import React, { useState, useEffect, useCallback, useRef } from 'react';
import {
  X, Plus, Stethoscope, ShieldCheck, RotateCcw, Trash2, RefreshCw, Camera, ImagePlus, Save,
} from 'lucide-react';
import { HybridBackend } from '../services/backend.ts';
import { useToast } from '../contexts/ToastContext.tsx';
import { useConfirm } from '../contexts/ConfirmContext.tsx';

const COLOR = '#0d9488';
const inputCls = 'w-full px-3 py-2.5 bg-gray-50 border border-gray-200 rounded-xl text-sm font-medium text-gray-700 outline-none focus:border-teal-400 focus:bg-white transition-colors';
const labelCls = 'text-[11px] font-bold text-gray-500 mb-1.5 block';

const TIPO_META: Record<string, { label: string; cls: string }> = {
  novo: { label: 'Novo', cls: 'bg-teal-100 text-teal-700' },
  reabertura: { label: 'Reabertura', cls: 'bg-amber-100 text-amber-700' },
  garantia: { label: 'Garantia', cls: 'bg-violet-100 text-violet-700' },
};
const fmtBRL = (v: number) => Number(v || 0).toLocaleString('pt-BR', { style: 'currency', currency: 'BRL' });

// ─── Slot de foto (antes/depois) ──────────────────────────────────────────────
const FotoSlot: React.FC<{ url?: string; label: string; onPick: (f: File) => void; busy?: boolean }> = ({ url, label, onPick, busy }) => {
  const ref = useRef<HTMLInputElement>(null);
  return (
    <div className="flex-1">
      <p className="text-[10px] font-black text-gray-400 uppercase tracking-widest mb-1">{label}</p>
      <button type="button" disabled={busy} onClick={() => ref.current?.click()}
        className="w-full aspect-square rounded-xl border-2 border-dashed border-gray-200 hover:border-teal-300 bg-gray-50 overflow-hidden flex items-center justify-center transition-colors disabled:opacity-60">
        {busy ? <RefreshCw size={18} className="animate-spin text-teal-500" />
          : url ? <img src={url} alt={label} className="w-full h-full object-cover" />
            : <span className="flex flex-col items-center text-gray-300"><ImagePlus size={22} /><span className="text-[9px] font-bold mt-1">Enviar</span></span>}
      </button>
      <input ref={ref} type="file" accept="image/*" className="hidden" onChange={e => { const f = e.target.files?.[0]; if (f) onPick(f); e.currentTarget.value = ''; }} />
    </div>
  );
};

// ─── Card de procedimento realizado (busca o detalhe p/ fotos) ────────────────
const CardProc: React.FC<{ id: string; onRefazer: (r: any) => void; onExcluir: (id: string) => void; reloadKey: number }> = ({ id, onRefazer, onExcluir, reloadKey }) => {
  const toast = useToast();
  const [r, setR] = useState<any | null>(null);
  const [busy, setBusy] = useState<'antes' | 'depois' | null>(null);
  const carregar = useCallback(() => HybridBackend.getProcedimentoRealizado(id).then(setR), [id]);
  useEffect(() => { carregar(); }, [carregar, reloadKey]);

  const fotoDe = (m: string) => (r?.fotos || []).find((f: any) => f.momento === m)?.url;
  const enviar = async (momento: 'antes' | 'depois', file: File) => {
    setBusy(momento);
    try { await HybridBackend.uploadProcedimentoFoto(id, momento, file); toast.success('FOTO ENVIADA.'); await carregar(); }
    catch (e: any) { toast.error((e.message || 'ERRO').toUpperCase()); }
    finally { setBusy(null); }
  };

