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

namespace Insight.Server.Network.Handlers.Agent;

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

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

    public async ValueTask HandleAsync<TMessage>(AgentSession sender, TMessage message, CancellationToken cancellationToken) where TMessage : IMessage
    {
        if (message is ApplicationList applications)
        {
            await OnApplicationsAsync(sender, applications, cancellationToken);
        }
    }

    private async ValueTask OnApplicationsAsync(AgentSession session, List<Application> applications, 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<HostApplicationEntity>>();

        if (applications is not null && applications.Any())
        {
            foreach (var app in applications)
            {
                var filterDefinition = Builders<HostApplicationEntity>.Filter.And(new List<FilterDefinition<HostApplicationEntity>>
                {
                    Builders<HostApplicationEntity>.Filter.Eq(x => x.Host, hostEntity.Id),
                    Builders<HostApplicationEntity>.Filter.Eq(x => x.Name, app.Name),
                    Builders<HostApplicationEntity>.Filter.Eq(x => x.Architecture, app.Architecture?.ToString())
                });

                var updateDefinition = Builders<HostApplicationEntity>.Update
                    .SetOnInsert(p => p.Insert, date)
                    .SetOnInsert(p => p.Host, hostEntity.Id)
                    .SetOnInsert(p => p.Name, app.Name)
                    .SetOnInsert(p => p.Architecture, app.Architecture?.ToString())
                    .Set(p => p.Update, date)
                    .Set(p => p.Batch, batch)
                    .Set(p => p.Company, app.Publisher)
                    .Set(p => p.Version, app.Version)
                    .Set(p => p.InstallDate, app.InstallDate);

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

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

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