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

using Squidex.Domain.Apps.Core.Apps;
using Squidex.Domain.Apps.Core.Contents;
using Squidex.Domain.Apps.Core.ConvertContent;
using Squidex.Domain.Apps.Core.Schemas;
using Squidex.Domain.Apps.Core.TestHelpers;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Json.Objects;
using Xunit;

namespace Squidex.Domain.Apps.Core.Operations.ConvertContent
{
    public class FieldConvertersTests
    {
        private readonly LanguagesConfig languagesConfig = LanguagesConfig.English.Set(Language.DE);

        private static IEnumerable<object?[]> InvalidValues()
        {
            yield return new object?[] { JsonValue.Null };
            yield return new object?[] { JsonValue.Create(false) }; // Undefined
        }

        [Fact]
        public void Should_not_change_data_if_all_field_values_have_correct_type()
        {
            var field1 = Fields.Number(1, "number1", Partitioning.Language);
            var field2 = Fields.Number(2, "number2", Partitioning.Language);

            var schema =
                new Schema("my-schema")
                    .AddField(field1)
                    .AddField(field2);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", 1))
                    .AddField(field2.Name,
                        new ContentFieldData()
                            .AddLocalized("en", JsonValue.Null)
                            .AddLocalized("de", 1));

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ExcludeChangedTypes(TestUtils.DefaultSerializer))
                    .Convert(source);

            var expected = source;

            Assert.Equal(expected, result);
        }

        [Fact]
        public void Should_remove_fields_with_invalid_data()
        {
            var field1 = Fields.Number(1, "number1", Partitioning.Language);
            var field2 = Fields.Number(2, "number2", Partitioning.Language);

            var schema =
                new Schema("my-schema")
                    .AddField(field1)
                    .AddField(field2);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", 1))
                    .AddField(field2.Name,
                        new ContentFieldData()
                            .AddLocalized("en", "2")
                            .AddLocalized("de", 2));

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ExcludeChangedTypes(TestUtils.DefaultSerializer))
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", 1));

            Assert.Equal(expected, result);
        }

        [Fact]
        public void Should_remove_hidden_fields()
        {
            var field1 = Fields.Number(1, "number1", Partitioning.Language);
            var field2 = Fields.Number(2, "number2", Partitioning.Language).Hide();

            var schema =
                new Schema("my-schema")
                    .AddField(field1)
                    .AddField(field2);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", 1))
                    .AddField(field2.Name,
                        new ContentFieldData()
                            .AddLocalized("en", JsonValue.Null)
                            .AddLocalized("de", 1));

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(ExcludeHidden.Instance)
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", 1));

            Assert.Equal(expected, result);
        }

        [Fact]
        public void Should_not_remove_hidden_fields()
        {
            var field1 = Fields.Number(1, "number1", Partitioning.Language);
            var field2 = Fields.Number(2, "number2", Partitioning.Language);

            var schema =
                new Schema("my-schema")
                    .AddField(field1)
                    .AddField(field2)
                    .HideField(2);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", 1))
                    .AddField(field2.Name,
                        new ContentFieldData()
                            .AddLocalized("en", "2"));

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ExcludeChangedTypes(TestUtils.DefaultSerializer))
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", 1));

            Assert.Equal(expected, result);
        }

        [Fact]
        public void Should_remove_old_languages()
        {
            var field1 = Fields.String(1, "string1", Partitioning.Language);

            var schema =
                new Schema("my-schema")
                    .AddField(field1);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", "EN")
                            .AddLocalized("de", "DE")
                            .AddLocalized("it", "IT"));

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ResolveLanguages(languagesConfig))
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", "EN")
                            .AddLocalized("de", "DE"));

            Assert.Equal(expected, result);
        }

        [Fact]
        public void Should_remove_unwanted_languages()
        {
            var field1 = Fields.String(1, "string1", Partitioning.Language);

            var schema =
                new Schema("my-schema")
                    .AddField(field1);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", "EN")
                            .AddLocalized("de", "DE")
                            .AddLocalized("it", "IT"));

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ResolveLanguages(languagesConfig, true, new[] { Language.DE }))
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("de", "DE"));

            Assert.Equal(expected, result);
        }

        [Theory]
        [MemberData(nameof(InvalidValues))]
        public void Should_resolve_master_language_from_invariant(JsonValue value)
        {
            var field1 = Fields.String(1, "string", Partitioning.Language);

            var schema =
                new Schema("my-schema")
                    .AddField(field1);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("iv", "A")
                            .AddLocalized("it", "B"));

            if (value != false)
            {
                source[field1.Name]!["en"] = value!;
            }

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ResolveLanguages(languagesConfig))
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", "A"));

            Assert.Equal(expected, result);
        }

        [Theory]
        [MemberData(nameof(InvalidValues))]
        public void Should_not_resolve_master_language_if_not_found(JsonValue value)
        {
            var field1 = Fields.String(1, "string", Partitioning.Language);

            var schema =
                new Schema("my-schema")
                    .AddField(field1);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("es", "A")
                            .AddLocalized("it", "B"));

            if (value != false)
            {
                source[field1.Name]!["en"] = value;
            }

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ResolveLanguages(languagesConfig))
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData());

            if (value != false)
            {
                expected[field1.Name]!["en"] = value;
            }

