using Application.Abstractions.Data;
using Domain.Entities.Stocks;
using Microsoft.EntityFrameworkCore;

namespace Infrastructure.StockData;

/// <summary>
/// SeibroDividendSyncService 의 DB 반영 로직 분리 (테스트 가능) — HTTP 없이 파서 출력(fixture)으로 검증한다
/// (SeibroIssuerImport 패턴 미러링). 세 엔티티(DividendSchedule/Dividend/RightsBaseDate) upsert 를 담당한다.
/// </summary>
public static class SeibroDividendImport
{
    /// <summary>
    /// getDivSchedulInfo 결과를 DividendSchedule 로 upsert — UQ (IssucoCustno, RgtStdDt, RgtRsnDetailSortCd).
    /// 한 번의 호출로 들어온 rows 를 한 트랜잭션으로 반영한다 (날짜 스윕: 그날 여러 회사·유형).
    /// </summary>
    public static async Task<(int Inserted, int Updated)> UpsertSchedulesAsync(IAppDbContext db, IReadOnlyList<SeibroDivSchedulParser.Row> rows, CancellationToken ct)
    {
        if (rows.Count == 0)
        {
            return (0, 0);
        }

        var custnos = rows.Select(c => c.IssucoCustno).Distinct().ToList();
        var existing = await db.DividendSchedule.Where(c => custnos.Contains(c.IssucoCustno)).ToListAsync(ct);
        var byKey = existing.ToDictionary(c => (c.IssucoCustno, c.RgtStdDt, c.RgtRsnDetailSortCd));
        var inserted = 0;
        var updated = 0;

        foreach (var row in rows)
        {
            var key = (row.IssucoCustno, row.RgtStdDt, row.RgtRsnDetailSortCd);

            if (byKey.TryGetValue(key, out var entity))
            {
                var was = entity.UpdatedAt;
                entity.Update(row.RepSecnNm, row.RgtRacd, row.AllocWhcd, row.SetaccTpcd, row.FixTpcd, row.RostCloseBeginDt, row.RostCloseExpryDt, row.XrgtDt, row.IsElectronicSecurity);
                if (entity.UpdatedAt != was)
                {
                    updated++;
                }
            }
            else
            {
                var created = DividendSchedule.Create(row.IssucoCustno, row.RepSecnNm, row.RgtRacd, row.RgtRsnDetailSortCd, row.RgtStdDt, row.AllocWhcd, row.SetaccTpcd, row.FixTpcd, row.RostCloseBeginDt, row.RostCloseExpryDt, row.XrgtDt, row.IsElectronicSecurity);
                await db.DividendSchedule.AddAsync(created, ct);
                byKey[key] = created;
                inserted++;
            }
        }

        await db.SaveChangesAsync(ct);
        return (inserted, updated);
    }

    /// <summary>
    /// getDivInfo 결과를 Dividend 로 upsert — UQ (Isin, RgtStdDt). rows 는 한 회사(회사번호) 3년치 배당 이력.
    /// </summary>
    public static async Task<(int Inserted, int Updated)> UpsertDividendsAsync(IAppDbContext db, IReadOnlyList<SeibroDivInfoParser.Row> rows, CancellationToken ct)
    {
        if (rows.Count == 0)
        {
            return (0, 0);
        }

        var isins = rows.Select(c => c.Isin).Distinct().ToList();
        var existing = await db.Dividend.Where(c => isins.Contains(c.Isin)).ToListAsync(ct);
        var byKey = existing.ToDictionary(c => (c.Isin, c.RgtStdDt));
        var inserted = 0;
        var updated = 0;

        foreach (var row in rows)
        {
            var key = (row.Isin, row.RgtStdDt);

            if (byKey.TryGetValue(key, out var entity))
            {
                var was = entity.UpdatedAt;
                entity.Update(row.KorSecnNm, row.SecnKacdNm, row.Pval, row.StkAllocRatio, row.CashAllocRatio, row.CashAllocAmt, row.MartpDivRate, row.Th1PayTermBeginDt, row.DeliDt, row.MajshrEtcDiffAllocYn, row.TstkNoagnYn, row.CashDiffDiviAmt, row.CashDiffDiviRate, row.StkDiffDiviRate, row.MartpDiffDiviRate);
                if (entity.UpdatedAt != was)
                {
                    updated++;
                }
            }
            else
            {
                var created = Dividend.Create(row.Isin, row.KorSecnNm, row.SecnKacdNm, row.RgtStdDt, row.Pval, row.StkAllocRatio, row.CashAllocRatio, row.CashAllocAmt, row.MartpDivRate, row.Th1PayTermBeginDt, row.DeliDt, row.MajshrEtcDiffAllocYn, row.TstkNoagnYn, row.CashDiffDiviAmt, row.CashDiffDiviRate, row.StkDiffDiviRate, row.MartpDiffDiviRate);
                await db.Dividend.AddAsync(created, ct);
                byKey[key] = created;
                inserted++;
            }
        }

        await db.SaveChangesAsync(ct);
        return (inserted, updated);
    }

    /// <summary>
    /// getStddtInfo 결과를 RightsBaseDate 로 upsert — UQ (IssucoCustno, RgtStdDt, RgtRacd, RgtRsnDetailSortCd).
    /// rows 는 한 회사 3년치 권리기준일.
    /// </summary>
    public static async Task<(int Inserted, int Updated)> UpsertRightsBaseDatesAsync(IAppDbContext db, IReadOnlyList<SeibroStddtParser.Row> rows, CancellationToken ct)
    {
        if (rows.Count == 0)
        {
            return (0, 0);
        }

        var custnos = rows.Select(c => c.IssucoCustno).Distinct().ToList();
        var existing = await db.RightsBaseDate.Where(c => custnos.Contains(c.IssucoCustno)).ToListAsync(ct);
        var byKey = existing.ToDictionary(c => (c.IssucoCustno, c.RgtStdDt, c.RgtRacd, c.RgtRsnDetailSortCd));
        var inserted = 0;
        var updated = 0;

        foreach (var row in rows)
        {
            var key = (row.IssucoCustno, row.RgtStdDt, row.RgtRacd, row.RgtRsnDetailSortCd);

            if (byKey.TryGetValue(key, out var entity))
            {
                var was = entity.UpdatedAt;
                entity.Update(row.RepSecnNm, row.RgtRacdNm);
                if (entity.UpdatedAt != was)
                {
                    updated++;
                }
            }
            else
            {
                var created = RightsBaseDate.Create(row.IssucoCustno, row.RepSecnNm, row.RgtStdDt, row.RgtRacd, row.RgtRacdNm, row.RgtRsnDetailSortCd);
                await db.RightsBaseDate.AddAsync(created, ct);
                byKey[key] = created;
                inserted++;
            }
        }

        await db.SaveChangesAsync(ct);
        return (inserted, updated);
    }
}