"use client";

import { useState, useEffect, useCallback, useRef } from "react";
import { Card } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { toast } from "sonner";
import {
  Database, Search, X, ChevronDown, ChevronUp, Trash2, ExternalLink,
  Mail, Star, Tag, FileText, ArrowUpDown, ArrowUp, ArrowDown,
  CheckSquare, Square, Download, Plus, RefreshCw, Phone
} from "lucide-react";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";

// ─── Types ────────────────────────────────────────────────────────────────────

interface Lead {
  id: string;
  domain: string | null;
  companyName: string | null;
  contactName: string | null;
  contactTitle: string | null;
  email: string | null;
  linkedinUrl: string | null;
  phone: string | null;
  sourceTab: string;
  sourceTerm: string | null;
  sourceJobId: string | null;
  serpTitle: string | null;
  serpSnippet: string | null;
  serpRank: number | null;
  serpUrl: string | null;
  emailConfidence: number | null;
  status: string;
  priority: string;
  notes: string | null;
  tags: string | null;
  country: string | null;
  headcount: string | null;
  industry: string | null;
  capturedAt: string;
  contactedAt: string | null;
  events?: Array<{ id: string; event: string; at: string }>;
}

interface Stats {
  total: number;
  new: number;
  contacted: number;
  withEmail: number;
  dailyCounts: Array<{ date: string; count: number }>;
}

// ─── Constants ─────────────────────────────────────────────────────────────────

const STATUS_CONFIG: Record<string, { label: string; color: string; bg: string }> = {
  new:          { label: "Neu",           color: "text-blue-300",   bg: "bg-blue-500/20 border-blue-500/30" },
  in_progress:  { label: "In Bearbeitung",color: "text-purple-300", bg: "bg-purple-500/20 border-purple-500/30" },
  contacted:    { label: "Kontaktiert",   color: "text-teal-300",   bg: "bg-teal-500/20 border-teal-500/30" },
  qualified:    { label: "Qualifiziert",  color: "text-green-300",  bg: "bg-green-500/20 border-green-500/30" },
  not_relevant: { label: "Nicht relevant",color: "text-gray-400",   bg: "bg-gray-500/20 border-gray-500/30" },
  converted:    { label: "Konvertiert",   color: "text-amber-300",  bg: "bg-amber-500/20 border-amber-500/30" },
};

const SOURCE_CONFIG: Record<string, { label: string; icon: string }> = {
  airscale:   { label: "AirScale",   icon: "🏢" },
  linkedin:   { label: "LinkedIn",   icon: "💼" },
  serp:       { label: "SERP",       icon: "🔍" },
  "quick-serp": { label: "Quick SERP", icon: "⚡" },
  maps:       { label: "Maps",       icon: "📍" },
};

const PRIORITY_CONFIG: Record<string, { label: string; icon: string; color: string }> = {
  high:   { label: "Hoch",   icon: "↑", color: "text-red-400" },
  normal: { label: "Normal", icon: "→", color: "text-gray-400" },
  low:    { label: "Niedrig",icon: "↓", color: "text-blue-400" },
};

const TAG_PRESETS = [
  "solar", "b2b", "deutschland", "founder", "kmu", "warmkontakt",
  "kaltakquise", "follow-up", "interessiert", "angebot-gesendet",
];

function tagColor(tag: string): string {
  let hash = 0;
  for (let i = 0; i < tag.length; i++) hash = tag.charCodeAt(i) + ((hash << 5) - hash);
  const colors = [
    "bg-blue-500/20 text-blue-300 border-blue-500/30",
    "bg-purple-500/20 text-purple-300 border-purple-500/30",
    "bg-green-500/20 text-green-300 border-green-500/30",
    "bg-amber-500/20 text-amber-300 border-amber-500/30",
    "bg-pink-500/20 text-pink-300 border-pink-500/30",
    "bg-teal-500/20 text-teal-300 border-teal-500/30",
    "bg-orange-500/20 text-orange-300 border-orange-500/30",
  ];
  return colors[Math.abs(hash) % colors.length];
}

function relativeTime(dateStr: string): string {
  const diff = Date.now() - new Date(dateStr).getTime();
  const mins = Math.floor(diff / 60000);
  if (mins < 1) return "gerade eben";
  if (mins < 60) return `vor ${mins} Min.`;
  const hrs = Math.floor(mins / 60);
  if (hrs < 24) return `vor ${hrs} Std.`;
  const days = Math.floor(hrs / 24);
  if (days < 30) return `vor ${days} Tagen`;
  return new Date(dateStr).toLocaleDateString("de-DE");
}

// ─── Sparkline ────────────────────────────────────────────────────────────────

function Sparkline({ data, color }: { data: number[]; color: string }) {
  if (!data.length) return null;
  const max = Math.max(...data, 1);
  const w = 60, h = 24;
  const points = data.map((v, i) => `${(i / (data.length - 1)) * w},${h - (v / max) * h}`).join(" ");
  return (
    <svg width={w} height={h} className="opacity-70">
      <polyline points={points} fill="none" stroke={color} strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" />
    </svg>
  );
}

// ─── Status Badge ─────────────────────────────────────────────────────────────

function StatusBadge({ status, onChange }: { status: string; onChange: (s: string) => void }) {
  const [open, setOpen] = useState(false);
  const cfg = STATUS_CONFIG[status] || STATUS_CONFIG.new;
  return (
    <div className="relative">
      <button
        onClick={() => setOpen(!open)}
        className={`px-2 py-0.5 rounded-full text-xs font-medium border ${cfg.bg} ${cfg.color} whitespace-nowrap`}
      >
        {cfg.label}
      </button>
      {open && (
        <div className="absolute z-50 top-7 left-0 bg-[#1a1a28] border border-[#2e2e3e] rounded-lg shadow-xl p-1 min-w-[160px]">
          {Object.entries(STATUS_CONFIG).map(([key, c]) => (
            <button
              key={key}
              onClick={() => { onChange(key); setOpen(false); }}
              className={`w-full text-left px-3 py-1.5 rounded text-xs hover:bg-[#2e2e3e] ${c.color} ${status === key ? "font-bold" : ""}`}
            >
              {c.label}
            </button>
          ))}
        </div>
      )}
    </div>
  );
}

