import React, { useState, useEffect } from 'react';
import { FlaskConical, Building2, Clock, ShieldCheck, AlertTriangle, CheckCircle2, Circle, Package, History, Camera, MapPin, ChevronRight, Loader2 } from 'lucide-react';
import { HybridBackend } from '../services/backend.ts';

const fmtBRL = (v: number) => 'R$ ' + Number(v || 0).toLocaleString('pt-BR', { minimumFractionDigits: 2 });
const dataBR = (d: string) => (d || '').slice(0, 10).split('-').reverse().join('/');
const dataHoraBR = (d: string) => { if (!d) return ''; const x = new Date(d); return isNaN(x.getTime()) ? dataBR(d) : x.toLocaleString('pt-BR', { day: '2-digit', month: '2-digit', year: '2-digit', hour: '2-digit', minute: '2-digit' }); };

const STATUS_LABEL: Record<string, string> = { solicitado: 'Solicitado', recebido: 'Recebido', producao: 'Em produção', prova: 'Prova', ajuste: 'Ajuste', finalizado: 'Finalizado', entregue: 'Entregue', cancelado: 'Cancelado' };
const STATUS_COR: Record<string, string> = { solicitado: 'bg-gray-100 text-gray-600', recebido: 'bg-blue-100 text-blue-700', producao: 'bg-amber-100 text-amber-700', prova: 'bg-indigo-100 text-indigo-700', ajuste: 'bg-orange-100 text-orange-700', finalizado: 'bg-teal-100 text-teal-700', entregue: 'bg-green-100 text-green-700', cancelado: 'bg-red-100 text-red-600' };
const FLUXO = ['solicitado', 'recebido', 'producao', 'prova', 'ajuste', 'finalizado', 'entregue'];
const OCOR_CATS: Record<string, string> = { nao_devolvido: 'Componente não devolvido', danificado: 'Componente danificado', incompativel: 'Componente incompatível', parafuso_substituido: 'Parafuso substituído', parafuso_desgastado: 'Parafuso desgastado', peca_incorreta: 'Peça incorreta', ajuste_inadequado: 'Ajuste inadequado', falha_fabricacao: 'Falha de fabricação', retrabalho: 'Retrabalho', outro: 'Outro' };

const Secao: React.FC<{ titulo: string; Icon: any; children: React.ReactNode }> = ({ titulo, Icon, children }) => (
  <div className="bg-white rounded-2xl border border-gray-100 shadow-sm p-4">
    <p className="text-[10px] font-black text-gray-400 uppercase tracking-widest mb-3 flex items-center gap-1.5"><Icon size={12} /> {titulo}</p>
    {children}
  </div>
);

export const ProtesePublicView: React.FC<{ token: string }> = ({ token }) => {
  const [os, setOs] = useState<any>(null);
  const [erro, setErro] = useState('');
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    HybridBackend.getProtesePublic(token).then(setOs).catch(e => setErro(e.message || 'Link inválido.')).finally(() => setLoading(false));
  }, [token]);

  if (loading) return <div className="min-h-screen flex items-center justify-center bg-gray-50"><Loader2 className="animate-spin text-teal-600" size={32} /></div>;
  if (erro || !os) return (
    <div className="min-h-screen flex flex-col items-center justify-center bg-gray-50 p-6 text-center">
      <AlertTriangle size={40} className="text-amber-400" />
      <p className="mt-3 font-black text-gray-700 uppercase text-sm">{erro || 'Link inválido'}</p>
      <p className="text-xs text-gray-400 mt-1">Peça um novo link à clínica.</p>
    </div>
  );

  const noLab = (os.local_atual || 'clinica') === 'laboratorio';
  const idxAtual = FLUXO.indexOf(os.status);
  const cancelado = os.status === 'cancelado';

  return (
    <div className="min-h-screen bg-gray-50">
      {/* Topo / marca */}
      <header className="bg-[#2d6a4f] text-white px-4 py-3 flex items-center gap-2 sticky top-0 z-10">
        <FlaskConical size={18} />
        <div className="min-w-0 flex-1">
          <p className="font-black text-sm leading-tight">ScoreOdonto</p>
          <p className="text-[10px] text-white/70 uppercase tracking-wide leading-tight">Acompanhamento de prótese</p>
        </div>
        <span className="text-[9px] font-black px-2 py-0.5 rounded-full bg-white/15 uppercase">Somente leitura</span>
      </header>

