// ==========================================================================
//  SchemaTests.cs
//  Squidex Headless CMS
// ==========================================================================
//  Copyright (c) Squidex Group
//  All rights reserved.
// ==========================================================================

using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using Moq;
using Newtonsoft.Json.Linq;
using NJsonSchema;
using Squidex.Infrastructure;
using Xunit;

namespace Squidex.Core.Schemas
{
    public class SchemaTests
    {
        private Schema sut = Schema.Create("my-name", new SchemaProperties());

        private sealed class InvalidProperties : FieldProperties
        {
            public override JToken GetDefaultValue()
            {
                return null;
            }

            protected override IEnumerable<ValidationError> ValidateCore()
            {
                yield break;
            }
        }

        [Fact]
        public void Should_instantiate_field()
        {
            var properties = new SchemaProperties { Hints = "my-hint", Label = "my-label" };

            var schema = Schema.Create("my-name", properties);

            Assert.Equal("my-name", schema.Name);
            Assert.Equal(properties, schema.Properties);
        }

        [Fact]
        public void Should_throw_if_creating_schema_with_invalid_name()
        {
            Assert.Throws<ValidationException>(() => Schema.Create("Invalid Name", new SchemaProperties()));
        }

        [Fact]
        public void Should_update_schema()
        {
            var properties = new SchemaProperties { Hints = "my-hint", Label = "my-label" };

            sut = sut.Update(properties);
            
            Assert.Equal(properties, sut.Properties);
        }
        
        [Fact]
        public void Should_add_field()
        {
            var field = AddField();

            Assert.Equal(field, sut.FieldsById[1]);
        }

        [Fact]
        public void Should_throw_if_adding_field_with_name_that_already_exists()
        {
            AddField();

            Assert.Throws<ValidationException>(() => sut.AddOrUpdateField(new NumberField(2, "my-field", new NumberFieldProperties())));
        }

        [Fact]
        public void Should_hide_field()
        {
            AddField();

            sut = sut.HideField(1);
            sut = sut.HideField(1);

            Assert.True(sut.FieldsById[1].IsHidden);
        }

        [Fact]
        public void Should_throw_if_field_to_hide_does_not_exist()
        {
            Assert.Throws<DomainObjectNotFoundException>(() => sut.HideField(1));
        }

        [Fact]
        public void Should_show_field()
        {
            AddField();

            sut = sut.HideField(1);
            sut = sut.ShowField(1);
            sut = sut.ShowField(1);

            Assert.False(sut.FieldsById[1].IsHidden);
        }

        [Fact]
        public void Should_throw_if_field_to_show_does_not_exist()
        {
            Assert.Throws<DomainObjectNotFoundException>(() => sut.ShowField(2));
        }

        [Fact]
        public void Should_disable_field()
        {
            AddField();

            sut = sut.DisableField(1);
            sut = sut.DisableField(1);

            Assert.True(sut.FieldsById[1].IsDisabled);
        }

        [Fact]
        public void Should_throw_if_field_to_disable_does_not_exist()
        {
            Assert.Throws<DomainObjectNotFoundException>(() => sut.DisableField(1));
        }

        [Fact]
        public void Should_enable_field()
        {
            AddField();

            sut = sut.DisableField(1);
            sut = sut.EnableField(1);
            sut = sut.EnableField(1);

            Assert.False(sut.FieldsById[1].IsDisabled);
        }

        [Fact]
        public void Should_throw_if_field_to_enable_does_not_exist()
        {
            Assert.Throws<DomainObjectNotFoundException>(() => sut.EnableField(1));
        }

        [Fact]
        public void Should_rename_field()
        {
            AddField();

            sut = sut.RenameField(1, "new-name");

            Assert.Equal("new-name", sut.FieldsById[1].Name);
        }

        [Fact]
        public void Should_throw_if_new_field_already_exists()
        {
            AddField();

            sut = sut.AddOrUpdateField(new NumberField(2, "other-field", new NumberFieldProperties()));

            Assert.Throws<ValidationException>(() => sut.RenameField(2, "my-field"));
        }

        [Fact]
        public void Should_throw_if_new_field_name_is_not_valid()
        {
            AddField();

            Assert.Throws<ValidationException>(() => sut.RenameField(1, "new name"));
        }

        [Fact]
        public void Should_throw_if_field_to_rename_does_not_exist()
        {
            Assert.Throws<DomainObjectNotFoundException>(() => sut.RenameField(1, "new-name"));
        }

        [Fact]
        public void Should_delete_field()
        {
            AddField();

            sut = sut.DeleteField(1);

            Assert.Equal(0, sut.FieldsById.Count);
        }

        [Fact]
        public void Should_not_throw_if_field_to_delete_does_not_exist()
        {
            sut.DeleteField(1);
        }

        [Fact]
        public void Should_update_field()
        {
            AddField();

            sut = sut.UpdateField(1, new NumberFieldProperties { Hints = "my-hints" });

