using FastEndpoints;
using FrameworkBLL.MenuGroup;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using static GB5Shared.GB5Constant.Constant;

namespace FrameworkSL.Endpoints.MenuGroup
{
    /// <summary>
    /// New sibling to GetMenuForUserModule/GetMenuListBasedMenuSetForTree — added rather than
    /// modifying either in place, so those hot, currently-uncached, production paths carry zero
    /// regression risk from this feature. Callers on a PRESENTATIONTYPE=1/2 MenuSet should call
    /// this instead; PRESENTATIONTYPE=0 callers can keep using the existing endpoints unchanged
    /// (this endpoint also handles that case by delegating, but isn't the required migration path).
    /// </summary>
    public class GetMenuGroupTree : BaseEndpoint<GetMenuGroupTree.GetMenuGroupTreeParameters, ResponseStandardDTO<object>>
    {
        private readonly IMenuGroupBLL _menuGroupBLL;

        public GetMenuGroupTree(IMenuGroupBLL menuGroupBLL) => _menuGroupBLL = menuGroupBLL;

        public override void Configure()
        {
            Get("/MenuGroup/GetMenuGroupTree");
            AllowAnonymous();
        }

        public record GetMenuGroupTreeParameters(
            [property: FromHeader] string Login,
            [property: QueryParam] int MenuSetId
        );

        // Keyed on MenuSetId alone (not MenuSetId+RoleId as a literal per-role cache would
        // require) — see MenuGroupBLL's caching remarks for why: this keeps invalidation to
        // one key per write instead of an unbounded per-role fanout. This endpoint's resolution
        // order (gb5_menu_presentation_layer.sql) does not itself filter by role.
        protected override string? GetCacheKey(GetMenuGroupTreeParameters req, LoginDTO loginDTO)
            => KeyGenerator.KeyGeneration(req.MenuSetId, EntityConstant.OBJECTMENUGROUP, CacheKeyLevel.CLIENT_LEVEL, loginDTO);

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(
            GetMenuGroupTreeParameters req, LoginDTO loginDTO, CancellationToken ct)
        {
            var result = await _menuGroupBLL.GetMenuGroupTreeForSet(req.MenuSetId, loginDTO, ct);
            return await GB5Shared.ResponseStandard.Response.CreateSuccessResponse(result, CacheKeyLevel.CLIENT_LEVEL, loginDTO);
        }
    }
}