import type { FC } from 'react';
import { useEffect, useMemo, useRef, useState } from 'react';
import { useSearchParams } from 'react-router-dom';
import { Phone, MapPin, Mail, Globe, Save, Building2, ArrowRightLeft, Percent, Check, Calculator } from 'lucide-react';
import Layout from '../components/Layout';
import UsuariosPanel from '../components/UsuariosPanel';
import RolesPanel from '../components/RolesPanel';
import RecetasPanel from '../components/RecetasPanel';
import CatalogoPanel from '../components/CatalogoPanel';
import AuditoriaPanel from '../components/AuditoriaPanel';
import TicketDesigner from '../components/TicketDesigner';
import ImpactoModal from '../components/ImpactoModal';
import { Card, Button, Input, PageHeader, toast } from '../components/ui';
import { odooApi, type Doctor, BRAND_DEFAULT } from '../services/odoo';
import { useAuth } from '../lib/auth';

const TABS = [
  { key: 'clinica', label: 'Clínica' },
  { key: 'usuarios', label: 'Usuarios' },
  { key: 'roles', label: 'Roles' },
  { key: 'recetas', label: 'Recetas' },
  { key: 'catalogos', label: 'Catálogos' },
  { key: 'tickets', label: 'Tickets' },
  { key: 'auditoria', label: 'Auditoría' },
] as const;

const SUBCATALOGOS = [
  { key: 'diagnosticos', label: 'Diagnósticos' },
  { key: 'procedimientos', label: 'Procedimientos' },
] as const;

interface ClinicSettings {
  name: string;
  phone: string;
  email: string;
  address: string;
  website: string;
}

const defaultSettings: ClinicSettings = {
  name: 'SKEEN Derma Experts',
  phone: '+52 (661) 100-2172',
  email: 'hola@skeen.mx',
  address: 'Playas de Rosarito, Baja California',
  website: 'https://skeen.mx',
};

const STORAGE_KEY = 'skeen_clinic_settings';

const Configuracion: FC = () => {
  const { user, brand, setBrand } = useAuth();
  // Gerencia gestiona usuarios y roles; la sección "Clínica" (tipo de cambio y
  // comisiones) queda para administración del sistema.
  const esAdmin = user?.role === 'admin';
  const tabsVisibles = useMemo(
    () => (esAdmin
      ? TABS
      : TABS.filter((t) => t.key === 'usuarios' || t.key === 'roles' || t.key === 'tickets')),
    [esAdmin],
  );
  const [searchParams, setSearchParams] = useSearchParams();
  const tabPedida = searchParams.get('tab') || 'clinica';
  const tab = tabsVisibles.some((t) => t.key === tabPedida) ? tabPedida : tabsVisibles[0].key;
  const setTab = (t: string) => setSearchParams({ tab: t });
  const [subcatalogo, setSubcatalogo] = useState<string>(() => {
    const sub = searchParams.get('sub');
    return sub === 'procedimientos' ? 'procedimientos' : 'diagnosticos';
  });
  const [settings, setSettings] = useState<ClinicSettings>(() => ({
    ...defaultSettings,
    // El nombre default sigue al brand (white-label); teléfono/dirección
    // quedan en localStorage o los valores históricos de la clínica.
    name: brand.nombre,
  }));
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    try {
      const saved = localStorage.getItem(STORAGE_KEY);
      if (saved) setSettings(JSON.parse(saved));
    } catch {
      // ignore
    } finally {
      setLoading(false);
    }
  }, []);

  const save = () => {
    try {
      localStorage.setItem(STORAGE_KEY, JSON.stringify(settings));
      toast.success('Configuración guardada');
    } catch {
      toast.error('Error al guardar configuración');
    }
  };

  const update = (field: keyof ClinicSettings, value: string) => {
    setSettings((prev) => ({ ...prev, [field]: value }));
  };

