using FrameworkDAL.DTO.EIPConversation;
using GB5Shared.DTO.Framework.Login;
using Microsoft.Extensions.Logging;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace FrameworkBLL.EIPConversation.EIPHandlers.EIPEngine.ActionHandler
{
    public class ValidationActionHandler : IEIPActionHandler
    {
        // Mandatory interface property
        public string ActionCode => "VALIDATE_INPUT";

        private readonly ILogger<ValidationActionHandler> _logger;

        public ValidationActionHandler(ILogger<ValidationActionHandler> logger)
        {
            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
        }

        public bool CanHandle(string actionCode)
        {
            return string.Equals(actionCode, ActionCode, StringComparison.OrdinalIgnoreCase);
        }

        public Task<EIPActionResultDTO> HandleAsync(
            EIPActionContextDTO context,
            LoginDTO loginDTO,
            CancellationToken cancellationToken)
        {
            try
            {
                if (context?.Payload == null)
                    throw new ArgumentNullException(nameof(context.Payload), "Payload cannot be null");

                if (!context.Payload.ContainsKey("PhoneNumber") || string.IsNullOrWhiteSpace(context.Payload["PhoneNumber"]?.ToString()))
                    throw new Exception("PhoneNumber is required");

                _logger.LogInformation("Validation successful for PhoneNumber={PhoneNumber}", context.Payload["PhoneNumber"]);

                return Task.FromResult(new EIPActionResultDTO
                {
                    IsSuccess = true,
                    Message = "Validation successful"
                });
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Validation failed");

                return Task.FromResult(new EIPActionResultDTO
                {
                    IsSuccess = false,
                    Message = ex.Message,
                    ErrorMessage = ex.ToString()
                });
            }
        }
    }
}