using Microsoft.AspNetCore.Builder;

namespace DigitalData.Core.API
{
    /// <summary>
    /// Provides extension methods for adding middleware to the application's request pipeline.
    /// </summary>
    public static class DIExtensions
    {
        /// <summary>
        /// Adds the <see cref="CSPMiddleware"/> to the application's request pipeline to include 
        /// Content Security Policy (CSP) headers in the HTTP response.
        /// </summary>
        /// <param name="app">The application builder.</param>
        /// <param name="policy">
        /// The CSP policy string with placeholders. The first format parameter {0} will be replaced 
        /// by the nonce value.
        /// </param>
        /// <returns>The application builder with the CSP middleware added.</returns>
        public static IApplicationBuilder UseCSPMiddleware(this IApplicationBuilder app, string policy)
            => app.UseMiddleware<CSPMiddleware>(policy);

        /// <summary>
        /// Checks if the DiP (Development in Production) mode is enabled for the WebApplicationBuilder.
        /// </summary>
        /// <param name="builder">The WebApplicationBuilder instance.</param>
        /// <returns>True if DiP mode is enabled; otherwise, false.</returns>
        public static bool IsDiP(this WebApplicationBuilder builder) => builder.Configuration.GetValue<bool>("DiPMode");

        /// <summary>
        /// Checks if the DiP (Development in Production) mode is enabled for the WebApplication.
        /// </summary>
        /// <param name="app">The WebApplication instance.</param>
        /// <returns>True if DiP mode is enabled; otherwise, false.</returns>
        public static bool IsDiP(this WebApplication app) => app.Configuration.GetValue<bool>("DiPMode");

        /// <summary>
        /// Checks if the environment is Development or DiP (Development in Production) mode is enabled for the WebApplicationBuilder.
        /// </summary>
        /// <param name="builder">The WebApplicationBuilder instance.</param>
        /// <returns>True if the environment is Development or DiP mode is enabled; otherwise, false.</returns>
        public static bool IsDevOrDiP(this WebApplicationBuilder builder) => builder.Environment.IsDevelopment() || builder.IsDiP();

        /// <summary>
        /// Checks if the environment is Development or DiP (Development in Production) mode is enabled for the WebApplication.
        /// </summary>
        /// <param name="app">The WebApplication instance.</param>
        /// <returns>True if the environment is Development or DiP mode is enabled; otherwise, false.</returns>
        public static bool IsDevOrDiP(this WebApplication app) => app.Environment.IsDevelopment() || app.IsDiP();
    }
}