using Bitget_Server.Application.Options;
using Bitget_Server.Application.State;
using Bitget_Server.Domain.Enums;
using Bitget_Server.Infrastructure.Bitget;
using Microsoft.Extensions.Options;

namespace Bitget_Server.Application.BackgroundServices;

/// <summary>
/// 기존 MainForm.DataCalculateThread (1000ms loop) 이식.
/// BitgetWebSocketClient 가 수집한 메시지를 주기적으로 꺼내어 candleDataLists 로 병합한다.
/// </summary>
public class WebSocketCalcBackgroundService : BackgroundService
{
    private readonly BitgetWebSocketClient _ws;
    private readonly MarketState _state;
    private readonly BitgetOptions _options;
    private readonly ILogger<WebSocketCalcBackgroundService> _logger;

    public WebSocketCalcBackgroundService(
        BitgetWebSocketClient ws,
        MarketState state,
        IOptions<BitgetOptions> options,
        ILogger<WebSocketCalcBackgroundService> logger)
    {
        _ws = ws;
        _state = state;
        _options = options.Value;
        _logger = logger;
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        _logger.LogInformation("WebSocketCalcBackgroundService 시작 (Interval={Ms}ms)", _options.WebSocketCalcIntervalMs);

        var delay = TimeSpan.FromMilliseconds(Math.Max(200, _options.WebSocketCalcIntervalMs));

        while (!stoppingToken.IsCancellationRequested)
        {
            try
            {
                await Task.Delay(delay, stoppingToken).ConfigureAwait(false);

                // WebSocket 이 꺼져 있으면 처리할 데이터도 없으므로 skip
                if (!_ws.IsConnected) continue;

                List<object> intervalsSnapshot;
                lock (_state.SyncRoot)
                    intervalsSnapshot = _state.IntervalList.ToList();

                _ws.CalculateDataList(BitgetWebSocketType.캔들정보, intervalsSnapshot);
            }
            catch (OperationCanceledException) { /* shutdown */ }
            catch (Exception ex)
            {
                _logger.LogWarning(ex, "WebSocket 집계 루프 오류");
            }
        }

        _logger.LogInformation("WebSocketCalcBackgroundService 종료");
    }
}