// ─── Side Panel ───────────────────────────────────────────────────────────────

function SidePanel({ lead, onClose, onUpdate }: {
  lead: Lead;
  onClose: () => void;
  onUpdate: (updated: Partial<Lead>) => void;
}) {
  const [notes, setNotes] = useState(lead.notes || "");
  const [tagInput, setTagInput] = useState("");
  const [fullLead, setFullLead] = useState<Lead>(lead);
  const notesTimer = useRef<ReturnType<typeof setTimeout> | null>(null);

  useEffect(() => {
    // Load full lead with events
    fetch(`/api/leads/${lead.id}`).then(r => r.json()).then(setFullLead).catch(() => {});
  }, [lead.id]);

  const tags: string[] = JSON.parse(fullLead.tags || "[]");

  async function patch(data: Partial<Lead>) {
    const res = await fetch(`/api/leads/${lead.id}`, {
      method: "PATCH",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(data),
    });
    if (res.ok) {
      const updated = await res.json() as Lead;
      setFullLead(prev => ({ ...prev, ...updated }));
      onUpdate(updated);
    }
  }

  function handleNotesChange(v: string) {
    setNotes(v);
    if (notesTimer.current) clearTimeout(notesTimer.current);
    notesTimer.current = setTimeout(() => patch({ notes: v }), 500);
  }

  function addTag(tag: string) {
    const trimmed = tag.trim().toLowerCase();
    if (!trimmed || tags.includes(trimmed)) return;
    const newTags = [...tags, trimmed];
    patch({ tags: JSON.stringify(newTags) });
    setTagInput("");
  }

  function removeTag(tag: string) {
    patch({ tags: JSON.stringify(tags.filter(t => t !== tag)) });
  }

  const conf = fullLead.emailConfidence;
  const confColor = conf == null ? "text-gray-500" : conf >= 0.8 ? "text-green-400" : conf >= 0.5 ? "text-yellow-400" : "text-red-400";

  return (
    <div className="fixed inset-0 z-40 flex justify-end" onClick={onClose}>
      <div className="absolute inset-0 bg-black/40 backdrop-blur-sm" />
      <div
        className="relative z-50 w-full max-w-md h-full bg-[#0e0e1a] border-l border-[#1e1e2e] overflow-y-auto flex flex-col"
        style={{ animation: "slideIn 200ms ease-out" }}
        onClick={e => e.stopPropagation()}
      >
        <style>{`@keyframes slideIn { from { transform: translateX(100%) } to { transform: translateX(0) } }`}</style>

        {/* Header */}
        <div className="sticky top-0 bg-[#0e0e1a] border-b border-[#1e1e2e] p-4 flex items-start gap-3">
          <div className="flex-1 min-w-0">
            <h2 className="text-base font-bold text-white truncate">{fullLead.companyName || fullLead.domain || "Unbekannt"}</h2>
            <p className="text-xs text-gray-400">{fullLead.domain}</p>
          </div>
          <button onClick={onClose} className="text-gray-500 hover:text-white p-1 rounded">
            <X className="w-4 h-4" />
          </button>
        </div>

        <div className="p-4 space-y-4 flex-1">
          {/* Status + Priority */}
          <div className="flex items-center gap-3">
            <StatusBadge status={fullLead.status} onChange={s => patch({ status: s })} />
            <div className="flex gap-1">
              {Object.entries(PRIORITY_CONFIG).map(([key, p]) => (
                <button
                  key={key}
                  onClick={() => patch({ priority: key })}
                  className={`px-2 py-0.5 rounded text-xs border transition-all ${
                    fullLead.priority === key
                      ? "bg-[#2e2e3e] border-[#4e4e6e] " + p.color
                      : "border-[#1e1e2e] text-gray-600 hover:border-[#2e2e3e]"
                  }`}
                >
                  {p.icon} {p.label}
                </button>
              ))}
            </div>
          </div>

          {/* Contact Info */}
          <div className="bg-[#111118] rounded-lg border border-[#1e1e2e] p-3 space-y-2">
            <h3 className="text-xs font-semibold text-gray-400 uppercase tracking-wider">Kontakt</h3>
            {fullLead.contactName && <p className="text-sm text-white">{fullLead.contactName}{fullLead.contactTitle && <span className="text-gray-400 ml-1">· {fullLead.contactTitle}</span>}</p>}
            {fullLead.email && (
              <div className="flex items-center gap-2">
                <Mail className="w-3.5 h-3.5 text-gray-500" />
                <span className={`text-sm font-mono ${confColor}`}>{fullLead.email}</span>
                <button onClick={() => { navigator.clipboard.writeText(fullLead.email!); toast.success("Kopiert"); }} className="text-gray-600 hover:text-white">
                  <FileText className="w-3 h-3" />
                </button>
                {conf != null && <span className={`text-xs ${confColor}`}>{Math.round(conf * 100)}%</span>}
              </div>
            )}
            {fullLead.phone && (
              <div className="flex items-center gap-2">
                <Phone className="w-3.5 h-3.5 text-gray-500" />
                <span className="text-sm text-gray-300">{fullLead.phone}</span>
              </div>
            )}
            {fullLead.linkedinUrl && (
              <a href={fullLead.linkedinUrl} target="_blank" rel="noreferrer" className="flex items-center gap-1 text-xs text-blue-400 hover:underline">
                <ExternalLink className="w-3 h-3" /> LinkedIn
              </a>
            )}
          </div>