  // ---- Tipo de cambio USD/MXN ----
  const [tcCurrent, setTcCurrent] = useState<{ rate: number; date: string; source: string } | null>(null);
  const [tcInput, setTcInput] = useState('');
  const [tcSaving, setTcSaving] = useState(false);
  // ---- Identidad de la clínica (brand white-label) ----
  const [brandForm, setBrandForm] = useState({
    nombre: '', pie: '', logo_claro: '', logo_oscuro: '',
  });
  const [brandSaving, setBrandSaving] = useState(false);
  const brandCargadoRef = useRef(false);
  useEffect(() => {
    if (brandCargadoRef.current || !brand.nombre) return;
    brandCargadoRef.current = true;
    setBrandForm({
      nombre: brand.nombre === BRAND_DEFAULT.nombre ? '' : brand.nombre,
      pie: brand.pie === BRAND_DEFAULT.pie ? '' : brand.pie,
      logo_claro: brand.logo_claro === BRAND_DEFAULT.logo_claro ? '' : brand.logo_claro,
      logo_oscuro: brand.logo_oscuro === BRAND_DEFAULT.logo_oscuro ? '' : brand.logo_oscuro,
    });
  }, [brand]);

  const saveBrand = async () => {
    setBrandSaving(true);
    try {
      const res = await odooApi.putBrand({
        brand: {
          nombre: brandForm.nombre.trim() || BRAND_DEFAULT.nombre,
          pie: brandForm.pie.trim() || BRAND_DEFAULT.pie,
          logo_claro: brandForm.logo_claro.trim() || BRAND_DEFAULT.logo_claro,
          logo_oscuro: brandForm.logo_oscuro.trim() || BRAND_DEFAULT.logo_oscuro,
        },
        motivo: 'Identidad desde Configuración',
      });
      setBrand(res.brand);
      toast.success('Identidad de la clínica actualizada (se ve al recargar en los demás equipos)');
    } catch {
      toast.error('No se pudo guardar la identidad de la clínica');
    } finally {
      setBrandSaving(false);
    }
  };

  useEffect(() => {
    if (!esAdmin) return;
    odooApi.getExchangeRate()
      .then((res) => {
        if (res.current) {
          setTcCurrent(res.current);
          setTcInput(String(res.current.rate));
        }
      })
      .catch(() => {/* odoo no disponible, ignorar */});
  }, []);

  const saveTc = async () => {
    const rate = parseFloat(tcInput);
    if (!rate || rate <= 0) {
      toast.error('Ingresa un tipo de cambio válido');
      return;
    }
    setTcSaving(true);
    try {
      const res = await odooApi.setExchangeRate(rate, 'manual');
      setTcCurrent(res.exchange_rate);
      toast.success(`Tipo de cambio actualizado: ${rate.toFixed(2)} MXN/USD`);
    } catch {
      toast.error('No se pudo guardar el tipo de cambio');
    } finally {
      setTcSaving(false);
    }
  };

  // ---- Comisiones de médicos ----
  const [commissionDefault, setCommissionDefault] = useState('');
  const [commissionDefaultSaving, setCommissionDefaultSaving] = useState(false);
  const [doctors, setDoctors] = useState<Doctor[]>([]);
  const [commissionInputs, setCommissionInputs] = useState<Record<number, string>>({});
  const [commissionSavingId, setCommissionSavingId] = useState<number | null>(null);
  const [commissionSavedId, setCommissionSavedId] = useState<number | null>(null);
  const [impactoOpen, setImpactoOpen] = useState(false);

  useEffect(() => {
    if (!esAdmin) return;
    odooApi.getCommissionDefault()
      .then((res) => setCommissionDefault(String(res.commission_pct ?? 0)))
      .catch(() => {/* odoo no disponible, ignorar */});
    odooApi.getDoctors()
      .then((res) => {
        if (res.status === 'success') {
          setDoctors(res.doctors);
          setCommissionInputs(Object.fromEntries(res.doctors.map((d) => [d.id, String(d.commission_pct ?? 0)])));
        }
      })
      .catch(() => {/* odoo no disponible, ignorar */});
  }, []);

