/* 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.Specification.IngestApi
{
	/// <summary>
	/// The ingest attachment plugin lets OpenSearch extract file attachments in common formats
	/// (such as PPT, XLS, and PDF) by using the Apache text extraction library Tika.
	/// You can use the ingest attachment plugin as a replacement for the mapper attachment plugin.
	/// </summary>
	/// <remarks>
	/// Requires the Ingest Attachment Processor Plugin to be installed on the cluster.
	/// </remarks>
	[InterfaceDataContract]
	public interface IAttachmentProcessor : IProcessor
	{
		/// <summary> The field to get the base64 encoded field from.</summary>
		[DataMember(Name ="field")]
		Field Field { get; set; }


		/// <summary> If `true` and `field` does not exist, the processor quietly exits without modifying the document.</summary>
		[DataMember(Name ="ignore_missing")]
		bool? IgnoreMissing { get; set; }

		/// <summary>
		/// The number of chars being used for extraction to prevent huge fields. Use -1 for no limit.
		/// Defaults to 100000.
		/// </summary>
		[DataMember(Name ="indexed_chars")]
		long? IndexedCharacters { get; set; }

		/// <summary> Field name from which you can overwrite the number of chars being used for extraction.</summary>
		[DataMember(Name ="indexed_chars_field")]
		Field IndexedCharactersField { get; set; }

		/// <summary>
		/// Properties to select to be stored. Can be content, title, name, author,
		/// keywords, date, content_type, content_length, language. Defaults to all.
		/// </summary>
		[DataMember(Name ="properties")]
		IEnumerable<string> Properties { get; set; }

		/// <summary> The field that will hold the attachment information.</summary>
		[DataMember(Name ="target_field")]
		Field TargetField { get; set; }

		/// <summary> The field containing the name of the resource to decode.
		/// If specified, the processor passes this resource name to the underlying
		/// Tika library to enable 'Resource Name Based Detection'.</summary>
		[DataMember(Name = "resource_name")]
		Field ResourceName { get; set; }
	}

	/// <inheritdoc cref="IAttachmentProcessor" />
	public class AttachmentProcessor : ProcessorBase, IAttachmentProcessor
	{
		/// <inheritdoc cref="IAttachmentProcessor.Field" />
		public Field Field { get; set; }

		/// <inheritdoc />
		/// <inheritdoc cref="IAttachmentProcessor.IgnoreMissing" />
		public bool? IgnoreMissing { get; set; }

		/// <inheritdoc cref="IAttachmentProcessor.IndexedCharacters" />
		public long? IndexedCharacters { get; set; }

		/// <inheritdoc cref="IAttachmentProcessor.IndexedCharactersField" />
		public Field IndexedCharactersField { get; set; }

		/// <inheritdoc cref="IAttachmentProcessor.Properties" />
		public IEnumerable<string> Properties { get; set; }

		/// <inheritdoc cref="IAttachmentProcessor.TargetField" />
		public Field TargetField { get; set; }

		/// <inheritdoc cref="IAttachmentProcessor.ResourceName" />
		public Field ResourceName { get; set; }

		protected override string Name => "attachment";
	}

	/// <inheritdoc cref="IAttachmentProcessor" />
	public class AttachmentProcessorDescriptor<T>
		: ProcessorDescriptorBase<AttachmentProcessorDescriptor<T>, IAttachmentProcessor>, IAttachmentProcessor
		where T : class
	{
		protected override string Name => "attachment";

		Field IAttachmentProcessor.Field { get; set; }
		bool? IAttachmentProcessor.IgnoreMissing { get; set; }
		long? IAttachmentProcessor.IndexedCharacters { get; set; }
		Field IAttachmentProcessor.IndexedCharactersField { get; set; }
		IEnumerable<string> IAttachmentProcessor.Properties { get; set; }
		Field IAttachmentProcessor.TargetField { get; set; }
		Field IAttachmentProcessor.ResourceName { get; set; }

		/// <inheritdoc cref="IAttachmentProcessor.Field" />
		public AttachmentProcessorDescriptor<T> Field(Field field) => Assign(field, (a, v) => a.Field = v);

		/// <inheritdoc cref="IAttachmentProcessor.Field" />
		public AttachmentProcessorDescriptor<T> Field<TValue>(Expression<Func<T, TValue>> objectPath) => Assign(objectPath, (a, v) => a.Field = v);

		/// <inheritdoc cref="IAttachmentProcessor.TargetField" />
		public AttachmentProcessorDescriptor<T> TargetField(Field field) => Assign(field, (a, v) => a.TargetField = v);

		/// <inheritdoc cref="IAttachmentProcessor.TargetField" />
		public AttachmentProcessorDescriptor<T> TargetField<TValue>(Expression<Func<T, TValue>> objectPath) => Assign(objectPath, (a, v) => a.TargetField = v);

		/// <inheritdoc cref="IAttachmentProcessor.IndexedCharacters" />
		public AttachmentProcessorDescriptor<T> IndexedCharacters(long? indexedCharacters) => Assign(indexedCharacters, (a, v) => a.IndexedCharacters = v);

		/// <inheritdoc cref="IAttachmentProcessor.IndexedCharactersField" />
		public AttachmentProcessorDescriptor<T> IndexedCharactersField(Field field) => Assign(field, (a, v) => a.IndexedCharactersField = v);

		/// <inheritdoc cref="IAttachmentProcessor.IndexedCharactersField" />
		public AttachmentProcessorDescriptor<T> IndexedCharactersField<TValue>(Expression<Func<T, TValue>> objectPath) =>
			Assign(objectPath, (a, v) => a.IndexedCharactersField = v);

		/// <inheritdoc cref="IAttachmentProcessor.IgnoreMissing" />
		public AttachmentProcessorDescriptor<T> IgnoreMissing(bool? ignoreMissing = true) => Assign(ignoreMissing, (a, v) => a.IgnoreMissing = v);

		/// <inheritdoc cref="IAttachmentProcessor.Properties" />
		public AttachmentProcessorDescriptor<T> Properties(IEnumerable<string> properties) => Assign(properties, (a, v) => a.Properties = v);

		/// <inheritdoc cref="IAttachmentProcessor.Properties" />
		public AttachmentProcessorDescriptor<T> Properties(params string[] properties) => Assign(properties, (a, v) => a.Properties = v);

		/// <inheritdoc cref="IAttachmentProcessor.ResourceName" />
		public AttachmentProcessorDescriptor<T> ResourceName(Field field) => Assign(field, (a, v) => a.ResourceName = v);

		/// <inheritdoc cref="IAttachmentProcessor.TargetField" />
		public AttachmentProcessorDescriptor<T> ResourceName<TValue>(Expression<Func<T, TValue>> objectPath) => Assign(objectPath, (a, v) => a.ResourceName = v);
	}
}