/* ==========================================================================
 * ADMIN NEXT — page-referralhist.jsx  (แยกไฟล์ละหน้า; โหลดผ่าน <script type="text/babel">)
 * ========================================================================== */

/* ---------- ประวัติชวนเพื่อน — /history-referral ---------- */
function ReferralHistoryPage({ toast }) {
  const [rows,setRows]=useState([]),[loading,setLoading]=useState(true),[err,setErr]=useState(null);
  const [q,setQ]=useState(""),[range,setRange]=useState("30d"),[custom,setCustom]=useState({from:bkkDate(29),to:bkkDate(0)});
  const [page,setPage]=useState(1),[size,setSize]=useState(50);
  const debRef=useRef(null);
  const load=useCallback(async(query,rg,cust)=>{ setLoading(true); setErr(null);
    try{ const {from,to}=rangeToDates(rg,cust); const p=new URLSearchParams({limit:"300",from,to}); if(query)p.set("q",query);
      const d=await api("/history-referral?"+p.toString()); setRows(Array.isArray(d)?d:[]); }
    catch(e){ if(e.status===401||e.status===403){window.__nxAuthFail&&window.__nxAuthFail();} setErr(e.status===403?"ไม่มีสิทธิ์ดูประวัติชวนเพื่อน":(e.message||"โหลดไม่สำเร็จ")); }
    finally{ setLoading(false); } },[]);
  useEffect(()=>{ load(q.trim(),range,custom); },[range,load]);
  useEffect(()=>{ if(debRef.current)clearTimeout(debRef.current); debRef.current=setTimeout(()=>load(q.trim(),range,custom),350); return ()=>clearTimeout(debRef.current); },[q]);
  useEffect(()=>{ setPage(1); },[q,range,rows.length]);
  const paged=rows.slice((page-1)*size,page*size);
  const doExport=()=>{ csvDownload("referral-history-"+bkkDate(0)+".csv",[["เวลา","ยูสผู้แนะนำ","ยูสผู้ถูกแนะนำ","ยอด(บาท)","เหตุผล"],...rows.map(r=>[fmtDT(r.created_at),r.referrer_username,r.referred_username,(Number(r.amount||0)/100).toFixed(2),r.reason||""])]); toast("ส่งออกแล้ว"); };
  return (<div className="space-y-3">
    <HistToolbar q={q} setQ={setQ} range={range} setRange={setRange} custom={custom} setCustom={setCustom} onReload={()=>load(q.trim(),range,custom)} onExport={doExport} loading={loading} count={rows.length} placeholder="ค้นหา ผู้แนะนำ / ผู้ถูกแนะนำ…"/>
    {err ? <HistErr msg={err} onRetry={()=>load(q.trim(),range,custom)}/>
    : (<div className="overflow-hidden rounded-xl border border-line bg-surface shadow-sm"><div className="overflow-x-auto"><table className="w-full min-w-[720px] border-collapse text-sm">
      <thead className="border-b-2 border-accent/25 bg-accent-soft"><tr>{histTh("เวลา")}{histTh("ผู้แนะนำ")}{histTh("ผู้ถูกแนะนำ")}{histTh("ยอด","text-right")}{histTh("เหตุผล","pr-4")}</tr></thead>
      <tbody>
        {loading ? Array.from({length:8}).map((_,i)=>(<tr key={i} className="border-b border-line-soft"><td className="px-3 py-3" colSpan="5"><div className="skel h-5 w-full"/></td></tr>))
          : rows.length===0 ? (<tr><td colSpan="5" className="px-4 py-16 text-center text-sm font-medium text-fg-2">ไม่มีรายการ</td></tr>)
          : paged.map((r,i)=>(<tr key={r.id||i} className="border-b border-line-soft transition-colors last:border-0 hover:bg-sunken/50">
            <td className="whitespace-nowrap px-3 py-2.5 text-xs text-fg-2">{fmtDT(r.created_at)}</td>
            <td className="px-3"><div className="min-w-0"><div className="truncate font-semibold text-accent">{r.referrer_username||"-"}</div><div className="truncate mono text-[11px] text-faint">{r.referrer_phone||""}</div></div></td>
            <td className="px-3"><div className="min-w-0"><div className="truncate font-semibold text-accent">{r.referred_username||"-"}</div><div className="truncate mono text-[11px] text-faint">{r.referred_phone||""}</div></div></td>
            <td className="whitespace-nowrap px-3 text-right font-semibold tnum text-success">{money2(r.amount)}</td>
            <td className="pr-4 text-xs text-muted"><span className="truncate">{r.reason||"-"}</span></td>
          </tr>))}
      </tbody>
    </table></div></div>)}
  </div>);
}