using System;
using System.ComponentModel.DataAnnotations;
using System.Threading;
using System.Threading.Tasks;
using FrameworkDAL.CustomCode.RoleVsDashboard;
using FrameworkDAL.DTO.Dashboard;
using GB5Shared.DaprCache;
using GB5Shared.DTO.Framework.AutoNumber;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.GenerateAutoNumber;
using GB5Shared.Resource.Response;
using GB5Shared.Validation;

namespace FrameworkBLL.RoleVsDashboard
{
    public class RoleVsDashboardBLL : IRoleVsDashboardBLL
    {
        private readonly IRoleVsDashboardDAL _RoleVsDashboardDAL;
        private readonly AutoNumber _AutoNumber;
        private readonly IValidation _Validation;
        private readonly KeyInvalidate _KeyInvalidate;

        public RoleVsDashboardBLL(IRoleVsDashboardDAL RoleVsDashboardDAL, AutoNumber AutoNumber, IValidation Validation, KeyInvalidate KeyInvalidate)
        {
            _RoleVsDashboardDAL = RoleVsDashboardDAL;
            _AutoNumber = AutoNumber;
            _Validation = Validation;
            _KeyInvalidate = KeyInvalidate;
        }

        public async Task<string> GetRoleVsDashboard(int RoleId, LoginDTO LoginDTO, CancellationToken ct = default)
        {
            try
            {
                return await _RoleVsDashboardDAL.GetRoleVsDashboard(RoleId, LoginDTO, ct);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> SaveRoleVsDashboard(RoleVsDashboardDTO RoleVsDashboardDTO, LoginDTO LoginDTO, CancellationToken ct = default)
        {
            if (RoleVsDashboardDTO == null) throw new ArgumentNullException(nameof(RoleVsDashboardDTO));
            AutoNumberDTO? autoNumberDTO = null;

            try
            {
                string result;
                if (RoleVsDashboardDTO.RoleVsDashboardId == 0)
                {
                    autoNumberDTO = await _AutoNumber.GetAutoNumber(1, "ROLEVSDASHBOARD", LoginDTO);
                    RoleVsDashboardDTO.RoleVsDashboardId = autoNumberDTO.StartNumber;

                    await _RoleVsDashboardDAL.SaveRoleVsDashboard(RoleVsDashboardDTO, LoginDTO, ct);
                    result = $"{SuccessResponse.SaveSuccessMessage} {RoleVsDashboardDTO.RoleVsDashboardId}";
                }
                else
                {
                    await _RoleVsDashboardDAL.UpdateRoleVsDashboard(RoleVsDashboardDTO, LoginDTO, ct);
                    result = $"{SuccessResponse.UpdateSuccessMessage} {RoleVsDashboardDTO.RoleVsDashboardId}";
                }

                // A Role->Dashboard mapping change affects GetDashboardListForUser for every user
                // who holds that role — an unbounded, unenumerable set from here (same reasoning
                // as DashboardBLL's own writes). Full flush; these are rare/admin-driven writes.
                await _KeyInvalidate.AllInvalidateCache("-1").ConfigureAwait(false);
                return result;
            }
            catch (ValidationException vex)
            {
                throw new Exception(vex.Message);
            }
            catch (Exception)
            {
                if (autoNumberDTO != null && RoleVsDashboardDTO.RoleVsDashboardId > 0)
                    await _AutoNumber.RollbackAutoNumber("ROLEVSDASHBOARD", RoleVsDashboardDTO.RoleVsDashboardId, LoginDTO);

                throw;
            }
        }

        public async Task<string> DeleteRoleVsDashboard(int RoleId, LoginDTO LoginDTO, CancellationToken ct = default)
        {
            try
            {
                var result = await _RoleVsDashboardDAL.DeleteRoleVsDashboard(RoleId, LoginDTO, ct);
                await _KeyInvalidate.AllInvalidateCache("-1").ConfigureAwait(false);
                return result;
            }
            catch (Exception)
            {
                throw;
            }
        }

        // Phase 6 reconciliation pair — these only compute a diff between MROLEVSDASHBOARD and
        // MUSERVSDASHBOARD, mirroring RoleVsPortletBLL's identical GetRoleVsPortletForUpdateUserVsPortlet/
        // GetUserVsPortletForDeleteUserVsPortlet. Nothing here writes to MUSERVSDASHBOARD — the
        // caller applies the result via the existing SaveUserVsDashboard/DeleteUserVsDashboard endpoints.

        public async Task<string> GetRoleVsDashboardForUpdateUserVsDashboard(int RoleId, LoginDTO LoginDTO, CancellationToken ct = default)
        {
            try
            {
                return await _RoleVsDashboardDAL.GetRoleVsDashboardForUpdateUserVsDashboard(RoleId, LoginDTO, ct);
            }
            catch (Exception)
            {
                throw;
            }
        }

        public async Task<string> GetUserVsDashboardForDeleteUserVsDashboard(int RoleId, LoginDTO LoginDTO, CancellationToken ct = default)
        {
            try
            {
                return await _RoleVsDashboardDAL.GetUserVsDashboardForDeleteUserVsDashboard(RoleId, LoginDTO, ct);
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}