import React, { useEffect, useState, useRef, useCallback } from 'react';
import './ClassiquesDepartsQuais.css';
import supabase from '../../../../lib/supabase';

// Hook pour récupérer la map des logos depuis /type/data.json
function useTypeLogos(){
  const [map, setMap] = useState({ default: '/type/quais/logo-sncf-color.svg' });
  useEffect(() => {
    let mounted = true;

    const load = async () => {
      const candidates = ['/type/quais/data-color.json', '/type/data.json'];
      for(const url of candidates){
        try{
          const res = await fetch(url);
          if(!res.ok) continue;
          const data = await res.json();
          if(!mounted) return;
          const logos = {};
          if(Array.isArray(data.logos)){
            data.logos.forEach(item => {
              // item.file is expected (ex: logo-tgv.svg). If absent, try to extract from path
              let file = item.file;
              if(!file && item.path){
                const parts = String(item.path).split('/');
                file = parts[parts.length-1];
              }
              if(!file) return;
              const basename = file.replace(/\.[^/.]+$/, '');
              const semantic = basename.replace(/^logo-/, '');
              const key = semantic.toUpperCase().replace(/[^A-Z0-9]+/g, '-');
              // Prefer color logos in the 'quais' subfolder if data came from the quais file
              if(url.includes('/quais/')){
                logos[key] = `/type/quais/${file}`;
              } else {
                logos[key] = `/type/${file}`;
              }
            });
          }
          logos.default = logos['SNCF-VOYAGEURS-LOGO'] || logos['SNFC-VOYAGEURS-LOGO'] || logos['SNCF'] || '/type/sncf-voyageurs-logo.png';
          setMap(logos);
          return;
        }catch(e){
          // try next candidate (ignore error and continue loop)
        }
      }
      // no candidate succeeded — keep fallback
    };

    load();
    return () => { mounted = false; };
  }, []);
  return map;
}

function getTypeLogo(type, TYPE_LOGOS_MAP){
  const map = TYPE_LOGOS_MAP || { default: '/type/sncf-voyageurs-logo.png' };
  if(!type) return map.default;
  const norm = String(type).toUpperCase().replace(/[^A-Z0-9]+/g, '-');
  if(map[norm]) return map[norm];
  const keys = Object.keys(map).filter(k => k !== 'default');
  for(const k of keys){
    if(k.includes(norm) || norm.includes(k)) return map[k];
  }
  return map.default;
}

function Clock() {
  const [now, setNow] = useState(new Date());
  useEffect(() => {
    const id = setInterval(() => setNow(new Date()), 1000);
    return () => clearInterval(id);
  }, []);
  const hh = String(now.getHours()).padStart(2,'0');
  const mm = String(now.getMinutes()).padStart(2,'0');
  const ss = String(now.getSeconds()).padStart(2,'0');
  return (
    <div className="aff-quais__clock">
      <div className="aff-quais__clock-box"><span className="aff-quais__clock-main">{hh}:{mm}:{ss}</span></div>
    </div>
  );
}

export default function ClassiquesDepartsQuais(){
  const typeLogos = useTypeLogos();

  const rightRef = useRef(null);
  const stopsListRef = useRef(null);
  const railRef = useRef(null);

  // fallback mock strict (utilisé uniquement si aucune donnée réelle n'est trouvée)
  const mock = {
    time: '16h44',
    status: "à l'heure",
    trainType: 'Fluo',
    trainNumber: '891811',
    destinationBig: 'Seurre',
    destinationStation: '',
    stops: [
      'Ouges','Saulon','Longecourt','Aiserey','Brazey-en-Plaine','Saint-Jean-de-Losne','Chaugey','Pagny','Seurre','Mervans','Louhans','Saint-Amour','Bourg-en-Bresse'
    ],
  };

  // état pour l'horaire sélectionné
  const [selectedHoraire, setSelectedHoraire] = useState(null);
  const [loadingHoraire, setLoadingHoraire] = useState(false);
  const [horaireError, setHoraireError] = useState(null);
  const [candidatesCount, setCandidatesCount] = useState(0);
  // perturbations/travaux (récupérées depuis Supabase)
  const [perturbations, setPerturbations] = useState([]);
  const [, setTravaux] = useState([]);

  // helpers locaux (simples) — similaires à ceux du composant principal
  const normalizeName = useCallback((s) => {
    if (!s) return '';
    try { return String(s).normalize('NFD').replace(/\p{M}/gu,'').toLowerCase().trim().replace(/[-_]+/g,' ').replace(/\s+/g,' '); } catch (e) { return String(s).toLowerCase().trim(); }
  }, []);

  const parseTimeHM = useCallback((s) => {
    if (!s) return null;
    if (typeof s === 'number') return s;
    const m = String(s).match(/(\d{1,2}):(\d{2})/);
    if (m) return parseInt(m[1],10)*60 + parseInt(m[2],10);
    const d = new Date(s);
    if (!isNaN(d.getTime())) return d.getHours()*60 + d.getMinutes();
    return null;
  }, []);

  const formatTimeNoSeconds = useCallback((v) => {
    if (v == null) return '';
    const tryDate = new Date(v);
    if (!isNaN(tryDate.getTime())) {
      const hh = String(tryDate.getHours()).padStart(2,'0');
      const mm = String(tryDate.getMinutes()).padStart(2,'0');
      return `${hh}h${mm}`;
    }
    if (typeof v === 'string') {
      const m = v.match(/(\d{1,2}):(\d{2})(?::\d{2})?/);
      if (m) return `${String(m[1]).padStart(2,'0')}h${m[2]}`;
      const m2 = v.match(/T(\d{2}):(\d{2})/);
      if (m2) return `${m2[1]}h${m2[2]}`;
      return v.slice(0,5).replace(':','h');
    }
    return String(v).slice(0,5).replace(':','h');
  }, []);

