using FrameworkDAL.CustomCode.EIPConversation.EIPSessionAdmin;
using FrameworkDAL.DTO.EIPConversation;
using GB5Shared.DTO.Framework.Login;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

namespace FrameworkBLL.EIPConversation.EIPAdmin.EIPSessionAdmin
{
    public class EIPSessionAdminBLL : IEIPSessionAdminBLL
    {
        private readonly IEIPSessionAdminDAL _dal;
        private readonly ILogger<EIPSessionAdminBLL> _logger;

        public EIPSessionAdminBLL(
            IEIPSessionAdminDAL dal,
            ILogger<EIPSessionAdminBLL> logger)
        {
            _dal    = dal    ?? throw new ArgumentNullException(nameof(dal));
            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
        }

        public async Task<IEnumerable<EIPSessionListDTO>> GetSessionListAsync(
            string? status,
            int? channelType,
            DateTime? fromDate,
            DateTime? toDate,
            LoginDTO login,
            CancellationToken ct = default)
        {
            try
            {
                // Normalise status to uppercase
                var normStatus = status?.Trim().ToUpperInvariant();
                if (normStatus != null && normStatus != "ACTIVE" && normStatus != "EXPIRED")
                    throw new ArgumentException("Status must be ACTIVE or EXPIRED (or omit to return all).");

                _logger.LogInformation(
                    "BLL | GetSessionList | Tenant={TenantId} | Status={Status} | ChannelType={ChannelType}",
                    login.ClientId, normStatus, channelType);

                return await _dal.GetSessionListAsync(
                    normStatus, channelType, fromDate, toDate, login, ct)
                    .ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex,
                    "BLL | GetSessionList | Error | Tenant={TenantId}", login.ClientId);
                throw;
            }
        }
    }
}