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

using System;
using System.Threading.Tasks;
using FakeItEasy;
using FluentAssertions;
using Squidex.Infrastructure.Log;
using Xunit;

namespace Squidex.Domain.Apps.Entities.Search
{
    public class SearchManagerTests
    {
        private readonly ISearchSource source1 = A.Fake<ISearchSource>();
        private readonly ISearchSource source2 = A.Fake<ISearchSource>();
        private readonly ISemanticLog log = A.Fake<ISemanticLog>();
        private readonly Context requestContext = Context.Anonymous();
        private readonly SearchManager sut;

        public SearchManagerTests()
        {
            sut = new SearchManager(new[] { source1, source2 }, log);
        }

        [Fact]
        public async Task Should_not_call_sources_and_return_empty_if_query_is_empty()
        {
            var result = await sut.SearchAsync(string.Empty, requestContext);

            Assert.Empty(result);

            A.CallTo(() => source1.SearchAsync(A<string>._, A<Context>._))
                .MustNotHaveHappened();

            A.CallTo(() => source2.SearchAsync(A<string>._, A<Context>._))
                .MustNotHaveHappened();
        }

        [Fact]
        public async Task Should_not_call_sources_and_return_empty_if_is_too_short()
        {
            var result = await sut.SearchAsync("11", requestContext);

            Assert.Empty(result);

            A.CallTo(() => source1.SearchAsync(A<string>._, A<Context>._))
                .MustNotHaveHappened();

            A.CallTo(() => source2.SearchAsync(A<string>._, A<Context>._))
                .MustNotHaveHappened();
        }

        [Fact]
        public async Task Should_aggregate_results_from_all_sources()
        {
            var result1 = new SearchResults().Add("Name1", SearchResultType.Setting, "Url1");
            var result2 = new SearchResults().Add("Name2", SearchResultType.Setting, "Url2");

            var query = "a query";

            A.CallTo(() => source1.SearchAsync(query, requestContext))
                .Returns(result1);

            A.CallTo(() => source2.SearchAsync(query, requestContext))
                .Returns(result2);

            var result = await sut.SearchAsync(query, requestContext);

            result.Should().BeEquivalentTo(
                new SearchResults()
                    .Add("Name1", SearchResultType.Setting, "Url1")
                    .Add("Name2", SearchResultType.Setting, "Url2"));
        }

        [Fact]
        public async Task Should_ignore_exception_from_source()
        {
            var result2 = new SearchResults().Add("Name2", SearchResultType.Setting, "Url2");

            var query = "a query";

            A.CallTo(() => source1.SearchAsync(query, requestContext))
                .Throws(new InvalidOperationException());

            A.CallTo(() => source2.SearchAsync(query, requestContext))
                .Returns(result2);

            var result = await sut.SearchAsync(query, requestContext);

            result.Should().BeEquivalentTo(result2);

            A.CallTo(() => log.Log<string>(A<SemanticLogLevel>._, A<string>._, A<Exception?>._, A<LogFormatter<string>>._!))
                .MustHaveHappened();
        }
    }
}