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

using Squidex.Domain.Apps.Core.Contents;
using Xunit;

namespace Squidex.Domain.Apps.Core.Model.Contents
{
    public class ContentDataTests
    {
        [Fact]
        public void Should_return_same_content_if_merging_same_references()
        {
            var source =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddInvariant(1))
                    .AddField("field2",
                        new ContentFieldData()
                            .AddLocalized("de", 2));

            var actual = source.MergeInto(source);

            Assert.Same(source, actual);
        }

        [Fact]
        public void Should_merge_two_name_models()
        {
            var lhs =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddInvariant(1))
                    .AddField("field2",
                        new ContentFieldData()
                            .AddLocalized("de", 2)
                            .AddLocalized("it", 2));

            var rhs =
                new ContentData()
                    .AddField("field2",
                        new ContentFieldData()
                            .AddLocalized("it", 3)
                            .AddLocalized("en", 3))
                    .AddField("field3",
                        new ContentFieldData()
                            .AddInvariant(4));

            var expected =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddInvariant(1))
                    .AddField("field2",
                        new ContentFieldData()
                            .AddLocalized("it", 2)
                            .AddLocalized("de", 2)
                            .AddLocalized("en", 3))
                    .AddField("field3",
                        new ContentFieldData()
                            .AddInvariant(4));

            var actual = lhs.MergeInto(rhs);

            Assert.Equal(expected, actual);
            Assert.NotSame(expected, rhs);
            Assert.NotSame(expected, lhs);
        }

        [Fact]
        public void Should_be_equal_if_data_have_same_structure()
        {
            var lhs =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddInvariant(2))
                    .AddField("field2",
                        new ContentFieldData()
                            .AddInvariant(2));

            var rhs =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddInvariant(2))
                    .AddField("field2",
                        new ContentFieldData()
                            .AddInvariant(2));

            Assert.True(lhs.Equals(rhs));
            Assert.True(lhs.Equals((object)rhs));
            Assert.Equal(lhs.GetHashCode(), rhs.GetHashCode());
        }

        [Fact]
        public void Should_not_be_equal_if_data_have_not_same_structure()
        {
            var lhs =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddInvariant(2))
                    .AddField("field2",
                        new ContentFieldData()
                            .AddInvariant(2));

            var rhs =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddLocalized("en", 2))
                    .AddField("field3",
                        new ContentFieldData()
                            .AddInvariant(2));

            Assert.False(lhs.Equals(rhs));
            Assert.False(lhs.Equals((object)rhs));
            Assert.NotEqual(lhs.GetHashCode(), rhs.GetHashCode());
        }

        [Fact]
        public void Should_be_equal_fields_if_they_have_same_value()
        {
            var lhs =
                new ContentFieldData()
                    .AddInvariant(2);

            var rhs =
                new ContentFieldData()
                    .AddInvariant(2);

            Assert.True(lhs.Equals(rhs));
            Assert.True(lhs.Equals((object)rhs));
            Assert.Equal(lhs.GetHashCode(), rhs.GetHashCode());
        }

        [Fact]
        public void Should_clone_named_value_and_also_children()
        {
            var source = new ContentData
            {
                ["field1"] = new ContentFieldData(),
                ["field2"] = new ContentFieldData()
            };

            var clone = source.Clone();

            Assert.NotSame(source, clone);

            foreach (var (key, value) in clone)
            {
                Assert.NotSame(value, source[key]);
            }
        }

        [Fact]
        public void Should_copy_fields_from_other_data_if_they_are_equal()
        {
            var oldData =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddInvariant(1))
                    .AddField("field2",
                        new ContentFieldData()
                            .AddInvariant(2));

            var newData =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddInvariant(1))
                    .AddField("field2",
                        new ContentFieldData()
                            .AddInvariant(3));

            newData.UseSameFields(oldData);

            Assert.Same(newData["field1"], oldData["field1"]);
            Assert.NotSame(newData["field2"], oldData["field2"]);
        }

        [Fact]
        public void Should_copy_field_values_from_other_data_if_they_are_equal()
        {
            var oldData =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddLocalized("en", 1)
                            .AddLocalized("de", 2));
            var newData =
                new ContentData()
                    .AddField("field1",
                        new ContentFieldData()
                            .AddLocalized("en", 1)
                            .AddLocalized("de", 3));

            newData.UseSameFields(oldData);

            Assert.Same(newData["field1"]!["en"].Value, oldData["field1"]!["en"].Value);
            Assert.NotSame(newData["field1"]!["de"].Value, oldData["field1"]!["de"].Value);
            Assert.NotSame(newData["field1"], oldData["field1"]);
        }
    }
}