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

namespace Microsoft.JSInterop.Infrastructure;

/// <summary>
/// Information about a JSInterop call from JavaScript to .NET.
/// </summary>
public readonly struct DotNetInvocationInfo
{
    /// <summary>
    /// Initializes a new instance of <see cref="DotNetInvocationInfo"/>.
    /// </summary>
    /// <param name="assemblyName">The name of the assembly containing the method.</param>
    /// <param name="methodIdentifier">The identifier of the method to be invoked.</param>
    /// <param name="dotNetObjectId">The object identifier for instance method calls.</param>
    /// <param name="callId">The call identifier.</param>
    public DotNetInvocationInfo(string? assemblyName, string methodIdentifier, long dotNetObjectId, string? callId)
    {
        CallId = callId;
        AssemblyName = assemblyName;
        MethodIdentifier = methodIdentifier;
        DotNetObjectId = dotNetObjectId;
    }

    /// <summary>
    /// Gets the name of the assembly containing the method.
    /// Only one of <see cref="DotNetObjectId"/> or <see cref="AssemblyName"/> may be specified.
    /// </summary>
    public string? AssemblyName { get; }

    /// <summary>
    /// Gets the identifier of the method to be invoked. This is the value specified in the <see cref="JSInvokableAttribute"/>.
    /// </summary>
    public string MethodIdentifier { get; }

    /// <summary>
    /// Gets the object identifier for instance method calls.
    /// Only one of <see cref="DotNetObjectId"/> or <see cref="AssemblyName"/> may be specified.
    /// </summary>
    public long DotNetObjectId { get; }

    /// <summary>
    /// Gets the call identifier. This value is <see langword="null"/> when the client does not expect a value to be returned.
    /// </summary>
    public string? CallId { get; }
}
