"use client";

import { useMemo, useState, useRef, useEffect } from "react";
import BrandLoader from "./BrandLoader";
import type { Tender } from "../lib/types";
import { Language, translations } from "../lib/translations";
import AgentChat from "./AgentChat";
import type { CompanyProfile } from "../lib/types";

type Props = {
  tenders: Tender[];
  onSearch: (params: { keyword?: string; buyer?: string; provider_code?: string; org_code?: string; status?: string; code?: string; date?: string; type_code?: string; skip?: number; limit?: number; isAgile?: boolean }) => void;
  onAnalyze: (tender: Tender) => void;
  forceShowFollowed?: boolean;
  initialKeyword?: string;
  lang: Language;
  companyProfile: CompanyProfile;
};

export default function TenderSearch({ tenders, onSearch, onAnalyze, forceShowFollowed = false, initialKeyword = "", lang, companyProfile }: Props) {
  const t = translations[lang];
  const [keyword, setKeyword] = useState(initialKeyword);
  const [buyerCode, setBuyerCode] = useState("");
  const [providerCode, setProviderCode] = useState("");
  const [orgCode, setOrgCode] = useState("");
  const [status, setStatus] = useState("");
  const [date, setDate] = useState("");
  const [typeCode, setTypeCode] = useState("");
  const [showAdvanced, setShowAdvanced] = useState(false);
  const [selectedTenderForModal, setSelectedTenderForModal] = useState<Tender | null>(null);
  const [selectedCodes, setSelectedCodes] = useState<string[]>([]);
  const [isSyncingToAgents, setIsSyncingToAgents] = useState(false);
  const [activeDetailTab, setActiveDetailTab] = useState<"Overview" | "Agent Chat">("Overview");
  
  const [followedTenders, setFollowedTenders] = useState<Tender[]>(() => {
    if (typeof window !== 'undefined') {
      const saved = localStorage.getItem('andes_followed_tenders_full');
      return saved ? JSON.parse(saved) : [];
    }
    return [];
  });
  
  const followedCodes = useMemo(() => followedTenders.map(item => item.code), [followedTenders]);
  const [showOnlyFollowed, setShowOnlyFollowed] = useState(forceShowFollowed);
  const [isLoading, setIsLoading] = useState(false);
  const [isAgileMode, setIsAgileMode] = useState(false);
  const isSearchPending = useRef(false);

  const filteredTenders = useMemo(() => {
    if (showOnlyFollowed) return followedTenders;
    let list = tenders;
    if (isAgileMode) {
      list = list.filter(item => 
        item.code.includes('COT26') || 
        item.name.toLowerCase().includes('compra ágil') ||
        item.sector?.toLowerCase().includes('agil')
      );
    }
    return list;
  }, [tenders, showOnlyFollowed, followedTenders, isAgileMode]);

  useEffect(() => {
    if (forceShowFollowed) setShowOnlyFollowed(true);
  }, [forceShowFollowed]);

  useEffect(() => {
    localStorage.setItem('andes_followed_tenders_full', JSON.stringify(followedTenders));
  }, [followedTenders]);

  const toggleFollow = (tender: Tender) => {
    setFollowedTenders(prev => {
      const isFollowing = prev.some(item => item.code === tender.code);
      return isFollowing ? prev.filter(item => item.code !== tender.code) : [...prev, tender];
    });
  };

  const handleSearch = async (e?: React.FormEvent) => {
    if (e) e.preventDefault();
    if (isSearchPending.current) return;
    isSearchPending.current = true;
    setIsLoading(true);
    try {
      const isCode = /^[0-9]+-[0-9]+-[A-Z0-9]+$/i.test(keyword);
      const searchParams = { 
        keyword: isCode ? undefined : keyword,
        code: isCode ? keyword : undefined,
        org_code: orgCode || undefined,
        status: status || undefined,
        type_code: typeCode || undefined,
        date,
        skip: 0, 
        limit: 50,
        isAgile: isAgileMode
      };
      