            Assert.Equal(expected, result);
        }

        [Fact]
        public void Should_keep_invariant()
        {
            var field1 = Fields.String(1, "string", Partitioning.Invariant);

            var schema =
                new Schema("my-schema")
                    .AddField(field1);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddInvariant("A"));

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ResolveLanguages(languagesConfig))
                    .Convert(source);

            var expected = source;

            Assert.Equal(expected, result);
        }

        [Theory]
        [MemberData(nameof(InvalidValues))]
        public void Should_resolve_invariant_from_master_language(JsonValue value)
        {
            var field1 = Fields.String(1, "string", Partitioning.Invariant);

            var schema =
                new Schema("my-schema")
                    .AddField(field1);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("de", "DE")
                            .AddLocalized("en", "EN"));

            if (value != false)
            {
                source[field1.Name]![InvariantPartitioning.Key] = value;
            }

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ResolveInvariant(languagesConfig))
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddInvariant("EN"));

            Assert.Equal(expected, result);
        }

        [Theory]
        [MemberData(nameof(InvalidValues))]
        public void Should_resolve_invariant_from_first_language(JsonValue value)
        {
            var field1 = Fields.String(1, "string", Partitioning.Invariant);

            var schema =
                new Schema("my-schema")
                    .AddField(field1);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("de", "DE")
                            .AddLocalized("it", "IT"));

            if (value != false)
            {
                source[field1.Name]![InvariantPartitioning.Key] = value;
            }

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ResolveInvariant(languagesConfig))
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddInvariant("DE"));

            Assert.Equal(expected, result);
        }

        [Fact]
        public void Should_not_resolve_invariant_if_not_found()
        {
            var field1 = Fields.String(1, "string", Partitioning.Invariant);

            var schema =
                new Schema("my-schema")
                    .AddField(field1);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData());

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ResolveLanguages(languagesConfig))
                    .Convert(source);

            var expected = source;

            Assert.Equal(expected, result);
        }

        [Theory]
        [MemberData(nameof(InvalidValues))]
        public void Should_resolve_from_fallback_language_if_found(JsonValue value)
        {
            var field1 = Fields.String(1, "string", Partitioning.Language);

            var schema =
                new Schema("my-schema")
                    .AddField(field1);

            var config =
                LanguagesConfig.English
                    .Set(Language.DE)
                    .Set(Language.IT)
                    .Set(Language.ES, false, Language.IT);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", "EN")
                            .AddLocalized("it", "IT"));

            if (value != false)
            {
                source[field1.Name]!["de"] = value!;
            }

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ResolveLanguages(config))
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", "EN")
                            .AddLocalized("it", "IT")
                            .AddLocalized("es", "IT")
                            .AddLocalized("de", "EN"));

            Assert.Equal(expected, result);
        }

        [Fact]
        public void Should_return_master_language_if_languages_to_filter_are_invalid()
        {
            var field1 = Fields.String(1, "string", Partitioning.Language);

            var schema =
                new Schema("my-schema")
                    .AddField(field1);

            var source =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", "EN")
                            .AddLocalized("de", "DE"));

            var result =
                new ContentConverter(ResolvedComponents.Empty, schema)
                    .Add(new ResolveLanguages(languagesConfig, true, Language.IT))
                    .Convert(source);

            var expected =
                new ContentData()
                    .AddField(field1.Name,
                        new ContentFieldData()
                            .AddLocalized("en", "EN"));

            Assert.Equal(expected, result);
        }

        [Fact]
        public void Should_return_same_values_if_resolving_fallback_languages_from_invariant_field()
        {
            var field = Fields.String(1, "string", Partitioning.Invariant);

            var source = new ContentFieldData();

            var result =
                new ResolveLanguages(languagesConfig)
                    .ConvertFieldAfter(field, source);

            Assert.Same(source, result);
        }

        [Fact]
        public void Should_return_same_values_if_filtered_languages_is_empty()
        {
            var field = Fields.String(1, "string", Partitioning.Language);

            var source = new ContentFieldData();

            var result =
                new ResolveLanguages(languagesConfig, true, Array.Empty<Language>())
                    .ConvertFieldAfter(field, source);

            Assert.Same(source, result);
        }

        [Fact]
        public void Should_return_same_values_if_filtering_languages_from_invariant_field()
        {
            var field = Fields.String(1, "string", Partitioning.Invariant);

            var source = new ContentFieldData();

            var result =
                new ResolveLanguages(languagesConfig)
                    .ConvertFieldAfter(field, source);

            Assert.Same(source, result);
        }

        /*
        [Fact]
        public void Should_add_schema_name_to_component()
        {
            var field = Fields.Component(1, "component", Partitioning.Invariant);

            var componentId = DomainId.NewGuid();
            var component = new Schema("my-component");
            var components = new ResolvedComponents(new Dictionary<DomainId, Schema>
            {
                [componentId] = component
            });

            var source =
                new ContentFieldData()
                    .AddInvariant(
                        new JsonObject()
                            .Add(Component.Discriminator, componentId));

            var expected =
                new ContentFieldData()
                    .AddInvariant(
                        new JsonObject()
                            .Add(Component.Discriminator, componentId)
                            .Add("schemaName", component.Name));

            var result = FieldConverters.AddSchemaName(components)(data, field);

            var expected = new ContentFieldData();

            Assert.Equal(expected, result);
        }*/
    }
}