using System.Text.Json;
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>
/// 세계 주요국 증시지수 스냅샷 수집 — Yahoo Finance v8 chart(무키)를 심볼별로 하루 1회 조회해 최신 종가를 upsert.
/// config(WorldIndex:Items) 심볼(Yahoo 표기, 예: ^GSPC/^N225/000001.SS)을 하나씩 GET 하고 meta 를 파싱해 WorldIndexSnapshot 에 반영한다.
/// 국내(코스피)는 이 배치가 아니라 GetWorldIndices Handler 가 IndexDailyPrice 실데이터에서 병합한다.
/// 기본 07:00 KST 실행. 심볼 하나 실패는 skip(격리)하고, 전량 실패 시에만 재시도. (Stooq 봇차단으로 소스 전환 2026-07-09)
/// </summary>
internal sealed class WorldIndexSyncService(
    IServiceScopeFactory scopeFactory,
    IHttpClientFactory httpClientFactory,
    IOptions<AppSettings> settings,
    ILogger<WorldIndexSyncService> logger
) : DailyScheduledService(logger)
{
    protected override string JobName => "WorldIndexSync";

    protected override TimeOnly TargetTime => ParseTime(settings.Value.WorldIndex.SyncTime, new TimeOnly(7, 0));

    protected override int MaxRetryCount => 2;

    protected override TimeSpan RetryDelay => TimeSpan.FromMinutes(settings.Value.WorldIndex.RetryDelayMinutes > 0 ? settings.Value.WorldIndex.RetryDelayMinutes : 60);

    protected override async Task<bool> RunOnceAsync(DateOnly todayKst, CancellationToken ct)
    {
        var cfg = settings.Value.WorldIndex;

        using var scope = scopeFactory.CreateScope();
        var collectorSettings = scope.ServiceProvider.GetRequiredService<ICollectorSettingsProvider>();
        if (!await collectorSettings.IsEnabledAsync(CollectorFlag.WorldIndex, ct))
        {
            return true;
        }

        var items = cfg.Items.Where(c => !string.IsNullOrWhiteSpace(c.Symbol)).ToList();

        if (items.Count == 0)
        {
            Logger.LogWarning("[{Job}] WorldIndex:Items 미설정 — 수집 skip", JobName);
            return true;
        }

        var db = scope.ServiceProvider.GetRequiredService<IAppDbContext>();
        var client = httpClientFactory.CreateClient(YahooFinanceHttp.ClientName);

        var existing = await db.WorldIndexSnapshot.ToListAsync(ct);
        var existingBySymbol = existing.ToDictionary(c => c.Symbol, StringComparer.OrdinalIgnoreCase);

        var baseUrl = cfg.BaseUrl.TrimEnd('/');
        var inserted = 0;
        var updated = 0;
        var failed = 0;

        foreach (var meta in items)
        {
            ct.ThrowIfCancellationRequested();

            var symbol = meta.Symbol.Trim();
            // range=1mo — 최신 종가(meta)와 함께 스파크라인용 일별 종가 시계열(~20영업일)을 한 번에 수신
            var url = $"{baseUrl}/v8/finance/chart/{Uri.EscapeDataString(symbol)}?interval=1d&range=1mo";

            YahooChartParser.YahooQuote? q;
            string? sparkJson = null;
            try
            {
                var json = await YahooFinanceHttp.GetStringWithRetryAsync(client, url, Logger, ct);
                q = YahooChartParser.Parse(json, symbol);
                var series = YahooChartParser.ParseCloseSeries(json, 30);
                if (series.Count > 0)
                {
                    sparkJson = JsonSerializer.Serialize(series);
                }
            }
            catch (Exception ex) when (ex is not OperationCanceledException)
            {
                Logger.LogWarning(ex, "[{Job}] {Symbol} 조회 실패 — skip", JobName, symbol);
                failed++;
                continue;
            }

            if (q is null)
            {
                Logger.LogWarning("[{Job}] {Symbol} 데이터 없음 — skip", JobName, symbol);
                failed++;
                continue;
            }

            if (existingBySymbol.TryGetValue(q.Symbol, out var snap))
            {
                snap.UpdateMeta(meta.Name, meta.CountryCode, meta.ExchangeName);
                snap.Apply(q.TradeDate, q.Close, q.Open, q.High, q.Low);
                snap.SetSpark(sparkJson);
                updated++;
            }
            else
            {
                var created = WorldIndexSnapshot.Create(q.Symbol, meta.Name, meta.CountryCode, meta.ExchangeName, q.TradeDate, q.Close, q.Open, q.High, q.Low);
                created.SetSpark(sparkJson);
                await db.WorldIndexSnapshot.AddAsync(created, ct);
                existingBySymbol[q.Symbol] = created;
                inserted++;
            }
        }

        if (inserted == 0 && updated == 0)
        {
            Logger.LogWarning("[{Job}] 전량 실패 (failed={Failed}) — 재시도 대상", JobName, failed);
            return false;
        }

        await db.SaveChangesAsync(ct);
        Logger.LogInformation("[{Job}] 완료 — inserted={Inserted}, updated={Updated}, failed={Failed}", JobName, inserted, updated, failed);
        return true;
    }
}