      console.log("[TenderSearch] Searching with params:", searchParams);
      await onSearch(searchParams);
    } catch (error) {
      console.error("[TenderSearch] Search failed:", error);
      const errorMsg = error instanceof Error ? error.message : "Search failed. Check your backend connection.";
      alert(`Search Error: ${errorMsg}`);
    } finally {
      setIsLoading(false);
      isSearchPending.current = false;
    }
  };

  const isTenderCode = /^[0-9]+-[0-9]+-[A-Z0-9]+$/i.test(keyword);
  const isLiveSearch = Boolean(isTenderCode || orgCode || status || date || typeCode);
  const searchButtonLabel = isLoading ? "Searching..." : isLiveSearch ? "Live MP Search" : "Fetch Active Tenders";

  // VIEW: Search & List
  const renderListView = () => (
    <div className="space-y-8">
      <div className={`glass-card rounded-3xl p-8 mb-4 border transition-all duration-500 ${forceShowFollowed ? 'border-purple-500/30 bg-purple-500/5 shadow-[0_0_50px_rgba(168,85,247,0.1)]' : 'border-white/10'}`}>
        <div className="mb-6 flex justify-between items-start">
          <div>
            <div className="flex items-center gap-3 mb-2">
               <div className={`w-10 h-10 rounded-2xl flex items-center justify-center text-xl ${forceShowFollowed ? 'bg-purple-500 text-white' : 'bg-white/5 text-slate-400'}`}>
                  {forceShowFollowed ? "★" : "📡"}
               </div>
               <h2 className="text-3xl font-black text-white tracking-tight">{forceShowFollowed ? "My Portfolio" : "Tender Discovery"}</h2>
            </div>
            <p className="text-slate-400 text-sm">Real-time access to the Chilean public procurement market.</p>
          </div>
        </div>
        
        {!forceShowFollowed && (
        <form onSubmit={handleSearch} className="relative z-10 space-y-6">
            <div className="flex flex-col md:flex-row gap-4">
              <div className="relative flex-1">
                <input
                  type="text"
                  placeholder="Search by name, ID, or description..."
                  className="w-full bg-slate-900/60 border border-white/10 rounded-2xl pl-6 pr-4 py-4 text-white focus:outline-none focus:ring-2 focus:ring-purple-500/50 transition-all"
                  value={keyword}
                  onChange={(e) => setKeyword(e.target.value)}
                />
              </div>
              <div className="flex gap-2">
                <button type="button" onClick={() => setShowAdvanced(!showAdvanced)} className={`px-6 py-4 rounded-2xl border font-bold text-sm transition-all ${showAdvanced ? 'bg-purple-500/20 border-purple-500/50 text-purple-300' : 'bg-white/5 border-white/10 text-slate-400'}`}>Settings</button>
                <button type="submit" disabled={isLoading} className="px-8 py-4 bg-purple-600 hover:bg-purple-500 text-white rounded-2xl font-bold transition-all shadow-lg active:scale-95">{searchButtonLabel}</button>
              </div>
            </div>

            {showAdvanced && (
              <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-4 p-6 glass-card rounded-3xl bg-white/[0.02] border border-white/5">
                <div className="space-y-1"><label className="text-[10px] font-bold uppercase text-slate-500 ml-1">Date</label><input type="date" className="w-full bg-black/40 border border-white/10 rounded-xl px-4 py-2 text-white text-sm [color-scheme:dark]" value={date} onChange={(e) => setDate(e.target.value)} /></div>
                <div className="space-y-1"><label className="text-[10px] font-bold uppercase text-slate-500 ml-1">Org ID</label><input type="text" placeholder="e.g. 6945" className="w-full bg-black/40 border border-white/10 rounded-xl px-4 py-2 text-white text-sm" value={orgCode} onChange={(e) => setOrgCode(e.target.value)} /></div>
                <div className="space-y-1"><label className="text-[10px] font-bold uppercase text-slate-500 ml-1">Status</label><select className="w-full bg-black/40 border border-white/10 rounded-xl px-4 py-2 text-white text-sm" value={status} onChange={(e) => setStatus(e.target.value)}><option value="">All</option><option value="5">Publicada</option><option value="7">Desierta</option></select></div>
                <div className="space-y-1"><label className="text-[10px] font-bold uppercase text-slate-500 ml-1">Type</label><select className="w-full bg-black/40 border border-white/10 rounded-xl px-4 py-2 text-white text-sm" value={typeCode} onChange={(e) => setTypeCode(e.target.value)}><option value="">All</option><option value="LE">LE</option><option value="LP">LP</option></select></div>
              </div>
            )}
          </form>
        )}
      </div>

