using Application.Abstractions.Data;
using Domain.Entities.Stocks;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using SharedKernel;

namespace Infrastructure.StockData;

/// <summary>
/// T+1 일별 시세 수집 — 금융위 주식시세정보 API (영업일+1 13시 이후 반영).
/// 기본 13:10 KST 실행, basDt=직전 영업일 전량 수집 → StockDailyPrice upsert + Stock denorm(최근 종가/등락률/시총) 갱신.
/// 미반영(0건)이면 2시간 간격 2회 재시도 (≈15시/17시). ServiceKey 미설정 시 로그만 남기고 skip.
/// </summary>
internal sealed class DailyPriceSyncService(
    IServiceScopeFactory scopeFactory,
    IHttpClientFactory httpClientFactory,
    IOptions<AppSettings> settings,
    ILogger<DailyPriceSyncService> logger
) : DailyScheduledService(logger)
{
    private const string ServicePath = "/1160100/service/GetStockSecuritiesInfoService/getStockPriceInfo";
    private const int MaxPages = 50;

    protected override string JobName => "DailyPriceSync";

    protected override TimeOnly TargetTime => ParseTime(settings.Value.StockData.DailyPriceSyncTime, new TimeOnly(13, 10));

    protected override int MaxRetryCount => 2;

    protected override TimeSpan RetryDelay => TimeSpan.FromHours(2);

    protected override async Task<bool> RunOnceAsync(DateOnly todayKst, CancellationToken ct)
    {
        var cfg = settings.Value.StockData.DataGoKr;
        if (string.IsNullOrWhiteSpace(cfg.ServiceKey))
        {
            Logger.LogWarning("[{Job}] StockData:DataGoKr:ServiceKey 미설정 — 수집 skip", JobName);
            return true;
        }

        using var scope = scopeFactory.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<IAppDbContext>();
        var client = httpClientFactory.CreateClient(DataGoKrHttp.ClientName);

        var targetDate = await MarketCalendar.GetPreviousBusinessDayAsync(db, todayKst, ct);
        var rows = new List<DataGoKrStockParser.DailyPriceItem>();
        var totalCount = int.MaxValue;

        for (var pageNo = 1; pageNo <= MaxPages && rows.Count < totalCount; pageNo++)
        {
            var url = $"{cfg.BaseUrl.TrimEnd('/')}{ServicePath}?serviceKey={Uri.EscapeDataString(cfg.ServiceKey)}&resultType=json&numOfRows={cfg.PageSize}&pageNo={pageNo}&basDt={targetDate:yyyyMMdd}";
            var json = await DataGoKrHttp.GetStringWithRetryAsync(client, url, Logger, ct);
            var (items, total) = DataGoKrStockParser.ParseDailyPrices(json);

            totalCount = total;
            if (items.Count == 0)
            {
                break;
            }

            rows.AddRange(items);
        }

        if (rows.Count == 0)
        {
            Logger.LogInformation("[{Job}] basDt={TargetDate} 시세 미반영 (0건)", JobName, targetDate);
            return false;
        }

        var stockByCode = await db.Stock.ToDictionaryAsync(c => c.Code, ct);
        var existingByStockID = await db.StockDailyPrice.Where(c => c.TradingDate == targetDate).ToDictionaryAsync(c => c.StockID, ct);
        var inserted = 0;
        var updated = 0;
        var unknown = 0;

        foreach (var row in rows)
        {
            if (!stockByCode.TryGetValue(row.Code, out var stock))
            {
                // 마스터 미동기화 종목 — 다음 마스터 동기화 후 자연 반영
                unknown++;
                continue;
            }

            if (existingByStockID.TryGetValue(stock.ID, out var price))
            {
                price.Update(row.Open, row.High, row.Low, row.Close, row.Volume, row.TradingValue, row.ChangeAmount, row.ChangeRate, row.MarketCap, row.ListedShares);
                updated++;
            }
            else
            {
                await db.StockDailyPrice.AddAsync(StockDailyPrice.Create(stock.ID, row.TradingDate, row.Open, row.High, row.Low, row.Close, row.Volume, row.TradingValue, row.ChangeAmount, row.ChangeRate, row.MarketCap, row.ListedShares), ct);
                inserted++;
            }

            stock.UpdateLastPrice(row.TradingDate, row.Close, row.ChangeRate, row.MarketCap);
        }

        await db.SaveChangesAsync(ct);

        Logger.LogInformation("[{Job}] 완료 — basDt={TargetDate}, rows={Rows}, inserted={Inserted}, updated={Updated}, unknownCode={Unknown}",
            JobName, targetDate, rows.Count, inserted, updated, unknown);

        return true;
    }
}