/* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*
*  Licensed to Elasticsearch B.V. under one or more contributor
*  license agreements. See the NOTICE file distributed with
*  this work for additional information regarding copyright
*  ownership. Elasticsearch B.V. licenses this file to you 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.Runtime.Serialization;
using OpenSearch.Net.Utf8Json;

namespace OpenSearch.Client
{
	[InterfaceDataContract]
	[ReadAs(typeof(ScriptedMetricAggregation))]
	public interface IScriptedMetricAggregation : IMetricAggregation
	{
		[DataMember(Name ="combine_script")]
		IScript CombineScript { get; set; }

		[DataMember(Name ="init_script")]
		IScript InitScript { get; set; }

		[DataMember(Name ="map_script")]
		IScript MapScript { get; set; }

		[DataMember(Name ="params")]
		IDictionary<string, object> Params { get; set; }

		[DataMember(Name ="reduce_script")]
		IScript ReduceScript { get; set; }
	}

	public class ScriptedMetricAggregation : MetricAggregationBase, IScriptedMetricAggregation
	{
		internal ScriptedMetricAggregation() { }

		public ScriptedMetricAggregation(string name) : base(name, null) { }

		public IScript CombineScript { get; set; }
		public IScript InitScript { get; set; }
		public IScript MapScript { get; set; }
		public IDictionary<string, object> Params { get; set; }
		public IScript ReduceScript { get; set; }

		internal override void WrapInContainer(AggregationContainer c) => c.ScriptedMetric = this;
	}

	public class ScriptedMetricAggregationDescriptor<T>
		: MetricAggregationDescriptorBase<ScriptedMetricAggregationDescriptor<T>, IScriptedMetricAggregation, T>
			, IScriptedMetricAggregation
		where T : class
	{
		IScript IScriptedMetricAggregation.CombineScript { get; set; }
		IScript IScriptedMetricAggregation.InitScript { get; set; }
		IScript IScriptedMetricAggregation.MapScript { get; set; }
		IDictionary<string, object> IScriptedMetricAggregation.Params { get; set; }
		IScript IScriptedMetricAggregation.ReduceScript { get; set; }

		public ScriptedMetricAggregationDescriptor<T> InitScript(string script) => Assign((InlineScript)script, (a, v) => a.InitScript = v);

		public ScriptedMetricAggregationDescriptor<T> InitScript(Func<ScriptDescriptor, IScript> scriptSelector) =>
			Assign(scriptSelector, (a, v) => a.InitScript = v?.Invoke(new ScriptDescriptor()));

		public ScriptedMetricAggregationDescriptor<T> MapScript(string script) => Assign((InlineScript)script, (a, v) => a.MapScript = v);

		public ScriptedMetricAggregationDescriptor<T> MapScript(Func<ScriptDescriptor, IScript> scriptSelector) =>
			Assign(scriptSelector, (a, v) => a.MapScript = v?.Invoke(new ScriptDescriptor()));

		public ScriptedMetricAggregationDescriptor<T> CombineScript(string script) => Assign((InlineScript)script, (a, v) => a.CombineScript = v);

		public ScriptedMetricAggregationDescriptor<T> CombineScript(Func<ScriptDescriptor, IScript> scriptSelector) =>
			Assign(scriptSelector, (a, v) => a.CombineScript = v?.Invoke(new ScriptDescriptor()));

		public ScriptedMetricAggregationDescriptor<T> ReduceScript(string script) => Assign((InlineScript)script, (a, v) => a.ReduceScript = v);

		public ScriptedMetricAggregationDescriptor<T> ReduceScript(Func<ScriptDescriptor, IScript> scriptSelector) =>
			Assign(scriptSelector, (a, v) => a.ReduceScript = v?.Invoke(new ScriptDescriptor()));

		public ScriptedMetricAggregationDescriptor<T>
			Params(Func<FluentDictionary<string, object>, FluentDictionary<string, object>> paramSelector) =>
			Assign(paramSelector, (a, v) => a.Params = v?.Invoke(new FluentDictionary<string, object>()));
	}
}