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

using FakeItEasy;
using Microsoft.Extensions.Caching.Memory;
using Microsoft.Extensions.Options;
using Squidex.Domain.Apps.Core.Contents;
using Squidex.Domain.Apps.Core.Schemas;
using Squidex.Domain.Apps.Core.Scripting;
using Squidex.Domain.Apps.Entities.Contents.Queries.Steps;
using Squidex.Domain.Apps.Entities.TestHelpers;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Json.Objects;
using Xunit;

namespace Squidex.Domain.Apps.Entities.Contents.Queries
{
    public class ScriptContentTests
    {
        private readonly IScriptEngine scriptEngine = A.Fake<IScriptEngine>();
        private readonly NamedId<DomainId> appId = NamedId.Of(DomainId.NewGuid(), "my-app");
        private readonly ScriptContent sut;

        public ScriptContentTests()
        {
            sut = new ScriptContent(scriptEngine);
        }

        [Fact]
        public async Task Should_not_call_script_engine_if_no_script_configured()
        {
            var ctx = new Context(Mocks.ApiUser(), Mocks.App(appId));

            var (provider, schemaId) = CreateSchema(
                queryPre: "my-pre-query");

            var content = new ContentEntity { Data = new ContentData(), SchemaId = schemaId };

            await sut.EnrichAsync(ctx, new[] { content }, provider, default);

            A.CallTo(() => scriptEngine.TransformAsync(A<DataScriptVars>._, A<string>._, ScriptOptions(), A<CancellationToken>._))
                .MustNotHaveHappened();
        }

        [Fact]
        public async Task Should_not_call_script_engine_for_frontend_user()
        {
            var ctx = new Context(Mocks.FrontendUser(), Mocks.App(appId));

            var (provider, schemaId) = CreateSchema(
                query: "my-query");

            var content = new ContentEntity { Data = new ContentData(), SchemaId = schemaId };

            await sut.EnrichAsync(ctx, new[] { content }, provider, default);

            A.CallTo(() => scriptEngine.TransformAsync(A<DataScriptVars>._, A<string>._, ScriptOptions(), A<CancellationToken>._))
                .MustNotHaveHappened();
        }

        [Fact]
        public async Task Should_call_script_engine_with_data()
        {
            var ctx = new Context(Mocks.ApiUser(), Mocks.App(appId));

            var oldData = new ContentData();

            var (provider, schemaId) = CreateSchema(
                query: "my-query");

            var content = new ContentEntity { Data = oldData, SchemaId = schemaId };

            A.CallTo(() => scriptEngine.TransformAsync(A<DataScriptVars>._, "my-query", ScriptOptions(), A<CancellationToken>._))
                .Returns(new ContentData());

            await sut.EnrichAsync(ctx, new[] { content }, provider, default);

            Assert.NotSame(oldData, content.Data);

            A.CallTo(() => scriptEngine.TransformAsync(
                    A<DataScriptVars>.That.Matches(x =>
                        Equals(x["user"], ctx.User) &&
                        Equals(x["data"], oldData) &&
                        Equals(x["contentId"], content.Id)),
                    "my-query",
                    ScriptOptions(), A<CancellationToken>._))
                .MustHaveHappened();
        }

        [Fact]
        public async Task Should_make_test_with_pre_query_script()
        {
            var ctx = new Context(Mocks.ApiUser(), Mocks.App(appId));

            var (provider, id) = CreateSchema(
                query: @"
                    ctx.data.test = { iv: ctx.custom };
                    replace()",
                queryPre: "ctx.custom = 123;");

            var content = new ContentEntity { Data = new ContentData(), SchemaId = id };

            var realScriptEngine =
                new JintScriptEngine(new MemoryCache(Options.Create(new MemoryCacheOptions())),
                    Options.Create(new JintScriptOptions
                    {
                        TimeoutScript = TimeSpan.FromSeconds(20),
                        TimeoutExecution = TimeSpan.FromSeconds(100)
                    }));

            var sut2 = new ScriptContent(realScriptEngine);

            await sut2.EnrichAsync(ctx, new[] { content }, provider, default);

            Assert.Equal(JsonValue.Create(123), content.Data["test"]!["iv"]);
        }

        private (ProvideSchema, NamedId<DomainId>) CreateSchema(string? query = null, string? queryPre = null)
        {
            var id = NamedId.Of(DomainId.NewGuid(), "my-schema");

            return (_ =>
            {
                var schemaDef =
                    new Schema(id.Name)
                        .SetScripts(new SchemaScripts
                        {
                            Query = query,
                            QueryPre = queryPre
                        });

                return Task.FromResult((Mocks.Schema(appId, id, schemaDef), ResolvedComponents.Empty));
            }, id);
        }

        private static ScriptOptions ScriptOptions()
        {
            return A<ScriptOptions>.That.Matches(x => x.AsContext);
        }
    }
}