      <main className="max-w-lg mx-auto p-3 space-y-3">
        {/* Cabeçalho da OS */}
        <div className="bg-white rounded-2xl border border-gray-100 shadow-sm p-4">
          <div className="flex items-start justify-between gap-2">
            <div className="min-w-0">
              <h1 className="font-black text-gray-800 text-base leading-tight">{os.tipo}</h1>
              <p className="text-xs text-gray-400 mt-0.5">OS {os.id}</p>
            </div>
            <span className={`text-[9px] font-black px-2 py-1 rounded-full uppercase shrink-0 ${STATUS_COR[os.status] || 'bg-gray-100 text-gray-600'}`}>{STATUS_LABEL[os.status] || os.status}</span>
          </div>
          <div className="mt-3 flex flex-wrap items-center gap-2">
            {os.clinica_nome && <span className="text-[10px] font-black text-blue-700 bg-blue-50 px-2 py-1 rounded-lg uppercase flex items-center gap-1"><Building2 size={11} /> {os.clinica_nome}</span>}
            <span className={`text-[10px] font-black px-2 py-1 rounded-lg uppercase flex items-center gap-1 ${noLab ? 'bg-violet-50 text-violet-700' : 'bg-blue-50 text-blue-700'}`}><MapPin size={11} /> {noLab ? 'Com o laboratório' : 'Na clínica'}</span>
            {os.tipo_os === 'garantia' && <span className="text-[10px] font-black text-emerald-700 bg-emerald-50 px-2 py-1 rounded-lg uppercase flex items-center gap-1"><ShieldCheck size={11} /> Garantia</span>}
          </div>
        </div>

        {/* Etapas */}
        <Secao titulo="Etapas" Icon={Clock}>
          {cancelado ? (
            <div className="bg-red-50 rounded-xl px-3 py-2 text-xs font-black text-red-600 uppercase">OS cancelada</div>
          ) : (
            <div className="flex items-start overflow-x-auto pb-1 -mx-1 px-1">
              {FLUXO.map((s, i) => {
                const done = i < idxAtual, atual = i === idxAtual;
                const ev = (os.eventos || []).find((e: any) => e.status === s);
                return (
                  <React.Fragment key={s}>
                    <div className="flex flex-col items-center min-w-[52px]">
                      {done ? <CheckCircle2 size={18} className="text-teal-600" /> : atual ? <div className="w-4 h-4 rounded-full bg-[#2d6a4f] ring-4 ring-green-100" /> : <Circle size={18} className="text-gray-200" />}
                      <span className={`text-[7px] font-black uppercase mt-1 text-center leading-tight ${atual ? 'text-[#2d6a4f]' : done ? 'text-teal-700' : 'text-gray-300'}`}>{STATUS_LABEL[s]}</span>
                      <span className="text-[7px] text-gray-300">{ev ? dataBR(ev.created_at) : ''}</span>
                    </div>
                    {i < FLUXO.length - 1 && <div className={`flex-1 h-0.5 mt-2 min-w-[8px] ${i < idxAtual ? 'bg-teal-400' : 'bg-gray-100'}`} />}
                  </React.Fragment>
                );
              })}
            </div>
          )}
        </Secao>

        {/* Dados */}
        <Secao titulo="Dados do trabalho" Icon={FlaskConical}>
          <div className="grid grid-cols-2 gap-x-3 gap-y-2 text-xs">
            {os.paciente_nome && <div className="col-span-2"><span className="text-gray-400 font-bold uppercase text-[9px] block">Paciente</span>{os.paciente_nome}</div>}
            {os.dentista_nome && <div><span className="text-gray-400 font-bold uppercase text-[9px] block">Dentista</span>{os.dentista_nome}</div>}
            {os.dentes && <div><span className="text-gray-400 font-bold uppercase text-[9px] block">Dentes</span>{os.dentes}</div>}
            {os.material && <div><span className="text-gray-400 font-bold uppercase text-[9px] block">Material</span>{os.material}</div>}
            {os.cor && <div><span className="text-gray-400 font-bold uppercase text-[9px] block">Cor</span>{os.cor}</div>}
            {os.prazo_entrega && <div><span className="text-gray-400 font-bold uppercase text-[9px] block">Prazo</span>{dataBR(os.prazo_entrega)}</div>}
            {Number(os.custo) > 0 && <div><span className="text-gray-400 font-bold uppercase text-[9px] block">Valor do lab</span>{fmtBRL(os.custo)}</div>}
          </div>
          {os.observacoes && <p className="text-xs text-gray-600 bg-gray-50 rounded-xl p-3 mt-3">{os.observacoes}</p>}
          {os.garantia_ate && <div className="bg-emerald-50 rounded-xl px-3 py-2 mt-3 flex items-center gap-2 text-xs text-emerald-700 font-bold"><ShieldCheck size={14} /> Garantia até {dataBR(os.garantia_ate)}</div>}
        </Secao>

