using Admin.NET.Plugin.AiDOP.Entity.DataPlatform;
using Microsoft.Extensions.Caching.Memory;

namespace Admin.NET.Plugin.AiDOP.DataPlatform;

public sealed class MdpPullFieldMappingService : ITransient
{
    private readonly ISqlSugarClient _db;
    private readonly IMemoryCache _cache;

    public MdpPullFieldMappingService(ISqlSugarClient db, IMemoryCache cache)
    {
        _db = db;
        _cache = cache;
    }

    public async Task<IReadOnlyList<MdpFieldMapping>> GetAsync(long entityId, CancellationToken cancellationToken = default)
    {
        var key = CacheKey(entityId);
        if (_cache.TryGetValue(key, out IReadOnlyList<MdpFieldMapping>? cached) && cached != null)
            return cached;

        var list = await _db.Queryable<MdpFieldMapping>()
            .Where(x => x.EntityId == entityId)
            .OrderBy(x => x.SortOrder)
            .OrderBy(x => x.Id)
            .ToListAsync(cancellationToken);
        IReadOnlyList<MdpFieldMapping> frozen = list;
        _cache.Set(key, frozen, TimeSpan.FromSeconds(30));
        return frozen;
    }

    public void Invalidate(long entityId) => _cache.Remove(CacheKey(entityId));

    public static string CacheKey(long entityId) => $"mdp:pull-map:{entityId}";
}