using System.ComponentModel.DataAnnotations;

namespace Domain.Entities.Stocks;

/// <summary>
/// 사회책임투자채권(SRI) 정보 스냅샷 (KRX OpenAPI esg/sri_bond_info) — (Code, TradeDate) UNIQUE.
/// 채권 일별매매(BondDailyTrade)와 달리 가격/거래량이 아니라 발행 정보(발행기관·채권종류·발행일·상환일·표면이자율·발행금액 등) 레지스트리다.
/// 응답이 basDd 파라미터로 그날 상장된 SRI 채권 전량을 반환하므로(스냅샷) 종목마다 여러 basDd 행이 생긴다 → (Code=표준코드, TradeDate=기준일자)로 UQ.
/// 표준코드(ISU_CD)는 12자리 ISIN. 날짜(LIST_DD/ISU_DD/REDMPT_DD)는 yyyyMMdd 미제공/오류 시 null. 금액은 원 단위 long, 표면이자율은 decimal(9,5)%.
/// </summary>
public class SriBond
{
    [Key]
    public long ID { get; private set; }

    /// <summary>표준코드 (ISU_CD) — 12자리 ISIN. UQ 키의 일부</summary>
    public string Code { get; private set; } = default!;

    /// <summary>기준일자 (BAS_DD) — 스냅샷 일자. UQ 키의 일부</summary>
    public DateOnly TradeDate { get; private set; }

    /// <summary>발행기관 (ISUR_NM)</summary>
    public string IssuerName { get; private set; } = default!;

    /// <summary>채권종류 (SRI_BND_TP_NM, 예: "녹색채권"/"사회적채권"/"지속가능채권")</summary>
    public string SriBondType { get; private set; } = default!;

    /// <summary>종목명 (ISU_NM)</summary>
    public string Name { get; private set; } = default!;

    /// <summary>상장일 (LIST_DD) — 미제공 시 null</summary>
    public DateOnly? ListDate { get; private set; }

    /// <summary>발행일 (ISU_DD) — 미제공 시 null</summary>
    public DateOnly? IssueDate { get; private set; }

    /// <summary>상환일 (REDMPT_DD) — 미제공 시 null</summary>
    public DateOnly? RedemptionDate { get; private set; }

    /// <summary>표면이자율 % (ISU_RT) — 미제공 시 null</summary>
    public decimal? CouponRate { get; private set; }

    /// <summary>발행금액 (ISU_AMT, 원)</summary>
    public long IssueAmount { get; private set; }

    /// <summary>상장금액 (LIST_AMT, 원)</summary>
    public long ListAmount { get; private set; }

    /// <summary>채권유형 (BND_TP_NM, 예: "회사채") — 미제공 시 null</summary>
    public string? BondType { get; private set; }

    public DateTime CreatedAt { get; private set; } = DateTime.UtcNow;

    private SriBond() { }

    public static SriBond Create(
        string code,
        DateOnly tradeDate,
        string issuerName,
        string sriBondType,
        string name,
        DateOnly? listDate,
        DateOnly? issueDate,
        DateOnly? redemptionDate,
        decimal? couponRate,
        long issueAmount,
        long listAmount,
        string? bondType
    ) {
        if (string.IsNullOrWhiteSpace(code))
        {
            throw new ArgumentException("code required", nameof(code));
        }

        if (string.IsNullOrWhiteSpace(issuerName))
        {
            throw new ArgumentException("issuerName required", nameof(issuerName));
        }

        if (string.IsNullOrWhiteSpace(name))
        {
            throw new ArgumentException("name required", nameof(name));
        }

        return new SriBond
        {
            Code = code.Trim(),
            TradeDate = tradeDate,
            IssuerName = issuerName.Trim(),
            SriBondType = sriBondType.Trim(),
            Name = name.Trim(),
            ListDate = listDate,
            IssueDate = issueDate,
            RedemptionDate = redemptionDate,
            CouponRate = couponRate,
            IssueAmount = issueAmount,
            ListAmount = listAmount,
            BondType = bondType
        };
    }

    /// <summary>동일 (Code, TradeDate) 재수집 시 값 갱신 (upsert)</summary>
    public void Update(
        string issuerName,
        string sriBondType,
        string name,
        DateOnly? listDate,
        DateOnly? issueDate,
        DateOnly? redemptionDate,
        decimal? couponRate,
        long issueAmount,
        long listAmount,
        string? bondType
    ) {
        IssuerName = issuerName.Trim();
        SriBondType = sriBondType.Trim();
        Name = name.Trim();
        ListDate = listDate;
        IssueDate = issueDate;
        RedemptionDate = redemptionDate;
        CouponRate = couponRate;
        IssueAmount = issueAmount;
        ListAmount = listAmount;
        BondType = bondType;
    }
}