import React, { useEffect, useMemo, useState } from 'react';
import { useTranslation } from 'react-i18next';
import { sanitizeClubName } from '../../utils/url';
import { TeamLogo } from '../common/TeamLogo';

export interface StandingRow {
  position?: number;
  pos?: number;
  rank?: number;
  team?: any;
  team_id?: string | number;
  team_logo_url?: string;
  club?: string;
  points?: number | string;
  pts?: number | string;
  played?: number | string;
  matches?: number | string;
  wins?: number | string;
  win?: number | string;
  draws?: number | string;
  draw?: number | string;
  losses?: number | string;
  loss?: number | string;
  score?: string;
}

 
function deriveTeamIdFromLogoUrl(url?: string): string | undefined {
  try {
    const u = String(url || '');
    if (!u) return undefined;
    const m = u.match(/[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}/);
    return m ? m[0].toLowerCase() : undefined;
  } catch {
    return undefined;
  }
}

type TeamOverrides = { by_id?: Record<string, { name?: string; logo_url?: string }>; by_name?: Record<string, string> };

const StandingsCard: React.FC<{ rows: StandingRow[]; onRowClick?: (row: StandingRow, index: number) => void; variant?: 'logos' | 'plain' }>= ({ rows, onRowClick, variant = 'logos' }) => {
  const { t } = useTranslation();
  const safe = Array.isArray(rows) ? rows : [];
  const [sortKey, setSortKey] = useState<'rank' | 'team' | 'played' | 'wins' | 'draws' | 'losses' | 'score' | 'points' | null>(null);
  const [sortOrder, setSortOrder] = useState<'desc' | 'asc' | null>(null);
  const [overrides, setOverrides] = useState<TeamOverrides>({});
  const toNumber = (v: any): number => {
    if (typeof v === 'number') return v;
    const n = parseFloat(String(v ?? '').replace(/[^0-9\-\.]/g, ''));
    return isNaN(n) ? 0 : n;
  };
  const scoreDiff = (s: any): number => {
    const str = String(s ?? '').trim();
    const m = str.match(/(-?\d+)\s*[:\-]\s*(-?\d+)/);
    if (m) return Number(m[1]) - Number(m[2]);
    return toNumber(str);
  };
  const normalize = (s: string) => String(s || '')
    .normalize('NFD')
    .replace(/[\u0300-\u036f]/g, '')
    .replace(/[\u2012\u2013\u2014\u2015\u2212]/g, '-')
    .replace(/[.,!;:()\[\]{}]/g, ' ')
    .replace(/[\s,]*(z\.?\s*s\.?|o\.?\s*s\.?)\s*$/g, '')
    .replace(/\s+/g, ' ')
    .trim()
    .toLowerCase();

  const byIdMap = useMemo(() => (overrides?.by_id || {}) as Record<string, { name?: string; logo_url?: string }>, [overrides]);
  const overridesNameIndex = useMemo(() => {
    const idx: Record<string, { id: string; name: string }> = {};
    try {
      for (const [id, v] of Object.entries(byIdMap)) {
        const nm = String((v as any)?.name || '').trim();
        if (!nm) continue;
        const key = normalize(nm);
        if (!key) continue;
        idx[key] = { id, name: nm };
      }
    } catch {}
    return idx;
  }, [byIdMap]);

  const pickName = (teamId?: string | number, original?: string, logoUrl?: string): string => {
    const id = String(teamId || '') || deriveTeamIdFromLogoUrl(logoUrl) || '';
    const v = id ? (byIdMap[id]?.name || '') : '';
    if (v && v.trim().length > 0) return v;
    if (original) {
      const n = normalize(original);
      let hit = overridesNameIndex[n];
      if (!hit) {
        for (const [k, val] of Object.entries(overridesNameIndex)) {
          if (!k) continue;
          if (n.endsWith(k) || k.endsWith(n)) { hit = val as any; break; }
        }
      }
      if (hit?.name) return hit.name;
    }
    return original || '';
  };

