using System;
using Microsoft.Extensions.Logging;
using xCommons.Extensions;
using xCommons.Providers;
using xEventService.Configuration;
using xEventService.Constants;
using xEventService.Extensions;
using xExceptions.Constants;

namespace xEventService.Providers
{
    /// <summary>
    /// Base Event Consumer Service ...
    /// </summary>
    public abstract class XBaseEventConsumerBackgroundService : XResumableBackgroundService
    {
        /// <summary>
        /// Consumed Topic Messages ...
        /// </summary>
        protected readonly string topic;

        /// <summary>
        /// Allowed Senders ...
        /// </summary>
        public readonly string[] allowedSenders;

        /// <summary>
        /// Allowed Actions ...
        /// </summary>
        public readonly string[] allowedActions;

        /// <summary>
        /// Configuration ...
        /// </summary>
        protected readonly XEventServiceConfiguration configuration;

        protected XBaseEventConsumerBackgroundService(
            string[] allowedActions,
            string[] allowedSenders,
            IServiceProvider serviceProvider,
            XEventServiceConfiguration configuration,
            ILogger<XResumableBackgroundService> logger,
            string topic = XEventServiceConstants.XDefaultTopic
        ) : base(
            logger: logger,
            serviceProvider: serviceProvider
        )
        {
            //
            // Validate Actions ...
            if (!allowedActions
                .IsAllowedCollection() ||
                !allowedSenders
                .IsAllowedCollection() ||
                !configuration.IsValid()
            )
            {
                XException.InvalidArgs.Throw();
            }

            //
            this.topic = topic;
            this.configuration = configuration;
            this.allowedActions = allowedActions;
            this.allowedSenders = allowedSenders;
        }
    }
}