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

#nullable enable

using Microsoft.AspNetCore.Mvc.Infrastructure;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.Extensions.DependencyInjection;

namespace Microsoft.AspNetCore.Mvc;

/// <summary>
/// An <see cref="IActionResult"/> which renders a view component to the response.
/// </summary>
public class ViewComponentResult : ActionResult, IStatusCodeActionResult
{
    /// <summary>
    /// Gets or sets the arguments provided to the view component.
    /// </summary>
    public object? Arguments { get; set; }

    /// <summary>
    /// Gets or sets the HTTP status code.
    /// </summary>
    public int? StatusCode { get; set; }

    /// <summary>
    /// Gets or sets the name of the view component to invoke. Will be ignored if <see cref="ViewComponentType"/>
    /// is set to a non-<c>null</c> value.
    /// </summary>
    public string? ViewComponentName { get; set; }

    /// <summary>
    /// Gets or sets the type of the view component to invoke.
    /// </summary>
    public Type? ViewComponentType { get; set; }

    /// <summary>
    /// Get the view data model.
    /// </summary>
    public object? Model => ViewData?.Model;

    /// <summary>
    /// Gets or sets the <see cref="ViewDataDictionary"/> for this result.
    /// </summary>
    public ViewDataDictionary ViewData { get; set; } = default!;

    /// <summary>
    /// Gets or sets the <see cref="ITempDataDictionary"/> for this result.
    /// </summary>
    public ITempDataDictionary TempData { get; set; } = default!;

    /// <summary>
    /// Gets or sets the Content-Type header for the response.
    /// </summary>
    public string? ContentType { get; set; }

    /// <inheritdoc />
    public override Task ExecuteResultAsync(ActionContext context)
    {
        ArgumentNullException.ThrowIfNull(context);

        var services = context.HttpContext.RequestServices;
        var executor = services.GetService<IActionResultExecutor<ViewComponentResult>>();
        if (executor == null)
        {
            throw new InvalidOperationException(Mvc.Core.Resources.FormatUnableToFindServices(
                nameof(IServiceCollection),
                "AddControllersWithViews()",
                "ConfigureServices(...)"));
        }

        return executor.ExecuteAsync(context, this);
    }
}