  useEffect(() => {
    let mounted = true;
    (async () => {
      const now = Date.now();
      let data: any = null;
      try {
        const res = await fetch(`/api/v1/public/team-logo-overrides?t=${now}`, { cache: 'no-cache' });
        if (res.ok) data = await res.json();
      } catch {}
      if (!data) {
        try {
          const res2 = await fetch('/cache/prefetch/team_logo_overrides.json', { cache: 'no-cache' });
          if (res2.ok) data = await res2.json();
        } catch {}
      }
      if (mounted) setOverrides(data || { by_id: {}, by_name: {} });
    })();
    return () => { mounted = false; };
  }, []);

  const getTeam = (r: any): string => sanitizeClubName(pickName(r?.team_id, r?.team?.name ?? r?.team ?? r?.club ?? '', r?.team_logo_url));
  const getRank = (r: any): number => toNumber(r?.rank ?? r?.pos ?? r?.position);
  const toggleSort = (key: 'rank' | 'team' | 'played' | 'wins' | 'draws' | 'losses' | 'score' | 'points') => {
    if (sortKey !== key) { setSortKey(key); setSortOrder('desc'); return; }
    if (sortOrder === 'desc') { setSortOrder('asc'); return; }
    setSortKey(null); setSortOrder(null);
  };
  const sorted = useMemo(() => {
    if (!sortKey || !sortOrder) return safe;
    const arr = [...safe];
    arr.sort((a: any, b: any) => {
      let va: any; let vb: any; let isText = false;
      switch (sortKey) {
        case 'team': va = getTeam(a); vb = getTeam(b); isText = true; break;
        case 'rank': va = getRank(a); vb = getRank(b); break;
        case 'played': va = toNumber(a?.played ?? a?.matches); vb = toNumber(b?.played ?? b?.matches); break;
        case 'wins': va = toNumber(a?.wins ?? a?.win); vb = toNumber(b?.wins ?? b?.win); break;
        case 'draws': va = toNumber(a?.draws ?? a?.draw); vb = toNumber(b?.draws ?? b?.draw); break;
        case 'losses': va = toNumber(a?.losses ?? a?.loss); vb = toNumber(b?.losses ?? b?.loss); break;
        case 'score': va = scoreDiff(a?.score); vb = scoreDiff(b?.score); break;
        case 'points': va = toNumber(a?.points ?? a?.pts); vb = toNumber(b?.points ?? b?.pts); break;
        default: va = 0; vb = 0;
      }
      let res = isText ? String(va).localeCompare(String(vb)) : (va as number) - (vb as number);
      if (sortOrder === 'desc') res = -res;
      if (res === 0) {
        const ra = getRank(a); const rb = getRank(b);
        res = ra - rb;
      }
      return res;
    });
    return arr;
  }, [safe, sortKey, sortOrder]);
  const arrow = (key: 'rank' | 'team' | 'played' | 'wins' | 'draws' | 'losses' | 'score' | 'points') => sortKey === key ? (sortOrder === 'desc' ? ' ▼' : ' ▲') : '';
  return (
    <div className="table-card">
      <div className="standings-table-wrapper" style={{ overflowX: 'auto' }}>
        <table className="standings-table-compact" style={{ width: '100%', borderCollapse: 'separate', borderSpacing: '0 4px' }}>
          <thead>
            <tr style={{ fontSize: '0.75rem', color: 'var(--dark-gray)', textTransform: 'uppercase' }}>
              <th onClick={() => toggleSort('rank')} style={{ padding: '6px 8px', textAlign: 'left', fontWeight: 600, cursor: 'pointer', userSelect: 'none' }}># {arrow('rank')}</th>
              <th onClick={() => toggleSort('team')} style={{ padding: '6px 8px', textAlign: 'left', fontWeight: 600, cursor: 'pointer', userSelect: 'none' }}>{t('homepage.team')}{arrow('team')}</th>
              <th onClick={() => toggleSort('played')} style={{ padding: '6px 4px', textAlign: 'center', fontWeight: 600, cursor: 'pointer', userSelect: 'none' }}>{t('homepage.played')}{arrow('played')}</th>
              <th onClick={() => toggleSort('wins')} style={{ padding: '6px 4px', textAlign: 'center', fontWeight: 600, cursor: 'pointer', userSelect: 'none' }}>{t('homepage.won')}{arrow('wins')}</th>
              <th onClick={() => toggleSort('draws')} style={{ padding: '6px 4px', textAlign: 'center', fontWeight: 600, cursor: 'pointer', userSelect: 'none' }}>{t('homepage.drawn')}{arrow('draws')}</th>
