using AccountsBLL.Warehouse;
using FastEndpoints;
using GB5Shared.DTO.Framework.Login;
using GB5Shared.DTO.Framework.ResponseStandard;
using GB5Shared.FastEndPoint;

namespace AccountsSL.EndPoints.WarehouseFact
{
    // Full-batch warehouse posting: posts ALL registered fact tables for a given date range across
    // all active OUs. Intended for nightly jobs or manual admin backfills.
    // For per-fact delta drain, use POST /Warehouse/PostWarehouseDelta?FactId=N instead.
    public class PostAll : BaseEndpoint<PostAll.PostAllParameters, ResponseStandardDTO<object>>
    {
        private readonly IWarehouseFactPostingBLL _postingBll;

        public PostAll(IWarehouseFactPostingBLL postingBll) => _postingBll = postingBll;

        public override void Configure()
        {
            Post("/Warehouse/PostAll");
            AllowAnonymous();
        }

        public record PostAllParameters(
            [property: FromHeader] string Login,
            [property: QueryParam] DateTime DateFrom,
            [property: QueryParam] DateTime DateTo
        );

        protected override string? GetCacheKey(PostAllParameters req, LoginDTO login) => null;

        protected override async Task<ResponseStandardDTO<object>> ExecuteAsync(
            PostAllParameters req, LoginDTO login, CancellationToken ct)
        {
            if (req.DateFrom > req.DateTo)
                return await GB5Shared.ResponseStandard.Response.CreateExceptionError<string>(
                    new ArgumentException("DateFrom must not be after DateTo."),
                    GB5Shared.GB5Constant.Constant.CacheKeyLevel.NOT_REQUIRED, login,
                    "DateFrom must not be after DateTo.", 400);

            try
            {
                var results = await _postingBll.PostAllFactsAsync(req.DateFrom, req.DateTo, login, ct);

                var summary = results.Select(kv => new
                {
                    FactId           = kv.Key,
                    SucceededOuCount = kv.Value.SucceededOuIds.Count,
                    FailedOuCount    = kv.Value.FailedOuIds.Count,
                    kv.Value.FailedOuIds
                });

                return await GB5Shared.ResponseStandard.Response.CreateSuccessResponse(
                    System.Text.Json.JsonSerializer.Serialize(summary),
                    GB5Shared.GB5Constant.Constant.CacheKeyLevel.NOT_REQUIRED, login);
            }
            catch (Exception ex)
            {
                return await GB5Shared.ResponseStandard.Response.CreateExceptionError<string>(
                    ex, GB5Shared.GB5Constant.Constant.CacheKeyLevel.NOT_REQUIRED, login, ex.Message, 500);
            }
        }
    }
}