      <div className="glass-card rounded-3xl overflow-hidden border border-white/5">
        <table className="w-full text-left text-sm table-fixed">
          <thead className="bg-white/5 text-slate-500 uppercase text-[10px] font-bold border-b border-white/5">
            <tr>
              <th className="px-4 py-5 w-[50px] text-center"></th>
              <th className="px-6 py-5 w-[110px] hidden sm:table-cell">ID</th>
              <th className="px-6 py-5 min-w-[200px]">Opportunity</th>
              <th className="px-6 py-5 w-[150px] hidden md:table-cell">Buyer</th>
              <th className="px-6 py-5 text-center w-[100px] hidden sm:table-cell">Status</th>
              <th className="px-6 py-5 w-[80px] text-center">Action</th>
            </tr>
          </thead>
          <tbody className="divide-y divide-white/5">
            {filteredTenders.map((item) => (
              <tr key={item.code} className="hover:bg-white/[0.04] transition-colors group">
                <td className="px-2 py-5 text-center">
                  <button 
                    onPointerDown={(e) => {
                      e.stopPropagation();
                      toggleFollow(item);
                    }}
                    className={`text-lg transition-all hover:scale-125 active:scale-90 p-2 cursor-pointer relative z-50 ${followedCodes.includes(item.code) ? 'text-amber-400 drop-shadow-[0_0_10px_rgba(251,191,36,0.6)]' : 'text-white/30 hover:text-white/60'}`}
                  >
                    {followedCodes.includes(item.code) ? "★" : "☆"}
                  </button>
                </td>
                <td className="px-6 py-5 font-mono text-purple-400 text-[9px] hidden sm:table-cell">{item.code}</td>
                <td className="px-6 py-5">
                   <div className="font-bold text-white text-xs sm:text-sm line-clamp-2" title={item.name}>{item.name}</div>
                   <div className="text-[10px] text-slate-500 mt-1 md:hidden truncate max-w-[150px]">{item.buyer}</div>
                </td>
                <td className="px-6 py-5 text-slate-400 text-[10px] truncate hidden md:table-cell">{item.buyer}</td>
                <td className="px-6 py-5 text-center hidden sm:table-cell">
                  <span className={`inline-block rounded-full px-2 py-1 text-[8px] font-black uppercase ${item.status.toLowerCase().includes('publicada') ? 'bg-green-500/10 text-green-400' : 'bg-slate-800 text-slate-500'}`}>{item.status}</span>
                </td>
                <td className="px-4 py-5 text-center">
                   <button 
                     onClick={() => setSelectedTenderForModal(item)}
                     className="p-2 sm:px-4 sm:py-2 rounded-xl bg-purple-500/10 border border-purple-500/20 text-[9px] font-black text-purple-400 hover:bg-purple-500 hover:text-white transition-all uppercase tracking-widest"
                   >
                     <span className="hidden sm:inline">View</span>
                     <span className="sm:hidden">→</span>
                   </button>
                </td>
              </tr>
            ))}
          </tbody>
        </table>
      </div>
    </div>
  );