  // ...existing code...

  const formatTimeFromHM = useCallback((totalMinutes) => {
    if (typeof totalMinutes !== 'number' || isNaN(totalMinutes)) return '';
    const m = ((totalMinutes % 1440) + 1440) % 1440;
    const hh = String(Math.floor(m / 60)).padStart(2, '0');
    const mm = String(m % 60).padStart(2, '0');
    return `${hh}h${mm}`;
  }, []);

  // lecture des query params pour gare & quai
  const paramsForThis = new URLSearchParams(window.location.search || '');
  const gareParam = paramsForThis.get('gare');
  const gareIdParam = paramsForThis.get('gare_id') || paramsForThis.get('gareId');
  const quaiParam = paramsForThis.get('quai');
  const debugEnabled = (paramsForThis.get('debug') === '1' || String(paramsForThis.get('debug')).toLowerCase() === 'true');
  const gareDisplayParam = gareParam ? decodeURIComponent(String(gareParam).replace(/\+/g,' ')).replace(/-/g,' ') : null;

  // helper: obtenir la liste d'arrêts d'un horaire (supporte plusieurs noms de champs)
  const getStops = (h) => {
    if (!h) return [];
    if (Array.isArray(h.stops) && h.stops.length) return h.stops;
    if (Array.isArray(h.gares_desservies) && h.gares_desservies.length) return h.gares_desservies;
    if (Array.isArray(h.garesDesservies) && h.garesDesservies.length) return h.garesDesservies;
    if (Array.isArray(h.arrets) && h.arrets.length) return h.arrets;
    const candidates = ['stops','gares_desservies','garesDesservies','gares_desservies_json','arrets','gares_desservies_json'];
    for (const key of candidates) {
      const raw = h[key];
      if (!raw) continue;
      if (Array.isArray(raw)) return raw;
      if (typeof raw === 'string') {
        try { const parsed = JSON.parse(raw); if (Array.isArray(parsed)) return parsed; } catch (e) { /* ignore */ }
      }
    }
    return [];
  };

  // --- Helpers pour perturbations (copiées/adaptées depuis ClassiquesDeparts) ---
  const safeParseArrets = (p) => {
    const raw = p && (p.perturbations_arrets || p.arrets || p.arrets_perturbations);
    if (!raw) return [];
    if (Array.isArray(raw)) return raw;
    try {
      const parsed = JSON.parse(raw);
      if (parsed && typeof parsed === 'object') {
        if (Array.isArray(parsed.arrets)) return parsed.arrets;
        return parsed;
      }
      return [];
    } catch (e) { return []; }
  };

  const parsePerturbArretsObject = useCallback((p) => {
    const raw = p && (p.perturbations_arrets || p.arrets || p.arrets_perturbations);
    if (!raw) return { arrets: [], jours: null };
    if (typeof raw === 'object') {
      if (Array.isArray(raw.arrets)) return { arrets: raw.arrets, jours: raw.jours_perturbation || raw.jours || null };
      if (Array.isArray(raw)) return { arrets: raw, jours: null };
      return { arrets: [], jours: null };
    }
    try {
      const parsed = JSON.parse(raw);
      if (parsed && typeof parsed === 'object') {
        return { arrets: Array.isArray(parsed.arrets) ? parsed.arrets : (Array.isArray(parsed) ? parsed : []), jours: parsed.jours_perturbation || parsed.jours || null };
      }
      return { arrets: [], jours: null };
    } catch (e) {
      return { arrets: [], jours: null };
    }
  }, []);

  const getPerturbationJours = useCallback((p) => {
    if (!p) return null;
    const candidate = p.jours_perturbation || p.jours || null;
    const result = new Set();
    const pushDate = (d) => {
      if (!d) return;
      try { const dd = new Date(d); if (!isNaN(dd.getTime())) result.add(dd.toISOString().slice(0,10)); } catch(e){}
    };
    if (candidate) {
      if (Array.isArray(candidate)) candidate.forEach(item => pushDate(item.date || item));
      else if (typeof candidate === 'string') {
        try { const parsed = JSON.parse(candidate); if (Array.isArray(parsed)) parsed.forEach(it => pushDate(it.date || it)); }
        catch (e) { pushDate(candidate); }
      } else if (typeof candidate === 'object') { if (Array.isArray(candidate)) candidate.forEach(it => pushDate(it.date || it)); else pushDate(candidate.date || null); }
    }
    try {
      const parsedObj = parsePerturbArretsObject(p);
      const jp = parsedObj.jours;
      if (jp) {
        if (Array.isArray(jp)) jp.forEach(it => pushDate(it.date || it));
        else if (typeof jp === 'string') {
          try { const parsed = JSON.parse(jp); if (Array.isArray(parsed)) parsed.forEach(it => pushDate(it.date || it)); } catch (e) { pushDate(jp); }
        } else if (typeof jp === 'object') pushDate(jp.date || null);
      }
    } catch (e) {}
    return result.size ? result : null;
  }, [parsePerturbArretsObject]);

  const parseDelayMinutesFromArret = useCallback((arret) => {
    if (!arret) return null;
    const keys = ['retard_minutes','retard','delay_minutes','delay','retard_min'];
    for (const k of keys) {
      if (typeof arret[k] !== 'undefined' && arret[k] !== null && arret[k] !== '') {
        const n = Number(arret[k]); if (!isNaN(n)) return Math.round(n);
      }
    }
    return null;
  }, []);