  const validPct = (raw: string): number | null => {
    const pct = parseFloat(raw);
    if (Number.isNaN(pct) || pct < 0 || pct > 100) return null;
    return pct;
  };

  const saveCommissionDefault = async () => {
    const pct = validPct(commissionDefault);
    if (pct === null) {
      toast.error('El porcentaje debe estar entre 0 y 100');
      return;
    }
    setCommissionDefaultSaving(true);
    try {
      await odooApi.setCommissionDefault(pct);
      toast.success(`Comisión global actualizada: ${pct}%`);
    } catch {
      toast.error('No se pudo guardar la comisión global');
    } finally {
      setCommissionDefaultSaving(false);
    }
  };

  const saveDoctorCommission = async (id: number) => {
    const pct = validPct(commissionInputs[id] ?? '');
    if (pct === null) {
      toast.error('El porcentaje debe estar entre 0 y 100');
      return;
    }
    setCommissionSavingId(id);
    try {
      await odooApi.setDoctorCommission(id, pct);
      setDoctors((prev) => prev.map((d) => (d.id === id ? { ...d, commission_pct: pct } : d)));
      setCommissionSavedId(id);
      setTimeout(() => setCommissionSavedId((cur) => (cur === id ? null : cur)), 2000);
    } catch {
      toast.error('No se pudo guardar la comisión del médico');
    } finally {
      setCommissionSavingId(null);
    }
  };

  return (
    <Layout title="Configuración" subtitle="Ajustes de la clínica">
      <PageHeader title="Configuración" subtitle="Información y ajustes de la clínica" />

      {/* Tabs de secciones */}
      <div className="flex flex-wrap gap-1.5 mb-6">
        {tabsVisibles.map((t) => (
          <button
            key={t.key}
            type="button"
            onClick={() => setTab(t.key)}
            className={`px-4 py-2 text-sm font-medium rounded-full transition ${
              tab === t.key ? 'bg-theme-accent text-theme-inverse' : 'bg-theme-accent-bg text-theme-heading hover:bg-theme-bg'
            }`}
          >
            {t.label}
          </button>
        ))}
      </div>

      {tab === 'usuarios' ? (
        <Card>
          <Card.Body>
            <UsuariosPanel />
          </Card.Body>
        </Card>
      ) : tab === 'roles' ? (
        <Card>
          <Card.Body>
            <RolesPanel />
          </Card.Body>
        </Card>
      ) : tab === 'recetas' ? (
        <Card>
          <Card.Body>
            <RecetasPanel />
          </Card.Body>
        </Card>
      ) : tab === 'tickets' ? (
        <TicketDesigner />
      ) : tab === 'auditoria' ? (
        <AuditoriaPanel />
      ) : tab === 'catalogos' ? (
        <Card>
          <Card.Body>
            <div className="flex flex-wrap gap-1.5 mb-4">
              {SUBCATALOGOS.map((s) => (
                <button
                  key={s.key}
                  type="button"
                  onClick={() => setSubcatalogo(s.key)}
                  className={`px-3 py-1.5 text-sm font-medium rounded-full transition ${
                    subcatalogo === s.key ? 'bg-theme-accent text-theme-inverse' : 'bg-theme-accent-bg text-theme-heading hover:bg-theme-bg'
                  }`}
                >
                  {s.label}
                </button>
              ))}
            </div>
            <CatalogoPanel kind={subcatalogo as 'diagnosticos' | 'procedimientos'} titulo={subcatalogo === 'diagnosticos' ? 'Diagnósticos' : 'Procedimientos'} />
          </Card.Body>
        </Card>
      ) : (
      <div className="grid grid-cols-1 lg:grid-cols-2 gap-4 sm:gap-6">
        <Card>
          <Card.Body>
            <h3 className="font-heading text-xl text-theme-heading mb-4">Información de la clínica</h3>
            <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
              <a
                href={`https://www.google.com/maps/search/?api=1&query=${encodeURIComponent(settings.address)}`}
                target="_blank"
                rel="noreferrer"
                className="p-4 bg-theme-bg rounded-xl flex items-start space-x-3 hover:bg-theme-bg transition"
              >
                <div className="w-10 h-10 rounded-full bg-theme-surface flex items-center justify-center text-theme-muted shadow-sm shrink-0">
                  <MapPin size={18} />
                </div>
                <div className="min-w-0">
                  <p className="text-sm font-medium text-theme-heading">Dirección</p>
                  <p className="text-sm text-theme-muted truncate">{settings.address}</p>
                </div>
              </a>

