"use client";
/**
 * TEE OFF SYSTEM INSTRUCTIONS - FACILITY CARDS v3.8 (BLOB SEARCH)
 * ---------------------------------------------------------------------------
 * REGEL 1: Status-badge SKAL vises øverst til venstre FOR ALLE BANER.
 * Bruk STATUS_MAP for tekst.
 * REGEL 2: DATA-PARSING: Bruk parseJson() for 'course_statuses', 'amenities' og 'nsg_data'.
 * REGEL 3: Avstand-pillen skal ha fargen #2d3319 (Mørk oliven) med hvit tekst.
 * REGEL 4: NSG (Blå 'N') og Golfamore (Oransje 'G') sirkler skal ha hvit kant (border-2).
 * REGEL 5: Bunnen: Antall Hull (grønn pill), Banetype (grå pill), og Ikon-sirkler.
 * REGEL 6: Viser dato (f.eks "05. mars 2026") rett til høyre for øverste status-pille.
 * REGEL 7: Natural Language Search bruker en "Search Blob" for å støtte delvise 
 * ord og skrivefeil slik at listen ikke tømmes mens brukeren skriver.
 * ---------------------------------------------------------------------------
 */

import { STATUS_MAP, REGIONS } from "@/config/constants";
import { useState, useEffect, useMemo } from 'react';
import Link from 'next/link';

function getDistance(lat1: number, lon1: number, lat2: number, lon2: number) {
  try {
    const R = 6371;
    const dLat = (lat2 - lat1) * Math.PI / 180;
    const dLon = (lon2 - lon1) * Math.PI / 180;
    const a = Math.sin(dLat/2) * Math.sin(dLat/2) + Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) * Math.sin(dLon/2) * Math.sin(dLon/2);
    return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
  } catch (e) { return Infinity; }
}

export default function FacilitySearch({ initialFacilities }: { initialFacilities: any[] }) {
  const [searchQuery, setSearchQuery] = useState("");
  const [userLocation, setUserLocation] = useState<{ lat: number, lng: number } | null>(null);
  const [sortMethod, setSortMethod] = useState<'dist' | 'alpha'>('alpha');

  useEffect(() => {
    if ("geolocation" in navigator) {
      navigator.geolocation.getCurrentPosition(p => {
        setUserLocation({ lat: p.coords.latitude, lng: p.coords.longitude });
        setSortMethod('dist');
      });
    }
  }, []);

  const processed = useMemo(() => {
    if (!Array.isArray(initialFacilities)) return [];

    // Fyllord som fjernes slik at "Åpne baner i Oslo" blir til søkeordene ["åpne", "oslo"]
    const stopWords = new Set(["i", "på", "for", "med", "av", "og"]);

    return initialFacilities.map(f => {
      // --- ROBUST DATA-PARSING ---
      const parseJson = (val: any, fallback: any) => {
        if (!val) return fallback;
        if (typeof val === 'object') return val;
        try { return JSON.parse(val); } catch (e) { return fallback; }
      };

      const rawStatuses = parseJson(f.course_statuses, []);
      const sArr = Array.isArray(rawStatuses) && rawStatuses.length > 0 
        ? rawStatuses 
        : [{ status: 'ukjent', name: 'Hovedbane' }];
        
      const amenities = parseJson(f.amenities, {});
      const nsgData = parseJson(f.nsg_data, {});

      const dist = userLocation && f.lat && f.lng ? getDistance(userLocation.lat, userLocation.lng, f.lat, f.lng) : Infinity;
      const hasNSG = nsgData && Object.keys(nsgData).length > 0;
      const hasGolfamore = f.golfamore === true;
      
      // --- THE SEARCH BLOB ---
      // Vi starter med å legge navn, by og fylke i en stor, usynlig tekststreng
      let searchableText = `${f.name} ${f.city} ${f.county}`.toLowerCase();
      
