import React, { useEffect, useState } from 'react';
import { Link } from 'react-router-dom';
import { CondoService } from '../services/mockDb';
import { Family, Condo, Notice, AppSettings } from '../types';
import { Search, ChevronRight, UserCircle, Building, Bell, AlertTriangle, Hammer, Calendar, Info, Link as LinkIcon, Check } from 'lucide-react';

export const FamilyList: React.FC = () => {
  const [families, setFamilies] = useState<Family[]>([]);
  const [loading, setLoading] = useState(true);
  const [searchTerm, setSearchTerm] = useState('');
  const [activeCondo, setActiveCondo] = useState<Condo | undefined>(undefined);
  const [notices, setNotices] = useState<Notice[]>([]);
  const [userReadIds, setUserReadIds] = useState<string[]>([]);
  const [settings, setSettings] = useState<AppSettings | null>(null);
  const currentUser = CondoService.getCurrentUser();

  useEffect(() => {
    const fetchData = async () => {
      try {
        CondoService.seedPayments();
        const [fams, condo, allNotices, appSettings] = await Promise.all([
            CondoService.getFamilies(),
            CondoService.getActiveCondo(),
            CondoService.getNotices(),
            CondoService.getSettings()
        ]);
        setFamilies(fams);
        setActiveCondo(condo);
        setSettings(appSettings);

        if (condo && currentUser && appSettings.features.notices) {
            // Filter notices logic:
            // 1. Must belong to current condo and be active
            // 2. If Admin/PowerUser -> See everything
            // 3. If standard User -> See Public notices (no target) OR Targeted notices containing their familyId
            const isPrivileged = currentUser.role === 'admin' || currentUser.role === 'poweruser';

            const condoNotices = allNotices.filter(n => {
                if (n.condoId !== condo.id || !n.active) return false;
                
                if (isPrivileged) return true;

                // Check targeting
                const hasTargets = n.targetFamilyIds && n.targetFamilyIds.length > 0;
                if (!hasTargets) return true; // Public to all

                return currentUser.familyId && n.targetFamilyIds?.includes(currentUser.familyId);
            });

            setNotices(condoNotices);
            
            // Check which ones are read
            const readStatuses = await Promise.all(condoNotices.map(n => CondoService.getNoticeReadStatus(n.id)));
            const readIds: string[] = [];
            readStatuses.forEach((reads, idx) => {
                if (reads.find(r => r.userId === currentUser.id)) {
                    readIds.push(condoNotices[idx].id);
                }
            });
            setUserReadIds(readIds);
        }

      } catch (e) {
        console.error("Error fetching data", e);
      } finally {
        setLoading(false);
      }
    };
    fetchData();
  }, []);

  const filteredFamilies = families.filter(f => 
    f.name.toLowerCase().includes(searchTerm.toLowerCase()) || 
    f.unitNumber.toLowerCase().includes(searchTerm.toLowerCase())
  );

  const NoticeIcon = ({type}: {type: string}) => {
      switch(type) {
          case 'warning': return <AlertTriangle className="w-5 h-5 text-amber-500" />;
          case 'maintenance': return <Hammer className="w-5 h-5 text-orange-500" />;
          case 'event': return <Calendar className="w-5 h-5 text-purple-500" />;
          default: return <Info className="w-5 h-5 text-blue-500" />;
      }
  };

  if (loading) {
    return <div className="flex justify-center items-center h-64 text-slate-400">Caricamento in corso...</div>;
  }

  if (!activeCondo) {
      return (
          <div className="text-center p-12 text-slate-500">
             <Building className="w-12 h-12 mx-auto mb-4 text-slate-300" />
             <h2 className="text-xl font-bold text-slate-700">Nessun Condominio Selezionato</h2>
             <p>Seleziona o crea un condominio dalle impostazioni.</p>
          </div>
      );
  }

  return (
    <div className="space-y-8 pb-12">
      {/* Responsive Header */}
      <div className="flex flex-col md:flex-row md:items-end justify-between gap-4">
        <div>
          <h2 className="text-2xl font-bold text-slate-800">Elenco Condomini</h2>
          <p className="text-slate-500 text-sm md:text-base flex items-center gap-1.5">
             <Building className="w-4 h-4" />
             {activeCondo.name}
          </p>
        </div>
        
