using Insight.Domain.Interfaces;
using Insight.Domain.Network;
using Insight.Domain.Network.Agent.Messages;
using Insight.Infrastructure.Entities;
using MongoDB.Bson;
using MongoDB.Driver;

namespace Insight.Server.Network.Agent.Handlers;

public class VideocardHandler : IMessageHandler<AgentSession>
{
    private readonly IMongoDatabase _database;

    public VideocardHandler(IMongoDatabase database)
    {
        _database = database;
    }

    public async ValueTask HandleAsync<TMessage>(AgentSession sender, TMessage message, CancellationToken cancellationToken) where TMessage : IMessage
    {
        switch (message)
        {
            case Collection<Videocard> videocards:
                await OnVideocardsAsync(sender, videocards, cancellationToken);
                break;
        }
    }

    private async ValueTask OnVideocardsAsync(AgentSession session, List<Videocard>? videocards, CancellationToken cancellationToken)
    {
        var agentEntity = await _database.Agent().Find(Builders<AgentEntity>.Filter.Eq(p => p.Id, session.Id)).FirstOrDefaultAsync(cancellationToken);
        if (agentEntity is null) return;

        var hostEntity = await _database.Host().Find(Builders<HostEntity>.Filter.Eq(p => p.Agent, agentEntity.Id)).FirstOrDefaultAsync(cancellationToken);
        if (hostEntity is null) return;

        var batch = ObjectId.GenerateNewId().ToString();
        var date = DateTime.Now;

        var bulk = new List<WriteModel<HostVideocardEntity>>();

        if (videocards is not null && videocards.Any())
        {
            foreach (var videocard in videocards)
            {
                var filterDefinition = Builders<HostVideocardEntity>.Filter.And(new List<FilterDefinition<HostVideocardEntity>>
                    {
                        Builders<HostVideocardEntity>.Filter.Eq(x => x.Host, hostEntity.Id),
                        Builders<HostVideocardEntity>.Filter.Eq(x => x.Name, videocard.Model)
                    });

                var updateDefinition = Builders<HostVideocardEntity>.Update
                    .SetOnInsert(p => p.Insert, date)
                    .SetOnInsert(p => p.Host, hostEntity.Id)
                    .SetOnInsert(p => p.Name, videocard.Model)
                    .Set(p => p.Update, date)
                    .Set(p => p.Batch, batch)
                    .Set(p => p.Company, null)
                    .Set(p => p.Memory, videocard.Memory)
                    .Set(p => p.Driver, videocard.DriverVersion)
                    .Set(p => p.Date, videocard.DriverDate);

                bulk.Add(new UpdateOneModel<HostVideocardEntity>(filterDefinition, updateDefinition)
                {
                    IsUpsert = true
                });
            }

            bulk.Add(new DeleteManyModel<HostVideocardEntity>(Builders<HostVideocardEntity>.Filter.And(new List<FilterDefinition<HostVideocardEntity>>
                {
                    Builders<HostVideocardEntity>.Filter.Eq(x => x.Host, hostEntity.Id),
                    Builders<HostVideocardEntity>.Filter.Ne(x => x.Batch, batch)
                })));

            var result = await _database.HostVideocard().BulkWriteAsync(bulk, cancellationToken: cancellationToken);
        }
    }
}