              <a
                href={`tel:${settings.phone}`}
                className="p-4 bg-theme-bg rounded-xl flex items-start space-x-3 hover:bg-theme-bg transition"
              >
                <div className="w-10 h-10 rounded-full bg-theme-surface flex items-center justify-center text-theme-muted shadow-sm shrink-0">
                  <Phone size={18} />
                </div>
                <div className="min-w-0">
                  <p className="text-sm font-medium text-theme-heading">Teléfono</p>
                  <p className="text-sm text-theme-muted truncate">{settings.phone}</p>
                </div>
              </a>

              <a
                href={`mailto:${settings.email}`}
                className="p-4 bg-theme-bg rounded-xl flex items-start space-x-3 hover:bg-theme-bg transition"
              >
                <div className="w-10 h-10 rounded-full bg-theme-surface flex items-center justify-center text-theme-muted shadow-sm shrink-0">
                  <Mail size={18} />
                </div>
                <div className="min-w-0">
                  <p className="text-sm font-medium text-theme-heading">Email</p>
                  <p className="text-sm text-theme-muted truncate">{settings.email}</p>
                </div>
              </a>

              <a
                href={settings.website}
                target="_blank"
                rel="noreferrer"
                className="p-4 bg-theme-bg rounded-xl flex items-start space-x-3 hover:bg-theme-bg transition"
              >
                <div className="w-10 h-10 rounded-full bg-theme-surface flex items-center justify-center text-theme-muted shadow-sm shrink-0">
                  <Globe size={18} />
                </div>
                <div className="min-w-0">
                  <p className="text-sm font-medium text-theme-heading">Sitio web</p>
                  <p className="text-sm text-theme-muted truncate">{settings.website.replace(/^https?:\/\//, '')}</p>
                </div>
              </a>
            </div>
          </Card.Body>
        </Card>

        <Card>
          <Card.Body>
            <h3 className="font-heading text-xl text-theme-heading mb-4 flex items-center">
              <Building2 size={20} className="mr-2" />
              Ajustes
            </h3>
            {loading ? (
              <p className="text-sm text-theme-muted">Cargando...</p>
            ) : (
              <div className="space-y-4">
                <Input
                  label="Nombre de la clínica"
                  value={settings.name}
                  onChange={(e) => update('name', e.target.value)}
                />
                <Input
                  label="Teléfono"
                  value={settings.phone}
                  onChange={(e) => update('phone', e.target.value)}
                />
                <Input
                  label="Email"
                  type="email"
                  value={settings.email}
                  onChange={(e) => update('email', e.target.value)}
                />
                <Input
                  label="Dirección"
                  value={settings.address}
                  onChange={(e) => update('address', e.target.value)}
                />
                <Input
                  label="Sitio web"
                  value={settings.website}
                  onChange={(e) => update('website', e.target.value)}
                />
                <div className="pt-2">
                  <Button onClick={save}>
                    <Save size={16} className="mr-2" />
                    Guardar ajustes
                  </Button>
                </div>
              </div>
            )}
          </Card.Body>
        </Card>