  const buildPerturbMap = useCallback((list = []) => {
    const idx = { byHoraire: {}, byNumber: {}, byStopId: {}, byStopName: {}, global: [] };
    (list || []).forEach(p => {
      const horaireId = p.horaire_id || p.horaire || p.horaireId || p.horaireID;
      if (horaireId != null) { const k = String(horaireId); idx.byHoraire[k] = idx.byHoraire[k] || []; idx.byHoraire[k].push(p); }
      const number = p.number || p.train_number || p.train || p.numero || p.numero_train;
      if (number != null) { const kn = String(number); idx.byNumber[kn] = idx.byNumber[kn] || []; idx.byNumber[kn].push(p); }
      const arrets = safeParseArrets(p);
      if (Array.isArray(arrets) && arrets.length) {
        arrets.forEach(a => {
          const stopId = a.gare_id || a.gareId || a.id || a.station_id || a.stationId || a.uic || a.code_uic || a.gare_uic || a.code;
          const stopName = a.gare_nom || a.nom || a.name || a.station_name || a.station_nom;
          if (stopId != null) { const ks = String(stopId); idx.byStopId[ks] = idx.byStopId[ks] || []; idx.byStopId[ks].push({ perturbation: p, arret: a }); }
          if (stopName) { const key = normalizeName(stopName); idx.byStopName[key] = idx.byStopName[key] || []; idx.byStopName[key].push({ perturbation: p, arret: a }); }
        });
      }
      if ((horaireId == null && number == null && (!Array.isArray(arrets) || !arrets.length))) { idx.global.push(p); }
    });
    return idx;
  }, [normalizeName]);

  const findPerturbsForHoraireAndStop = useCallback((horaire, stationId, stationName, idx) => {
    const res = [];
    const map = idx || buildPerturbMap(perturbations || []);
    const hId = horaire && (horaire.id || horaire.horaire_id || horaire.numero || horaire.numero_train);
    const number = horaire && (horaire.numero_train || horaire.number || horaire.numero || horaire.train_number);
    if (hId != null) { const kh = String(hId); if (map.byHoraire && map.byHoraire[kh]) res.push(...map.byHoraire[kh]); }
    if (number != null) { const kn = String(number); if (map.byNumber && map.byNumber[kn]) res.push(...map.byNumber[kn]); }
    if (stationId != null) { const ks = String(stationId); if (map.byStopId && map.byStopId[ks]) map.byStopId[ks].forEach(x => res.push(x.perturbation)); }
    if (stationName && map.byStopName) {
      const key = normalizeName(stationName);
      if (map.byStopName[key]) map.byStopName[key].forEach(x => res.push(x.perturbation));
      try {
        const needle = key;
        for (const existingKey of Object.keys(map.byStopName || {})) {
          if (existingKey === needle) continue;
          if (existingKey.includes(needle) || needle.includes(existingKey)) { map.byStopName[existingKey].forEach(x => res.push(x.perturbation)); }
        }
      } catch (e) {}
    }
    return Array.from(new Set(res));
  }, [buildPerturbMap, perturbations, normalizeName]);

  const computeStatusForHoraireAtStop = useCallback((horaire, stationId, stationName, idx, serviceDate = null) => {
    const found = findPerturbsForHoraireAndStop(horaire, stationId, stationName, idx) || [];
    const toYMD = (v) => { if (!v) return null; const d = new Date(v); if (isNaN(d.getTime())) return null; return d.toISOString().slice(0,10); };
    let horaireYmd = toYMD(horaire && (horaire._date || horaire.date || horaire.date_service || horaire.service_date));
    if (!horaireYmd && serviceDate) horaireYmd = serviceDate;
    let maxDelay = null;
    for (const p of found) {
      try {
        if (horaireYmd) {
          const pDate = toYMD(p.date || p.date_service || p.start_date || p.date_debut);
          const db = toYMD(p.date_debut || p.start_date);
          const df = toYMD(p.date_fin || p.end_date);
          if (pDate && pDate !== horaireYmd) continue;
          if (db && df && !(horaireYmd >= db && horaireYmd <= df)) continue;
        }
      } catch (e) {}
      try {
        const joursSet = getPerturbationJours(p);
        if (joursSet && horaireYmd) { if (!joursSet.has(horaireYmd)) continue; }
      } catch (e) {}
      const parsedObj = parsePerturbArretsObject(p) || { arrets: [], jours: null };
      const arrets = parsedObj.arrets || [];
      let matched = false;
      for (const a of arrets) {
        const aId = a.gare_id || a.gareId || a.id || a.station_id || a.stationId || a.uic || a.code;
        const aName = a.gare_nom || a.nom || a.name || a.station_name || a.station_nom;
        const na = normalizeName(aName || '');
        const ns = normalizeName(stationName || '');
        const nameMatches = stationName && (na === ns || na.includes(ns) || ns.includes(na));
        if ((stationId != null && String(aId) === String(stationId)) || nameMatches) {
          matched = true;
          const t = (a.type_perturbation || a.type || '').toString().toLowerCase();
          if (t.includes('arret_supprime') || /suppressed|supprim/.test(t)) return { label: 'supprimé', detail: '', delayMinutes: null };
          if (t.includes('retard') || t.includes('delay') || /retard/.test(t)) {
            const d = parseDelayMinutesFromArret(a) || parseDelayMinutesFromArret(p) || 0;
            if (maxDelay == null || d > maxDelay) maxDelay = d;
          }
        }
      }
      if (!matched) {
        const ref = p.horaire_id || p.horaire || p.horaireId || p.numero_train || p.train_number || p.numero;
        const numberRef = p.number || p.train_number || p.numero || p.numero_train;
        const appliesByRef = ref && (String(ref) === String(horaire.id) || String(ref) === String(horaire.numero_train) || String(ref) === String(horaire.numero));
        const appliesByNumber = numberRef && (String(numberRef) === String(horaire.numero_train) || String(numberRef) === String(horaire.numero) || String(numberRef) === String(horaire.number));
        const isGlobal = (!Array.isArray(arrets) || arrets.length === 0) && !ref && !numberRef;
        if (appliesByRef || appliesByNumber || isGlobal) {
          const t = (p.type_perturbation || p.type || '').toString().toLowerCase();
          if (t.includes('arret_supprime') || /suppressed|supprim/.test(t)) return { label: 'supprimé', detail: '', delayMinutes: null };
          if (t.includes('retard') || t.includes('delay') || /retard/.test(t)) {
            const d = parseDelayMinutesFromArret(p) || 0;
            if (maxDelay == null || d > maxDelay) maxDelay = d;
          }
        }
      }
    }
    if (maxDelay != null) return { label: `retardé +${maxDelay}min.`, detail: '', delayMinutes: maxDelay };
    return { label: "à l'heure", detail: '', delayMinutes: null };
  }, [findPerturbsForHoraireAndStop, parseDelayMinutesFromArret, getPerturbationJours, normalizeName, parsePerturbArretsObject]);

