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 ProcessorHandler : IMessageHandler<AgentSession>
{
    private readonly IMongoDatabase _database;

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

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

    private async ValueTask OnProcessorsAsync(AgentSession session, List<Processor> processors, 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<HostProcessorEntity>>();

        if (processors is not null && processors.Any())
        {
            foreach (var processor in processors)
            {
                var filterDefinition = Builders<HostProcessorEntity>.Filter.And(new List<FilterDefinition<HostProcessorEntity>>
                    {
                        Builders<HostProcessorEntity>.Filter.Eq(x => x.Host, hostEntity.Id),
                        Builders<HostProcessorEntity>.Filter.Eq(x => x.Index, processor.Index)
                    });

                var updateDefinition = Builders<HostProcessorEntity>.Update
                    .SetOnInsert(p => p.Insert, date)
                    .SetOnInsert(p => p.Host, hostEntity.Id)
                    .SetOnInsert(p => p.Index, processor.Index)
                    .Set(p => p.Update, date)
                    .Set(p => p.Batch, batch)
                    .Set(p => p.Company, processor.Manufacturer)
                    .Set(p => p.Name, processor.Name)
                    .Set(p => p.Socket, processor.Socket)
                    .Set(p => p.Serial, processor.SerialNumber)
                    .Set(p => p.Version, processor.Version)
                    .Set(p => p.Cores, processor.Cores)
                    .Set(p => p.LogicalCores, processor.LogicalCores)
                    .Set(p => p.Clock, processor.MaxSpeed)
                    .Set(p => p.CurrentClock, processor.CurrentSpeed)
                    .Set(p => p.L1Size, processor.L1Size)
                    .Set(p => p.L2Size, processor.L2Size)
                    .Set(p => p.L3Size, processor.L3Size)
                    .Set(p => p.Virtualization, processor.Virtualization)
                    .Set(p => p.PNP, processor.DeviceId);

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

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

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