import { 
  FileText, 
  Download, 
  Plus, 
  Search, 
  Filter, 
  ChevronRight, 
  MoreHorizontal, 
  ArrowUpRight,
  Mail,
  CreditCard,
  Cloud,
  TrendingUp,
  AlertCircle,
  CheckCircle2
} from 'lucide-react';
import { motion } from 'motion/react';
import { cn } from '../lib/utils';

export default function FacturacionView() {
  return (
    <div className="p-12 max-w-[1800px] mx-auto space-y-12">
      <header className="flex justify-between items-end">
        <div>
          <nav className="flex items-center gap-2 text-[9px] font-bold uppercase tracking-tighter text-on-surface-variant mb-2">
            <span>Finanzas</span>
            <ChevronRight className="w-3 h-3" />
            <span className="text-primary">Cartera de Cobranza</span>
          </nav>
          <h1 className="text-3xl font-extrabold font-headline tracking-tighter text-on-surface">Cuentas por Cobrar</h1>
        </div>
        <div className="flex gap-3">
          <button className="px-4 py-2 border border-surface-container-high text-on-surface font-bold text-[10px] uppercase tracking-widest flex items-center gap-2 hover:bg-white transition-all">
            <Download className="w-4 h-4" />
            Exportar Reporte
          </button>
          <button className="clinical-gradient text-white px-6 py-2 text-[10px] font-bold uppercase tracking-widest rounded-sm flex items-center gap-2 shadow-lg shadow-primary/20">
            <Plus className="w-4 h-4" />
            Nueva Factura
          </button>
        </div>
      </header>

      {/* KPI Row */}
      <div className="grid grid-cols-1 md:grid-cols-3 gap-6">
        <KPICard 
          label="Total por Cobrar" 
          value="$1,245,000.00" 
          sub="+4.2% vs mes anterior" 
          progress={68} 
          progressLabel="Ejecución Meta"
          icon={CreditCard}
          color="primary"
        />
        <KPICard 
          label="Vencido Hoy" 
          value="$12,400.00" 
          sub="Crítico" 
          progress={15} 
          progressLabel="Incidencia Riesgo"
          icon={AlertCircle}
          color="error"
          critical
        />
        <KPICard 
          label="Cobrado Este Mes" 
          value="$450,200.00" 
          sub="+12% Cobranza efectiva" 
          progress={82} 
          progressLabel="Eficiencia Recuperación"
          icon={CheckCircle2}
          color="secondary"
        />
      </div>

      <div className="grid grid-cols-1 xl:grid-cols-4 gap-6">
        {/* Table Section */}
        <div className="xl:col-span-3 bg-white rounded-sm shadow-sm border border-surface-container-high overflow-hidden">
          <div className="p-5 border-b border-surface-container-high flex flex-col sm:flex-row justify-between items-center gap-4">
            <h3 className="font-headline font-bold text-lg">Cartera de Clientes</h3>
            <div className="flex items-center gap-3 w-full sm:w-auto">
              <div className="relative flex-grow">
                <Search className="absolute left-3 top-1/2 -translate-y-1/2 text-on-surface-variant w-4 h-4" />
                <input 
                  type="text" 
                  placeholder="Buscar por factura o cliente..." 
                  className="pl-10 pr-4 py-2 bg-surface-container-low border-none text-xs w-full sm:w-64 rounded-sm focus:ring-1 focus:ring-secondary/50"
                />
              </div>
              <button className="p-2 bg-surface-container-low hover:bg-surface-container-high transition-colors rounded-sm">
                <Filter className="w-4 h-4 text-on-surface-variant" />
              </button>
            </div>
          </div>
          <div className="overflow-x-auto">
            <table className="w-full text-left border-collapse">
              <thead>
                <tr className="bg-surface-container-low">
                  <th className="px-6 py-4 text-[10px] font-bold uppercase text-on-surface-variant tracking-widest">Factura</th>
                  <th className="px-6 py-4 text-[10px] font-bold uppercase text-on-surface-variant tracking-widest">Cliente</th>
                  <th className="px-6 py-4 text-[10px] font-bold uppercase text-on-surface-variant tracking-widest">Emisión / Venc.</th>
                  <th className="px-6 py-4 text-[10px] font-bold uppercase text-on-surface-variant tracking-widest">Monto</th>
                  <th className="px-6 py-4 text-[10px] font-bold uppercase text-on-surface-variant tracking-widest">Días</th>
                  <th className="px-6 py-4 text-[10px] font-bold uppercase text-on-surface-variant tracking-widest text-center">Estado</th>
                  <th className="px-6 py-4 text-[10px] font-bold uppercase text-on-surface-variant tracking-widest text-right">Acciones</th>
                </tr>
              </thead>
              <tbody className="divide-y divide-surface-container-low">
                {[
                  { id: 'F-45920', client: 'Médica Campestre S.A.', rfc: 'MCA980211K22', date: '15/03/2025', due: '15/04/2025', amount: '$245,000.00', days: '+20 Días', status: 'VENCIDA', statusColor: 'bg-primary/10 text-primary' },
                  { id: 'F-46102', client: 'Dental Health Group', rfc: 'DHG120505R90', date: '01/05/2025', due: '31/05/2025', amount: '$82,450.00', days: '26 Días rem.', status: 'VIGENTE', statusColor: 'bg-secondary/10 text-secondary' },
                ].map((row) => (
                  <tr key={row.id} className="hover:bg-surface-container-low/30 transition-colors group">
                    <td className="px-6 py-4 font-bold text-xs text-on-surface">{row.id}</td>
                    <td className="px-6 py-4">
                      <div className="flex items-center gap-3">
                        <div className="w-7 h-7 rounded-sm bg-surface-container-low flex items-center justify-center text-[10px] font-bold text-on-surface-variant">
                          {row.client.split(' ').map(n => n[0]).join('').slice(0, 2)}
                        </div>
                        <div>
                          <p className="text-xs font-semibold text-on-surface">{row.client}</p>
                          <p className="text-[9px] text-on-surface-variant font-bold uppercase">{row.rfc}</p>
                        </div>
                      </div>
                    </td>
                    <td className="px-6 py-4">
                      <p className="text-xs text-on-surface font-medium">{row.date}</p>
                      <p className={cn("text-[9px] font-bold uppercase", row.status === 'VENCIDA' ? "text-primary" : "text-on-surface-variant")}>{row.due}</p>
                    </td>
                    <td className="px-6 py-4 font-bold text-xs text-on-surface">{row.amount}</td>
                    <td className={cn("px-6 py-4 text-xs font-bold", row.status === 'VENCIDA' ? "text-primary" : "text-on-surface-variant")}>{row.days}</td>
                    <td className="px-6 py-4 text-center">
                      <span className={cn("px-2 py-1 text-[8px] font-bold rounded-full uppercase", row.statusColor)}>
                        {row.status}
                      </span>
                    </td>
                    <td className="px-6 py-4 text-right">
                      <div className="flex justify-end gap-2">
                        <button className="w-8 h-8 flex items-center justify-center rounded-sm border border-secondary text-secondary hover:bg-secondary/10 transition-all"><CreditCard className="w-4 h-4" /></button>
                        <button className="w-8 h-8 flex items-center justify-center rounded-sm bg-surface-container-low text-on-surface-variant hover:text-primary transition-all"><Mail className="w-4 h-4" /></button>
                        <button className="px-3 h-8 flex items-center justify-center rounded-sm clinical-gradient text-white text-[8px] font-bold uppercase tracking-tight">CFDI</button>
                      </div>
                    </td>
                  </tr>
                ))}
              </tbody>
            </table>
          </div>
        </div>