        <div className="relative w-full md:w-80 lg:w-96">
          <div className="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
            <Search className="h-5 w-5 text-slate-400" />
          </div>
          <input
            type="text"
            className="block w-full pl-10 pr-3 py-2.5 border border-slate-300 rounded-xl leading-5 bg-white placeholder-slate-400 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition duration-150 ease-in-out sm:text-sm shadow-sm text-slate-700"
            placeholder="Cerca nome o interno..."
            value={searchTerm}
            onChange={(e) => setSearchTerm(e.target.value)}
          />
        </div>
      </div>

      {/* Notices Section (Visible to Users only if feature enabled) */}
      {settings?.features.notices && notices.length > 0 && (
          <div className="space-y-3">
              <h3 className="font-bold text-slate-700 flex items-center gap-2">
                  <Bell className="w-5 h-5" /> Bacheca Avvisi
              </h3>
              <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
                  {notices.map(notice => {
                      const isRead = userReadIds.includes(notice.id);
                      return (
                        <div key={notice.id} className={`bg-white p-4 rounded-xl border relative transition-all ${isRead ? 'border-slate-100 opacity-80' : 'border-blue-200 shadow-sm ring-1 ring-blue-100'}`}>
                            <div className="flex items-start gap-3">
                                <div className={`p-2 rounded-lg flex-shrink-0 ${notice.type === 'warning' ? 'bg-amber-50' : 'bg-slate-50'}`}>
                                    <NoticeIcon type={notice.type} />
                                </div>
                                <div className="min-w-0">
                                    <div className="flex items-center gap-2 mb-1">
                                        <h4 className={`font-bold text-sm truncate ${isRead ? 'text-slate-600' : 'text-slate-800'}`}>{notice.title}</h4>
                                        {isRead && <span className="text-[10px] bg-slate-100 text-slate-400 px-1.5 py-0.5 rounded font-bold uppercase">Letto</span>}
                                        {!isRead && <span className="text-[10px] bg-blue-100 text-blue-600 px-1.5 py-0.5 rounded font-bold uppercase">Nuovo</span>}
                                    </div>
                                    <p className="text-xs text-slate-400 mb-2">{new Date(notice.date).toLocaleDateString()}</p>
                                    <p className="text-sm text-slate-600 line-clamp-3 mb-2">{notice.content}</p>
                                    {notice.link && (
                                        <a href={notice.link} target="_blank" rel="noopener noreferrer" className="text-xs text-blue-600 font-medium hover:underline flex items-center gap-1">
                                            <LinkIcon className="w-3 h-3"/> Apri Link
                                        </a>
                                    )}
                                </div>
                            </div>
                        </div>
                      );
                  })}
              </div>
          </div>
      )}

      {/* List */}
      <div className="bg-white shadow-sm rounded-xl overflow-hidden border border-slate-200">
        <ul className="divide-y divide-slate-100">
          {filteredFamilies.length === 0 ? (
            <li className="p-12 text-center text-slate-500 flex flex-col items-center gap-2">
              <Search className="w-8 h-8 text-slate-300" />
              <span>Nessuna famiglia trovata in questo condominio.</span>
            </li>
          ) : (
            filteredFamilies.map((family) => (
              <li key={family.id} className="hover:bg-slate-50 transition-colors active:bg-slate-100">
                <Link to={`/family/${family.id}`} className="block p-4 sm:p-5">
                  <div className="flex items-center justify-between gap-3">
                    <div className="flex items-center gap-3 sm:gap-4 overflow-hidden">
                      <div className="bg-blue-100 p-2 sm:p-2.5 rounded-full flex-shrink-0">
                        <UserCircle className="w-6 h-6 sm:w-8 sm:h-8 text-blue-600" />
                      </div>
                      <div className="min-w-0">
                        <p className="text-base sm:text-lg font-semibold text-blue-600 truncate">
                          {family.name}
                        </p>
                        <p className="flex items-center text-sm text-slate-500 truncate">
                          Interno: <span className="font-medium text-slate-700 ml-1">{family.unitNumber}</span>
                        </p>
                      </div>
                    </div>
                    <div className="flex-shrink-0">
                      <ChevronRight className="h-5 w-5 text-slate-400" />
                    </div>
                  </div>
                </Link>
              </li>
            ))
          )}
        </ul>
      </div>
    </div>
  );
};