using System;
using Microsoft.Extensions.DependencyInjection;
using xCommons.Configurations;
using xCommons.Extensions;
using xExceptions.Constants;
using xServices.TermsConditions.Interfaces;
using xServices.TermsConditions.Provides;
using xStringService.Interfaces.Entities;

namespace xServices.TermsConditions.DI
{
    public static class TermsConditionsExtensions
    {
        /// <summary>
        /// Register TermsConditions Provider ...
        /// </summary>
        /// <param name="services"></param>
        /// <param name="lifeTime"></param>
        public static void AddXTermsConditionsService(
            this IServiceCollection services,
            ServiceLifetime lifeTime = ServiceLifetime.Transient
        )
        {
            //
            AddTermsConditionsService(
                services: services,
                lifeTime: lifeTime
            );
        }

        //
        #region Private ...
        /// <summary>
        /// a LogTag for Service ...
        /// </summary>
        private static string XLogTag = "XTermsConditionsService";

        /// <summary>
        /// print a log in Console ...
        /// </summary>
        /// <param name="message"></param>
        private static void Log(string message)
        {
            Console.WriteLine($"{XLogTag} => {message}");
        }

        /// <summary>
        /// Add Terms and Conditions Provider Service ...
        /// </summary>
        /// <param name="services"></param>
        /// <param name="lifeTime"></param>
        private static void AddTermsConditionsService(
            IServiceCollection services,
            ServiceLifetime lifeTime = ServiceLifetime.Transient
        )
        {
            //
            var exception = XException.InvalidArgs.ToException(); ;

            //
            // Services ...
            var isServicesExists = !services.IsNull();
            if (!isServicesExists)
            {
                //
                Log("AddTermsConditions failed, services not provided ...");
                throw exception;
            }

            //
            // Lifetime ...
            var isLifetimeExists = !lifeTime.IsNull();
            if (!isLifetimeExists)
            {
                //
                Log("AddTermsConditions failed, lifetime not provided ...");
                throw exception;
            }

            //
            // Check Dependencies Exists ...
            var isDependenciesPassed = !services
                .GetRegisteredService<XAppConfiguration>()
                .IsNull() &&
                !services.GetRegisteredService<IXStringRepository>()
                .IsNull();
            if (!isDependenciesPassed)
            {
                //
                Log("AddTermsConditions failed due Dependencies Issues, IXStringRepository or XAppConfiguration not provided ...");
                throw exception;
            }

            //
            // Register Resource Providers ...
            services.Add(new ServiceDescriptor(typeof(IXTermsComditionsProvider), typeof(XTermsComditionsProvider), lifeTime));
        }
        #endregion
    }
}