  // VIEW: Detail Modal
  const renderDetailView = (tender: Tender) => (
    <div className="animate-in slide-in-from-right-8 fade-in duration-700 w-full max-w-[1600px] mx-auto pt-4 pb-20">
      <div className="flex flex-col md:flex-row md:justify-between md:items-end gap-6 mb-8 relative z-20">
        <button 
          onClick={() => {
            console.log("[TenderSearch] Returning to list...");
            setSelectedTenderForModal(null);
          }} 
          className="flex items-center gap-4 px-6 py-3 rounded-2xl bg-white/5 border border-white/10 text-slate-400 hover:text-white hover:bg-white/10 transition-all group active:scale-95 cursor-pointer relative z-30 w-fit"
        >
          <span className="text-2xl group-hover:-translate-x-1 transition-transform">←</span>
          <span className="text-xs font-black uppercase tracking-widest">Back to search</span>
        </button>
        <div className="flex flex-col sm:flex-row items-stretch sm:items-center gap-3 bg-white/5 p-1 rounded-2xl border border-white/10 w-full md:w-auto">
          <button 
            onClick={() => toggleFollow(tender)}
            className={`px-4 py-2.5 rounded-xl text-[10px] font-black uppercase transition-all flex items-center justify-center gap-2 ${followedCodes.includes(tender.code) ? "bg-amber-500/20 text-amber-400 border border-amber-500/30" : "bg-white/5 text-slate-400 hover:bg-white/10"}`}
          >
            <span>{followedCodes.includes(tender.code) ? "★" : "☆"}</span>
            <span>{followedCodes.includes(tender.code) ? "In Portfolio" : "Add to Portfolio"}</span>
          </button>
          <div className="hidden sm:block w-px h-6 bg-white/10 mx-1" />
          <div className="flex gap-2">
            <button onClick={() => setActiveDetailTab("Overview")} className={`flex-1 md:flex-none px-6 py-2.5 rounded-xl text-xs font-black uppercase transition-all ${activeDetailTab === "Overview" ? "bg-purple-600 text-white shadow-lg" : "text-slate-500 bg-white/5"}`}>Overview</button>
            <button onClick={() => setActiveDetailTab("Agent Chat")} className={`flex-1 md:flex-none px-6 py-2.5 rounded-xl text-xs font-black uppercase transition-all ${activeDetailTab === "Agent Chat" ? "bg-purple-600 text-white shadow-lg" : "text-slate-500 bg-white/5"}`}>Agent Chat</button>
          </div>
        </div>
      </div>

      {activeDetailTab === "Overview" ? (
        <div className="space-y-8">
          <div className="glass-card rounded-[2.5rem] overflow-hidden border border-white/5 bg-slate-900/40 backdrop-blur-xl p-10 md:p-14 relative">
            <div className="absolute top-0 right-0 p-8">
              <a 
                href={`https://www.mercadopublico.cl/Portal/BuscarLicitacion?texto=${tender.code}`} 
                target="_blank" 
                rel="noopener noreferrer"
                className="px-4 py-2 rounded-xl bg-purple-500/10 border border-purple-500/20 text-[10px] font-bold text-purple-400 hover:bg-purple-500/20 transition-all uppercase tracking-widest whitespace-nowrap"
              >
                Visit Official Site 🔗
              </a>
            </div>

            <div className="flex items-center gap-3 mb-6">
              <span className="text-sm font-mono text-purple-400 bg-purple-400/10 px-3 py-1 rounded-lg border border-purple-400/20">{tender.code}</span>
              <span className="px-3 py-1 rounded-lg text-xs font-black uppercase bg-green-500/10 text-green-400 border border-green-500/20">{tender.status}</span>
              <span className="px-3 py-1 rounded-lg text-[10px] font-bold uppercase bg-white/5 text-slate-500 border border-white/10">{tender.type || "N/A"}</span>
            </div>
            
            <h3 className="text-3xl md:text-5xl font-black text-white leading-tight mb-4 max-w-4xl">{tender.name}</h3>
            <p className="text-slate-400 text-xl font-medium mb-12">{tender.buyer}</p>

