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

using Fluid;
using Fluid.Values;
using Squidex.Domain.Apps.Core.Rules.EnrichedEvents;
using Squidex.Domain.Apps.Core.Templates;
using Squidex.Infrastructure;
using Squidex.Text;

namespace Squidex.Domain.Apps.Core.HandleRules.Extensions
{
    public sealed class EventFluidExtensions : IFluidExtension
    {
        private readonly IUrlGenerator urlGenerator;

        public EventFluidExtensions(IUrlGenerator urlGenerator)
        {
            Guard.NotNull(urlGenerator, nameof(urlGenerator));

            this.urlGenerator = urlGenerator;
        }

        public void RegisterGlobalTypes(IMemberAccessStrategy memberAccessStrategy)
        {
            TemplateContext.GlobalFilters.AddFilter("contentUrl", ContentUrl);
            TemplateContext.GlobalFilters.AddFilter("assetContentUrl", AssetContentUrl);
            TemplateContext.GlobalFilters.AddFilter("assetContentAppUrl", AssetContentAppUrl);
            TemplateContext.GlobalFilters.AddFilter("assetContentSlugUrl", AssetContentSlugUrl);
        }

        private FluidValue ContentUrl(FluidValue input, FilterArguments arguments, TemplateContext context)
        {
            var value = input.ToObjectValue();

            switch (value)
            {
                case DomainId id:
                    {
                        if (context.GetValue("event")?.ToObjectValue() is EnrichedContentEvent contentEvent)
                        {
                            var result = urlGenerator.ContentUI(contentEvent.AppId, contentEvent.SchemaId, id);

                            return new StringValue(result);
                        }

                        break;
                    }

                case EnrichedContentEvent contentEvent:
                    {
                        var result = urlGenerator.ContentUI(contentEvent.AppId, contentEvent.SchemaId, contentEvent.Id);

                        return new StringValue(result);
                    }
            }

            return NilValue.Empty;
        }

        private FluidValue AssetContentUrl(FluidValue input, FilterArguments arguments, TemplateContext context)
        {
            var value = input.ToObjectValue();

            switch (value)
            {
                case DomainId id:
                    {
                        if (context.GetValue("event")?.ToObjectValue() is EnrichedAssetEvent assetEvent)
                        {
                            var result = urlGenerator.AssetContent(assetEvent.AppId, id.ToString());

                            return new StringValue(result);
                        }

                        break;
                    }

                case EnrichedAssetEvent assetEvent:
                    {
                        var result = urlGenerator.AssetContent(assetEvent.AppId, assetEvent.Id.ToString());

                        return new StringValue(result);
                    }
            }

            return NilValue.Empty;
        }

        private FluidValue AssetContentAppUrl(FluidValue input, FilterArguments arguments, TemplateContext context)
        {
            var value = input.ToObjectValue();

            switch (value)
            {
                case DomainId id:
                    {
                        if (context.GetValue("event")?.ToObjectValue() is EnrichedAssetEvent assetEvent)
                        {
                            var result = urlGenerator.AssetContent(assetEvent.AppId, id.ToString());

                            return new StringValue(result);
                        }

                        break;
                    }

                case EnrichedAssetEvent assetEvent:
                    {
                        var result = urlGenerator.AssetContent(assetEvent.AppId, assetEvent.Id.ToString());

                        return new StringValue(result);
                    }
            }

            return NilValue.Empty;
        }

        private FluidValue AssetContentSlugUrl(FluidValue input, FilterArguments arguments, TemplateContext context)
        {
            var value = input.ToObjectValue();

            switch (value)
            {
                case string s:
                    {
                        if (context.GetValue("event")?.ToObjectValue() is EnrichedAssetEvent assetEvent)
                        {
                            var result = urlGenerator.AssetContent(assetEvent.AppId, s.Slugify());

                            return new StringValue(result);
                        }

                        break;
                    }

                case EnrichedAssetEvent assetEvent:
                    {
                        var result = urlGenerator.AssetContent(assetEvent.AppId, assetEvent.FileName.Slugify());

                        return new StringValue(result);
                    }
            }

            return NilValue.Empty;
        }
    }
}