  // Fetch perturbations & travaux from Supabase periodically
  useEffect(() => {
    let mounted = true;
    let inFlight = false;
    const fetchPerturb = async () => {
      if (!mounted) return;
      if (inFlight) return;
      inFlight = true;
      try {
        if (!supabase) return;
        const [{ data: perturbData, error: pError }, { data: travauxData, error: tError }] = await Promise.all([
          supabase.from('perturbations').select('*'),
          supabase.from('travaux').select('*')
        ]);
        if (!mounted) return;
        if (pError || tError) {
          // ignore quietly — keep previous data
        } else {
          // Filter perturbations to those applicable today
          const todayYmd = new Date().toLocaleDateString('en-CA');
          const filteredPerturb = (perturbData || []).filter(p => {
            try {
              const toYMD = (v) => { if (!v) return null; const d = new Date(v); if (isNaN(d.getTime())) return null; return d.toISOString().slice(0,10); };
              const pDate = toYMD(p.date || p.date_service || p.start_date || p.date_debut);
              const db = toYMD(p.date_debut || p.start_date);
              const df = toYMD(p.date_fin || p.end_date);
              if (pDate && pDate !== todayYmd) return false;
              if (db && df && !(todayYmd >= db && todayYmd <= df)) return false;
              try { const joursSet = getPerturbationJours(p); if (joursSet && !joursSet.has(todayYmd)) return false; } catch (e) {}
              return true;
            } catch (e) { return true; }
          });
          setPerturbations(filteredPerturb || []);
          setTravaux(travauxData || []);
        }
      } catch (e) {
        // ignore
      } finally {
        inFlight = false;
      }
    };
    fetchPerturb();
    const id = setInterval(fetchPerturb, 15000);
    return () => { mounted = false; clearInterval(id); };
  }, [getPerturbationJours]);

  // Annotate selectedHoraire with computed status when perturbations change
  useEffect(() => {
    if (!selectedHoraire || !selectedHoraire.horaire) return;
    const horaire = selectedHoraire.horaire;
    const stop = selectedHoraire.stop || null;
    const stationId = stop ? (stop.gare_id || stop.gareId || stop.id || stop.stop_id || stop.stopId) : null;
    const stationName = stop ? (typeof stop === 'string' ? stop : (stop.gare_nom || stop.nom || stop.name || stop.stop_name || '')) : null;
    try {
      const map = buildPerturbMap(perturbations || []);
      const status = computeStatusForHoraireAtStop(horaire, stationId, stationName, map, null);
      // keep original scheduled time for display (_displayTime)
      const originalBase = parseTimeHM(selectedHoraire.rawTime || horaire.heure_depart || horaire.time || horaire.heure);
      const displayTimeOriginal = (typeof originalBase === 'number') ? formatTimeFromHM(originalBase) : (selectedHoraire.rawTime ? formatTimeNoSeconds(selectedHoraire.rawTime) : (horaire.heure_depart || horaire.time || horaire.heure ? formatTimeNoSeconds(horaire.heure_depart || horaire.time || horaire.heure) : null));
      // compute updated time (delayed) but store separately — do not override the original displayed time
      let updatedTime = null;
      if (status && typeof status.delayMinutes === 'number' && !Number.isNaN(status.delayMinutes) && typeof originalBase === 'number') {
        updatedTime = formatTimeFromHM(originalBase + status.delayMinutes);
      }
      setSelectedHoraire(prev => ({ ...(prev||{}), horaire: { ...(prev && prev.horaire ? prev.horaire : {}), _status: status }, _displayTime: displayTimeOriginal, _updatedTime: updatedTime }));
    } catch (e) { /* ignore */ }
  }, [selectedHoraire, perturbations, buildPerturbMap, computeStatusForHoraireAtStop, parseTimeHM, formatTimeFromHM, formatTimeNoSeconds]);

  // récupérer depuis Supabase le prochain départ correspondant au couple (gare, quai)
  useEffect(() => {
    let mounted = true;
    async function loadNextForQuai() {
      setLoadingHoraire(true);
      setHoraireError(null);
      setSelectedHoraire(null);
      if (!supabase) {
        setHoraireError('Supabase non initialisé');
        setLoadingHoraire(false);
        return;
      }
      try {
        const { data: all, error } = await supabase.from('horaires').select('id, *');
        if (error) {
          if (mounted) setHoraireError(error.message || String(error));
          setLoadingHoraire(false);
          return;
        }
        if (!mounted) return;
        if (!Array.isArray(all) || all.length === 0) {
          setLoadingHoraire(false);
          return;
        }

        const normalizedTarget = gareDisplayParam ? normalizeName(gareDisplayParam) : null;
        const targetQuai = quaiParam ? String(quaiParam).toLowerCase().replace(/\s+/g,'') : null;

        const now = new Date();
        const nowHM = now.getHours()*60 + now.getMinutes();

        const candidates = [];

        for (const h of all) {
          if (!h) continue;
          // build stops list (support multiple field names)
          const stops = getStops(h);