            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6 mb-12">
               <div className="bg-white/5 p-6 rounded-3xl border border-white/5">
                  <p className="text-[10px] uppercase font-bold text-slate-500 tracking-[0.2em] mb-2">Estimated Investment</p>
                  <p className="text-2xl font-black text-white">
                    {tender.estimated_amount ? new Intl.NumberFormat("es-CL", { style: "currency", currency: tender.currency || "CLP", maximumFractionDigits: 0 }).format(tender.estimated_amount) : "N/A"}
                  </p>
               </div>
               <div className="bg-white/5 p-6 rounded-3xl border border-white/5">
                  <p className="text-[10px] uppercase font-bold text-slate-500 tracking-[0.2em] mb-2">Closing Deadline</p>
                  <p className="text-2xl font-black text-white font-mono">{tender.closing_date ? new Date(tender.closing_date).toLocaleDateString() : "---"}</p>
               </div>
               <div className="bg-white/5 p-6 rounded-3xl border border-white/5">
                  <p className="text-[10px] uppercase font-bold text-slate-500 tracking-[0.2em] mb-2">Region</p>
                  <p className="text-2xl font-black text-white truncate" title={tender.region}>{tender.region || "Nacional"}</p>
               </div>
               <div className="bg-white/5 p-6 rounded-3xl border border-white/5">
                  <p className="text-[10px] uppercase font-bold text-slate-500 tracking-[0.2em] mb-2">Sector</p>
                  <p className="text-2xl font-black text-white truncate">{tender.sector || "General"}</p>
               </div>
            </div>

            <div className="grid lg:grid-cols-3 gap-12">
              <div className="lg:col-span-2 space-y-8">
                <div>
                  <h4 className="text-[10px] font-black uppercase tracking-[0.3em] text-slate-500 mb-4">Detailed Description</h4>
                  <div className="text-slate-300 leading-relaxed text-lg bg-white/[0.02] p-10 rounded-[2.5rem] border border-white/5 whitespace-pre-wrap">{tender.description || "No description provided."}</div>
                </div>

                {tender.evaluation_criteria && tender.evaluation_criteria.length > 0 && (
                  <div>
                    <h4 className="text-[10px] font-black uppercase tracking-[0.3em] text-slate-500 mb-6 flex items-center gap-2">
                       <span className="text-purple-500">⚖️</span> Evaluation Criteria
                    </h4>
                    <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                      {tender.evaluation_criteria.map((crit, idx) => (
                        <div key={idx} className="p-6 rounded-3xl bg-slate-900/60 border border-white/5 hover:border-purple-500/30 transition-all group relative overflow-hidden">
                          <div className="absolute top-0 right-0 p-4 opacity-10 group-hover:opacity-20 transition-opacity">
                            <span className="text-4xl font-black">{crit.weight}%</span>
                          </div>
                          <div className="flex justify-between items-start mb-2">
                            <span className="text-sm font-bold text-slate-200 group-hover:text-purple-400 transition-colors pr-12">{crit.name}</span>
                            <span className="text-[10px] font-black text-purple-400 bg-purple-400/10 px-2 py-1 rounded-lg border border-purple-400/20">{crit.weight}%</span>
                          </div>
                          {crit.description && <p className="text-[11px] text-slate-500 line-clamp-3 italic leading-relaxed">{crit.description}</p>}
                        </div>
                      ))}
                    </div>
                  </div>
                )}

                {/* Lifecycle Section */}
                <div>
                  <h4 className="text-[10px] font-black uppercase tracking-[0.3em] text-slate-500 mb-6 flex items-center gap-2">
                     <span className="text-cyan">🔄</span> Procurement Lifecycle
                  </h4>
                  <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
                    {[
                      { label: "Preguntas", icon: "❓", status: "Active" },
                      { label: "Historial", icon: "📜", status: "Available" },
                      { label: "Apertura", icon: "🔓", status: "Pending" },
                      { label: "Adjudicación", icon: "🏆", status: "Future" }
                    ].map((step, i) => (
                      <div key={i} className="p-4 rounded-2xl bg-white/[0.03] border border-white/5 text-center group hover:bg-white/5 transition-all">
                        <div className="text-2xl mb-2 group-hover:scale-110 transition">{step.icon}</div>
                        <div className="text-[10px] font-black uppercase tracking-widest text-slate-300 mb-1">{step.label}</div>
                        <div className="text-[8px] font-bold text-slate-600 uppercase">{step.status}</div>
                      </div>
                    ))}
                  </div>
                </div>
                