          {/* Source Info */}
          <div className="bg-[#111118] rounded-lg border border-[#1e1e2e] p-3 space-y-1.5">
            <h3 className="text-xs font-semibold text-gray-400 uppercase tracking-wider">Quelle</h3>
            <p className="text-sm text-gray-300">
              {SOURCE_CONFIG[fullLead.sourceTab]?.icon} {SOURCE_CONFIG[fullLead.sourceTab]?.label || fullLead.sourceTab}
            </p>
            {fullLead.sourceTerm && <p className="text-xs text-gray-500">Suche: <span className="text-gray-300">{fullLead.sourceTerm}</span></p>}
            <p className="text-xs text-gray-500">Erfasst: {new Date(fullLead.capturedAt).toLocaleString("de-DE")}</p>
            {fullLead.serpRank && <p className="text-xs text-gray-500">SERP Rang: #{fullLead.serpRank}</p>}
            {fullLead.serpUrl && <a href={fullLead.serpUrl} target="_blank" rel="noreferrer" className="text-xs text-blue-400 hover:underline flex items-center gap-1"><ExternalLink className="w-3 h-3" />URL öffnen</a>}
          </div>

          {/* Tags */}
          <div className="bg-[#111118] rounded-lg border border-[#1e1e2e] p-3 space-y-2">
            <h3 className="text-xs font-semibold text-gray-400 uppercase tracking-wider">Tags</h3>
            <div className="flex flex-wrap gap-1.5">
              {tags.map(tag => (
                <span key={tag} className={`flex items-center gap-1 px-2 py-0.5 rounded-full text-xs border ${tagColor(tag)}`}>
                  {tag}
                  <button onClick={() => removeTag(tag)} className="hover:text-white"><X className="w-2.5 h-2.5" /></button>
                </span>
              ))}
            </div>
            <div className="flex flex-wrap gap-1">
              {TAG_PRESETS.filter(t => !tags.includes(t)).slice(0, 5).map(t => (
                <button key={t} onClick={() => addTag(t)} className="text-[10px] px-1.5 py-0.5 rounded border border-[#2e2e3e] text-gray-600 hover:text-gray-300 hover:border-[#4e4e6e]">
                  + {t}
                </button>
              ))}
            </div>
            <div className="flex gap-1.5">
              <input
                value={tagInput}
                onChange={e => setTagInput(e.target.value)}
                onKeyDown={e => { if (e.key === "Enter") { e.preventDefault(); addTag(tagInput); } }}
                placeholder="Tag hinzufügen..."
                className="flex-1 bg-[#0d0d18] border border-[#2e2e3e] rounded px-2 py-1 text-xs text-white outline-none focus:border-purple-500"
              />
              <button onClick={() => addTag(tagInput)} className="text-xs px-2 py-1 rounded bg-purple-500/20 text-purple-300 border border-purple-500/30">+</button>
            </div>
          </div>

          {/* Notes */}
          <div className="bg-[#111118] rounded-lg border border-[#1e1e2e] p-3 space-y-2">
            <h3 className="text-xs font-semibold text-gray-400 uppercase tracking-wider">Notizen</h3>
            <textarea
              value={notes}
              onChange={e => handleNotesChange(e.target.value)}
              placeholder="Notizen hier eingeben..."
              rows={4}
              className="w-full bg-[#0d0d18] border border-[#2e2e3e] rounded px-2 py-1.5 text-sm text-white outline-none focus:border-purple-500 resize-none"
            />
          </div>

          {/* Timeline */}
          {fullLead.events && fullLead.events.length > 0 && (
            <div className="bg-[#111118] rounded-lg border border-[#1e1e2e] p-3 space-y-2">
              <h3 className="text-xs font-semibold text-gray-400 uppercase tracking-wider">Verlauf</h3>
              <div className="space-y-1.5">
                <div className="flex items-start gap-2 text-xs text-gray-500">
                  <span className="mt-0.5">📥</span>
                  <div>
                    <span className="text-gray-400">Erfasst</span>
                    <span className="ml-2">{new Date(fullLead.capturedAt).toLocaleString("de-DE")}</span>
                  </div>
                </div>
                {fullLead.events.map(ev => (
                  <div key={ev.id} className="flex items-start gap-2 text-xs text-gray-500">
                    <span className="mt-0.5">✏️</span>
                    <div>
                      <span className="text-gray-400">{ev.event}</span>
                      <span className="ml-2">{new Date(ev.at).toLocaleString("de-DE")}</span>
                    </div>
                  </div>
                ))}
              </div>
            </div>
          )}
        </div>
      </div>
    </div>
  );
}

// ─── Main Page ─────────────────────────────────────────────────────────────────

export default function LeadVaultPage() {
  // Stats
  const [stats, setStats] = useState<Stats | null>(null);

  // Quick SERP
  const [serpOpen, setSerpOpen] = useState(false);
  const [serpQuery, setSerpQuery] = useState("");
  const [serpCount, setSerpCount] = useState("25");
  const [serpCountry, setSerpCountry] = useState("de");
  const [serpLanguage, setSerpLanguage] = useState("de");
  const [serpFilter, setSerpFilter] = useState(true);
  const [serpRunning, setSerpRunning] = useState(false);

  // Filters
  const [search, setSearch] = useState("");
  const [debouncedSearch, setDebouncedSearch] = useState("");
  const [filterStatus, setFilterStatus] = useState<string[]>([]);
  const [filterSource, setFilterSource] = useState<string[]>([]);
  const [filterPriority, setFilterPriority] = useState<string[]>([]);
  const [filterHasEmail, setFilterHasEmail] = useState("");
  const [filterSearchTerm, setFilterSearchTerm] = useState("");

