// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Drawing;
using System.Formats.Nrbf;
using System.Private.Windows;
using System.Private.Windows.Core.BinaryFormat;
using System.Reflection.Metadata;
using System.Runtime.Serialization;
using System.Text.Json;
 
namespace System.Windows.Forms.Nrbf;
 
internal static class WinFormsSerializationRecordExtensions
{
    /// <summary>
    ///  Tries to get this object as a binary formatted <see cref="ImageListStreamer"/>.
    /// </summary>
    public static bool TryGetImageListStreamer(
        this SerializationRecord record,
        out object? imageListStreamer)
    {
        return SerializationRecordExtensions.TryGet(Get, record, out imageListStreamer);
 
        static bool Get(SerializationRecord record, [NotNullWhen(true)] out object? imageListStreamer)
        {
            imageListStreamer = null;
 
            if (record is not ClassRecord types
                || !types.TypeNameMatches(typeof(ImageListStreamer))
                || !types.HasMember("Data")
                || types.GetRawValue("Data") is not SZArrayRecord<byte> data)
            {
                return false;
            }
 
            imageListStreamer = new ImageListStreamer(data.GetArray());
            return true;
        }
    }
 
    /// <summary>
    ///  Tries to get this object as a binary formatted <see cref="Bitmap"/>.
    /// </summary>
    public static bool TryGetBitmap(this SerializationRecord record, out object? bitmap)
    {
        bitmap = null;
 
        if (record is not ClassRecord types
            || !types.TypeNameMatches(typeof(Bitmap))
            || !types.HasMember("Data")
            || types.GetRawValue("Data") is not SZArrayRecord<byte> data)
        {
            return false;
        }
 
        bitmap = new Bitmap(new MemoryStream(data.GetArray()));
        return true;
    }
 
    /// <summary>
    ///  Tries to deserialize this object if it was serialized as JSON.
    /// </summary>
    /// <returns>
    ///  <see langword="true"/> if the data was serialized as JSON. Otherwise, <see langword="false"/>.
    /// </returns>
    /// <exception cref="SerializationException">If the data was supposed to be our <see cref="JsonData{T}"/>, but was serialized incorrectly./></exception>
    /// <exception cref="NotSupportedException">If an exception occurred while JSON deserializing.</exception>
    public static bool TryGetObjectFromJson<T>(this SerializationRecord record, ITypeResolver resolver, out object? @object)
    {
        @object = null;
 
        if (record.TypeName.AssemblyName?.FullName != IJsonData.CustomAssemblyName)
        {
            // The data was not serialized as JSON.
            return false;
        }
 
        if (record is not ClassRecord types
            || types.GetRawValue("<JsonBytes>k__BackingField") is not SZArrayRecord<byte> byteData
            || types.GetRawValue("<InnerTypeAssemblyQualifiedName>k__BackingField") is not string innerTypeFullName
            || !TypeName.TryParse(innerTypeFullName, out TypeName? serializedTypeName))
        {
            // This is supposed to be JsonData, but somehow the binary formatted data is corrupt.
            throw new SerializationException();
        }
 
        Type serializedType = resolver.GetType(serializedTypeName);
        if (!serializedType.IsAssignableTo(typeof(T)))
        {
            // Not the type the caller asked for so @object remains null.
            return true;
        }
 
        try
        {
            @object = JsonSerializer.Deserialize<T>(byteData.GetArray());
        }
        catch (Exception ex)
        {
            throw new NotSupportedException(SR.ClipboardOrDragDrop_JsonDeserializationFailed, ex);
        }
 
        return true;
    }
 
    /// <summary>
    ///  Try to get a supported object. This supports common types used in WinForms that do not have type converters.
    /// </summary>
    public static bool TryGetResXObject(this SerializationRecord record, [NotNullWhen(true)] out object? value) =>
        record.TryGetFrameworkObject(out value)
        || record.TryGetBitmap(out value)
        || record.TryGetImageListStreamer(out value);
 
    public static bool TryGetCommonObject(this SerializationRecord record, [NotNullWhen(true)] out object? value) =>
        record.TryGetResXObject(out value)
        || record.TryGetDrawingPrimitivesObject(out value);
}