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// to you under the Apache License, Version 2.0 (the
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// 
//   http://www.apache.org/licenses/LICENSE-2.0
// 
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using Org.Apache.REEF.Common.Evaluator.Parameters;
using Org.Apache.REEF.IO.FileSystem.AzureBlob.Parameters;
using Org.Apache.REEF.IO.FileSystem.AzureBlob.RetryPolicy;
using Org.Apache.REEF.Tang.Annotations;
using Org.Apache.REEF.Tang.Implementations.Tang;
using Org.Apache.REEF.Tang.Interface;
using Org.Apache.REEF.Tang.Util;

namespace Org.Apache.REEF.IO.FileSystem.AzureBlob
{
    /// <summary>
    /// This provider provides configuration for Azure Block Blob File System
    /// The client that is going to use AzureBlockBlobFileSystem in its driver and evaluators should set 
    /// configuration data through AzureBlockBlobFileSystem configuration module in the client's configuration
    /// </summary>
    internal sealed class AzureBlockBlobFileSystemConfigurationProvider : IConfigurationProvider
    {
        private readonly IConfiguration _configuration;

        [Inject]
        private AzureBlockBlobFileSystemConfigurationProvider(
            [Parameter(typeof(AzureStorageConnectionString))] string connectionString,
            IAzureBlobRetryPolicy retryPolicy)
        {
            _configuration = TangFactory.GetTang().NewConfigurationBuilder()
                .BindImplementation(GenericType<IFileSystem>.Class, GenericType<AzureBlockBlobFileSystem>.Class)
                .BindImplementation(typeof(IAzureBlobRetryPolicy), retryPolicy.GetType())
                .BindStringNamedParam<AzureStorageConnectionString>(connectionString)
                .BindSetEntry<EvaluatorConfigurationProviders, AzureBlockBlobFileSystemConfigurationProvider, IConfigurationProvider>()
                .Build();
        }

        public IConfiguration GetConfiguration()
        {
            return _configuration;
        }
    }
}