          // compute max index for terminus detection if stops contain index
          let maxIdx = null;
          if (Array.isArray(stops) && stops.length) {
            for (const st of stops) {
              if (typeof st.index !== 'undefined' && st.index !== null) {
                const n = Number(st.index);
                if (!Number.isNaN(n)) maxIdx = maxIdx == null ? n : Math.max(maxIdx, n);
              }
            }
          }

          // find matching stop (by name or by gare_id)
          let stopMatch = null;
          // check horaire-level depart name first
          if (normalizedTarget) {
            // exclude horaires where the target gare is the final destination (terminus)
            const destNameNorm = normalizeName(h.gare_arrivee_nom || h.gare_arrivee || '');
            if (destNameNorm && (destNameNorm === normalizedTarget || destNameNorm.includes(normalizedTarget) || normalizedTarget.includes(destNameNorm))) {
              // gare ciblée est la gare d'arrivée finale -> ne pas considérer cet horaire
              // skip to next horaire
            } else {
              const departName = normalizeName(h.gare_depart_nom || h.gare_depart || h.origin_name || '');
              if (departName && (departName === normalizedTarget || departName.includes(normalizedTarget) || normalizedTarget.includes(departName))) {
                // créer un stopMatch initial à partir du niveau horaire
                let initialStop = { heure_depart: h.heure_depart || h.time || h.heure, gare_nom: h.gare_depart_nom || h.gare_depart };
                // si la liste stops contient un objet correspondant à la gare de départ, préférer cet objet
                if (Array.isArray(stops) && stops.length) {
                  for (const s of stops) {
                    const rawName = (typeof s === 'string') ? s : (s.gare_nom || s.nom || s.name || s.stop_name || s.station || '');
                    const nm = normalizeName(rawName);
                    if (!nm) continue;
                    if (nm === normalizedTarget || nm.includes(normalizedTarget) || normalizedTarget.includes(nm)) {
                      // prefer the stops entry (it may contain platform/quai information)
                      // but preserve a horaire-level time if the stop entry lacks heure_depart
                      if (typeof s === 'object') {
                        if (!s.heure_depart && initialStop.heure_depart) s.heure_depart = initialStop.heure_depart;
                        initialStop = s;
                      } else {
                        // s is string name — keep initialStop but set gare_nom
                        initialStop.gare_nom = s;
                      }
                      break;
                    }
                  }
                }
                stopMatch = initialStop;
              }
            }
          }

          // if gare_id param present, try to match by id as well
          if (!stopMatch && gareIdParam) {
            const gid = String(gareIdParam);
            // check horaire-level id
            const departId = h.gare_depart_id || h.gare_id || h.origin_id || null;
            if (departId != null && String(departId) === gid) {
              stopMatch = { heure_depart: h.heure_depart || h.time || h.heure, gare_id: departId, gare_nom: h.gare_depart_nom || h.gare_depart };
            }
            // check stops list ids
            if (!stopMatch && Array.isArray(stops) && stops.length) {
              for (const s of stops) {
                const sid = s.gare_id || s.gareId || s.id || s.stop_id || s.stopId || null;
                if (sid != null && String(sid) === gid) { stopMatch = s; break; }
              }
            }
          }

          // if still no match, try match by normalized name inside stops
          if (!stopMatch && normalizedTarget && Array.isArray(stops) && stops.length) {
            for (const s of stops) {
              // support both string entries and object entries
              const rawName = (typeof s === 'string') ? s : (s.gare_nom || s.nom || s.name || s.stop_name || s.stopName || s.station || s.station_name || '');
              const nm = normalizeName(rawName);
              if (!nm) continue;
              if (nm === normalizedTarget || nm.includes(normalizedTarget) || normalizedTarget.includes(nm)) {
                // detect if this stop is a terminus (isLast / is_last / index == maxIdx)
                const isTerminus = Boolean((typeof s === 'object') && (s.isLast || s.is_last || s.isTerminus || (typeof s.index !== 'undefined' && maxIdx != null && Number(s.index) === maxIdx)));
                if (isTerminus) continue; // ne pas considérer les terminus
                stopMatch = s;
                break;
              }
            }
          }
          if (!stopMatch) continue; // this horaire does not serve the target gare (or match failed)

          // determine platform/quai for this stop/horaire
          const platform = (stopMatch && (stopMatch.quai || stopMatch.platform || stopMatch.quay)) || h.platform || h.quai || '';
          const normPlatform = String(platform || '').toLowerCase().replace(/\s+/g,'');

          // if targetQuai is set, ensure it matches (loose compare: contains or equals)
          if (targetQuai) {
            if (!normPlatform) continue; // no platform info -> skip
            if (!(normPlatform === targetQuai || normPlatform.includes(targetQuai) || targetQuai.includes(normPlatform))) continue;
          }

          // Ne garder que les horaires qui ont un départ au stop (on ne veut pas afficher les arrivées)
          const stopIsObject = stopMatch && typeof stopMatch === 'object';
          const hasDeparture = stopIsObject && (
            typeof stopMatch.heure_depart !== 'undefined' || typeof stopMatch.departure_time !== 'undefined' || typeof stopMatch.departure !== 'undefined' || typeof stopMatch.time !== 'undefined' || typeof stopMatch.departureTime !== 'undefined' || typeof stopMatch.horaire_time !== 'undefined'
          );
          const hasArrivalOnly = stopIsObject && !hasDeparture && (
            typeof stopMatch.heure_arrivee !== 'undefined' || typeof stopMatch.arrival_time !== 'undefined' || typeof stopMatch.arrivee !== 'undefined' || typeof stopMatch.arrival !== 'undefined'
          );
          // si le stop correspond mais n'a que l'heure d'arrivée (pas de départ), ignorer cet horaire — on veut uniquement des départs
          if (stopIsObject && hasArrivalOnly) continue;

