/**
 * @file PushIngestSettings.tsx
 * @description Settings → Data → Push ingest: the bearer token that opens
 * `POST /api/hooks/ingest-batch`, for a machine this dashboard cannot reach
 * over SSH, so the machine pushes its hooks instead. Off until a token is
 * created; the token is shown once, right after it is made (only its hash is
 * stored), and can be rotated or revoked. Also shows a forwarder script for
 * the other machine — its token in a header file, never on a command line.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { useEffect, useState } from "react";
import { useTranslation } from "react-i18next";
import { AlertTriangle, Copy, KeyRound, RefreshCw, Trash2 } from "lucide-react";
import { api } from "../../lib/api";
import type { PushTokenStatus } from "../../lib/api";
import { ConfirmModal } from "../ConfirmModal";
import { SettingsSection } from "./SettingsRow";

const copyText = (text: string) => navigator.clipboard?.writeText(text).catch(() => undefined);

/** The forwarder for the pushing machine; `origin` is how it reaches this dashboard. */
function forwarder(origin: string) {
  return `#!/bin/sh
# ~/.claude/agenthub-push.sh <HookEvent> — a Claude Code hook command:
#   "command": "sh ~/.claude/agenthub-push.sh PreToolUse"
# ~/.claude/agenthub-push.header (chmod 600) holds one line:
#   Authorization: Bearer <token>
jq -c --arg t "$1" --arg s "$(hostname -s)" \\
  '{source: $s, events: [{hook_type: $t, data: .}]}' |
  curl -s -m 5 -o /dev/null -X POST "${origin}/api/hooks/ingest-batch" \\
    -H "@$HOME/.claude/agenthub-push.header" \\
    -H "Content-Type: application/json" --data-binary @-
exit 0`;
}

export function PushIngestSettings() {
  const { t } = useTranslation("settings");
  const [status, setStatus] = useState<PushTokenStatus | null>(null);
  const [token, setToken] = useState<string | null>(null);
  const [busy, setBusy] = useState(false);
  const [error, setError] = useState<string | null>(null);
  // Rotating a live token or revoking one asks first.
  const [confirm, setConfirm] = useState<"rotate" | "revoke" | null>(null);

  useEffect(() => {
    api.settings.pushToken
      .get()
      .then(setStatus)
      .catch(() => undefined);
  }, []);

  async function run(fn: () => Promise<void>) {
    setConfirm(null);
    setBusy(true);
    setError(null);
    try {
      await fn();
    } catch (err) {
      setError(err instanceof Error ? err.message : String(err));
    } finally {
      setBusy(false);
    }
  }
  const rotate = () =>
    run(async () => {
      const r = await api.settings.pushToken.rotate();
      setToken(r.token);
      setStatus({ enabled: r.enabled, env_owned: r.env_owned });
    });
  const revoke = () =>
    run(async () => {
      setStatus(await api.settings.pushToken.revoke());
      setToken(null);
    });

  const script = forwarder(window.location.origin);

  return (
    <div id="push-ingest" className="scroll-mt-24">
      <SettingsSection
        title={
          <span className="flex items-center gap-2">
            <KeyRound className="w-4 h-4 text-fg-muted" />
            {t("pushIngest.title")}
          </span>
        }
        description={t("pushIngest.description")}
      >
        <div className="space-y-3 py-2">
          <div className="flex flex-wrap items-center gap-2">
            <span
              className={`text-xs ${status?.enabled ? "text-status-success" : "text-fg-muted"}`}
            >
              {status?.enabled ? t("pushIngest.on") : t("pushIngest.off")}
            </span>
            <button
              type="button"
              className="btn-primary text-xs disabled:opacity-40"
              disabled={busy || !status || status.env_owned}
              onClick={() => (status?.enabled ? setConfirm("rotate") : void rotate())}
            >
              <RefreshCw className="w-3.5 h-3.5" />
              {status?.enabled ? t("pushIngest.rotate") : t("pushIngest.create")}
            </button>
            {status?.enabled && (
              <button
                type="button"
                className="btn-ghost text-xs text-status-danger disabled:opacity-40"
                disabled={busy || status.env_owned}
                onClick={() => setConfirm("revoke")}
              >
                <Trash2 className="w-3.5 h-3.5" />
                {t("pushIngest.revoke")}
              </button>
            )}
          </div>
          {token && (
            <div className="rounded-lg border border-status-warning/25 bg-status-warning/10 p-3 space-y-2">
              <p className="text-xs text-status-warning">{t("pushIngest.shownOnce")}</p>
              <div className="flex items-center gap-2">
                <code className="flex-1 min-w-0 break-all text-xs text-fg-primary">{token}</code>
                <button
                  type="button"
                  className="btn-ghost text-xs"
                  title={t("pushIngest.copy")}
                  onClick={() => void copyText(token)}
                >
                  <Copy className="w-3.5 h-3.5" />
                </button>
              </div>
            </div>
          )}
          {status?.env_owned && (
            <p className="text-xs text-status-warning flex items-start gap-1.5">
              <AlertTriangle className="w-3.5 h-3.5 flex-shrink-0 mt-px" />
              {t("pushIngest.envOwned")}
            </p>
          )}
          <p className="text-xs text-fg-muted">{t("pushIngest.reachHint")}</p>
          <div className="relative">
            <pre className="text-[11px] font-mono bg-surface-1 border border-border rounded-lg p-3 overflow-x-auto text-fg-secondary">
              {script}
            </pre>
            <button
              type="button"
              className="btn-ghost text-xs absolute top-1.5 right-1.5"
              title={t("pushIngest.copy")}
              onClick={() => void copyText(script)}
            >
              <Copy className="w-3.5 h-3.5" />
            </button>
          </div>
          <p className="text-xs text-fg-muted">{t("pushIngest.limits")}</p>
          {error && <p className="text-xs text-status-danger">{error}</p>}
        </div>
        <ConfirmModal
          open={confirm !== null}
          title={t(confirm === "revoke" ? "pushIngest.revokeConfirm" : "pushIngest.rotateConfirm")}
          confirmLabel={t(confirm === "revoke" ? "pushIngest.revoke" : "pushIngest.rotate")}
          cancelLabel={t("common:cancel")}
          destructive={confirm === "revoke"}
          busy={busy}
          onConfirm={() => void (confirm === "revoke" ? revoke() : rotate())}
          onCancel={() => setConfirm(null)}
        />
      </SettingsSection>
    </div>
  );
}