import '../../style.scss';
import { cache } from 'react';
import { Metadata } from 'next';
import Link from 'next/link';
import { notFound } from 'next/navigation';
import { fetchBondDetail } from '@/lib/api/seibro';
import { codeLabel, formatAmountCompact, formatDecimal, formatRatePercent, formatShares, dateOrDash } from '@/lib/utils/market';
import {
	BOND_OPTION_LABEL,
	BOND_RATE_CHG_LABEL,
	BOND_GUARANTEE_LABEL,
	BOND_RANK_LABEL,
	BOND_INT_PAY_WAY_LABEL,
	BOND_INT_CYCLE_LABEL,
	BOND_INT_TIMING_LABEL,
	BOND_PARTICUL_KIND_LABEL,
	BOND_SECN_KACD_LABEL
} from '@/types/seibro';

type Props = {
	params: Promise<{
		isin: string;
	}>;
};

// generateMetadata + 본문 이중 호출 방지 (요청 단위 dedupe)
const getDetail = cache(async (isin: string) => {
	return await fetchBondDetail(isin);
});

export async function generateMetadata({ params }: Props): Promise<Metadata>
{
	const { isin } = await params;
	const res = await getDetail(isin);
	const name = res.success && res.data?.master?.name ? res.data.master.name : isin;

	return {
		title: `${name} 채권 상세 — 개미투자`,
		description: `${name}(${isin}) 채권 상세 — 만기·표면이자율·신용등급·이자지급·종가/YTM (SEIBro)`
	};
}

export default async function BondDetailPage({ params }: Props)
{
	const { isin } = await params;
	const res = await getDetail(isin);

	if (!res.success && res.status === 404) {
		return notFound();
	}

	if (!res.success || !res.data) {
		return (
			<div className='market'>
				<Link href='/market/bonds' className='market__detail-back'>← 채권 목록</Link>
				<div className='market__error' role='alert'>
					<strong>채권 정보를 불러오지 못했습니다.</strong>
					잠시 후 다시 시도해 주세요.
				</div>
			</div>
		);
	}

	const detail = res.data;
	const master = detail.master;
	const interest = detail.interest;
	const market = detail.market;
	const name = master?.name ?? detail.isin;
	const grades = [
		{ agency: 'KIS', grade: master?.kisGrade },
		{ agency: 'NICE', grade: master?.niceGrade },
		{ agency: 'SCI', grade: master?.sciGrade },
		{ agency: 'KR', grade: master?.krGrade }
	].filter(c => c.grade);

	return (
		<div className='market'>
			<Link href='/market/bonds' className='market__detail-back'>← 채권 목록</Link>

			<div className='market__head'>
				<h1 className='market__title'>{name}</h1>
				<span className='market__basis'>{detail.isin} · 채권 상세 (SEIBro)</span>
			</div>

			{/* KRX 최신 시세 */}
			{market && (
				<div className='market__spec-card'>
					<h2 className='market__spec-card-title'>최신 시세 <span className='market__basis'>({market.tradeDate} 기준)</span></h2>
					<dl className='market__spec-grid'>
						<div className='market__spec-item'>
							<dt>종가</dt>
							<dd>{formatDecimal(market.close)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>만기수익률(YTM)</dt>
							<dd>{formatRatePercent(market.yieldToMaturity, 3)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>거래량</dt>
							<dd>{formatShares(market.volume)}</dd>
						</div>
					</dl>
				</div>
			)}

			{/* 채권 마스터 */}
			{master ? (
				<div className='market__spec-card'>
					<h2 className='market__spec-card-title'>발행 정보</h2>
					<dl className='market__spec-grid'>
						<div className='market__spec-item'>
							<dt>종목종류</dt>
							<dd>{codeLabel(master.secnKacd, BOND_SECN_KACD_LABEL)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>발행일</dt>
							<dd>{dateOrDash(master.issueDate)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>만기일</dt>
							<dd>{dateOrDash(master.maturityDate)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>표면이자율</dt>
							<dd>{formatRatePercent(master.couponRate, 3)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>통화</dt>
							<dd>{master.currency ?? '—'}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>최초발행금액</dt>
							<dd>{formatAmountCompact(master.firstIssueAmount)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>발행잔액</dt>
							<dd>{formatAmountCompact(master.issueRemaining)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>금리유형</dt>
							<dd>{codeLabel(master.rateChangeTpcd, BOND_RATE_CHG_LABEL)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>보증</dt>
							<dd>{codeLabel(master.guaranteeTpcd, BOND_GUARANTEE_LABEL)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>순위</dt>
							<dd>{codeLabel(master.rankTpcd, BOND_RANK_LABEL)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>이자지급방법</dt>
							<dd>{codeLabel(master.intPayWayTpcd, BOND_INT_PAY_WAY_LABEL)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>옵션</dt>
							<dd>{codeLabel(master.optionTpcd, BOND_OPTION_LABEL)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>특이종류</dt>
							<dd>{codeLabel(master.particularBondKindTpcd, BOND_PARTICUL_KIND_LABEL)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>조기상환</dt>
							<dd>{master.forcedEarlyRedemption === null ? '—' : master.forcedEarlyRedemption ? '있음' : '없음'}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>전자증권</dt>
							<dd>{master.isElectronicSecurity === null ? '—' : master.isElectronicSecurity ? '전자' : '예탁'}</dd>
						</div>
					</dl>

					{grades.length > 0 && (
						<div className='market__grades'>
							{grades.map(c => (
								<div key={c.agency} className='market__grade'>
									<span>{c.agency}</span>
									<strong>{c.grade}</strong>
								</div>
							))}
						</div>
					)}
				</div>
			) : (
				<div className='market__empty'>채권 발행 마스터 정보가 없습니다 (KRX 시세만 수집됨).</div>
			)}

			{/* 이자지급 정보 */}
			{interest && (
				<div className='market__spec-card'>
					<h2 className='market__spec-card-title'>이자지급</h2>
					<dl className='market__spec-grid'>
						<div className='market__spec-item'>
							<dt>표면이자율</dt>
							<dd>{formatRatePercent(interest.couponRate, 3)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>지급방법</dt>
							<dd>{codeLabel(interest.intPayWayTpcd, BOND_INT_PAY_WAY_LABEL)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>지급주기</dt>
							<dd>{interest.cycleTerms ?? '—'}{interest.cycleTpcd ? codeLabel(interest.cycleTpcd, BOND_INT_CYCLE_LABEL) : ''}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>지급시기</dt>
							<dd>{codeLabel(interest.payTimingTpcd, BOND_INT_TIMING_LABEL)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>직전 이표일</dt>
							<dd>{dateOrDash(interest.beforeCouponDate)}</dd>
						</div>
						<div className='market__spec-item'>
							<dt>차기 이표일</dt>
							<dd>{dateOrDash(interest.afterCouponDate)}</dd>
						</div>
					</dl>
				</div>
			)}
		</div>
	);
}