// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System.Collections.Generic;
using System.IO;
using System.Xml.Linq;

namespace XliffTasks.Model;

/// <summary>
/// A <see cref="TranslatableDocument"/> for files in .resx format.
/// See https://msdn.microsoft.com/en-us/library/ekyft91f(v=vs.100).aspx
/// </summary>
internal sealed class ResxDocument : TranslatableXmlDocument
{
    protected override IEnumerable<TranslatableNode> GetTranslatableNodes()
    {
        foreach (XElement node in Document.Descendants("data"))
        {
            // skip non-string data
            if (node.Attribute("type") != null || node.Attribute("mimetype") != null)
            {
                continue;
            }

            string name = node.Attribute("name").Value;
            XElement valueElement = node.Element("value");
            string value = valueElement?.Value;
            string comment = node.Element("comment")?.Value ?? "";

            // skip designer goo that should not be translated
            if (name.StartsWith(">>") || name.EndsWith(".LayoutSettings"))
            {
                continue;
            }

            // skip fully "locked" strings
            if (comment == "{Locked}")
            {
                continue;
            }

            // skip empty strings
            if (string.IsNullOrWhiteSpace(value))
            {
                continue;
            }

            yield return new TranslatableXmlElement(
                id: name,
                source: value, 
                note: comment, 
                element: valueElement);
        }
    }

    public override void RewriteRelativePathsToAbsolute(string sourceFullPath)
    {
        foreach (XElement node in Document.Descendants("data"))
        {
            if (node.Attribute("type")?.Value == "System.Resources.ResXFileRef, System.Windows.Forms")
            {
                XElement valueNodeOfFileRef = node.Element("value");
                string[] splitRelativePathAndSerializedType = valueNodeOfFileRef.Value.Split(';');
                string resourceRelativePath = splitRelativePathAndSerializedType[0].Replace('\\', Path.DirectorySeparatorChar);

                string absolutePath = Path.Combine(Path.GetDirectoryName(sourceFullPath), resourceRelativePath);
                splitRelativePathAndSerializedType[0] = absolutePath;

                valueNodeOfFileRef.Value = string.Join(";", splitRelativePathAndSerializedType);
            }
        }
    }
}