"use client";

import { useCallback, useEffect, useState } from "react";
import { useCan } from "@/lib/abilities";
import {
  formatDateTime,
  NOTIFICATION_STATUS_LABELS,
  NOTIFICATION_TYPE_LABELS,
} from "@/lib/labels";
import { NotificationLogPanel } from "@/components/NotificationLogPanel";
import { AdminEmailsSetting } from "@/components/AdminEmailsSetting";
import {
  getNotificationStats,
  runAccountStatus,
  runAllNotifications,
  runOutstandingPayments,
  runPaymentConfirmation,
  runTrustConfirmation,
  SERVICIOS_LOG_SCOPE,
} from "@/lib/api";
import type {
  NotificationFlags,
  NotificationJobResponse,
  NotificationRunAllResponse,
  NotificationStats,
} from "@/lib/api";

/**
 * Mass email notifications — the "Servicios" half of /notificaciones. Manual
 * triggers for the four jobs plus a paged log browser. Gated on
 * `notification:send`; a STAFF viewer sees the read-only log table but not the
 * trigger buttons.
 */

type JobKind = "outstanding" | "payment" | "account" | "trust";

interface JobDef {
  kind: JobKind;
  title: string;
  endpoint: string;
  description: string;
  servicio: "Clientes" | "Fideicomiso";
  flagsHint?: string;
}

const JOBS: JobDef[] = [
  {
    kind: "outstanding",
    title: "Pagos pendientes",
    endpoint: "sendOutstandingPaymentAlerts",
    servicio: "Clientes",
    description:
      "Clientes con al menos un movimiento marcado como pendiente (outstanding). Equivale a la columna NOPAGO=1 del antiguo datosfreak.",
  },
  {
    kind: "payment",
    title: "Confirmación de pago",
    endpoint: "sendPaymentConfirmation",
    servicio: "Clientes",
    description:
      "Clientes con un crédito (abono) en las últimas 24 horas. Un correo por cliente con el pago más reciente.",
  },
  {
    kind: "account",
    title: "Estado de cuenta",
    endpoint: "sendAccountStatus",
    servicio: "Clientes",
    description:
      "Alerta amarilla (DEBAJO DEL TIPO) los miércoles y roja (EN ROJO) lunes/miércoles/viernes. El flag ignoreDayRestriction salta los gates.",
    flagsHint: "Solo este job respeta ignoreDayRestriction y useEmailLimit.",
  },
  {
    kind: "trust",
    title: "Confirmación fideicomiso",
    endpoint: "sendConfirmTrustPayment",
    servicio: "Fideicomiso",
    description:
      "Clientes con TrustAccount que recibieron un crédito en el dominio TRUST en las últimas 24 horas.",
  },
];

/** Job title by kind — used by the run-all summary, which only carries kinds. */
const JOB_TITLES: Record<JobKind, string> = JOBS.reduce(
  (acc, j) => ({ ...acc, [j.kind]: j.title }),
  {} as Record<JobKind, string>,
);

export function NotificacionesServicios() {
  const allowed = useCan("notification:send");

  const [flags, setFlags] = useState<NotificationFlags>({ debug: true });
  const [stats, setStats] = useState<NotificationStats | null>(null);
  /** Raised after every run so the shared log panel reloads. */
  const [logToken, setLogToken] = useState(0);
  const [busy, setBusy] = useState<JobKind | "all" | null>(null);
  const [lastResult, setLastResult] = useState<
    NotificationJobResponse | NotificationRunAllResponse | null
  >(null);
  const [error, setError] = useState<string | null>(null);

  const refresh = useCallback(async () => {
    try {
      setStats(await getNotificationStats(SERVICIOS_LOG_SCOPE));
      setLogToken((t) => t + 1);
      setError(null);
    } catch (e) {
      setError(e instanceof Error ? e.message : String(e));
    }
  }, []);

  useEffect(() => {
    void refresh();
  }, [refresh]);

  const run = useCallback(
    async (job: JobDef) => {
      if (!allowed) return;
      setBusy(job.kind);
      setError(null);
      try {
        let res: NotificationJobResponse;
        if (job.kind === "outstanding") res = await runOutstandingPayments(flags);
        else if (job.kind === "payment") res = await runPaymentConfirmation(flags);
        else if (job.kind === "account") res = await runAccountStatus(flags);
        else res = await runTrustConfirmation(flags);
        setLastResult(res);
        await refresh();
      } catch (e) {
        setError(e instanceof Error ? e.message : String(e));
      } finally {
        setBusy(null);
      }
    },
    [allowed, flags, refresh],
  );

