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

using Squidex.Domain.Apps.Core.Contents;
using Squidex.Domain.Apps.Core.Rules.EnrichedEvents;
using Squidex.Domain.Apps.Core.Templates;
using Squidex.Domain.Apps.Core.Templates.Extensions;
using Squidex.Infrastructure;
using Xunit;

namespace Squidex.Domain.Apps.Core.Operations.Templates
{
    public class FluidTemplateEngineTests
    {
        private readonly FluidTemplateEngine sut;

        public FluidTemplateEngineTests()
        {
            var extensions = new IFluidExtension[]
            {
                new ContentFluidExtension(),
                new DateTimeFluidExtension(),
                new StringFluidExtension(),
                new StringWordsFluidExtension()
            };

            sut = new FluidTemplateEngine(extensions);
        }

        [Theory]
        [InlineData("{{ e.user }}", "subject:me")]
        [InlineData("{{ e.user.type }}", "subject")]
        [InlineData("{{ e.user.identifier }}", "me")]
        public async Task Should_render_ref_token(string template, string expected)
        {
            var value = new
            {
                User = RefToken.User("me")
            };

            var result = await RenderAync(template, value);

            Assert.Equal(expected, result);
        }

        [Theory]
        [InlineData("{{ e.id }}", "42,my-app")]
        [InlineData("{{ e.id.name }}", "my-app")]
        [InlineData("{{ e.id.id }}", "42")]
        public async Task Should_render_named_id(string template, string expected)
        {
            var value = new
            {
                Id = NamedId.Of("42", "my-app")
            };

            var result = await RenderAync(template, value);

            Assert.Equal(expected, result);
        }

        [Fact]
        public async Task Should_format_domain_id()
        {
            var value = new
            {
                Id = DomainId.NewGuid()
            };

            var template = "{{ e.id }}";

            var result = await RenderAync(template, value);

            Assert.Equal(value.Id.ToString(), result);
        }

        [Fact]
        public async Task Should_format_enum()
        {
            var value = new
            {
                Type = EnrichedContentEventType.Created
            };

            var template = "{{ e.type }}";

            var result = await RenderAync(template, value);

            Assert.Equal(value.Type.ToString(), result);
        }

        [Fact]
        public async Task Should_format_date()
        {
            var now = DateTime.UtcNow;

            var value = new
            {
                Timestamp = now
            };

            var template = "{{ e.timestamp | format_date: 'yyyy-MM-dd-hh-mm-ss' }}";

            var result = await RenderAync(template, value);

            Assert.Equal($"{now:yyyy-MM-dd-hh-mm-ss}", result);
        }

        [Fact]
        public async Task Should_format_content_data()
        {
            var template = "{{ e.data.value.en }}";

            var value = new
            {
                Data =
                    new ContentData()
                        .AddField("value",
                            new ContentFieldData()
                                .AddLocalized("en", "Hello"))
            };

            var result = await RenderAync(template, value);

            Assert.Equal("Hello", result);
        }

        [Fact]
        public async Task Should_format_html_to_text()
        {
            var template = "{{ e.text | html2text }}";

            var value = new
            {
                Text = "<script>Invalid</script><STYLE>Invalid</STYLE><p>Hello World</p>"
            };

            var result = await RenderAync(template, value);

            Assert.Equal("Hello World", result);
        }

        [Fact]
        public async Task Should_convert_markdown_to_text()
        {
            var template = "{{ e.text | markdown2text }}";

            var value = new
            {
                Text = "## Hello World"
            };

            var result = await RenderAync(template, value);

            Assert.Equal("Hello World", result);
        }

        [Fact]
        public async Task Should_format_word_count()
        {
            var template = "{{ e.text | word_count }}";

            var value = new
            {
                Text = "Hello World"
            };

            var result = await RenderAync(template, value);

            Assert.Equal("2", result);
        }

        [Fact]
        public async Task Should_format_character_count()
        {
            var template = "{{ e.text | character_count }}";

            var value = new
            {
                text = "Hello World"
            };

            var result = await RenderAync(template, value);

            Assert.Equal("10", result);
        }

        [Fact]
        public async Task Should_compute_md5_hash()
        {
            var template = "{{ e.text | md5 }}";

            var value = new
            {
                text = "HelloWorld"
            };

            var result = await RenderAync(template, value);

            Assert.Equal("HelloWorld".ToMD5(), result);
        }

        [Fact]
        public async Task Should_compute_sha256_hash()
        {
            var template = "{{ e.text | sha256 }}";

            var value = new
            {
                text = "HelloWorld"
            };

            var result = await RenderAync(template, value);

            Assert.Equal("HelloWorld".ToSha256(), result);
        }

        [Fact]
        public async Task Should_throw_exception_if_template_invalid()
        {
            var template = "{% for x of event %}";

            await Assert.ThrowsAsync<TemplateParseException>(() => sut.RenderAsync(template, new TemplateVars()));
        }

        private Task<string> RenderAync(string template, object value)
        {
            return sut.RenderAsync(template, new TemplateVars { ["e"] = value });
        }
    }
}