          // pick time from stopMatch (si on a une heure de départ) ou fallback au niveau horaire
          const rawTime = (hasDeparture ? (stopMatch.heure_depart || stopMatch.time || stopMatch.heure || stopMatch.departure_time || stopMatch.departure || stopMatch.departureTime || stopMatch.horaire_time) : (h.heure_depart || h.time || h.heure || h.departure_time || h.departure || h.departureTime || h.horaire_time));
          const depHM = parseTimeHM(rawTime);
          if (depHM == null) continue;

          // compute minutes until departure (allow next-day wrap)
          let minutesUntil = depHM - nowHM;
          if (minutesUntil < 0) minutesUntil = depHM + 24*60 - nowHM;

          candidates.push({ horaire: h, stop: stopMatch, depHM, minutesUntil, rawTime });
        }

        if (!candidates.length) {
          setCandidatesCount(0);
          setLoadingHoraire(false);
          setSelectedHoraire(null);
          return;
        }

        // split into today (depHM > nowHM) and tomorrow (depHM <= nowHM)
        const todayCandidates = candidates.filter(c => c.depHM > nowHM).sort((a,b) => a.depHM - b.depHM);
        const tomorrowCandidates = candidates.filter(c => c.depHM <= nowHM).sort((a,b) => a.depHM - b.depHM);

        let chosen = null;
        if (todayCandidates.length > 0) chosen = todayCandidates[0];
        else if (tomorrowCandidates.length > 0) chosen = tomorrowCandidates[0];

        if (mounted) {
          setCandidatesCount(candidates.length);
          setSelectedHoraire(chosen || null);
        }
      } catch (err) {
        console.error('Erreur supabase quai', err);
        if (mounted) setHoraireError(err.message || String(err));
      } finally {
        if (mounted) setLoadingHoraire(false);
      }
    }

    loadNextForQuai();
    return () => { mounted = false; };
  }, [gareDisplayParam, gareIdParam, quaiParam, parseTimeHM, normalizeName]);

  // toggle flag to alternate time/status when needed (observe selectedHoraire.status when present)
  const [showTime, setShowTime] = useState(true);
  // derive a simple status label string to use in the dependency array (avoids complex expressions)
  const _selectedStatusLabel = (() => {
    const horaireObj = selectedHoraire && selectedHoraire.horaire ? selectedHoraire.horaire : null;
    const computedLabel = horaireObj && horaireObj._status && horaireObj._status.label ? String(horaireObj._status.label) : null;
    const rawStatus = horaireObj && horaireObj.status ? (typeof horaireObj.status === 'string' ? horaireObj.status : (horaireObj.status && horaireObj.status.label ? String(horaireObj.status.label) : null)) : null;
    return String(computedLabel || rawStatus || mock.status || '').toLowerCase();
  })();

  useEffect(()=>{
    let id = null;
    if (/retard|supprim/.test(_selectedStatusLabel)) {
      // ensure we start by showing the time
      setShowTime(true);
      id = setInterval(() => setShowTime(prev => !prev), 3000);
    } else {
      setShowTime(true);
    }
    return () => { if (id) clearInterval(id); };
  }, [_selectedStatusLabel, mock.status]);

  // compute and position the rail so it covers from first stop center to last stop center
  useEffect(() => {
    function updateRail(){
      const rail = railRef.current;
      const list = stopsListRef.current;
      const right = rightRef.current;
      if(!rail || !list || !right) return;
      const items = Array.from(list.querySelectorAll('li'));
      if(items.length === 0) return;
      const first = items[0];
      // find destination (last with dest class) or fallback to last item
      const last = items.find(el => el.classList.contains('aff-quais__stop--strict-dest')) || items[items.length-1];

      const rightRect = right.getBoundingClientRect();
      const firstRect = first.getBoundingClientRect();
      const lastRect = last.getBoundingClientRect();

      const firstCenterY = firstRect.top + firstRect.height/4 - rightRect.top;
      const lastCenterY = lastRect.top + lastRect.height/2 - rightRect.top;

      // add small padding so rail extends a bit beyond centers
      const pad = 9;
      const top = Math.max(0, firstCenterY - pad);
      const height = Math.max(8, (lastCenterY - firstCenterY) + pad*2);

      // compute horizontal position so dots are centered next to the text
      const firstText = first.querySelector('.aff-quais__stop-text--strict') || first.querySelector('.aff-quais__stop-text');
      const textRect = firstText ? firstText.getBoundingClientRect() : firstRect;
      const centerX = (textRect.left - rightRect.left) - 28; // place rail left of text by ~20px
      const railWidth = 35;
      const left = centerX - railWidth/2;

      // apply styles for the rail rectangle
      rail.style.top = `${Math.round(top)}px`;
      rail.style.height = `${Math.round(height)}px`;
      rail.style.left = `${Math.round(left)}px`;
      rail.style.width = `${railWidth}px`;
      // remove background-image reliance and render individual dots as DOM children
      // clear existing dots
      while (rail.firstChild) rail.removeChild(rail.firstChild);