  // "Ejecutar todos" — one POST, the API runs the four jobs sequentially with
  // the same flags. Confirmation only matters when debug is off, since that
  // is the case where real customers receive mail.
  const runAll = useCallback(async () => {
    if (!allowed) return;
    if (!flags.debug) {
      const ok = window.confirm(
        "debug está desactivado: los cuatro envíos irán a los correos reales de los clientes. ¿Ejecutar todos?",
      );
      if (!ok) return;
    }
    setBusy("all");
    setError(null);
    try {
      const res = await runAllNotifications(flags);
      setLastResult(res);
      await refresh();
    } catch (e) {
      setError(e instanceof Error ? e.message : String(e));
    } finally {
      setBusy(null);
    }
  }, [allowed, flags, refresh]);

  return (
    <div style={{ display: "grid", gap: 20 }}>
      <p className="muted" style={{ maxWidth: 760, margin: 0 }}>
        Disparo manual de los cuatro envíos equivalentes a los scripts PHP de{" "}
        <code>email.notifications/</code>. Cada ejecución registra todas las filas
        (enviado, fallido, omitido) en <code>email_notification_log</code>.
      </p>

      {!allowed && (
        <div className="empty-inline">
          Tu rol no incluye <code>notification:send</code>. Solo puedes ver el
          registro. Para disparar envíos pide a un MANAGER/ADMIN.
        </div>
      )}

      {error && <div className="state-box state-error">{error}</div>}

      <section className="card" style={{ padding: 20 }}>
        <h2 className="section-title">Flags del envío</h2>
        <div style={{ display: "grid", gap: 4, marginTop: 12 }}>
          <label
            className="field"
            style={{ display: "flex", gap: 8, alignItems: "flex-start", marginBottom: 8 }}
          >
            <input
              type="checkbox"
              checked={!!flags.debug}
              disabled={!allowed}
              onChange={(e) => setFlags((f) => ({ ...f, debug: e.target.checked }))}
              style={{ marginTop: 2 }}
            />
            <span className="small">
              <strong>debug</strong> — reescribe todos los destinatarios a{" "}
              <code>rmancinas@freakma.net</code>. Ningún cliente real recibe el
              correo mientras esté activo.
            </span>
          </label>
          <label
            className="field"
            style={{ display: "flex", gap: 8, alignItems: "flex-start", marginBottom: 8 }}
          >
            <input
              type="checkbox"
              checked={!!flags.ignoreDayRestriction}
              disabled={!allowed}
              onChange={(e) =>
                setFlags((f) => ({ ...f, ignoreDayRestriction: e.target.checked }))
              }
              style={{ marginTop: 2 }}
            />
            <span className="small">
              <strong>ignoreDayRestriction</strong> — salta los gates de
              Mon/Wed/Fri del estado de cuenta. Útil para disparar en cualquier
              día sin esperar a la próxima corrida.
            </span>
          </label>
          <label
            className="field"
            style={{ display: "flex", gap: 8, alignItems: "flex-start", marginBottom: 0 }}
          >
            <input
              type="checkbox"
              checked={!!flags.useEmailLimit}
              disabled={!allowed}
              onChange={(e) =>
                setFlags((f) => ({ ...f, useEmailLimit: e.target.checked }))
              }
              style={{ marginTop: 2 }}
            />
            <span className="small">
              <strong>useEmailLimit</strong> — pausa el estado de cuenta cada 100
              correos durante 1 hora. Vestigio de la era SMTP; SES no lo necesita.
            </span>
          </label>
        </div>

        <div
          style={{
            display: "flex",
            alignItems: "center",
            gap: 12,
            flexWrap: "wrap",
            marginTop: 16,
            paddingTop: 16,
            borderTop: "1px solid var(--line)",
          }}
        >
          <button
            type="button"
            className="btn btn-primary btn-sm"
            disabled={!allowed || busy !== null}
            onClick={() => void runAll()}
          >
            {busy === "all" ? "Ejecutando todos…" : "Ejecutar todos"}
          </button>
          <span className="muted small">
            Dispara los cuatro envíos en orden (pagos pendientes, confirmación
            de pago, estado de cuenta, fideicomiso) con estos mismos flags. Si
            uno falla, los demás continúan.
          </span>
        </div>
      </section>