  // Table
  const [leads, setLeads] = useState<Lead[]>([]);
  const [total, setTotal] = useState(0);
  const [page, setPage] = useState(1);
  const [perPage, setPerPage] = useState(50);
  const [pages, setPages] = useState(1);
  const [sortBy, setSortBy] = useState("capturedAt");
  const [sortDir, setSortDir] = useState<"asc" | "desc">("desc");
  const [loading, setLoading] = useState(false);
  const [selected, setSelected] = useState<Set<string>>(new Set());

  // Side panel
  const [panelLead, setPanelLead] = useState<Lead | null>(null);

  // Bulk
  const [bulkStatus, setBulkStatus] = useState("");
  const [bulkTag, setBulkTag] = useState("");

  // Debounce search
  useEffect(() => {
    const t = setTimeout(() => { setDebouncedSearch(search); setPage(1); }, 300);
    return () => clearTimeout(t);
  }, [search]);

  const loadStats = useCallback(async () => {
    const res = await fetch("/api/leads/stats");
    if (res.ok) setStats(await res.json() as Stats);
  }, []);

  const loadLeads = useCallback(async () => {
    setLoading(true);
    try {
      const params = new URLSearchParams({
        page: String(page), perPage: String(perPage),
        search: debouncedSearch, sortBy, sortDir,
      });
      filterStatus.forEach(s => params.append("status", s));
      filterSource.forEach(s => params.append("sourceTab", s));
      filterPriority.forEach(p => params.append("priority", p));
      if (filterHasEmail) params.set("hasEmail", filterHasEmail);
      if (filterSearchTerm) params.set("searchTerm", filterSearchTerm);

      const res = await fetch(`/api/leads?${params}`);
      if (res.ok) {
        const data = await res.json() as { leads: Lead[]; total: number; pages: number };
        setLeads(data.leads);
        setTotal(data.total);
        setPages(data.pages);
      }
    } finally {
      setLoading(false);
    }
  }, [page, perPage, debouncedSearch, sortBy, sortDir, filterStatus, filterSource, filterPriority, filterHasEmail, filterSearchTerm]);

  useEffect(() => { loadStats(); const t = setInterval(loadStats, 30000); return () => clearInterval(t); }, [loadStats]);
  useEffect(() => { loadLeads(); }, [loadLeads]);

  function toggleSort(field: string) {
    if (sortBy === field) setSortDir(d => d === "asc" ? "desc" : "asc");
    else { setSortBy(field); setSortDir("desc"); }
    setPage(1);
  }

  function toggleFilter(arr: string[], setArr: (v: string[]) => void, val: string) {
    setArr(arr.includes(val) ? arr.filter(x => x !== val) : [...arr, val]);
    setPage(1);
  }

  function clearFilters() {
    setSearch(""); setFilterStatus([]); setFilterSource([]);
    setFilterPriority([]); setFilterHasEmail(""); setFilterSearchTerm("");
    setPage(1);
  }

  async function updateLead(id: string, data: Partial<Lead>) {
    // Optimistic update
    setLeads(prev => prev.map(l => l.id === id ? { ...l, ...data } : l));
    if (panelLead?.id === id) setPanelLead(prev => prev ? { ...prev, ...data } : prev);

    const res = await fetch(`/api/leads/${id}`, {
      method: "PATCH",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(data),
    });
    if (!res.ok) {
      toast.error("Update fehlgeschlagen");
      loadLeads(); // Revert
    } else {
      loadStats();
    }
  }

  async function deleteLead(id: string) {
    if (!confirm("Lead löschen?")) return;
    await fetch(`/api/leads/${id}`, { method: "DELETE" });
    setLeads(prev => prev.filter(l => l.id !== id));
    setTotal(prev => prev - 1);
    if (panelLead?.id === id) setPanelLead(null);
    loadStats();
    toast.success("Lead gelöscht");
  }

  async function runQuickSerp() {
    if (!serpQuery.trim()) return toast.error("Suchbegriff eingeben");
    setSerpRunning(true);
    try {
      const res = await fetch("/api/leads/quick-serp", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ query: serpQuery, count: Number(serpCount), country: serpCountry, language: serpLanguage, filterSocial: serpFilter }),
      });
      const data = await res.json() as { added?: number; updated?: number; skipped?: number; error?: string };
      if (!res.ok) throw new Error(data.error || "Fehler");
      toast.success(`${data.added} Leads hinzugefügt, ${data.skipped} übersprungen`);
      loadLeads(); loadStats();
    } catch (err) {
      toast.error(err instanceof Error ? err.message : "Fehler");
    } finally {
      setSerpRunning(false);
    }
  }

  async function bulkAction(action: "status" | "priority" | "tag" | "delete", value: string) {
    if (!selected.size) return;
    if (action === "delete" && !confirm(`${selected.size} Leads löschen?`)) return;
    const res = await fetch("/api/leads/bulk", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ ids: Array.from(selected), action, value }),
    });
    if (res.ok) {
      const d = await res.json() as { updated: number };
      toast.success(`${d.updated} Leads aktualisiert`);
      setSelected(new Set());
      loadLeads(); loadStats();
    }
  }

  function exportFile(format: "csv" | "xlsx", emailOnly = false) {
    const params = new URLSearchParams({ search: debouncedSearch, sortBy, sortDir, format });
    filterStatus.forEach(s => params.append("status", s));
    filterSource.forEach(s => params.append("sourceTab", s));
    if (filterHasEmail) params.set("hasEmail", filterHasEmail);
    if (emailOnly) params.set("emailOnly", "true");
    window.open(`/api/leads/export?${params}`, "_blank");
  }

  function SortIcon({ field }: { field: string }) {
    if (sortBy !== field) return <ArrowUpDown className="w-3 h-3 text-gray-600" />;
    return sortDir === "asc" ? <ArrowUp className="w-3 h-3 text-purple-400" /> : <ArrowDown className="w-3 h-3 text-purple-400" />;
  }