                {tender.items && tender.items.length > 0 && (
                  <div>
                    <h4 className="text-[10px] font-black uppercase tracking-[0.3em] text-slate-500 mb-4">Products / Services Required</h4>
                    <div className="overflow-hidden rounded-3xl border border-white/5 bg-black/20">
                      <table className="w-full text-left text-xs">
                        <thead className="bg-white/5 text-slate-500 font-bold uppercase text-[9px]">
                          <tr>
                            <th className="px-6 py-4">Item Name</th>
                            <th className="px-6 py-4 text-right">Quantity</th>
                          </tr>
                        </thead>
                        <tbody className="divide-y divide-white/5">
                          {tender.items.map((item, idx) => (
                            <tr key={idx} className="hover:bg-white/5 transition-colors">
                              <td className="px-6 py-4 text-slate-300 font-medium">{item.name}</td>
                              <td className="px-6 py-4 text-right font-mono text-cyan">{item.quantity} {item.unit}</td>
                            </tr>
                          ))}
                        </tbody>
                      </table>
                    </div>
                  </div>
                )}
              </div>

              <div className="space-y-8">
                <div className="p-8 rounded-[2.5rem] bg-purple-600/10 border border-purple-500/20 relative overflow-hidden group">
                  <div className="absolute -right-10 -bottom-10 h-32 w-32 bg-purple-500/10 rounded-full blur-3xl group-hover:bg-purple-500/20 transition-all" />
                  <h4 className="text-[10px] font-black uppercase tracking-[0.3em] text-purple-400 mb-6">Decision Intelligence</h4>
                  <p className="text-xs text-slate-400 leading-relaxed mb-8">Launch our multi-agent AI pipeline to analyze compliance, risks, and win-probability for this opportunity.</p>
                  <button onClick={() => { onAnalyze(tender); setSelectedTenderForModal(null); }} className="w-full premium-gradient text-white px-8 py-5 rounded-2xl font-black uppercase shadow-xl shadow-purple-500/20 hover:scale-[1.02] active:scale-[0.98] transition-all">Analyze with AI</button>
                </div>

                <div className="p-8 rounded-[2.5rem] bg-white/5 border border-white/10">
                  <h4 className="text-[10px] font-black uppercase tracking-[0.3em] text-slate-500 mb-6">Documents & Attachments</h4>
                  {tender.attachments && tender.attachments.length > 0 ? (
                    <div className="space-y-3">
                      {tender.attachments.map((att, idx) => (
                        <a key={idx} href={att.url} target="_blank" rel="noopener noreferrer" className="flex items-center justify-between p-5 rounded-3xl bg-black/40 border border-white/5 hover:bg-white/5 hover:border-purple-500/40 transition-all group">
                           <div className="flex items-center gap-3 overflow-hidden">
                             <span className="text-xl group-hover:scale-110 transition">📄</span>
                             <span className="text-[11px] text-slate-400 group-hover:text-white truncate max-w-[160px]">{att.name}</span>
                           </div>
                           <span className="text-xs opacity-40 group-hover:opacity-100">📥</span>
                        </a>
                      ))}
                    </div>
                  ) : (
                    <div className="text-center py-10 px-4 rounded-2xl bg-black/20 border border-dashed border-white/10">
                      <span className="text-2xl mb-2 block">📄</span>
                      <p className="text-[10px] text-slate-600 font-bold uppercase leading-relaxed">No direct attachments found. Check the official site for the full bidding package.</p>
                    </div>
                  )}
                </div>
              </div>
            </div>
          </div>
        </div>
      ) : (
        <AgentChat tender={tender} companyProfile={companyProfile} />
      )}
    </div>
  );

  return (
    <div className="space-y-8 animate-in fade-in slide-in-from-bottom-4 duration-700">
      {selectedTenderForModal ? renderDetailView(selectedTenderForModal) : renderListView()}
      {isLoading && <BrandLoader />}
    </div>
  );
}