      <section
        style={{
          display: "grid",
          gridTemplateColumns: "repeat(auto-fit, minmax(280px, 1fr))",
          gap: 12,
        }}
      >
        {JOBS.map((j) => (
          <article
            key={j.kind}
            className="card"
            style={{ padding: 18, display: "grid", gap: 8, alignContent: "start" }}
          >
            <header
              style={{
                display: "flex",
                justifyContent: "space-between",
                alignItems: "center",
                gap: 8,
              }}
            >
              <strong>{j.title}</strong>
              <span
                className={
                  j.servicio === "Fideicomiso"
                    ? "badge badge-fideicomiso"
                    : "badge badge-servicios"
                }
              >
                <span className="dot" />
                {j.servicio}
              </span>
            </header>
            <p className="muted small" style={{ margin: 0 }}>
              {j.description}
            </p>
            {j.flagsHint && (
              <p className="section-note" style={{ margin: 0, fontStyle: "italic" }}>
                {j.flagsHint}
              </p>
            )}
            <div className="row-actions" style={{ marginTop: 4 }}>
              <button
                type="button"
                className="btn btn-primary btn-sm"
                disabled={!allowed || busy !== null}
                onClick={() => void run(j)}
              >
                {busy === j.kind ? "Ejecutando…" : "Ejecutar"}
              </button>
            </div>
          </article>
        ))}
      </section>

      {stats && (
        <section className="card" style={{ padding: 20 }}>
          <h2 className="section-title">Estado del transporte</h2>
          <ul className="small" style={{ marginTop: 10, marginBottom: 0, paddingLeft: 18 }}>
            <li>
              SES configurado:{" "}
              <strong
                style={{
                  color: stats.transport.available
                    ? "var(--positive)"
                    : "var(--negative)",
                }}
              >
                {stats.transport.available ? "sí" : "no"}
              </strong>
              {stats.transport.devFallback && " (fallback dev: stdout)"}
            </li>
            <li>
              Último envío registrado:{" "}
              {stats.lastRun
                ? `${NOTIFICATION_TYPE_LABELS[stats.lastRun.notificationType]} — ${formatDateTime(stats.lastRun.sendDate)}`
                : "—"}
            </li>
            <li>
              Totales:{" "}
              {stats.byStatus.map((s) => (
                <span key={s.status} style={{ marginRight: 12 }}>
                  {NOTIFICATION_STATUS_LABELS[s.status]}: {s._count._all}
                </span>
              ))}
            </li>
          </ul>
        </section>
      )}

      <AdminEmailsSetting />

      {lastResult && (
        <section className="card" style={{ padding: 20 }}>
          <h2 className="section-title">Última respuesta</h2>
          {lastResult.type === "RUN_ALL" && (
            <ul
              className="small"
              style={{ marginTop: 10, marginBottom: 0, paddingLeft: 18 }}
            >
              <li>
                Totales: enviados {lastResult.sent} · omitidos{" "}
                {lastResult.skipped} · fallidos {lastResult.failed}
                {lastResult.errors > 0 && ` · jobs con error ${lastResult.errors}`}
              </li>
              {lastResult.jobs.map((j) => (
                <li key={j.kind}>
                  {JOB_TITLES[j.kind]}:{" "}
                  {j.ok && j.result ? (
                    <>
                      enviados {j.result.sent} · omitidos {j.result.skipped} ·
                      fallidos {j.result.failed}
                    </>
                  ) : (
                    <span style={{ color: "var(--negative)" }}>
                      error — {j.error}
                    </span>
                  )}
                </li>
              ))}
            </ul>
          )}
          <pre
            className="mono"
            style={{
              margin: "10px 0 0",
              fontSize: 12,
              overflow: "auto",
              background: "var(--surface-2)",
              border: "1px solid var(--line)",
              borderRadius: "var(--radius-sm)",
              padding: 12,
            }}
          >
            {JSON.stringify(lastResult, null, 2)}
          </pre>
        </section>
      )}

      <NotificationLogPanel
        servicio={SERVICIOS_LOG_SCOPE}
        reloadToken={logToken}
      />
    </div>
  );
}