  if (!r) return <div className="bg-white rounded-2xl border border-gray-100 p-4 flex justify-center"><RefreshCw size={18} className="animate-spin text-teal-400" /></div>;
  const meta = TIPO_META[r.tipo] || TIPO_META.novo;
  return (
    <div className="bg-white rounded-2xl border border-gray-100 shadow-sm p-4">
      <div className="flex items-start justify-between gap-2 mb-2">
        <div className="min-w-0">
          <p className="font-black text-gray-800 text-sm uppercase truncate">{r.procedimento_nome || 'Procedimento'}</p>
          <p className="text-[10px] text-gray-400 font-bold uppercase">{r.profissional_nome || 'Profissional'} · {new Date(r.created_at).toLocaleDateString('pt-BR')}</p>
        </div>
        <div className="flex flex-col items-end gap-1 shrink-0">
          <span className={`text-[9px] font-black px-2 py-0.5 rounded-full uppercase ${meta.cls}`}>{meta.label}</span>
          {r.sem_comissao
            ? <span className="text-[9px] font-black px-2 py-0.5 rounded-full uppercase bg-gray-100 text-gray-500">Sem comissão</span>
            : Number(r.valor) > 0 && <span className="text-[9px] font-black px-2 py-0.5 rounded-full uppercase bg-emerald-100 text-emerald-700">{fmtBRL(r.valor)}</span>}
        </div>
      </div>
      <div className="flex gap-3 mt-3">
        <FotoSlot label="Antes" url={fotoDe('antes')} onPick={f => enviar('antes', f)} busy={busy === 'antes'} />
        <FotoSlot label="Depois" url={fotoDe('depois')} onPick={f => enviar('depois', f)} busy={busy === 'depois'} />
      </div>
      <div className="flex gap-2 mt-3">
        {r.tipo === 'novo' && (
          <button onClick={() => onRefazer(r)} className="flex-1 flex items-center justify-center gap-1.5 py-2 rounded-lg border border-violet-200 text-violet-600 hover:bg-violet-50 text-[10px] font-black uppercase transition-colors">
            <RotateCcw size={12} /> Refazer na garantia
          </button>
        )}
        <button onClick={() => onExcluir(r.id)} className="px-3 py-2 rounded-lg border border-red-200 text-red-500 hover:bg-red-50 text-[10px] font-black uppercase transition-colors"><Trash2 size={12} /></button>
      </div>
    </div>
  );
};

// ─── Modal principal ──────────────────────────────────────────────────────────
export const ProcedimentosProntuario: React.FC<{ patient: { id: string; nome: string }; onClose: () => void }> = ({ patient, onClose }) => {
  const toast = useToast();
  const confirm = useConfirm();
  const [lista, setLista] = useState<any[]>([]);
  const [dentistas, setDentistas] = useState<any[]>([]);
  const [loading, setLoading] = useState(false);
  const [reloadKey, setReloadKey] = useState(0);
  const [form, setForm] = useState({ procedimento_nome: '', profissional_id: '', valor: '', data_conclusao: new Date().toISOString().split('T')[0] });
  const [saving, setSaving] = useState(false);

  const carregar = useCallback(async () => {
    setLoading(true);
    try {
      const [ls, ds] = await Promise.all([HybridBackend.getProcedimentosRealizados(patient.id), HybridBackend.getDentistas()]);
      setLista(ls); setDentistas(Array.isArray(ds) ? ds : []);
    } catch { /* silent */ }
    finally { setLoading(false); }
  }, [patient.id]);
  useEffect(() => { carregar(); }, [carregar]);

  const refresh = () => { carregar(); setReloadKey(k => k + 1); };

  const registrar = async () => {
    if (!form.procedimento_nome.trim()) { toast.error('INFORME O PROCEDIMENTO.'); return; }
    setSaving(true);
    try {
      const dent = dentistas.find(d => d.id === form.profissional_id);
      await HybridBackend.saveProcedimentoRealizado({
        paciente_id: patient.id, paciente_nome: patient.nome,
        profissional_id: form.profissional_id || null, profissional_nome: dent?.nome || null,
        procedimento_nome: form.procedimento_nome, valor: form.valor === '' ? 0 : Number(form.valor), tipo: 'novo',
        data_conclusao: form.data_conclusao || null,
      });
      toast.success('PROCEDIMENTO REGISTRADO.');
      setForm(f => ({ procedimento_nome: '', profissional_id: '', valor: '', data_conclusao: f.data_conclusao }));
      refresh();
    } catch (e: any) { toast.error((e.message || 'ERRO').toUpperCase()); }
    finally { setSaving(false); }
  };

