal(objIds.ElementAt(0), header2.Split.Previous.Value);
        Assert.Equal(bytes[blockSize..(blockSize * 2)], payload2);
        Assert.True(header2.Attributes.Count == 0);

        // last part
        Assert.NotNull(header3.Split.Parent);
        Assert.NotNull(header3.Split.ParentHeader);
        Assert.NotNull(header3.Split.ParentSignature);
        Assert.Equal(header2.Split.SplitId, header3.Split.SplitId);
        Assert.Equal(bytes[(fileLength / blockSize * blockSize)..fileLength], payload3);
        Assert.True(header3.Attributes.Count == 0);

        //link object
        Assert.Equal(header3.Split.Parent, linkObject.Header.Split.Parent);
        Assert.Equal(header3.Split.ParentHeader, linkObject.Header.Split.ParentHeader);
        Assert.Equal(header3.Split.SplitId, linkObject.Header.Split.SplitId);
        Assert.Equal(0, (int)linkObject.Header.PayloadLength);
        Assert.True(header3.Attributes.Count == 0);

        Assert.Single(linkObject.Header.Split.ParentHeader.Attributes);
        Assert.Equal("k", linkObject.Header.Split.ParentHeader.Attributes[0].Key);
        Assert.Equal("v", linkObject.Header.Split.ParentHeader.Attributes[0].Value);

        var modelObjId = FrostFsObjectId.FromHash(linkObject.Header.Split.Parent.Value.ToByteArray());

        Assert.Equal(result.Value, modelObjId.ToString());
    }

    [Fact]
    public async void DeleteObject()
    {
        Mocker.ObjectId = new ObjectID { Value = ByteString.CopyFrom(SHA256.HashData(Encoding.UTF8.GetBytes("test"))) }.ToModel();

        await GetClient().DeleteObjectAsync(new PrmObjectDelete(ContainerId, Mocker.ObjectId), default);

        var request = Mocker.DeleteRequests.FirstOrDefault();
        Assert.NotNull(request);
        Assert.Equal(ContainerId.ToMessage().Value, request.Body.Address.ContainerId.Value);
        Assert.Equal(Mocker.ObjectId.ToMessage().Value, request.Body.Address.ObjectId.Value);
    }

    [Fact]
    public async void GetHeaderTest()
    {
        Mocker.ObjectId = new ObjectID { Value = ByteString.CopyFrom(SHA256.HashData(Encoding.UTF8.GetBytes("test"))) }.ToModel();

        var res = await GetClient().GetObjectHeadAsync(new PrmObjectHeadGet(ContainerId, Mocker.ObjectId), default);

        var objHeader = res.HeaderInfo;
        Assert.NotNull(objHeader);

        var request = Mocker.HeadRequests.FirstOrDefault();
        Assert.NotNull(request);
        Assert.Equal(ContainerId.ToMessage(), request.Body.Address.ContainerId);
        Assert.Equal(Mocker.ObjectId.ToMessage(), request.Body.Address.ObjectId);

        Assert.NotNull(objHeader);
        Assert.Equal(ContainerId.GetValue(), objHeader.ContainerId.GetValue());

        Assert.Equal(Mocker.ObjectHeader!.OwnerId!.Value, objHeader.OwnerId!.Value);
        Assert.Equal(Mocker.ObjectHeader!.Version!.ToString(), objHeader.Version!.ToString());

        Assert.Equal(Mocker.HeadResponse!.PayloadLength, objHeader.PayloadLength);

        Assert.Equal(FrostFsObjectType.Regular, objHeader.ObjectType);

        Assert.NotNull(objHeader.Attributes);
        Assert.Single(objHeader.Attributes);

        Assert.Equal(Mocker.HeadResponse.Attributes[0].Key, objHeader.Attributes.First().Key);
        Assert.Equal(Mocker.HeadResponse.Attributes[0].Value, objHeader.Attributes.First().Value);

        Assert.Null(objHeader.Split);
    }

    [Fact]
    public async void GetRangeTest()
    {
        Mocker.ResultObjectIds!.Add(SHA256.HashData([]));