        {/* Identidad de la clínica (white-label): nombre, pie y logos que ve
            el usuario en login, menú lateral, impresos y títulos. Solo admin. */}
        {esAdmin && (
        <Card>
          <Card.Body>
            <h3 className="font-heading text-xl text-theme-heading mb-1">Identidad de la clínica</h3>
            <p className="text-sm text-theme-muted mb-4">
              Nombre, pie de página y logos que aparecen en el inicio de sesión, el menú y los
              documentos impresos. Dejar un campo vacío vuelve al valor por omisión.
            </p>
            <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
              <Input
                label="Nombre comercial"
                value={brandForm.nombre}
                onChange={(e) => setBrandForm((f) => ({ ...f, nombre: e.target.value }))}
                placeholder={BRAND_DEFAULT.nombre}
              />
              <Input
                label="Pie de página (login / documentos)"
                value={brandForm.pie}
                onChange={(e) => setBrandForm((f) => ({ ...f, pie: e.target.value }))}
                placeholder={BRAND_DEFAULT.pie}
              />
              <Input
                label="Logo fondo oscuro (ruta o URL)"
                value={brandForm.logo_claro}
                onChange={(e) => setBrandForm((f) => ({ ...f, logo_claro: e.target.value }))}
                placeholder={BRAND_DEFAULT.logo_claro}
              />
              <Input
                label="Logo fondo claro (ruta o URL)"
                value={brandForm.logo_oscuro}
                onChange={(e) => setBrandForm((f) => ({ ...f, logo_oscuro: e.target.value }))}
                placeholder={BRAND_DEFAULT.logo_oscuro}
              />
            </div>
            <div className="flex items-center gap-3 mt-4">
              {(brandForm.logo_claro || brandForm.logo_oscuro) && (
                <div className="flex items-center gap-2">
                  {brandForm.logo_claro && (
                    <span className="inline-flex items-center justify-center w-24 h-10 rounded-lg bg-[#1A1A1A] border border-theme-border">
                      <img src={brandForm.logo_claro} alt="logo oscuro" className="max-h-7 max-w-[88px] object-contain" />
                    </span>
                  )}
                  {brandForm.logo_oscuro && (
                    <span className="inline-flex items-center justify-center w-24 h-10 rounded-lg bg-white border border-theme-border">
                      <img src={brandForm.logo_oscuro} alt="logo claro" className="max-h-7 max-w-[88px] object-contain" />
                    </span>
                  )}
                </div>
              )}
              <Button onClick={saveBrand} loading={brandSaving}>
                Guardar identidad
              </Button>
            </div>
          </Card.Body>
        </Card>
        )}

        <Card className="lg:col-span-2">
          <Card.Body>
            <h3 className="font-heading text-xl text-theme-heading mb-1 flex items-center">
              <ArrowRightLeft size={20} className="mr-2" />
              Tipo de cambio USD / MXN
            </h3>
            <p className="text-sm text-theme-muted mb-4">
              Se usa para convertir ventas en dólares. Vigente:
              {tcCurrent ? (
                <span className="font-semibold text-theme-heading"> {Number(tcCurrent.rate).toFixed(2)} MXN por 1 USD <span className="font-normal text-theme-muted">({tcCurrent.date})</span></span>
              ) : (
                <span className="text-theme-muted"> sin definir</span>
              )}
            </p>
            <div className="flex flex-col sm:flex-row items-start sm:items-end gap-3 max-w-md">
              <div className="flex-1 w-full">
                <Input
                  label="Nuevo tipo de cambio (MXN por 1 USD)"
                  type="number"
                  step="0.01"
                  min="0"
                  value={tcInput}
                  onChange={(e) => setTcInput(e.target.value)}
                  placeholder="17.25"
                />
              </div>
              <Button onClick={saveTc} disabled={tcSaving}>
                <Save size={16} className="mr-2" />
                {tcSaving ? 'Guardando...' : 'Actualizar TC'}
              </Button>
            </div>
          </Card.Body>
        </Card>

