/* 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.Linq.Expressions;
using System.Runtime.Serialization;
using OpenSearch.Net.Utf8Json;

namespace OpenSearch.Client
{
	[InterfaceDataContract]
	[ReadAs(typeof(AutoDateHistogramAggregation))]
	public interface IAutoDateHistogramAggregation : IBucketAggregation
	{
		[DataMember(Name = "field")]
		Field Field { get; set; }

		[DataMember(Name = "buckets")]
		int? Buckets { get; set; }

		[DataMember(Name = "format")]
		string Format { get; set; }

		[DataMember(Name = "missing")]
		DateTime? Missing { get; set; }

		[DataMember(Name = "offset")]
		string Offset { get; set; }

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

		[DataMember(Name = "script")]
		IScript Script { get; set; }

		[DataMember(Name = "time_zone")]
		string TimeZone { get; set; }

		/// <summary>
		/// Specify the minimum rounding interval that should be used. This can make the collection process
		/// more efficient, as the aggregation will not attempt to round at any interval lower than this.
		/// </summary>
		[DataMember(Name = "minimum_interval")]
		MinimumInterval? MinimumInterval { get; set; }
	}

	public class AutoDateHistogramAggregation : BucketAggregationBase, IAutoDateHistogramAggregation
	{
		private string _format;

		internal AutoDateHistogramAggregation() { }

		public AutoDateHistogramAggregation(string name) : base(name) { }

		public Field Field { get; set; }

		public int? Buckets { get; set; }

		//see: https://github.com/elastic/elasticsearch/issues/9725
		public string Format
		{
			get => !string.IsNullOrEmpty(_format) &&
				!_format.Contains("date_optional_time") &&
				(Missing.HasValue)
					? _format + "||date_optional_time"
					: _format;
			set => _format = value;
		}

		public DateTime? Missing { get; set; }
		public string Offset { get; set; }
		public IDictionary<string, object> Params { get; set; }
		public IScript Script { get; set; }
		public string TimeZone { get; set; }

		public MinimumInterval? MinimumInterval { get; set; }

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

	public class AutoDateHistogramAggregationDescriptor<T>
		: BucketAggregationDescriptorBase<AutoDateHistogramAggregationDescriptor<T>, IAutoDateHistogramAggregation, T>
			, IAutoDateHistogramAggregation
		where T : class
	{
		private string _format;

		Field IAutoDateHistogramAggregation.Field { get; set; }

		int? IAutoDateHistogramAggregation.Buckets { get; set; }

		//see: https://github.com/elastic/elasticsearch/issues/9725
		string IAutoDateHistogramAggregation.Format
		{
			get => !string.IsNullOrEmpty(_format) &&
				!_format.Contains("date_optional_time") &&
				(Self.Missing.HasValue)
					? _format + "||date_optional_time"
					: _format;
			set => _format = value;
		}

		DateTime? IAutoDateHistogramAggregation.Missing { get; set; }

		string IAutoDateHistogramAggregation.Offset { get; set; }

		IDictionary<string, object> IAutoDateHistogramAggregation.Params { get; set; }

		IScript IAutoDateHistogramAggregation.Script { get; set; }

		string IAutoDateHistogramAggregation.TimeZone { get; set; }

		MinimumInterval? IAutoDateHistogramAggregation.MinimumInterval { get; set; }

		public AutoDateHistogramAggregationDescriptor<T> Field(Field field) => Assign(field, (a, v) => a.Field = v);

		public AutoDateHistogramAggregationDescriptor<T> Field<TValue>(Expression<Func<T, TValue>> field) => Assign(field, (a, v) => a.Field = v);

		public AutoDateHistogramAggregationDescriptor<T> Buckets(int? buckets) => Assign(buckets, (a, v) => a.Buckets = v);

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

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

		public AutoDateHistogramAggregationDescriptor<T> Format(string format) => Assign(format, (a, v) => a.Format = v);

		public AutoDateHistogramAggregationDescriptor<T> TimeZone(string timeZone) => Assign(timeZone, (a, v) => a.TimeZone = v);

		public AutoDateHistogramAggregationDescriptor<T> Offset(string offset) => Assign(offset, (a, v) => a.Offset = v);

		public AutoDateHistogramAggregationDescriptor<T> Missing(DateTime? missing) => Assign(missing, (a, v) => a.Missing = v);

		/// <inheritdoc cref="IAutoDateHistogramAggregation.MinimumInterval"/>
		public AutoDateHistogramAggregationDescriptor<T> MinimumInterval(MinimumInterval? minimumInterval) => Assign(minimumInterval, (a, v) => a.MinimumInterval = v);
	}
}