      // 1. Injiser statuser i tekststrengen
      const hasOpen = sArr.some((c: any) => (c.status || "") === 'aapen');
      const hasClosed = sArr.some((c: any) => (c.status || "") === 'stengt');
      const hasWinter = sArr.some((c: any) => (c.status || "") === 'aapen_med_vintergreener');
      const hasNedlagt = sArr.some((c: any) => (c.status || "") === 'nedlagt');
      
      if (hasOpen) searchableText += " åpen åpne aapen";
      if (hasClosed) searchableText += " stengt stengte";
      if (hasWinter) searchableText += " vinter vintergreener vinterbane";
      if (hasNedlagt) searchableText += " nedlagt nedlagte";
      
      // 2. Injiser spesial-tags
      if (hasNSG) searchableText += " nsg norsk seniorgolf";
      if (hasGolfamore) searchableText += " golfamore amore";
      
      // 3. Injiser landsdel (f.eks. hvis fylket er Akershus, legger vi til "østlandet")
      const fylke = (f.county || "").toLowerCase();
      Object.entries(REGIONS).forEach(([regionName, counties]) => {
          if (counties.includes(fylke)) {
              searchableText += ` ${regionName}`;
          }
      });

      // Splitter brukerens søk inn i enkeltord og fjerner stopWords + ordene "bane"/"baner"
      const words = searchQuery
        .toLowerCase()
        .trim()
        .split(/\s+/)
        .filter(w => w.length > 0 && !stopWords.has(w) && w !== "bane" && w !== "baner");
      
      // Sjekker at ALLE ordene brukeren har skrevet, finnes et sted i "Search Blob"-en
      const matches = words.every(w => searchableText.includes(w));

      return { ...f, statuses: sArr, amenities, dist, hasNSG, hasGolfamore, matches };
    })
    .filter(f => f.matches)
    .sort((a, b) => {
        if (sortMethod === 'dist' && a.dist !== b.dist) return a.dist - b.dist;
        return a.name.localeCompare(b.name, 'nb');
    });
  }, [searchQuery, initialFacilities, userLocation, sortMethod]);

  return (
    <div className="max-w-[1400px] mx-auto px-6 py-12 relative z-40">
      <div className="text-center mb-6">
        <button onClick={() => setSortMethod(sortMethod === 'dist' ? 'alpha' : 'dist')} className="bg-white px-6 py-3 rounded-full shadow-md text-[10px] font-black text-[#8bc34a] uppercase tracking-widest border border-gray-100 transition-colors">
          {sortMethod === 'dist' ? "📍 Nærmeste baner først" : "🔠 Alfabetisk visning"} • {processed.length} baner
        </button>
      </div>

      <input className="w-full p-8 rounded-[2.5rem] shadow-2xl mb-16 text-gray-900 border-none ring-1 ring-black/5 text-2xl outline-none focus:ring-4 focus:ring-[#8bc34a]/20 transition-all bg-white" placeholder='Søk baner, fylke, status eller spesial (f.eks "Åpne baner i Akershus" eller "NSG")...' value={searchQuery} onChange={e => setSearchQuery(e.target.value)} />

      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-10">
        {processed.map((f: any) => {
          const sArr = f.statuses; // Sikret via pre-prosesseringen over

          // Formater datoen pent: "05. mars 2026"
          const lastUpdated = f.status_updated_at 
            ? new Date(f.status_updated_at).toLocaleDateString('nb-NO', { day: '2-digit', month: 'long', year: 'numeric' })
            : 'Ukjent';

          return (
            <Link href={`/golfbaner/${f.slug}`} key={f.id} className="bg-white rounded-[2.5rem] overflow-hidden shadow-sm hover:shadow-2xl transition-all duration-500 border border-gray-100 flex flex-col group relative">
              <div className="h-64 relative overflow-hidden bg-gray-100">
                <img src={f.image_url || "/Toppbilde-standard.jpg"} className="w-full h-full object-cover transition duration-1000 group-hover:scale-105" alt={f.name} />
                