  const allSelected = leads.length > 0 && leads.every(l => selected.has(l.id));

  return (
    <div className="space-y-5 max-w-[1400px]">
      {/* Header */}
      <div className="relative rounded-2xl bg-gradient-to-r from-purple-600/10 to-blue-600/10 border border-[#1e1e2e] p-6 overflow-hidden">
        <div className="absolute inset-0 bg-gradient-to-br from-purple-500/5 to-transparent" />
        <div className="relative flex items-center justify-between">
          <div>
            <div className="flex items-center gap-2 text-sm text-purple-400 mb-2">
              <Database className="w-4 h-4" />
              <span>Zentrale Datenbank</span>
            </div>
            <h1 className="text-2xl font-bold text-white">🗄️ LeadVault</h1>
            <p className="text-gray-400 mt-1 text-sm">Alle Leads aus allen Pipelines an einem Ort.</p>
          </div>
          <div className="flex gap-2">
            <button onClick={() => { loadLeads(); loadStats(); }} className="flex items-center gap-1.5 px-3 py-1.5 rounded-lg border border-[#2e2e3e] text-gray-400 hover:text-white hover:border-[#4e4e6e] text-sm transition-all">
              <RefreshCw className="w-3.5 h-3.5" /> Aktualisieren
            </button>
            <div className="relative group">
              <button className="flex items-center gap-1.5 px-3 py-1.5 rounded-lg border border-purple-500/30 bg-purple-500/10 text-purple-300 hover:bg-purple-500/20 text-sm transition-all">
                <Download className="w-3.5 h-3.5" /> Export
              </button>
              <div className="absolute right-0 top-9 hidden group-hover:block z-50 bg-[#1a1a28] border border-[#2e2e3e] rounded-lg shadow-xl p-1 min-w-[220px]">
                {[
                  ["Aktuelle Ansicht (CSV)", () => exportFile("csv")],
                  ["Aktuelle Ansicht (Excel)", () => exportFile("xlsx")],
                  ["Nur mit E-Mail (CSV)", () => exportFile("csv", true)],
                  ["Nur mit E-Mail (Excel)", () => exportFile("xlsx", true)],
                ].map(([label, fn]) => (
                  <button key={label as string} onClick={fn as () => void}
                    className="w-full text-left px-3 py-2 text-sm text-gray-300 hover:bg-[#2e2e3e] rounded">
                    {label as string}
                  </button>
                ))}
              </div>
            </div>
          </div>
        </div>
      </div>

      {/* Stats */}
      {stats && (
        <div className="grid grid-cols-4 gap-4">
          {[
            { label: "Leads gesamt", value: stats.total, color: "#a78bfa" },
            { label: "Neu / Nicht kontaktiert", value: stats.new, color: "#60a5fa" },
            { label: "Kontaktiert / In Bearbeitung", value: stats.contacted, color: "#2dd4bf" },
            { label: "Mit verifizierter E-Mail", value: stats.withEmail, color: "#34d399" },
          ].map(({ label, value, color }) => (
            <Card key={label} className="bg-[#111118] border-[#1e1e2e] p-4">
              <p className="text-xs text-gray-500 mb-1">{label}</p>
              <div className="flex items-end justify-between">
                <p className="text-2xl font-bold text-white">{value.toLocaleString()}</p>
                <Sparkline data={stats.dailyCounts.map(d => d.count)} color={color} />
              </div>
            </Card>
          ))}
        </div>
      )}

      {/* Quick SERP */}
      <Card className="bg-[#111118] border-[#1e1e2e] overflow-hidden">
        <button
          onClick={() => setSerpOpen(!serpOpen)}
          className="w-full flex items-center justify-between px-5 py-3.5 text-sm font-medium text-gray-300 hover:text-white transition-colors"
        >
          <span className="flex items-center gap-2"><Search className="w-4 h-4 text-purple-400" />⚡ Quick SERP Capture</span>
          {serpOpen ? <ChevronUp className="w-4 h-4" /> : <ChevronDown className="w-4 h-4" />}
        </button>
        {serpOpen && (
          <div className="px-5 pb-5 border-t border-[#1e1e2e] pt-4 space-y-4">
            <div className="grid grid-cols-2 gap-3">
              <div className="col-span-2">
                <Input
                  placeholder='Suchbegriff, z.B. "Dachdecker Freiburg"'
                  value={serpQuery}
                  onChange={e => setSerpQuery(e.target.value)}
                  onKeyDown={e => e.key === "Enter" && runQuickSerp()}
                  className="bg-[#0d0d18] border-[#2e2e3e] text-white placeholder:text-gray-600 focus:border-purple-500"
                />
              </div>
              <Select value={serpCount} onValueChange={v => setSerpCount(v ?? "25")}>
                <SelectTrigger className="bg-[#0d0d18] border-[#2e2e3e] text-white">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent className="bg-[#111118] border-[#2e2e3e]">
                  {["10", "25", "50", "100"].map(v => (
                    <SelectItem key={v} value={v} className="text-gray-300">{v} Ergebnisse</SelectItem>
                  ))}
                </SelectContent>
              </Select>
              <div className="flex gap-2">
                <Select value={serpCountry} onValueChange={v => setSerpCountry(v ?? "de")}>
                  <SelectTrigger className="bg-[#0d0d18] border-[#2e2e3e] text-white flex-1">
                    <SelectValue />
                  </SelectTrigger>
                  <SelectContent className="bg-[#111118] border-[#2e2e3e]">
                    {[["de","DE"],["at","AT"],["ch","CH"],["us","US"]].map(([v,l]) => (
                      <SelectItem key={v} value={v} className="text-gray-300">{l}</SelectItem>
                    ))}
                  </SelectContent>
                </Select>
                <Select value={serpLanguage} onValueChange={v => setSerpLanguage(v ?? "de")}>
                  <SelectTrigger className="bg-[#0d0d18] border-[#2e2e3e] text-white flex-1">
                    <SelectValue />
                  </SelectTrigger>
                  <SelectContent className="bg-[#111118] border-[#2e2e3e]">
                    {[["de","Deutsch"],["en","English"]].map(([v,l]) => (
                      <SelectItem key={v} value={v} className="text-gray-300">{l}</SelectItem>
                    ))}
                  </SelectContent>
                </Select>
              </div>
            </div>
            <div className="flex items-center justify-between">
              <label className="flex items-center gap-2 text-sm text-gray-400 cursor-pointer">
                <input type="checkbox" checked={serpFilter} onChange={e => setSerpFilter(e.target.checked)} className="rounded" />
                Social-Media / Verzeichnisse herausfiltern
              </label>
              <Button
                onClick={runQuickSerp}
                disabled={serpRunning || !serpQuery.trim()}
                className="bg-gradient-to-r from-purple-500 to-blue-600 hover:from-purple-600 hover:to-blue-700 text-white font-medium px-6"
              >
                {serpRunning ? "Suche läuft..." : "🔍 SERP Capture starten"}
              </Button>
            </div>
          </div>
        )}
      </Card>

