/* Copyright 2010-present MongoDB Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using MongoDB.Bson;
using MongoDB.Bson.Serialization;

namespace MongoDB.Driver
{
    /// <summary>
    /// Base class for implementors of <see cref="IMongoIndexManager{TDocument}"/>.
    /// </summary>
    /// <typeparam name="TDocument">The type of the document.</typeparam>
    public abstract class MongoIndexManagerBase<TDocument> : IMongoIndexManager<TDocument>
    {
        // public properties
        /// <inheritdoc />
        public abstract CollectionNamespace CollectionNamespace { get; }

        /// <inheritdoc />
        public abstract IBsonSerializer<TDocument> DocumentSerializer { get; }

        /// <inheritdoc />
        public abstract MongoCollectionSettings Settings { get; }

        // public methods
        /// <inheritdoc />
        [Obsolete("Use CreateOne with a CreateIndexModel instead.")]
        public virtual string CreateOne(IndexKeysDefinition<TDocument> keys, CreateIndexOptions options = null, CancellationToken cancellationToken = default(CancellationToken))
        {
            var model = new CreateIndexModel<TDocument>(keys, options);
            var result = CreateMany(new[] { model }, cancellationToken);
            return result.Single();
        }

         /// <inheritdoc />
        public virtual string CreateOne(
            CreateIndexModel<TDocument> model,
            CreateOneIndexOptions options = null,
            CancellationToken cancellationToken = default(CancellationToken))
        {
            var createManyIndexOptions = ToCreateManyIndexesOptions(options); 
            var result = CreateMany(new[] { model }, createManyIndexOptions, cancellationToken);
            return result.Single();
        }

        /// <inheritdoc />
        [Obsolete("Use CreateOne with a CreateIndexModel instead.")]
        public virtual string CreateOne(IClientSessionHandle session, IndexKeysDefinition<TDocument> keys, CreateIndexOptions options = null, CancellationToken cancellationToken = default(CancellationToken))
        {
            var model = new CreateIndexModel<TDocument>(keys, options);
            var result = CreateMany(session, new[] { model }, cancellationToken);
            return result.Single();
        }
        
        /// <inheritdoc />
        public virtual string CreateOne(
            IClientSessionHandle session,
            CreateIndexModel<TDocument> model, 
            CreateOneIndexOptions options = null,
            CancellationToken cancellationToken = default(CancellationToken))
        {
            var createManyIndexOptions = ToCreateManyIndexesOptions(options); 
            var result = CreateMany(session, new[] { model }, createManyIndexOptions, cancellationToken);
            return result.Single();
        }

        /// <inheritdoc />
        [Obsolete("Use CreateOneAsync with a CreateIndexModel instead.")]
        public virtual async Task<string> CreateOneAsync(IndexKeysDefinition<TDocument> keys, CreateIndexOptions options = null, CancellationToken cancellationToken = default(CancellationToken))
        {
            var model = new CreateIndexModel<TDocument>(keys, options);
            var result = await CreateManyAsync(new[] { model }, cancellationToken).ConfigureAwait(false);
            return result.Single();
        }

        /// <inheritdoc />
        public virtual async Task<string> CreateOneAsync(
            CreateIndexModel<TDocument> model,
            CreateOneIndexOptions options = null,
            CancellationToken cancellationToken = default(CancellationToken))
        {
             var createManyIndexOptions = ToCreateManyIndexesOptions(options);
             var result = await CreateManyAsync(new[] { model }, createManyIndexOptions, cancellationToken).ConfigureAwait(false);
             return result.Single();
        }

        /// <inheritdoc />
        [Obsolete("Use CreateOneAsync with a CreateIndexModel instead.")]
        public virtual async Task<string> CreateOneAsync(IClientSessionHandle session, IndexKeysDefinition<TDocument> keys, CreateIndexOptions options = null, CancellationToken cancellationToken = default(CancellationToken))
        {
            var model = new CreateIndexModel<TDocument>(keys, options);
            var result = await CreateManyAsync(session, new[] { model }, cancellationToken).ConfigureAwait(false);
            return result.Single();
        }