        Random rnd = new();
        var bytes = new byte[1024];
        rnd.NextBytes(bytes);

        Mocker.RangeResponse = bytes;

        Mocker.ObjectId = new ObjectID { Value = ByteString.CopyFrom(SHA256.HashData(Encoding.UTF8.GetBytes("test"))) }.ToModel();

        var param = new PrmRangeGet(ContainerId, Mocker.ObjectId, new FrostFsRange(100, (ulong)Mocker.RangeResponse.Length));

        var result = await GetClient().GetRangeAsync(param, default);

        Assert.NotNull(Mocker.GetRangeRequest);

        Assert.Equal(param.Range.Offset, Mocker.GetRangeRequest.Body.Range.Offset);
        Assert.Equal(param.Range.Length, Mocker.GetRangeRequest.Body.Range.Length);

        Assert.NotNull(result);

        var chunk = await result.ReadChunk();

        var chunkBytes = chunk.Value.Span.ToArray();

        Assert.Equal(chunkBytes.Length, Mocker.RangeResponse.Length);

        Assert.Equal(SHA256.HashData(bytes), SHA256.HashData(Mocker.RangeResponse));
    }

    [Fact]
    public async void GetRangeHashTest()
    {
        Mocker.ResultObjectIds!.Add(SHA256.HashData([]));

        Random rnd = new();
        var bytes = new byte[1024];
        rnd.NextBytes(bytes);

        var salt = new byte[32];
        rnd.NextBytes(salt);

        var hash = new byte[32];
        rnd.NextBytes(hash);

        Mocker.RangeResponse = bytes;
        var len = (ulong)bytes.Length;

        Mocker.RangeHashResponses.Add(ByteString.CopyFrom(hash));

        Mocker.ObjectId = new ObjectID { Value = ByteString.CopyFrom(SHA256.HashData(Encoding.UTF8.GetBytes("test"))) }.ToModel();

        var param = new PrmRangeHashGet(ContainerId, Mocker.ObjectId, [new FrostFsRange(100, len)], salt);

        var result = await GetClient().GetRangeHashAsync(param, default);

        Assert.NotNull(Mocker.GetRangeHashRequest);

        Assert.Equal(param.Ranges[0].Offset, Mocker.GetRangeHashRequest.Body.Ranges[0].Offset);
        Assert.Equal(param.Ranges[0].Length, Mocker.GetRangeHashRequest.Body.Ranges[0].Length);

        Assert.NotNull(result);
        Assert.Single(result);

        Assert.Equal(SHA256.HashData(hash), SHA256.HashData(result.First().ToArray()));
    }

    [Fact]
    public async void PatchTest()
    {
        Mocker.ObjectId = new ObjectID { Value = ByteString.CopyFrom(SHA256.HashData(Encoding.UTF8.GetBytes("test"))) }.ToModel();

        var address = new FrostFsAddress(ContainerId, Mocker.ObjectId);

        Mocker.ResultObjectIds!.Add(SHA256.HashData([]));

        Random rnd = new();
        var patch = new byte[32];
        rnd.NextBytes(patch);

        var range = new FrostFsRange(8, (ulong)patch.Length);

        var param = new PrmObjectPatch(
            address,
            payload: new MemoryStream(patch),
            maxChunkLength: 32,
            range: range);

        var result = await GetClient().PatchObjectAsync(param, default);

        Assert.NotNull(result);

        Assert.NotNull(result.Value);

        Assert.NotNull(Mocker.PatchStreamWriter);
        Assert.Single(Mocker.PatchStreamWriter.Messages);

        var sentMessages = Mocker.PatchStreamWriter!.Messages;

        var body = sentMessages.First().GetBody() as Object.PatchRequest.Types.Body;

        Assert.NotNull(body);

        Assert.True(Mocker.PatchStreamWriter.CompletedTask);

        Assert.Equal(address.ContainerId, body.Address.ContainerId);
        Assert.Equal(address.ObjectId, body.Address.ObjectId);

        Assert.Equal(32, body.Patch.Chunk.Length);

        Assert.Equal(SHA256.HashData(patch), SHA256.HashData(body.Patch.Chunk.ToArray()));
    }
}