using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using MMDAL.DTO.Shift;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MMBLL.Shift
{
    /// <summary>
    /// Business Logic Layer interface for managing Shift operations.
    /// Provides methods to retrieve, insert/update, list, and delete shifts with business rules applied.
    /// </summary>
    public interface IShiftBLL
    {
        /// <summary>
        /// Retrieves the details of a single shift by its unique identifier.
        /// </summary>
        /// <param name="ShiftId">The unique identifier of the shift.</param>
        /// <param name="LoginDTO">The current user's login details.</param>
        /// <returns>A JSON string representing the shift details.</returns>
        Task<string> GetShift(int ShiftId, LoginDTO LoginDTO);

        /// <summary>
        /// Inserts a new shift or updates an existing shift.
        /// Automatically applies any business rules, such as setting Created/Modified fields.
        /// </summary>
        /// <param name="ShiftDTO">The shift data to save or update.</param>
        /// <param name="LoginDTO">The current user's login details.</param>
        /// <returns>A JSON string indicating the success of the operation, optionally with the ShiftId.</returns>
        Task<string> SaveShift(ShiftDTO ShiftDTO, LoginDTO LoginDTO);

        /// <summary>
        /// Retrieves a list of shifts based on specified criteria.
        /// Typically used to populate dropdowns or selection lists in the UI.
        /// </summary>
        /// <param name="CriteriaDTO">Filter criteria for selecting shifts.</param>
        /// <param name="LoginDTO">The current user's login details.</param>
        /// <returns>A JSON string representing a list of shifts.</returns>
        Task<string> GetSelectListShift(CriteriaDTO CriteriaDTO, LoginDTO LoginDTO);

        /// <summary>
        /// Deletes a shift by its unique identifier.
        /// </summary>
        /// <param name="ShiftId">The unique identifier of the shift to delete.</param>
        /// <param name="LoginDTO">The current user's login details.</param>
        /// <returns>A JSON string indicating success or failure of the delete operation.</returns>
        Task<string> DeleteShift(int ShiftId, LoginDTO LoginDTO);
    }

}