        /// <inheritdoc />
        public virtual async Task<string> CreateOneAsync(
            IClientSessionHandle session,
            CreateIndexModel<TDocument> model,
            CreateOneIndexOptions options = null,
            CancellationToken cancellationToken = default(CancellationToken))
        {
            var createManyIndexOptions = ToCreateManyIndexesOptions(options);
            var result = await CreateManyAsync(session, new[] { model }, createManyIndexOptions, cancellationToken).ConfigureAwait(false);
            return result.Single();
        }

        /// <inheritdoc />
        public virtual IEnumerable<string> CreateMany(IEnumerable<CreateIndexModel<TDocument>> models, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual IEnumerable<string> CreateMany(
            IEnumerable<CreateIndexModel<TDocument>> models,
            CreateManyIndexesOptions options,
            CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual IEnumerable<string> CreateMany(IClientSessionHandle session, IEnumerable<CreateIndexModel<TDocument>> models, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual IEnumerable<string> CreateMany(IClientSessionHandle session, IEnumerable<CreateIndexModel<TDocument>> models, CreateManyIndexesOptions options,
            CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual Task<IEnumerable<string>> CreateManyAsync(IEnumerable<CreateIndexModel<TDocument>> models, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual Task<IEnumerable<string>> CreateManyAsync(IEnumerable<CreateIndexModel<TDocument>> models, CreateManyIndexesOptions options,
            CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual Task<IEnumerable<string>> CreateManyAsync(IClientSessionHandle session, IEnumerable<CreateIndexModel<TDocument>> models, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual Task<IEnumerable<string>> CreateManyAsync(
            IClientSessionHandle session,
            IEnumerable<CreateIndexModel<TDocument>> models,
            CreateManyIndexesOptions options,
            CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual void DropAll(DropIndexOptions options, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual void DropAll(CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual void DropAll(IClientSessionHandle session, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual void DropAll(IClientSessionHandle session, DropIndexOptions options, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual Task DropAllAsync(DropIndexOptions options, CancellationToken cancellationToken)
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public abstract Task DropAllAsync(CancellationToken cancellationToken = default(CancellationToken));

        /// <inheritdoc />
        public virtual Task DropAllAsync(IClientSessionHandle session, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual Task DropAllAsync(IClientSessionHandle session, DropIndexOptions options, CancellationToken cancellationToken)
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual void DropOne(string name, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual void DropOne(string name, DropIndexOptions options, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual void DropOne(IClientSessionHandle session, string name, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual void DropOne(IClientSessionHandle session, string name, DropIndexOptions options, CancellationToken cancellationToken)
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public abstract Task DropOneAsync(string name, CancellationToken cancellationToken = default(CancellationToken));

        /// <inheritdoc />
        public virtual Task DropOneAsync(string name, DropIndexOptions options, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual Task DropOneAsync(IClientSessionHandle session, string name, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual Task DropOneAsync(IClientSessionHandle session, string name, DropIndexOptions options, CancellationToken cancellationToken)
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual IAsyncCursor<BsonDocument> List(CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public virtual IAsyncCursor<BsonDocument> List( IClientSessionHandle session, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public abstract Task<IAsyncCursor<BsonDocument>> ListAsync(CancellationToken cancellationToken = default(CancellationToken));

        /// <inheritdoc />
        public virtual Task<IAsyncCursor<BsonDocument>> ListAsync(IClientSessionHandle session, CancellationToken cancellationToken = default(CancellationToken))
        {
            throw new NotImplementedException();
        }

        private CreateManyIndexesOptions ToCreateManyIndexesOptions(CreateOneIndexOptions options)
        {
            return new CreateManyIndexesOptions { MaxTime = options?.MaxTime };
        }
    }
}