      {/* Filter Bar */}
      <Card className="bg-[#111118] border-[#1e1e2e] p-4 space-y-3">
        <div className="flex items-center gap-3 flex-wrap">
          {/* Search */}
          <div className="relative flex-1 min-w-[200px]">
            <Search className="absolute left-2.5 top-1/2 -translate-y-1/2 w-3.5 h-3.5 text-gray-500" />
            <input
              value={search}
              onChange={e => setSearch(e.target.value)}
              placeholder="Domain, Firma, Name, E-Mail suchen..."
              className="w-full bg-[#0d0d18] border border-[#2e2e3e] rounded-lg pl-8 pr-3 py-1.5 text-sm text-white outline-none focus:border-purple-500"
            />
          </div>

          {/* Has Email toggle */}
          <div className="flex gap-1 bg-[#0d0d18] border border-[#2e2e3e] rounded-lg p-1">
            {[["", "Alle"], ["yes", "Mit E-Mail"], ["no", "Ohne E-Mail"]].map(([v, l]) => (
              <button key={v} onClick={() => { setFilterHasEmail(v); setPage(1); }}
                className={`px-2.5 py-1 rounded text-xs font-medium transition-all ${filterHasEmail === v ? "bg-purple-500/30 text-purple-300" : "text-gray-500 hover:text-gray-300"}`}>
                {l}
              </button>
            ))}
          </div>

          {/* Clear + count */}
          <div className="flex items-center gap-2 ml-auto">
            {(search || filterStatus.length || filterSource.length || filterPriority.length || filterHasEmail || filterSearchTerm) && (
              <button onClick={clearFilters} className="text-xs text-gray-500 hover:text-white flex items-center gap-1">
                <X className="w-3 h-3" /> Filter zurücksetzen
              </button>
            )}
            <span className="text-xs text-gray-500">{total.toLocaleString()} Leads</span>
          </div>
        </div>

        <div className="flex gap-2 flex-wrap">
          {/* Status filter */}
          <div className="flex gap-1 flex-wrap">
            {Object.entries(STATUS_CONFIG).map(([key, c]) => (
              <button key={key} onClick={() => toggleFilter(filterStatus, setFilterStatus, key)}
                className={`px-2.5 py-1 rounded-full text-xs border transition-all ${filterStatus.includes(key) ? c.bg + " " + c.color : "border-[#2e2e3e] text-gray-600 hover:text-gray-400"}`}>
                {c.label}
              </button>
            ))}
          </div>

          <div className="w-px bg-[#2e2e3e] mx-1" />

          {/* Source filter */}
          <div className="flex gap-1 flex-wrap">
            {Object.entries(SOURCE_CONFIG).map(([key, s]) => (
              <button key={key} onClick={() => toggleFilter(filterSource, setFilterSource, key)}
                className={`px-2.5 py-1 rounded-full text-xs border transition-all ${filterSource.includes(key) ? "bg-purple-500/20 text-purple-300 border-purple-500/30" : "border-[#2e2e3e] text-gray-600 hover:text-gray-400"}`}>
                {s.icon} {s.label}
              </button>
            ))}
          </div>

          <div className="w-px bg-[#2e2e3e] mx-1" />

          {/* Priority filter */}
          <div className="flex gap-1">
            {Object.entries(PRIORITY_CONFIG).map(([key, p]) => (
              <button key={key} onClick={() => toggleFilter(filterPriority, setFilterPriority, key)}
                className={`px-2.5 py-1 rounded-full text-xs border transition-all ${filterPriority.includes(key) ? "bg-[#2e2e3e] border-[#4e4e6e] " + p.color : "border-[#2e2e3e] text-gray-600 hover:text-gray-400"}`}>
                {p.icon} {p.label}
              </button>
            ))}
          </div>
        </div>
      </Card>

