using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Extensions.Options;
using MongoDB.Driver;
using UGQDatabase.Models;
using UGQDataAccess.Settings;
using ServerCommon.UGQ;

namespace UGQDataAccess.Repository
{
    public class QuestIdSequenceRepository : BaseRepository<QuestIdSequenceEntity>
    {
        private const string CollectionName = "QuestIdSequence";

        public QuestIdSequenceRepository(IMongoClient mongoClient, IOptions<UGQDatabaseSettings> settings) :
            base(mongoClient, settings.Value.DatabaseName, CollectionName)
        {
        }

        public async Task init()
        {
            var found = await Collection.FindAsync(x => x.Id == "QuestId");
            if(found.FirstOrDefault() == null)
            {
                QuestIdSequenceEntity entity = new ()
                {
                    Id = "QuestId",
                    Sequence = 0,
                    UpdatedAt = DateTime.UtcNow,
                    CreatedAt = DateTime.UtcNow,
                };

                await Collection.InsertOneAsync(entity);
            }
        }

        public async Task<long> getNextSequence()
        {
            var filter = Builders<QuestIdSequenceEntity>.Filter.Eq(x => x.Id, "QuestId");
            var update = Builders<QuestIdSequenceEntity>.Update
               .Inc(x => x.Sequence, 1)
               .Set(x => x.UpdatedAt, DateTime.UtcNow);

            var options = new FindOneAndUpdateOptions<QuestIdSequenceEntity>()
            {
                ReturnDocument = ReturnDocument.After
            };

            var result = await Collection.FindOneAndUpdateAsync(filter, update, options);

            return result.Sequence;
        }
    }
}