using FastEndpoints;
using GB5Shared.DaprCache;
using GB5Shared.DTO.Framework.Criteria;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;
using MMBLL.Allocation;
using static GB5Shared.GB5Constant.Constant;

namespace MMSL.EndPoints.Allocation
{
    // ─────────────────────────────────────────────────────────────────────
    //  GetPendingAllocations  – POST /Allocation/GetPendingAllocations
    //
    //  Accepts:
    //    • Login header (LoginDTO, extracted by BaseEndpoint)
    //    • CriteriaDTO body (existing format, all legacy clients continue to work)
    //    • SearchText query param (optional — new clients; legacy embeds in body)
    //    • PageOffset / PageSize query params
    //
    //  Cache: CLIENT_LEVEL — shared across all users of the same client/tenant.
    //  The criteria body + paging params are hashed by KeyGeneration.
    // ─────────────────────────────────────────────────────────────────────
    public class GetPendingAllocations
        : BaseEndpoint<GetPendingAllocations.Params, ResponseStandardDTO<object>>
    {
        private readonly IPendingAllocationBLL _bll;

        public GetPendingAllocations(IPendingAllocationBLL bll) => _bll = bll;

        public override void Configure()
        {
            Post("/Allocation/GetPendingAllocations");
            AllowAnonymous();
        }

        public record Params(
            [property: FromHeader] string Login,
            [property: FromBody]   CriteriaDTO CriteriaDTO,
            [property: QueryParam] string? SearchText  = null,
            [property: QueryParam] int     PageOffset  = 0,
            [property: QueryParam] int     PageSize    = 100
        );

        protected override string? GetCacheKey(Params req, LoginDTO login)
        {
            try
            {
                return KeyGenerator.KeyGeneration(
                    req.CriteriaDTO,
                    req.PageOffset,
                    CacheKeyLevel.CLIENT_LEVEL,
                    login);
            }
            catch (Exception)
            {
                throw;
            }
        }

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(
            Params req, LoginDTO login, CancellationToken ct)
        {
            try
            {
                var result = await _bll.GetPendingAllocations(
                    req.CriteriaDTO,
                    req.SearchText,
                    req.PageOffset,
                    req.PageSize,
                    login,
                    ct);

                return await GB5Shared.ResponseStandard.Response.CreateSuccessResponse(
                    result, CacheKeyLevel.CLIENT_LEVEL, login);
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response.CreateExceptionError<string>(
                    ex, CacheKeyLevel.CLIENT_LEVEL, login, ex.Message, 500);
            }
        }
    }
}