                {/* Status Badges for ALLE baner på anlegget */}
                <div className="absolute top-5 left-5 flex flex-col gap-2 z-20">
                  {sArr.map((course: any, idx: number) => {
                    const rawStatus = (course.status || "ukjent").toLowerCase();
                    
                    let statusColor = "bg-gray-400"; 
                    if (rawStatus === 'aapen') statusColor = "bg-[#8bc34a]";
                    else if (rawStatus.includes('vinter') || rawStatus === 'stenger_snart') statusColor = "bg-[#ff5722]";
                    else if (rawStatus === 'aapner_snart') statusColor = "bg-amber-500";
                    else if (rawStatus === 'stengt') statusColor = "bg-red-600";
                    else if (rawStatus === 'nedlagt') statusColor = "bg-black";
                    else if (rawStatus === 'under_utvikling') statusColor = "bg-blue-500";

                    return (
                      <div key={idx} className="flex items-center gap-3">
                        <div className={`${statusColor} text-white px-3 py-1.5 rounded-xl text-[9px] font-black uppercase shadow-lg backdrop-blur-sm bg-opacity-90 flex items-center gap-2 max-w-[200px]`}>
                          {sArr.length > 1 && (
                            <span className="opacity-80 border-r border-white/30 pr-2 truncate max-w-[90px]" title={course.name}>
                              {course.name}
                            </span>
                          )}
                          <span>{STATUS_MAP[rawStatus] || rawStatus}</span>
                        </div>
                        
                        {/* Dato-pille ved siden av den øverste status-pillen */}
                        {idx === 0 && (
                          <div className="bg-white/30 backdrop-blur-sm text-[#11280f]/90 px-3 py-1.5 rounded-xl text-[11px] font-bold shadow-lg">
                            {lastUpdated}
                          </div>
                        )}
                      </div>
                    );
                  })}
                </div>

                {/* Avstandspille */}
                {f.dist !== Infinity && (
                    <div className="absolute bottom-5 right-5 bg-[#2d3319] text-white px-4 py-2 rounded-2xl text-[10px] font-black shadow-lg z-20">
                        {Math.round(f.dist)} km unna
                    </div>
                )}
              </div>

              <div className="p-8 flex flex-col flex-grow">
                <h3 className="font-black text-3xl text-[#11280f] mb-1 group-hover:text-[#8bc34a] transition-colors leading-tight">{f.name}</h3>
                <p className="text-gray-400 text-[11px] font-bold uppercase tracking-widest mb-8">{f.city} • {f.county}</p>
                
                <div className="mt-auto flex items-center justify-between">
                    <div className="flex items-center gap-2">
                        {/* Hull-pille */}
                        <span className="bg-[#f1f7ed] text-[#8bc34a] px-4 py-2 rounded-xl text-[10px] font-black uppercase tracking-widest">
                            {f.amenities?.antall_hull || '--'} HULL
                        </span>
                        {/* Banetype-pille */}
                        <span className="bg-gray-50 text-gray-400 px-4 py-2 rounded-xl text-[10px] font-black uppercase tracking-widest border border-gray-100">
                            {f.banetype || 'SKOGSBANE'}
                        </span>
                    </div>

                    {/* Sirkel-ikoner (NSG / Golfamore) */}
                    <div className="flex gap-2">
                        {f.hasNSG && (
                            <div className="w-9 h-9 bg-blue-600 text-white rounded-full flex items-center justify-center font-black text-sm shadow-lg border-2 border-white translate-y-1">N</div>
                        )}
                        {f.hasGolfamore && (
                            <div className="w-9 h-9 bg-[#ff5722] text-white rounded-full flex items-center justify-center font-black text-sm shadow-lg border-2 border-white translate-y-1">G</div>
                        )}
                    </div>
                </div>
              </div>
            </Link>
          );
        })}
      </div>
    </div>
  );
}