      // create a dot element for each item and position it exactly at the item's vertical center
      const railWidthComputed = parseInt(rail.style.width, 8) || railWidth;
      items.forEach(it => {
        const r = it.getBoundingClientRect();
        const centerY = r.top + r.height/2 - (rightRect.top + top);
        const dot = document.createElement('span');
        dot.className = 'aff-quais__rail-dot';
        dot.style.position = 'absolute';
        dot.style.left = '50%';
        dot.style.transform = 'translate(-50%, -50%)';
        dot.style.top = `${Math.round(centerY)}px`;
        // set dot diameter to rail width
        dot.style.width = `${railWidthComputed}px`;
        dot.style.height = `${railWidthComputed}px`;
        dot.style.borderRadius = '50%';
        dot.style.background = '#ffe600';
        dot.style.boxShadow = '0 0 0 4px rgba(255,230,102,0.06) inset';
        rail.appendChild(dot);
      });
    }

    updateRail();
    window.addEventListener('resize', updateRail);
    const obs = new MutationObserver(updateRail);
    const listNode = stopsListRef.current;
    if(listNode) obs.observe(listNode, { childList:true, subtree:true });
    return ()=>{
      window.removeEventListener('resize', updateRail);
      if(obs) obs.disconnect();
    };
  }, [selectedHoraire]);
  // Observer changement des stops via selectedHoraire
  // Re-run rail effect lorsque selectedHoraire change (les stops affichés changent)

  const displayTimeOrStatus = () => {
    const horaire = selectedHoraire && selectedHoraire.horaire ? selectedHoraire.horaire : null;
    const statusStrFromField = horaire ? (horaire.status || mock.status) : mock.status;
    const statusObj = horaire && horaire._status ? horaire._status : null;
    // prefer precomputed _displayTime if available
    const time = selectedHoraire && selectedHoraire._displayTime ? selectedHoraire._displayTime : (horaire ? formatTimeNoSeconds(selectedHoraire.rawTime || horaire.heure_depart || horaire.time || horaire.heure) : mock.time);

    // build canonical status label when we have computed status object
    let canonicalStatus = null;
    if (statusObj) {
      if (typeof statusObj.delayMinutes === 'number' && !Number.isNaN(statusObj.delayMinutes)) {
        canonicalStatus = `retardé +${Math.round(statusObj.delayMinutes)} min.`;
      } else if (statusObj.label && String(statusObj.label).toLowerCase().includes('supprim')) {
        canonicalStatus = 'supprimé';
      } else if (statusObj.label) {
        canonicalStatus = String(statusObj.label);
      }
    }

    const s = (canonicalStatus || statusStrFromField || '').toLowerCase();
    const isAlert = s.includes('retard') || s.includes('supprim');
    const label = canonicalStatus || statusStrFromField || '';
    // Always render both time and status inside a fixed-size wrapper to avoid layout shift
    return (
      <span className="aff-quais__time-status-wrapper" aria-live="polite">
        <span className={`aff-quais__time aff-quais__time--strict ${showTime ? 'visible' : 'hidden'}`}>{time}</span>
        <span className={`aff-quais__time-status aff-quais__time-status--strict aff-quais__status--alert ${(!showTime && isAlert) ? 'visible' : 'hidden'}`}>{label}</span>
      </span>
    );
  }

    return (
    <div className="aff-quais__container aff-quais__container--strict aff-quais__container--depart">
      <div className="aff-quais__left aff-quais__left--strict">
        {/* logo (depuis le type de train) */}
        {(() => {
          const horaire = selectedHoraire && selectedHoraire.horaire ? selectedHoraire.horaire : null;
          const trainType = horaire ? (horaire.trainType || horaire.train_type || horaire.type_train || horaire.op || horaire.operator) : mock.trainType;
          return <img src={getTypeLogo(trainType, typeLogos)} alt={trainType || 'train'} className="aff-quais__type-logo--strict" />;
        })()}

        <div className="aff-quais__watermark" aria-hidden>départ</div>
        {/* affichage des états de chargement / erreur pour debug */}
        {horaireError ? <div className="aff-quais__error" style={{color:'crimson',fontSize:'0.9rem',marginTop:6}}>{horaireError}</div> : null}
        {loadingHoraire ? <div className="aff-quais__loading" style={{color:'#666',fontSize:'0.85rem',marginTop:6}}>Chargement...</div> : null}
        {debugEnabled ? (
          <div style={{marginTop:8, fontSize:'0.78rem', color:'#333'}}>
            <div>Candidates: {candidatesCount}</div>
            {selectedHoraire ? <pre style={{maxHeight:120,overflow:'auto',background:'#f7f7f7',padding:6}}>{JSON.stringify(selectedHoraire, null, 2)}</pre> : null}
          </div>
        ) : null}
        {/* logo du type en haut à droite */}
        <div className="aff-quais__row aff-quais__row--time-status">
          {(() => {
            const horaire = selectedHoraire && selectedHoraire.horaire ? selectedHoraire.horaire : null;
            const status = horaire ? (horaire.status || (horaire._status && horaire._status.label) || mock.status) : mock.status;
            const time = horaire ? formatTimeNoSeconds(selectedHoraire.rawTime || horaire.heure_depart || horaire.time || horaire.heure) : mock.time;
            const isAlert = (status || '').toLowerCase().includes('retard') || (status || '').toLowerCase().includes('supprim');
            if (isAlert) return displayTimeOrStatus();
            return (
              <>
                <span className="aff-quais__time aff-quais__time--strict">{time}</span>
                <span className="aff-quais__time-status aff-quais__time-status--strict">{status}</span>
              </>
            );
          })()}
        </div>
        <div className="aff-quais__destination aff-quais__destination--strict">
          {(() => {
            const horaire = selectedHoraire && selectedHoraire.horaire ? selectedHoraire.horaire : null;
            const stop = selectedHoraire && selectedHoraire.stop ? selectedHoraire.stop : null;
            // destinationBig is the final destination of the train (gare_arrivee_*). The second line should be the station name of the stop on the route (if present) — avoid duplicating final destination.
            const destinationBig = horaire ? (horaire.gare_arrivee_nom || horaire.gare_arrivee || horaire.destination || '') : mock.destinationBig;
            const rawDestExpr = (stop ? ((typeof stop === 'string') ? stop : (stop.gare_nom || stop.nom || stop.name || stop.stop_name || '')) : (horaire ? (horaire.destination_station || '') : mock.destinationStation));
            return (
              <>
                <div className="aff-quais__destination-line1 aff-quais__destination-line1--strict">{destinationBig}</div>
                {(rawDestExpr && destinationBig && normalizeName(rawDestExpr) !== normalizeName(destinationBig)) ? (
                  <div className="aff-quais__destination-line2 aff-quais__destination-line2--strict">{rawDestExpr}</div>
                ) : null}
              </>
            );
          })()}
        </div>
        <div className="aff-quais__train-id aff-quais__train-id--strict">{(() => {
          const horaire = selectedHoraire && selectedHoraire.horaire ? selectedHoraire.horaire : null;
          const trainType = horaire ? (horaire.trainType || horaire.train_type || horaire.type_train || horaire.op || horaire.operator) : mock.trainType;
          const trainNumber = horaire ? (horaire.numero_train || horaire.numero || horaire.number || '') : mock.trainNumber;
          return (<>{trainType}&nbsp;&nbsp;<span className="aff-quais__train-number--strict">{trainNumber}</span></>);
        })()}</div>
      </div>
      <div className="aff-quais__separator--strict" aria-hidden></div>
      <div className="aff-quais__right aff-quais__right--strict" ref={rightRef}>
        {/* barre verticale de points (élément explicite pour fiabilité) */}
        <div className="aff-quais__stops-rail" aria-hidden ref={railRef} />
        <ul className="aff-quais__stops-list--strict" ref={stopsListRef}>
          {(() => {
            const horaire = selectedHoraire && selectedHoraire.horaire ? selectedHoraire.horaire : null;
            // utiliser la helper getStops pour supporter plusieurs formats
            let stops = horaire ? getStops(horaire) : [];
            if (!Array.isArray(stops) || stops.length === 0) {
              // fallback parsing si la colonne est une chaîne JSON
              if (horaire && typeof horaire.stops === 'string') {
                try { const p = JSON.parse(horaire.stops); if (Array.isArray(p)) stops = p; } catch (e) { /* ignore */ }
              }
            }
            if (!Array.isArray(stops) || stops.length === 0) stops = mock.stops || [];