            Assert.Equal("my-hints", sut.FieldsById[1].RawProperties.Hints);
        }

        [Fact]
        public void Should_throw_if_updating_field_with_invalid_property_type()
        {
            AddField();

            Assert.Throws<ArgumentException>(() => sut.UpdateField(1, new InvalidProperties()));
        }

        [Fact]
        public void Should_throw_if_field_to_update_does_not_exist()
        {
            Assert.Throws<DomainObjectNotFoundException>(() => sut.UpdateField(1, new NumberFieldProperties()));
        }

        [Fact]
        public void Should_publish_schema()
        {
            sut = sut.Publish();

            Assert.True(sut.IsPublished);
        }

        [Fact]
        public void Should_throw_if_schema_is_already_published()
        {
            sut = sut.Publish();

            Assert.Throws<DomainException>(() => sut.Publish());
        }

        [Fact]
        public void Should_unpublish_schema()
        {
            sut = sut.Publish();
            sut = sut.Unpublish();

            Assert.False(sut.IsPublished);
        }

        [Fact]
        public void Should_throw_if_schema_is_not_published()
        {
            Assert.Throws<DomainException>(() => sut.Unpublish());
        }

        [Fact]
        public void Should_reorder_fields()
        {
            var field1 = new StringField(1, "1", new StringFieldProperties());
            var field2 = new StringField(2, "2", new StringFieldProperties());
            var field3 = new StringField(3, "3", new StringFieldProperties());

            sut = sut.AddOrUpdateField(field1);
            sut = sut.AddOrUpdateField(field2);
            sut = sut.AddOrUpdateField(field3);
            sut = sut.ReorderFields(new List<long> { 3, 2, 1 });

            Assert.Equal(new List<Field> { field3, field2, field1 }, sut.Fields.ToList());
        }

        [Fact]
        public void Should_throw_if_not_all_fields_are_covered_for_reordering()
        {
            var field1 = new StringField(1, "1", new StringFieldProperties());
            var field2 = new StringField(2, "2", new StringFieldProperties());

            sut = sut.AddOrUpdateField(field1);
            sut = sut.AddOrUpdateField(field2);

            Assert.Throws<ArgumentException>(() => sut.ReorderFields(new List<long> { 1 }));
        }

        [Fact]
        public void Should_throw_if_field_to_reorder_does_not_exist()
        {
            var field1 = new StringField(1, "1", new StringFieldProperties());
            var field2 = new StringField(2, "2", new StringFieldProperties());

            sut = sut.AddOrUpdateField(field1);
            sut = sut.AddOrUpdateField(field2);

            Assert.Throws<ArgumentException>(() => sut.ReorderFields(new List<long> { 1, 4 }));
        }

        [Fact]
        public void Should_build_schema()
        {
            var languagesConfig = LanguagesConfig.Create(Language.DE, Language.EN);

            var jsonSchema = BuildMixedSchema().BuildJsonSchema(languagesConfig, (n, s) => new JsonSchema4 { SchemaReference = s });

            Assert.NotNull(jsonSchema);
        }

        [Fact]
        public void Should_build_edm_model()
        {
            var languagesConfig = LanguagesConfig.Create(Language.DE, Language.EN);

            var edmModel = BuildMixedSchema().BuildEdmType(languagesConfig, x => x);

            Assert.NotNull(edmModel);
        }

        private static Schema BuildMixedSchema()
        {
            var allowedValues = new[] { "1", "2" }.ToImmutableList();

            var schema =
                Schema.Create("user", new SchemaProperties { Hints = "The User" })
                    .AddOrUpdateField(new JsonField(1, "my-json", 
                        new JsonFieldProperties()))
                    .AddOrUpdateField(new StringField(2, "my-string1",
                        new StringFieldProperties { Label = "My String1", IsLocalizable = true, IsRequired = true, AllowedValues = allowedValues }))
                    .AddOrUpdateField(new StringField(3, "my-string2",
                        new StringFieldProperties { Hints = "My String1" }))
                    .AddOrUpdateField(new NumberField(4, "my-number",
                        new NumberFieldProperties { MinValue = 1, MaxValue = 10 }))
                    .AddOrUpdateField(new BooleanField(5, "my-boolean",
                        new BooleanFieldProperties()))
                    .AddOrUpdateField(new DateTimeField(6, "my-datetime",
                        new DateTimeFieldProperties { Editor = DateTimeFieldEditor.DateTime }))
                    .AddOrUpdateField(new DateTimeField(7, "my-date",
                        new DateTimeFieldProperties { Editor = DateTimeFieldEditor.Date }))
                    .AddOrUpdateField(new GeolocationField(8, "my-geolocation",
                        new GeolocationFieldProperties()))
                    .AddOrUpdateField(new AssetsField(9, "my-assets",
                        new AssetsFieldProperties(), new Mock<IAssetTester>().Object));

            return schema;
        }

        private NumberField AddField()
        {
            var field = new NumberField(1, "my-field", new NumberFieldProperties());

            sut = sut.AddOrUpdateField(field);

            return field;
        }
    }
}