        <Card className="lg:col-span-2">
          <Card.Body>
            <h3 className="font-heading text-xl text-theme-heading mb-1 flex items-center">
              <Percent size={20} className="mr-2" />
              Comisiones
            </h3>
            <p className="text-sm text-theme-muted mb-4">
              Porcentaje de comisión sobre las ventas atribuidas a cada médico (visible en su página "Mis ventas").
            </p>
            <div className="mb-5 p-4 bg-theme-bg rounded-xl flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
              <div>
                <p className="text-sm font-medium text-theme-heading">¿Cuánto costaría esta configuración?</p>
                <p className="text-xs text-theme-muted">
                  Simula la comisión de cada médico con las ventas atribuidas reales de un mes, sin guardar nada.
                </p>
              </div>
              <Button variant="outline" onClick={() => setImpactoOpen(true)}>
                <Calculator size={16} className="mr-2" />
                Ver efecto
              </Button>
            </div>
            <div className="flex flex-col sm:flex-row items-start sm:items-end gap-3 max-w-md mb-6">
              <div className="flex-1 w-full">
                <Input
                  label="% global por defecto"
                  type="number"
                  step="0.5"
                  min="0"
                  max="100"
                  value={commissionDefault}
                  onChange={(e) => setCommissionDefault(e.target.value)}
                  placeholder="0"
                />
                <p className="text-xs text-theme-muted mt-1">Se aplica a médicos sin porcentaje propio (con 0%).</p>
              </div>
              <Button onClick={saveCommissionDefault} disabled={commissionDefaultSaving}>
                <Save size={16} className="mr-2" />
                {commissionDefaultSaving ? 'Guardando...' : 'Guardar'}
              </Button>
            </div>
            <div className="overflow-x-auto">
              <table className="w-full">
                <thead className="bg-theme-bg">
                  <tr>
                    <th className="text-left p-3 text-xs font-medium text-theme-muted uppercase">Médico</th>
                    <th className="text-left p-3 text-xs font-medium text-theme-muted uppercase">Tipo</th>
                    <th className="text-left p-3 text-xs font-medium text-theme-muted uppercase">% actual</th>
                    <th className="text-left p-3 text-xs font-medium text-theme-muted uppercase w-40">Nuevo %</th>
                    <th className="text-left p-3 text-xs font-medium text-theme-muted uppercase w-32">Acción</th>
                  </tr>
                </thead>
                <tbody className="divide-y">
                  {doctors.map((d) => (
                    <tr key={d.id} className="hover:bg-theme-bg">
                      <td className="p-3 text-sm font-medium text-theme-heading">{d.name}</td>
                      <td className="p-3 text-sm text-theme-muted">
                        {(d.staff_type ?? 'doctor') === 'cosmetologa' ? 'Cosmetóloga' : 'Doctor'}
                      </td>
                      <td className="p-3 text-sm text-theme-muted">
                        {d.commission_pct ? `${d.commission_pct}%` : '0% (usa el global)'}
                      </td>
                      <td className="p-3">
                        <Input
                          type="number"
                          step="0.5"
                          min="0"
                          max="100"
                          value={commissionInputs[d.id] ?? ''}
                          onChange={(e) => setCommissionInputs((prev) => ({ ...prev, [d.id]: e.target.value }))}
                        />
                      </td>
                      <td className="p-3">
                        {commissionSavedId === d.id ? (
                          <span className="inline-flex items-center text-sm text-emerald-600">
                            <Check size={16} className="mr-1" /> Guardado
                          </span>
                        ) : (
                          <Button
                            size="sm"
                            variant="outline"
                            onClick={() => saveDoctorCommission(d.id)}
                            disabled={commissionSavingId === d.id}
                          >
                            {commissionSavingId === d.id ? 'Guardando...' : 'Guardar'}
                          </Button>
                        )}
                      </td>
                    </tr>
                  ))}
                  {doctors.length === 0 && (
                    <tr>
                      <td colSpan={5} className="p-4 text-sm text-theme-muted text-center">No hay médicos dados de alta.</td>
                    </tr>
                  )}
                </tbody>
              </table>
            </div>
          </Card.Body>
        </Card>
      </div>
      )}

      <ImpactoModal
        isOpen={impactoOpen}
        onClose={() => setImpactoOpen(false)}
        comisionGlobal={parseFloat(commissionDefault) || 0}
      />
    </Layout>
  );
};

export default Configuracion;