// Copyright (c) Umbraco.
// See LICENSE for more details.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
using System.Xml.XPath;
using Moq;
using Umbraco.Cms.Core.Models;
using Umbraco.Cms.Core.PropertyEditors;
using Umbraco.Cms.Core.Strings;
using Umbraco.Cms.Infrastructure.PublishedCache;
using Umbraco.Cms.Infrastructure.PublishedCache.DataSource;
using Umbraco.Cms.Infrastructure.PublishedCache.Persistence;
using Umbraco.Cms.Infrastructure.Serialization;
using Umbraco.Cms.Tests.Common.Builders;
using Umbraco.Cms.Tests.Common.Builders.Extensions;
using Umbraco.Extensions;

namespace Umbraco.Cms.Tests.Common.Published;

/// <summary>
///     Converts legacy Umbraco XML structures to NuCache <see cref="ContentNodeKit" /> collections
///     to populate a test implementation of <see cref="INuCacheContentService" />
/// </summary>
/// <remarks>
///     This does not support variant data because the XML structure doesn't support variant data.
/// </remarks>
public static class PublishedContentXmlAdapter
{
    /// <summary>
    ///     Generate a collection of <see cref="ContentNodeKit" /> based on legacy umbraco XML
    /// </summary>
    /// <param name="xml">The legacy umbraco XML</param>
    /// <param name="shortStringHelper"></param>
    /// <param name="contentTypes">Dynamically generates a list of <see cref="ContentType" />s based on the XML data</param>
    /// <param name="dataTypes">Dynamically generates a list of <see cref="DataType" /> for tests</param>
    /// <returns></returns>
    public static IEnumerable<ContentNodeKit> GetContentNodeKits(
        string xml,
        IShortStringHelper shortStringHelper,
        out ContentType[] contentTypes,
        out DataType[] dataTypes)
    {
        // use the label data type for all data for these tests except in the case
        // where a property is named 'content', in which case use the RTE.
        var serializer = new SystemTextConfigurationEditorJsonSerializer();
        var labelDataType =
            new DataType(new VoidEditor("Label", Mock.Of<IDataValueEditorFactory>()), serializer) { Id = 3 };
        var rteDataType = new DataType(new VoidEditor("RTE", Mock.Of<IDataValueEditorFactory>()), serializer) { Id = 4 };
        dataTypes = new[] { labelDataType, rteDataType };

        var kitsAndXml = new List<(ContentNodeKit kit, XElement node)>();

        var xDoc = XDocument.Parse(xml);
        var nodes = xDoc.XPathSelectElements("//*[@isDoc]");
        foreach (var node in nodes)
        {
            var id = node.AttributeValue<int>("id");
            var key = node.AttributeValue<Guid?>("key") ?? id.ToGuid();

            var propertyElements = node.Elements().Where(x => x.Attribute("id") == null);
            var properties = new Dictionary<string, PropertyData[]>();
            foreach (var propertyElement in propertyElements)
            {
                properties[propertyElement.Name.LocalName] = new[]
                {
                    // TODO: builder?
                    new PropertyData {Culture = string.Empty, Segment = string.Empty, Value = propertyElement.Value}
                };
            }

            var contentData = new ContentDataBuilder()
                .WithName(node.AttributeValue<string>("nodeName"))
                .WithProperties(properties)
                .WithPublished(true)
                .WithTemplateId(node.AttributeValue<int>("template"))
                .WithUrlSegment(node.AttributeValue<string>("urlName"))
                .WithVersionDate(node.AttributeValue<DateTime>("updateDate"))
                .WithWriterId(node.AttributeValue<int>("writerID"))
                .Build();

            var kit = ContentNodeKitBuilder.CreateWithContent(
                node.AttributeValue<int>("nodeType"),
                id,
                node.AttributeValue<string>("path"),
                node.AttributeValue<int>("sortOrder"),
                node.AttributeValue<int>("level"),
                node.AttributeValue<int>("parentID"),
                node.AttributeValue<int>("creatorID"),
                key,
                node.AttributeValue<DateTime>("createDate"),
                contentData,
                contentData);

            kitsAndXml.Add((kit, node));
        }

        // put together the unique content types
        var contentTypesIdToType = new Dictionary<int, ContentType>();
        foreach ((var kit, var node) in kitsAndXml)
        {
            if (!contentTypesIdToType.TryGetValue(kit.ContentTypeId, out var contentType))
            {
                contentType = new ContentType(shortStringHelper, -1)
                {
                    Id = kit.ContentTypeId,
                    Alias = node.Name.LocalName
                };
                SetContentTypeProperties(shortStringHelper, labelDataType, rteDataType, kit, contentType);
                contentTypesIdToType[kit.ContentTypeId] = contentType;
            }
            else
            {
                // we've already created it but might need to add properties
                SetContentTypeProperties(shortStringHelper, labelDataType, rteDataType, kit, contentType);
            }
        }

        contentTypes = contentTypesIdToType.Values.ToArray();

        return kitsAndXml.Select(x => x.kit);
    }

    private static void SetContentTypeProperties(
        IShortStringHelper shortStringHelper,
        DataType labelDataType,
        DataType rteDataType,
        ContentNodeKit kit,
        ContentType contentType)
    {
        foreach (var property in kit.DraftData.Properties)
        {
            var propertyType = new PropertyType(shortStringHelper, labelDataType, property.Key);

            if (!contentType.PropertyTypeExists(propertyType.Alias))
            {
                if (propertyType.Alias == "content")
                {
                    propertyType.DataTypeId = rteDataType.Id;
                }

                contentType.AddPropertyType(propertyType);
            }
        }
    }
}