        {/* Componentes */}
        {(os.componentes || []).length > 0 && (
          <Secao titulo="Componentes" Icon={Package}>
            <div className="space-y-1.5">
              {os.componentes.map((c: any) => (
                <div key={c.id} className="flex items-center gap-2 text-xs bg-gray-50 rounded-lg px-3 py-2">
                  <span className={`text-[8px] font-black px-1.5 py-0.5 rounded uppercase ${c.direcao === 'devolvido' ? 'bg-blue-100 text-blue-700' : 'bg-teal-100 text-teal-700'}`}>{c.direcao === 'devolvido' ? 'Devolvido' : 'Enviado'}</span>
                  <span className="font-black text-gray-700">{c.quantidade}×</span>
                  <span className="font-bold text-gray-700 flex-1 truncate">{c.nome}</span>
                </div>
              ))}
            </div>
          </Secao>
        )}

        {/* Fotos */}
        {(os.fotos || []).length > 0 && (
          <Secao titulo="Fotos do trabalho" Icon={Camera}>
            <div className="grid grid-cols-2 gap-2">
              {os.fotos.map((f: any) => (
                <a key={f.id} href={f.url} target="_blank" rel="noreferrer" className="block rounded-lg overflow-hidden border border-gray-100">
                  <img src={f.url} alt="" className="w-full h-24 object-cover" />
                  {f.legenda && <p className="text-[10px] font-bold text-gray-600 truncate px-2 py-1">{f.legenda}</p>}
                </a>
              ))}
            </div>
          </Secao>
        )}

        {/* Ocorrências */}
        {(os.ocorrencias || []).length > 0 && (
          <Secao titulo="Ocorrências" Icon={AlertTriangle}>
            <div className="space-y-2">
              {os.ocorrencias.map((o: any) => (
                <div key={o.id} className="border border-gray-100 rounded-xl p-2.5 text-xs">
                  <div className="flex items-center gap-2">
                    <span className="text-[8px] font-black px-1.5 py-0.5 rounded uppercase bg-gray-100 text-gray-600">{(o.status || '').replace('_', ' ')}</span>
                    <span className="font-black text-gray-700 flex-1">{OCOR_CATS[o.categoria] || o.categoria}</span>
                  </div>
                  <p className="text-gray-600 mt-1">{o.descricao}</p>
                  {o.resposta && <p className="text-gray-500 mt-1"><b className="uppercase text-[9px]">Resposta:</b> {o.resposta}</p>}
                </div>
              ))}
            </div>
          </Secao>
        )}

        {/* Histórico */}
        <Secao titulo="Histórico" Icon={History}>
          <div className="space-y-2">
            {(os.eventos || []).map((ev: any, i: number) => (
              <div key={i} className="flex items-start gap-2 text-xs">
                <span className={`w-2 h-2 rounded-full mt-1 shrink-0 ${ev.status === 'cancelado' ? 'bg-red-400' : ev.status === 'entregue' ? 'bg-green-500' : 'bg-[#2d6a4f]'}`} />
                <div className="min-w-0">
                  <span className="font-bold text-gray-700">{ev.observacao || STATUS_LABEL[ev.status] || ev.status}</span>
                  <span className="text-gray-400 block text-[10px]">{dataHoraBR(ev.created_at)}{ev.actor_nome ? ` · ${ev.actor_nome}` : ''}</span>
                </div>
              </div>
            ))}
          </div>
        </Secao>

        {/* CTA de conversão */}
        <a href="/" className="block bg-[#2d6a4f] text-white rounded-2xl p-4 text-center active:scale-[0.99] transition-transform">
          <p className="font-black text-sm uppercase">Gostou de acompanhar por aqui?</p>
          <p className="text-[11px] text-white/80 mt-1">Crie sua conta grátis e gerencie seu laboratório: bancada, etapas, financeiro e score.</p>
          <span className="inline-flex items-center gap-1 mt-2 bg-white text-[#2d6a4f] font-black text-xs uppercase px-4 py-2 rounded-xl">Criar conta grátis <ChevronRight size={14} /></span>
        </a>
        <p className="text-center text-[10px] text-gray-300 uppercase font-bold pb-4">ScoreOdonto · Provedor de Prótese</p>
      </main>
    </div>
  );
};