using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.IO;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Configuration;
using MediaBrowser.Model.Serialization;
using ServiceStack;
using System.Collections.Generic;
using System.Linq;

namespace MediaBrowser.Api
{
    /// <summary>
    /// Class GetConfiguration
    /// </summary>
    [Route("/System/Configuration", "GET")]
    [Api(("Gets application configuration"))]
    public class GetConfiguration : IReturn<ServerConfiguration>
    {

    }

    /// <summary>
    /// Class UpdateConfiguration
    /// </summary>
    [Route("/System/Configuration", "POST")]
    [Api(("Updates application configuration"))]
    public class UpdateConfiguration : ServerConfiguration, IReturnVoid
    {
    }

    [Route("/System/Configuration/MetadataOptions/Default", "GET")]
    [Api(("Gets a default MetadataOptions object"))]
    public class GetDefaultMetadataOptions : IReturn<MetadataOptions>
    {

    }

    [Route("/System/Configuration/MetadataPlugins", "GET")]
    [Api(("Gets all available metadata plugins"))]
    public class GetMetadataPlugins : IReturn<List<MetadataPluginSummary>>
    {

    }

    public class ConfigurationService : BaseApiService
    {
        /// <summary>
        /// The _json serializer
        /// </summary>
        private readonly IJsonSerializer _jsonSerializer;

        /// <summary>
        /// The _configuration manager
        /// </summary>
        private readonly IServerConfigurationManager _configurationManager;

        private readonly IFileSystem _fileSystem;
        private readonly IProviderManager _providerManager;

        public ConfigurationService(IJsonSerializer jsonSerializer, IServerConfigurationManager configurationManager, IFileSystem fileSystem, IProviderManager providerManager)
        {
            _jsonSerializer = jsonSerializer;
            _configurationManager = configurationManager;
            _fileSystem = fileSystem;
            _providerManager = providerManager;
        }

        /// <summary>
        /// Gets the specified request.
        /// </summary>
        /// <param name="request">The request.</param>
        /// <returns>System.Object.</returns>
        public object Get(GetConfiguration request)
        {
            var configPath = _configurationManager.ApplicationPaths.SystemConfigurationFilePath;

            var dateModified = _fileSystem.GetLastWriteTimeUtc(configPath);

            var cacheKey = (configPath + dateModified.Ticks).GetMD5();

            return ToOptimizedResultUsingCache(cacheKey, dateModified, null, () => _configurationManager.Configuration);
        }

        /// <summary>
        /// Posts the specified configuraiton.
        /// </summary>
        /// <param name="request">The request.</param>
        public void Post(UpdateConfiguration request)
        {
            // Silly, but we need to serialize and deserialize or the XmlSerializer will write the xml with an element name of UpdateConfiguration

            var json = _jsonSerializer.SerializeToString(request);

            var config = _jsonSerializer.DeserializeFromString<ServerConfiguration>(json);

            _configurationManager.ReplaceConfiguration(config);
        }

        public object Get(GetDefaultMetadataOptions request)
        {
            return ToOptimizedSerializedResultUsingCache(new MetadataOptions());
        }

        public object Get(GetMetadataPlugins request)
        {
            return ToOptimizedSerializedResultUsingCache(_providerManager.GetAllMetadataPlugins().ToList());
        }
    }
}