'use client';

import React, { useMemo, useState } from 'react';
import { usePathname, useRouter } from 'next/navigation';
import { Loader2, RefreshCw } from 'lucide-react';

type SyncModule =
  | 'metrics'
  | 'crm'
  | 'seguimiento'
  | 'ads'
  | 'social'
  | 'organico'
  | 'activos'
  | 'all';

function moduleFromPath(pathname: string): SyncModule | null {
  if (pathname.startsWith('/dashboard/agencia')) return 'all';
  if (pathname.startsWith('/dashboard/kpis')) return 'metrics';
  if (pathname.startsWith('/dashboard/crm')) return 'crm';
  if (pathname.startsWith('/dashboard/seguimiento')) return 'seguimiento';
  if (pathname.startsWith('/dashboard/ad-tracker')) return 'ads';
  if (pathname.startsWith('/dashboard/social')) return 'social';
  if (pathname.startsWith('/dashboard/organico')) return 'organico';
  if (pathname.startsWith('/dashboard/activos')) return 'activos';
  if (pathname.startsWith('/dashboard/estrategia')) return 'metrics';
  if (pathname.startsWith('/dashboard/calendario')) return 'seguimiento';
  return null;
}

const LABELS: Record<SyncModule, string> = {
  metrics: 'Sincronizar métricas',
  crm: 'Sincronizar CRM',
  seguimiento: 'Sincronizar seguimiento',
  ads: 'Sincronizar Ads',
  social: 'Actualizar Social',
  organico: 'Sincronizar orgánico',
  activos: 'Sincronizar Drive',
  all: 'Sincronizar todo',
};

export default function SyncNowButton({
  forceModule,
  className = '',
}: {
  forceModule?: SyncModule;
  className?: string;
}) {
  const pathname = usePathname() || '';
  const router = useRouter();
  const module = forceModule || moduleFromPath(pathname);
  const [busy, setBusy] = useState(false);
  const [msg, setMsg] = useState<string | null>(null);
  const [err, setErr] = useState<string | null>(null);

  const label = useMemo(
    () => (module ? LABELS[module] : 'Sincronizar'),
    [module]
  );

  if (!module) return null;

  async function run() {
    setBusy(true);
    setMsg(null);
    setErr(null);
    try {
      if (module === 'social') {
        router.refresh();
        setMsg('Social actualizado');
        setBusy(false);
        return;
      }
      const res = await fetch('/api/admin/sync', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ module, days: 14 }),
      });
      const data = await res.json().catch(() => ({}));
      if (!res.ok) {
        setErr(data.error || 'Sync falló');
        setBusy(false);
        return;
      }
      const parts: string[] = [];
      if (data.crm?.results) {
        const ok = (data.crm.results as { leads?: number; error?: string }[]).filter(
          (r) => !r.error && (r.leads || 0) >= 0
        );
        const bad = (data.crm.results as { error?: string }[]).filter((r) => r.error);
        parts.push(`CRM ${ok.length} ok` + (bad.length ? ` · ${bad.length} sin key` : ''));
      }
      if (data.ads) {
        parts.push(
          data.ads.ok === false
            ? `Ads error`
            : `Ads ${data.ads.synced || 0} tenants`
        );
      }
      if (data.organico) {
        parts.push(
          data.organico.ok === false ? 'Orgánico avisó' : 'Orgánico OK'
        );
      }
      if (data.seguimiento) {
        parts.push(
          data.seguimiento.ok === false ? 'Seguimiento avisó' : 'Seguimiento OK'
        );
      }
      if (data.activos) {
        parts.push(
          data.activos.ok === false
            ? 'Drive avisó'
            : `Drive ${data.activos.linked ?? data.activos.matched ?? 0}`
        );
      }
      setMsg(parts.join(' · ') || 'Listo');
      router.refresh();
    } catch {
      setErr('Error de red');
    }
    setBusy(false);
  }

  return (
    <div className={`flex flex-col items-end gap-0.5 ${className}`}>
      <button
        type="button"
        disabled={busy}
        onClick={() => void run()}
        className="inline-flex items-center gap-1.5 text-xs font-semibold px-3 py-1.5 rounded-lg border border-gray-200 bg-white text-gray-800 hover:border-brand-400 hover:text-brand-700 disabled:opacity-50"
        title="Actualiza datos de esta pestaña desde las APIs (agencia)"
      >
        {busy ? (
          <Loader2 className="w-3.5 h-3.5 animate-spin" />
        ) : (
          <RefreshCw className="w-3.5 h-3.5" />
        )}
        {busy ? 'Sincronizando…' : label}
      </button>
      {msg ? (
        <span className="text-[10px] text-emerald-700 max-w-[220px] text-right">
          {msg}
        </span>
      ) : null}
      {err ? (
        <span className="text-[10px] text-red-700 max-w-[220px] text-right">
          {err}
        </span>
      ) : null}
    </div>
  );
}