import { useState } from "react";
import "../support-portals/styles-detail.css";
import "../support-portals/styles-settings.css";

import { fmt, t } from "../../i18n";
import { SectionMenu, type SectionMenuItem } from "../../shared/SectionMenu";
import { EmptyState, LoadingState } from "../../shared/ui";
import { DeleteIntegrationDialog } from "./DeleteIntegrationDialog";
import { WebIntegrationBasics } from "./WebIntegrationBasics";
import { WebIntegrationHeader } from "./WebIntegrationHeader";
import { useWebIntegration } from "./useWebIntegration";
import { SiteFieldsSection } from "./site-fields/SiteFieldsSection";
import { WebIntegrationAppearance } from "./appearance/WebIntegrationAppearance";
import { PreChatSection } from "./pre-chat/PreChatSection";

type Section = "basics" | "fields" | "form" | "look" | "danger";

const sections: SectionMenuItem<Section>[] = [
  { key: "basics", label: t("portals.basics"), icon: "settings" },
  { key: "fields", label: t("settings.site_data"), icon: "code" },
  { key: "form", label: t("settings.pre_chat_form"), icon: "form" },
  { key: "look", label: t("common.appearance"), icon: "paint", divider: true },
  { key: "danger", label: t("settings.delete_connection"), icon: "trash", danger: true },
];

export function WebIntegrationPage({ integrationId, onOpenSettings, onBack }: {
  integrationId: number;
  onOpenSettings: () => void;
  onBack: () => void;
}) {
  const { integration, loading, failed, setIntegration } = useWebIntegration(integrationId);
  const [confirmingDelete, setConfirmingDelete] = useState(false);
  const [section, setSection] = useState<Section>("basics");
  const [fieldCount, setFieldCount] = useState<number>();
  const [formEnabled, setFormEnabled] = useState<boolean>();

  if (loading) return <LoadingState />;
  if (failed) return <EmptyState title={t("settings.could_not_load_integrations")} />;
  if (!integration) return <EmptyState title={t("settings.web_integration_not_found")} />;

  return (
    <section className="web-integration-page">
      <WebIntegrationHeader integration={integration} onOpenSettings={onOpenSettings} onBack={onBack} />
      <div className="portal-settings-layout">
        <SectionMenu
          items={sections.map((item) => {
            if (item.key === "fields") return { ...item, hint: { text: fmt.number(fieldCount ?? integration.config.fields?.length ?? 0) } };
            if (item.key === "form" && (formEnabled ?? integration.config.preChat?.enabled)) return { ...item, hint: { text: t("pre_chat.on") } };
            return item;
          })}
          activeKey={section}
          note={t("settings.web_changes_apply_after_save")}
          onSelect={(next) => { if (next === "danger") setConfirmingDelete(true); else setSection(next); }}
        />
        <div className="portal-settings-content">
          <div className="portal-settings-inner" hidden={section !== "basics"}>
            <div className="portal-settings-heading">
              <h3>{t("portals.basics")}</h3>
            </div>
            <WebIntegrationBasics key={integration.id} integration={integration} onSaved={setIntegration} />
          </div>
          <div hidden={section !== "fields"}>
            <SiteFieldsSection key={integration.id} integration={integration} onSaved={setIntegration} onCount={setFieldCount} />
          </div>
          <div hidden={section !== "form"}>
            <PreChatSection key={integration.id} integration={integration} onSaved={setIntegration} onEnabled={setFormEnabled} />
          </div>
          {section === "look" && <WebIntegrationAppearance key={integration.id} integration={integration} onSaved={setIntegration} />}
        </div>
      </div>
      {confirmingDelete && <DeleteIntegrationDialog integration={integration} onClose={() => setConfirmingDelete(false)} onDeleted={onBack} />}
    </section>
  );
}