  const refazerGarantia = async (r: any) => {
    if (!await confirm(`REFAZER "${r.procedimento_nome}" na garantia? (sem comissão — registre as fotos antes/depois)`)) return;
    try {
      await HybridBackend.saveProcedimentoRealizado({
        paciente_id: patient.id, paciente_nome: patient.nome,
        profissional_id: r.profissional_id, profissional_nome: r.profissional_nome,
        procedimento_nome: `${r.procedimento_nome} (garantia)`, tipo: 'garantia', origem_id: r.id, valor: 0,
      });
      toast.success('GARANTIA REGISTRADA — ANEXE AS FOTOS ANTES/DEPOIS.');
      refresh();
    } catch (e: any) { toast.error((e.message || 'ERRO').toUpperCase()); }
  };

  const excluir = async (id: string) => {
    if (!await confirm('EXCLUIR este procedimento?')) return;
    try { await HybridBackend.deleteProcedimentoRealizado(id); toast.success('EXCLUÍDO.'); refresh(); }
    catch (e: any) { toast.error((e.message || 'ERRO').toUpperCase()); }
  };

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm p-4">
      <div className="bg-white rounded-2xl w-full max-w-3xl shadow-2xl overflow-hidden max-h-[92vh] flex flex-col">
        <div className="px-6 py-4 border-b border-gray-100 flex items-center justify-between">
          <div>
            <h3 className="text-sm font-black text-gray-900 uppercase flex items-center gap-2"><Stethoscope size={16} className="text-teal-600" /> Procedimentos · Prontuário</h3>
            <p className="text-[10px] font-bold uppercase tracking-widest text-teal-600">{patient.nome}</p>
          </div>
          <button onClick={onClose} className="p-2 hover:bg-gray-100 rounded-xl transition-colors"><X size={18} /></button>
        </div>

        {/* Registrar */}
        <div className="px-6 py-4 border-b border-gray-100 bg-gray-50/50">
          <div className="grid grid-cols-1 sm:grid-cols-12 gap-3 items-end">
            <div className="sm:col-span-4"><label className={labelCls}>Procedimento</label><input className={inputCls} value={form.procedimento_nome} onChange={e => setForm(f => ({ ...f, procedimento_nome: e.target.value }))} placeholder="Ex.: Restauração 26" /></div>
            <div className="sm:col-span-3"><label className={labelCls}>Profissional</label>
              <select className={inputCls} value={form.profissional_id} onChange={e => setForm(f => ({ ...f, profissional_id: e.target.value }))}>
                <option value="">Selecione…</option>
                {dentistas.map(d => <option key={d.id} value={d.id}>{d.nome}</option>)}
              </select>
            </div>
            <div className="sm:col-span-2"><label className={labelCls}>Valor</label><input type="number" min="0" className={inputCls} value={form.valor} onChange={e => setForm(f => ({ ...f, valor: e.target.value }))} placeholder="0,00" /></div>
            <div className="sm:col-span-2"><label className={labelCls}>Concluído em</label><input type="date" className={inputCls} value={form.data_conclusao} onChange={e => setForm(f => ({ ...f, data_conclusao: e.target.value }))} /></div>
            <div className="sm:col-span-1"><button onClick={registrar} disabled={saving} title="Registrar" className="w-full h-[42px] rounded-xl text-white flex items-center justify-center disabled:opacity-60" style={{ backgroundColor: COLOR }}>{saving ? <RefreshCw size={16} className="animate-spin" /> : <Plus size={18} />}</button></div>
          </div>
          <p className="text-[10px] text-gray-400 mt-2 flex items-center gap-1"><ShieldCheck size={11} className="text-violet-500" /> Reabertura/garantia pelo mesmo profissional não gera comissão.</p>
        </div>

        {/* Lista */}
        <div className="overflow-y-auto p-6">
          {loading ? <div className="flex justify-center py-12"><RefreshCw size={22} className="animate-spin" style={{ color: COLOR }} /></div>
            : lista.length === 0 ? <div className="text-center py-12 text-gray-400"><Camera size={36} className="mx-auto mb-3 opacity-40" /><p className="text-sm font-bold uppercase">Nenhum procedimento registrado</p></div>
              : <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                  {lista.map(r => <CardProc key={r.id} id={r.id} reloadKey={reloadKey} onRefazer={refazerGarantia} onExcluir={excluir} />)}
                </div>}
        </div>
      </div>
    </div>
  );
};