      {/* Bulk Actions */}
      {selected.size > 0 && (
        <div className="flex items-center gap-3 bg-purple-500/10 border border-purple-500/20 rounded-xl px-4 py-2.5">
          <span className="text-sm text-purple-300 font-medium">{selected.size} ausgewählt</span>
          <div className="flex gap-2 flex-wrap">
            <select
              value={bulkStatus}
              onChange={e => { setBulkStatus(e.target.value); if (e.target.value) bulkAction("status", e.target.value); }}
              className="bg-[#1a1a28] border border-[#2e2e3e] text-gray-300 text-xs rounded px-2 py-1"
            >
              <option value="">Status ändern...</option>
              {Object.entries(STATUS_CONFIG).map(([k, c]) => <option key={k} value={k}>{c.label}</option>)}
            </select>
            <div className="flex gap-1">
              <input
                value={bulkTag}
                onChange={e => setBulkTag(e.target.value)}
                placeholder="Tag hinzufügen..."
                className="bg-[#1a1a28] border border-[#2e2e3e] text-gray-300 text-xs rounded px-2 py-1 w-32 outline-none"
              />
              <button onClick={() => { if (bulkTag) { bulkAction("tag", bulkTag); setBulkTag(""); } }}
                className="text-xs px-2 py-1 rounded bg-[#2e2e3e] text-gray-300 hover:bg-[#3e3e5e]">
                <Tag className="w-3 h-3" />
              </button>
            </div>
            <button onClick={() => bulkAction("delete", "")}
              className="flex items-center gap-1 text-xs px-2.5 py-1 rounded bg-red-500/20 text-red-300 border border-red-500/30 hover:bg-red-500/30">
              <Trash2 className="w-3 h-3" /> Löschen
            </button>
            <button onClick={() => setSelected(new Set())} className="text-xs text-gray-500 hover:text-white px-2">✕</button>
          </div>
        </div>
      )}

      {/* Table */}
      <Card className="bg-[#111118] border-[#1e1e2e] overflow-hidden">
        <div className="overflow-x-auto">
          <table className="w-full text-sm">
            <thead>
              <tr className="border-b border-[#1e1e2e]">
                <th className="px-3 py-2.5 text-left">
                  <button onClick={() => {
                    if (allSelected) setSelected(new Set());
                    else setSelected(new Set(leads.map(l => l.id)));
                  }}>
                    {allSelected
                      ? <CheckSquare className="w-4 h-4 text-purple-400" />
                      : <Square className="w-4 h-4 text-gray-600" />}
                  </button>
                </th>
                {[
                  ["status", "Status"],
                  ["priority", "Priorität"],
                  ["companyName", "Unternehmen"],
                  ["contactName", "Kontakt"],
                  ["email", "E-Mail"],
                  ["sourceTab", "Quelle"],
                  ["capturedAt", "Erfasst"],
                ].map(([field, label]) => (
                  <th key={field} className="px-3 py-2.5 text-left text-xs font-medium text-gray-500 whitespace-nowrap">
                    <button onClick={() => toggleSort(field)} className="flex items-center gap-1 hover:text-gray-300">
                      {label} <SortIcon field={field} />
                    </button>
                  </th>
                ))}
                <th className="px-3 py-2.5 text-left text-xs font-medium text-gray-500">Tags</th>
                <th className="px-3 py-2.5 text-right text-xs font-medium text-gray-500">Aktionen</th>
              </tr>
            </thead>
            <tbody>
              {loading && !leads.length ? (
                <tr><td colSpan={10} className="px-4 py-8 text-center text-gray-500 text-sm">Lädt...</td></tr>
              ) : leads.length === 0 ? (
                <tr>
                  <td colSpan={10} className="px-4 py-16 text-center">
                    <Database className="w-8 h-8 text-gray-700 mx-auto mb-3" />
                    <p className="text-gray-500 text-sm">
                      {(search || filterStatus.length || filterSource.length)
                        ? "Keine Leads für diese Filter."
                        : "Noch keine Leads. Pipeline ausführen oder Quick SERP nutzen."}
                    </p>
                    {(search || filterStatus.length) && (
                      <button onClick={clearFilters} className="mt-2 text-xs text-purple-400 hover:underline">Filter zurücksetzen</button>
                    )}
                  </td>
                </tr>
              ) : leads.map((lead, i) => {
                const tags: string[] = JSON.parse(lead.tags || "[]");
                const isSelected = selected.has(lead.id);
                const isHigh = lead.priority === "high";
                const cfg = STATUS_CONFIG[lead.status] || STATUS_CONFIG.new;
                const prio = PRIORITY_CONFIG[lead.priority] || PRIORITY_CONFIG.normal;
                const src = SOURCE_CONFIG[lead.sourceTab];

