using System.Security.Claims;
using Web.Api.Common;
using Web.Api.Extensions;
using Application.Abstractions.Messaging;

namespace Web.Api.Endpoints.Store;

/// <summary>상점 — 최근 후원 채널 자동 검증. localStorage 의 stale ID 자동 제거용.</summary>
internal sealed class ChannelsGetByIds : IEndpoint
{
    /// <summary>최대 ID 개수 (방어적 상한).</summary>
    private const int MaxIDs = 10;

    public void MapEndpoint(IEndpointRouteBuilder app)
    {
        app.MapGet("api/store/channels/by-ids", async (
            string? ids,
            ClaimsPrincipal user,
            ISender sender,
            CancellationToken ct
        ) => {
            var memberID = user.GetRequiredMemberID();

            var parsed = (ids ?? "")
                .Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
                .Select(s => int.TryParse(s, out var v) ? v : 0)
                .Where(v => v > 0)
                .Distinct()
                .Take(MaxIDs)
                .ToList();

            var data = await sender.Send(new Application.Features.Api.Channel.GetByIds.Query(memberID, parsed), ct);

            return ApiResponse.Ok(data);
        })
        .WithTags("Store")
        .RequireAuthorization();
    }
}