// ==========================================================================
//  Squidex Headless CMS
// ==========================================================================
//  Copyright (c) Squidex UG (haftungsbeschraenkt)
//  All rights reserved. Licensed under the MIT license.
// ==========================================================================

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Squidex.Domain.Apps.Entities.Contents.Text;
using Squidex.Hosting;
using Squidex.Hosting.Configuration;
using Squidex.Infrastructure.Plugins;

namespace Squidex.Extensions.Text.ElasticSearch
{
    public sealed class ElasticSearchTextPlugin : IPlugin
    {
        public void ConfigureServices(IServiceCollection services, IConfiguration config)
        {
            var fullTextType = config.GetValue<string>("fullText:type");

            if (string.Equals(fullTextType, "elastic", StringComparison.OrdinalIgnoreCase))
            {
                var elasticConfiguration = config.GetValue<string>("fullText:elastic:configuration");

                if (string.IsNullOrWhiteSpace(elasticConfiguration))
                {
                    var error = new ConfigurationError("Value is required.", "fullText:elastic:configuration");

                    throw new ConfigurationException(error);
                }

                var indexName = config.GetValue<string>("fullText:elastic:indexName");

                if (string.IsNullOrWhiteSpace(indexName))
                {
                    indexName = "squidex-index";
                }

                services.AddSingleton(
                    c => new ElasticSearchTextIndex(elasticConfiguration, indexName));

                services.AddSingleton<ITextIndex>(
                    c => c.GetRequiredService<ElasticSearchTextIndex>());

                services.AddSingleton<IInitializable>(
                    c => c.GetRequiredService<ElasticSearchTextIndex>());
            }
        }
    }
}