              <th onClick={() => toggleSort('losses')} style={{ padding: '6px 4px', textAlign: 'center', fontWeight: 600, cursor: 'pointer', userSelect: 'none' }}>{t('homepage.lost')}{arrow('losses')}</th>
              <th onClick={() => toggleSort('score')} style={{ padding: '6px 4px', textAlign: 'center', fontWeight: 600, display: 'none', cursor: 'pointer', userSelect: 'none' }} className="hide-mobile">{t('homepage.goals')}{arrow('score')}</th>
              <th onClick={() => toggleSort('points')} style={{ padding: '6px 8px', textAlign: 'center', fontWeight: 600, cursor: 'pointer', userSelect: 'none' }}>{t('homepage.points')}{arrow('points')}</th>
            </tr>
          </thead>
          <tbody>
            {sorted.slice(0, 8).map((row, idx) => {
              const teamNameRaw = (row as any).team?.name ?? (row as any).team ?? (row as any).club ?? '-';
              const teamName = sanitizeClubName(pickName((row as any).team_id, teamNameRaw, (row as any).team_logo_url));
              const tid = (row as any).team_id || deriveTeamIdFromLogoUrl((row as any).team_logo_url);
              return (
                <tr
                  key={idx}
                  onClick={() => onRowClick?.(row, idx)}
                  style={{
                    cursor: onRowClick ? 'pointer' : 'default',
                    background: 'var(--card-bg)',
                    border: '1px solid var(--card-border)',
                    borderRadius: '8px',
                    transition: 'all 0.2s ease',
                  }}
                  onMouseEnter={(e) => {
                    (e.currentTarget as HTMLTableRowElement).style.boxShadow = '0 4px 12px rgba(0,0,0,0.08)';
                    (e.currentTarget as HTMLTableRowElement).style.borderColor = 'var(--primary)';
                  }}
                  onMouseLeave={(e) => {
                    (e.currentTarget as HTMLTableRowElement).style.boxShadow = 'none';
                    (e.currentTarget as HTMLTableRowElement).style.borderColor = 'var(--card-border)';
                  }}
                >
                  <td style={{ padding: '10px 8px', fontWeight: 700, color: 'var(--secondary)' }}>{row.position ?? row.pos ?? row.rank ?? idx + 1}</td>
                  <td style={{ padding: '10px 8px', fontWeight: 600 }}>
                    {variant === 'logos' ? (
                      <span style={{ display: 'inline-flex', alignItems: 'center', gap: 8, minWidth: 0 }}>
                        <TeamLogo
                          teamId={tid}
                          teamName={teamName}
                          facrLogo={(row as any).team_logo_url}
                          size="small"
                          alt={teamName || t('homepage.team')}
                          borderRadius="full"
                        />
                        <span style={{ whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' }}>{teamName}</span>
                      </span>
                    ) : (
                      teamName
                    )}
                  </td>
                  <td style={{ padding: '10px 4px', textAlign: 'center' }}>{(row as any).played ?? (row as any).matches ?? '-'}</td>
                  <td style={{ padding: '10px 4px', textAlign: 'center' }}>{(row as any).wins ?? (row as any).win ?? '-'}</td>
                  <td style={{ padding: '10px 4px', textAlign: 'center' }}>{(row as any).draws ?? (row as any).draw ?? '-'}</td>
                  <td style={{ padding: '10px 4px', textAlign: 'center' }}>{(row as any).losses ?? (row as any).loss ?? '-'}</td>
                  <td style={{ padding: '10px 4px', textAlign: 'center', display: 'none' }} className="hide-mobile">{(row as any).score ?? '-'}</td>
                  <td style={{ padding: '10px 8px', textAlign: 'center', fontWeight: 800 }}>{(row as any).points ?? (row as any).pts ?? '-'}</td>
                </tr>
              );
            })}
          </tbody>
        </table>
      </div>
    </div>
  );
};

export default StandingsCard;