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

using System;
using System.Text.Json;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc.Infrastructure;
using Microsoft.Extensions.DependencyInjection;

namespace Microsoft.AspNetCore.Mvc
{
    /// <summary>
    /// An action result which formats the given object as JSON.
    /// </summary>
    public class JsonResult : ActionResult, IStatusCodeActionResult
    {
        /// <summary>
        /// Creates a new <see cref="JsonResult"/> with the given <paramref name="value"/>.
        /// </summary>
        /// <param name="value">The value to format as JSON.</param>
        public JsonResult(object? value)
        {
            Value = value;
        }

        /// <summary>
        /// Creates a new <see cref="JsonResult"/> with the given <paramref name="value"/>.
        /// </summary>
        /// <param name="value">The value to format as JSON.</param>
        /// <param name="serializerSettings">
        /// The serializer settings to be used by the formatter.
        /// <para>
        /// When using <c>System.Text.Json</c>, this should be an instance of <see cref="JsonSerializerOptions" />.
        /// </para>
        /// <para>
        /// When using <c>Newtonsoft.Json</c>, this should be an instance of <c>JsonSerializerSettings</c>.
        /// </para>
        /// </param>
        public JsonResult(object? value, object? serializerSettings)
        {
            Value = value;
            SerializerSettings = serializerSettings;
        }

        /// <summary>
        /// Gets or sets the <see cref="Net.Http.Headers.MediaTypeHeaderValue"/> representing the Content-Type header of the response.
        /// </summary>
        public string? ContentType { get; set; }

        /// <summary>
        /// Gets or sets the serializer settings.
        /// <para>
        /// When using <c>System.Text.Json</c>, this should be an instance of <see cref="JsonSerializerOptions" />
        /// </para>
        /// <para>
        /// When using <c>Newtonsoft.Json</c>, this should be an instance of <c>JsonSerializerSettings</c>.
        /// </para>
        /// </summary>
        public object? SerializerSettings { get; set; }

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

        /// <summary>
        /// Gets or sets the value to be formatted.
        /// </summary>
        public object? Value { get; set; }

        /// <inheritdoc />
        public override Task ExecuteResultAsync(ActionContext context)
        {
            if (context == null)
            {
                throw new ArgumentNullException(nameof(context));
            }

            var services = context.HttpContext.RequestServices;
            var executor = services.GetRequiredService<IActionResultExecutor<JsonResult>>();
            return executor.ExecuteAsync(context, this);
        }
    }
}
