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.getMarketInfoList_WebService (300ms loop) 이식.
/// USDT-FUTURES 마켓 Ticker 정보를 주기적으로 새로고침하여 MarketState.marketInfoList 를 갱신한다.
/// </summary>
public class MarketInfoBackgroundService : BackgroundService
{
    private readonly BitgetClient _client;
    private readonly BitgetOptions _options;
    private readonly MarketState _state;
    private readonly ILogger<MarketInfoBackgroundService> _logger;

    public MarketInfoBackgroundService(
        BitgetClient client,
        IOptions<BitgetOptions> options,
        MarketState state,
        ILogger<MarketInfoBackgroundService> logger)
    {
        _client = client;
        _options = options.Value;
        _state = state;
        _logger = logger;
    }

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

        var delay = TimeSpan.FromMilliseconds(Math.Max(100, _options.MarketInfoUpdateIntervalMs));

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

                await _client.SendWebServerAsync(
                    ExchangeWebReqType.BitgetMarket_Future,
                    ct: stoppingToken).ConfigureAwait(false);

                // 결과는 BitgetClient.Parse 가 _state.marketInfoList 에 반영함
            }
            catch (OperationCanceledException) { /* shutdown */ }
            catch (Exception ex)
            {
                _logger.LogWarning(ex, "MarketInfo 업데이트 오류");
            }
        }

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