                return (
                  <tr
                    key={lead.id}
                    onClick={() => setPanelLead(lead)}
                    className={`border-b border-[#1a1a28] cursor-pointer transition-colors hover:bg-[#1a1a28] ${
                      isSelected ? "bg-[#1a1a2e]" : i % 2 === 0 ? "bg-[#111118]" : "bg-[#0f0f16]"
                    } ${isHigh ? "border-l-2 border-l-red-500" : ""}`}
                  >
                    <td className="px-3 py-2.5" onClick={e => e.stopPropagation()}>
                      <button onClick={() => {
                        setSelected(prev => {
                          const n = new Set(prev);
                          if (n.has(lead.id)) n.delete(lead.id); else n.add(lead.id);
                          return n;
                        });
                      }}>
                        {isSelected
                          ? <CheckSquare className="w-4 h-4 text-purple-400" />
                          : <Square className="w-4 h-4 text-gray-600" />}
                      </button>
                    </td>
                    <td className="px-3 py-2.5" onClick={e => e.stopPropagation()}>
                      <StatusBadge status={lead.status} onChange={s => updateLead(lead.id, { status: s })} />
                    </td>
                    <td className="px-3 py-2.5">
                      <span className={`text-xs font-bold ${prio.color}`}>{prio.icon}</span>
                    </td>
                    <td className="px-3 py-2.5 max-w-[180px]">
                      <p className="text-sm text-white truncate font-medium">{lead.companyName || "–"}</p>
                      <p className="text-xs text-gray-500 truncate">{lead.domain}</p>
                    </td>
                    <td className="px-3 py-2.5 max-w-[160px]">
                      <p className="text-sm text-gray-300 truncate">{lead.contactName || "–"}</p>
                      {lead.contactTitle && <p className="text-xs text-gray-600 truncate">{lead.contactTitle}</p>}
                    </td>
                    <td className="px-3 py-2.5 max-w-[200px]" onClick={e => e.stopPropagation()}>
                      {lead.email ? (
                        <button
                          onClick={() => { navigator.clipboard.writeText(lead.email!); toast.success("E-Mail kopiert"); }}
                          className="text-xs font-mono text-green-400 hover:text-green-300 truncate block max-w-full"
                          title={lead.email}
                        >
                          {lead.email}
                        </button>
                      ) : (
                        <span className="text-xs text-gray-600">–</span>
                      )}
                      {lead.emailConfidence != null && lead.email && (
                        <div className="w-16 h-1 bg-[#2e2e3e] rounded-full mt-1">
                          <div
                            className={`h-full rounded-full ${lead.emailConfidence >= 0.8 ? "bg-green-500" : lead.emailConfidence >= 0.5 ? "bg-yellow-500" : "bg-red-500"}`}
                            style={{ width: `${lead.emailConfidence * 100}%` }}
                          />
                        </div>
                      )}
                    </td>
                    <td className="px-3 py-2.5">
                      <span className="text-xs text-gray-400">{src?.icon} {src?.label || lead.sourceTab}</span>
                    </td>
                    <td className="px-3 py-2.5 whitespace-nowrap" title={new Date(lead.capturedAt).toLocaleString("de-DE")}>
                      <span className="text-xs text-gray-500">{relativeTime(lead.capturedAt)}</span>
                    </td>
                    <td className="px-3 py-2.5">
                      <div className="flex gap-1 flex-wrap max-w-[120px]">
                        {tags.slice(0, 2).map(tag => (
                          <span key={tag} className={`text-[10px] px-1.5 py-0.5 rounded-full border ${tagColor(tag)}`}>{tag}</span>
                        ))}
                        {tags.length > 2 && <span className="text-[10px] text-gray-500">+{tags.length - 2}</span>}
                      </div>
                    </td>
                    <td className="px-3 py-2.5" onClick={e => e.stopPropagation()}>
                      <div className="flex items-center gap-1 justify-end">
                        <button onClick={() => updateLead(lead.id, { status: "contacted" })}
                          title="Als kontaktiert markieren"
                          className="p-1 rounded text-gray-600 hover:text-teal-400 hover:bg-teal-500/10 transition-all">
                          <Mail className="w-3.5 h-3.5" />
                        </button>
                        <button onClick={() => {
                          const cycle: Record<string, string> = { low: "normal", normal: "high", high: "low" };
                          updateLead(lead.id, { priority: cycle[lead.priority] || "normal" });
                        }}
                          title="Priorität wechseln"
                          className="p-1 rounded text-gray-600 hover:text-amber-400 hover:bg-amber-500/10 transition-all">
                          <Star className="w-3.5 h-3.5" />
                        </button>
                        {lead.domain && (
                          <a href={`https://${lead.domain}`} target="_blank" rel="noreferrer"
                            className="p-1 rounded text-gray-600 hover:text-blue-400 hover:bg-blue-500/10 transition-all">
                            <ExternalLink className="w-3.5 h-3.5" />
                          </a>
                        )}
                        <button onClick={() => deleteLead(lead.id)}
                          className="p-1 rounded text-gray-600 hover:text-red-400 hover:bg-red-500/10 transition-all">
                          <Trash2 className="w-3.5 h-3.5" />
                        </button>
                      </div>
                    </td>
                  </tr>
                );
              })}
            </tbody>
          </table>
        </div>

        {/* Pagination */}
        {pages > 1 && (
          <div className="flex items-center justify-between px-4 py-3 border-t border-[#1e1e2e]">
            <div className="flex items-center gap-2">
              <span className="text-xs text-gray-500">Zeilen pro Seite:</span>
              <select
                value={perPage}
                onChange={e => { setPerPage(Number(e.target.value)); setPage(1); }}
                className="bg-[#0d0d18] border border-[#2e2e3e] text-gray-300 text-xs rounded px-2 py-1"
              >
                {[25, 50, 100].map(n => <option key={n} value={n}>{n}</option>)}
              </select>
            </div>
            <div className="flex items-center gap-1">
              <button disabled={page <= 1} onClick={() => setPage(p => p - 1)}
                className="px-2.5 py-1 rounded text-xs text-gray-400 border border-[#2e2e3e] hover:border-[#4e4e6e] disabled:opacity-30">
                ‹ Zurück
              </button>
              {Array.from({ length: Math.min(7, pages) }, (_, i) => {
                let p = i + 1;
                if (pages > 7) {
                  if (page <= 4) p = i + 1;
                  else if (page >= pages - 3) p = pages - 6 + i;
                  else p = page - 3 + i;
                }
                return (
                  <button key={p} onClick={() => setPage(p)}
                    className={`w-7 h-7 rounded text-xs ${page === p ? "bg-purple-500/30 text-purple-300 border border-purple-500/30" : "text-gray-500 hover:text-gray-300"}`}>
                    {p}
                  </button>
                );
              })}
              <button disabled={page >= pages} onClick={() => setPage(p => p + 1)}
                className="px-2.5 py-1 rounded text-xs text-gray-400 border border-[#2e2e3e] hover:border-[#4e4e6e] disabled:opacity-30">
                Weiter ›
              </button>
            </div>
            <span className="text-xs text-gray-500">Seite {page} von {pages}</span>
          </div>
        )}
      </Card>

      {/* Side Panel */}
      {panelLead && (
        <SidePanel
          lead={panelLead}
          onClose={() => setPanelLead(null)}
          onUpdate={updated => {
            setLeads(prev => prev.map(l => l.id === panelLead.id ? { ...l, ...updated } : l));
          }}
        />
      )}
    </div>
  );
}