using Bitget_Server.Application.State;
using Bitget_Server.Domain;
using Bitget_Server.Domain.Enums;
using Bitget_Server.Domain.Models;
using Bitget_Server.Infrastructure.Bitget;
using Bitget_Server.Infrastructure.Utils;

namespace Bitget_Server.Application.Services;

/// <summary>
/// 기존 MainForm.getMarketCandleData_WebService 이식.
/// 신호 검색 대상 마켓/인터벌 조합의 초기 캔들 데이터를 일괄 로드한다.
/// BitgetRateLimiter 를 자연스럽게 경유하므로 별도 Thread.Sleep(50) 이 불필요.
/// </summary>
public class InitialCandleLoader
{
    private const int CandleCount = 200;

    private readonly BitgetClient _client;
    private readonly MarketState _state;
    private readonly ILogger<InitialCandleLoader> _logger;

    public InitialCandleLoader(BitgetClient client, MarketState state, ILogger<InitialCandleLoader> logger)
    {
        _client = client;
        _state = state;
        _logger = logger;
    }

    /// <summary>
    /// 체크된 마켓 목록에 대해 캔들 데이터를 채운다.
    /// </summary>
    public async Task LoadAsync(IEnumerable<string> marketNames, IEnumerable<string> intervalDescriptions, CancellationToken ct)
    {
        var intervalSet = new HashSet<string>(intervalDescriptions ?? Array.Empty<string>());

        foreach (var marketName in marketNames ?? Array.Empty<string>())
        {
            if (ct.IsCancellationRequested) break;

            MarketCandleDataList marketCandleDataList;
            lock (_state.SyncRoot)
            {
                marketCandleDataList = _state.candleDataLists.Find(i => i.ConGoodsData?.MarketName == marketName);
            }
            if (marketCandleDataList == null) continue;

            foreach (MCandleTimeType interval in Enum.GetValues(typeof(MCandleTimeType)))
            {
                if (ct.IsCancellationRequested) break;

                var description = Convertor.GetEnumDescription(interval);
                if (!intervalSet.Contains(description)) continue;

                var url = string.Format(
                    BitgetEndpoints.MarketCandle_Future,
                    marketName,
                    description,
                    CandleCount.ToString(),
                    "USDT-FUTURES");

                try
                {
                    await _client.SendWebServerAsync(
                        ExchangeWebReqType.BitgetCandleStick_Future,
                        url,
                        marketCandleDataList,
                        interval,
                        ct: ct).ConfigureAwait(false);
                }
                catch (Exception ex)
                {
                    _logger.LogWarning(ex, "초기 캔들 로드 실패 ({Market} / {Interval})", marketName, description);
                }
            }
        }
    }
}