            // construire une liste propre en extrayant un label pour chaque stop
            const labeled = stops.map((stop, idx) => {
              let label = '';
              if (typeof stop === 'string') label = stop;
              else if (stop && typeof stop === 'object') {
                // vérifier plusieurs clés possibles
                label = stop.gare_nom || stop.nom || stop.name || stop.stop_name || stop.stopName || stop.station_name || stop.station || stop.label || stop.stop || stop.name_gare || (stop.properties && (stop.properties.name || stop.properties.stop_name)) || '';
                // si l'objet possède une clé 'stop' qui est elle-même un objet
                if (!label && stop.stop && typeof stop.stop === 'object') {
                  label = stop.stop.name || stop.stop.stop_name || '';
                }
              }
              label = String(label || '').trim();
              return { label, original: stop, idx };
            }).filter(it => it.label);

            if (labeled.length === 0) return null;

            // trouver l'index du stop correspondant à la gare demandée (selectedHoraire.stop)
            let matchedIndex = -1;
            try {
              if (selectedHoraire && selectedHoraire.stop) {
                const target = selectedHoraire.stop;
                const targetName = (typeof target === 'string') ? normalizeName(target) : normalizeName((target.gare_nom || target.nom || target.name || target.stop_name || target.station || ''));
                const targetId = (typeof target === 'object') ? (target.gare_id || target.gareId || target.id || target.stop_id || target.stopId || null) : null;
                for (let i = 0; i < stops.length; i++) {
                  const s = stops[i];
                  // compare by id first if available
                  if (targetId != null) {
                    const sid = (s && typeof s === 'object') ? (s.gare_id || s.gareId || s.id || s.stop_id || s.stopId || null) : null;
                    if (sid != null && String(sid) === String(targetId)) { matchedIndex = i; break; }
                  }
                  const name = (typeof s === 'string') ? normalizeName(s) : normalizeName((s && (s.gare_nom || s.nom || s.name || s.stop_name || s.station || '')) || '');
                  if (name && targetName && name === targetName) { matchedIndex = i; break; }
                }
              }
            } catch (e) { /* ignore */ }

            // filtrer pour ne garder que les prochains arrêts après la gare renseignée
            let subsequent = labeled.filter(it => (matchedIndex >= 0) ? (it.idx > matchedIndex) : true);
            // trier par idx pour être sûr
            subsequent = subsequent.sort((a,b) => a.idx - b.idx);
            // Remove consecutive duplicate labels (case-insensitive)
            if (subsequent.length > 1) {
              const collapsed = [];
              for (const it of subsequent) {
                const prev = collapsed.length ? String(collapsed[collapsed.length-1].label).trim().toLowerCase() : null;
                const cur = it.label ? String(it.label).trim().toLowerCase() : '';
                if (cur && prev && prev === cur) {
                  continue;
                }
                collapsed.push(it);
              }
              subsequent = collapsed;
            }
            // si aucun arrêt après (ou pas de match) on peut retourner null ou le fallback; ici on renvoie le fallback si tout échoue
            if (subsequent.length === 0) return null;

            return subsequent.map((item, mapIndex) => {
              const isLast = item.idx === (stops.length - 1);
              return (
                <li key={`${item.label}-${item.idx}-${mapIndex}`} className={isLast ? 'aff-quais__stop--strict aff-quais__stop--strict-dest' : 'aff-quais__stop--strict'}>
                  <span className="aff-quais__stop-bullet--strict" />
                  <span className="aff-quais__stop-text--strict">{item.label}</span>
                </li>
              );
            });
          })()}
        </ul>
      </div>
      {/* footer band same as classic departures with clock on the right */}
      <div className="aff-quais__footer" aria-hidden>
        <div className="aff-quais__footer-inner">
          <div className="aff-quais__footer-left"></div>
          <div className="aff-quais__footer-right"><Clock /></div>
        </div>
      </div>
    </div>
  );
}