        {/* Sidebar Insights */}
        <div className="space-y-6">
          <div className="bg-white p-5 rounded-sm border border-surface-container-high shadow-sm">
            <div className="flex items-center gap-3 mb-4">
              <div className="p-2 rounded-sm bg-secondary/10 text-secondary">
                <Cloud className="w-5 h-5" />
              </div>
              <div>
                <h4 className="text-[10px] font-bold text-on-surface uppercase tracking-widest">PAC STATUS</h4>
                <p className="text-[9px] text-secondary font-bold uppercase">Connected SW Sapien</p>
              </div>
            </div>
            <div className="space-y-3">
              <div className="flex justify-between items-center text-[10px]">
                <span className="text-on-surface-variant font-medium">Validación CFDI 4.0</span>
                <span className="text-secondary font-bold flex items-center gap-1">Online <div className="w-1.5 h-1.5 rounded-full bg-secondary" /></span>
              </div>
              <div className="flex justify-between items-center text-[10px]">
                <span className="text-on-surface-variant font-medium">Timbres Disponibles</span>
                <span className="text-on-surface font-bold">12,450</span>
              </div>
            </div>
          </div>

          <div className="bg-white p-5 rounded-sm border border-surface-container-high shadow-sm">
            <h4 className="text-[10px] font-bold text-on-surface-variant uppercase tracking-widest mb-4">Tendencia</h4>
            <div className="h-32 flex items-end gap-1">
              {[40, 65, 45, 95, 75].map((h, i) => (
                <div 
                  key={i} 
                  className={cn(
                    "flex-1 rounded-t-sm transition-all duration-500",
                    i === 3 ? "bg-primary" : i === 4 ? "bg-secondary" : "bg-surface-container-high"
                  )} 
                  style={{ height: `${h}%` }} 
                />
              ))}
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}

function KPICard({ label, value, sub, progress, progressLabel, icon: Icon, color, critical }: any) {
  return (
    <div className="bg-white p-6 rounded-sm border-b-2 border-surface-container-high shadow-sm relative overflow-hidden">
      <div className="flex justify-between items-start mb-4">
        <div className={cn("w-10 h-10 rounded-sm flex items-center justify-center", critical ? "bg-primary/10 text-primary" : "bg-surface-container-high text-on-surface-variant")}>
          <Icon className="w-5 h-5" />
        </div>
        <span className={cn("text-[10px] font-bold uppercase", critical ? "text-primary" : "text-secondary")}>{sub}</span>
      </div>
      <p className="text-[10px] text-on-surface-variant uppercase tracking-widest mb-1">{label}</p>
      <h2 className="text-2xl font-bold font-headline text-on-surface mb-4">{value}</h2>
      <div className="w-full bg-surface-container-low h-1.5 rounded-full overflow-hidden">
        <div className={cn("h-full", critical ? "bg-primary" : "bg-secondary")} style={{ width: `${progress}%` }} />
      </div>
      <div className="mt-2 flex justify-between text-[8px] font-bold text-on-surface-variant uppercase">
        <span>{progressLabel}</span>
        <span>{progress}%</span>
      </div>
    </div>
  );
}