HealthLog/src/components/settings/modules-section.tsx

"use client";

/**
 * `<ModulesSection>` — Settings → Module ("Was du trackst") hub. v1.18.0.
 *
 * The one place a user decides which secondary domains HealthLog surfaces.
 * Each toggleable module (mood, sleep, glucose, workouts, recovery, labs,
 * achievements, coach, insights, doctor report, cycle) gets a row with an
 * icon, label, one-line description, and a `<Switch>`. Flipping a switch
 * PATCHes `/api/auth/me/modules` (a DISABLED allowlist; the endpoint refuses
 * core keys) and then invalidates the `authMe()` query so the nav, Insights
 * pills, and dashboard tiles re-gate live off `useAuth().user.modules`.
 *
 * The three CORE domains (weight, blood pressure, pulse) render as a
 * separate read-only "always on" group — locked switches with a short note —
 * so the always-on measurement engine reads as deliberately fixed, never
 * disableable. Palette stays neutral throughout; this is a calm
 * configuration surface, not an alarm panel. (v1.18.1 D3 — medications
 * graduated to the toggleable group above.)
 *
 * State source is `useAuth().user.modules` (the resolved `/auth/me` map).
 * A module is enabled unless its key is explicitly `false` — default-on.
 */

import { useMutation, useQueryClient } from "@tanstack/react-query";
import { toast } from "sonner";
import {
  Activity,
  Award,
  Blocks,
  CalendarHeart,
  Droplet,
  Dumbbell,
  FileText,
  MessageCircleHeart,
  Moon,
  Plug,
  Pill,
  Smile,
  Sparkles,
  TestTube,
  Thermometer,
  type LucideIcon,
} from "lucide-react";

import { SettingsCard } from "@/components/settings/settings-card";
import { SettingsCardHeader } from "@/components/settings/_card-header";
import { ModuleToggleRow } from "@/components/settings/module-toggle-row";
import { useAuth } from "@/hooks/use-auth";
import { useTranslations } from "@/lib/i18n/context";
import { apiPatch } from "@/lib/api/api-fetch";
import { queryKeys } from "@/lib/query-keys";
import {
  MODULE_REGISTRY,
  moduleDelegatesTo,
  type ModuleKey,
} from "@/lib/modules/registry";

/** Neutral Lucide glyph per toggleable module. */
const MODULE_ICONS: Record<ModuleKey, LucideIcon> = {
  cycle: CalendarHeart,
  mood: Smile,
  sleep: Moon,
  glucose: Droplet,
  workouts: Dumbbell,
  recovery: Activity,
  labs: TestTube,
  illness: Thermometer,
  achievements: Award,
  coach: MessageCircleHeart,
  insights: Sparkles,
  // v1.18.1 (D3) — medications graduated from CORE to a toggleable module.
  medications: Pill,
  doctorReport: FileText,
  // v1.22.0 — the remote MCP endpoint (opt-in connectivity module).
  mcp: Plug,
};

export function ModulesSection() {
  const { t } = useTranslations();
  const { user } = useAuth();
  const queryClient = useQueryClient();

  const modules = user?.modules ?? {};
  const moduleAvailability = user?.moduleAvailability ?? {};

  const toggle = useMutation({
    // Factory-routed; the in-repo eslint rule forbids a bare literal here.
    mutationKey: queryKeys.modulesPrefs(),
    mutationFn: async (vars: { key: ModuleKey; enabled: boolean }) => {
      // DISABLED allowlist: send only the single key the user flipped.
      // Delegated keys (cycle/coach) never reach here — they render as
      // read-only deep-link rows, so the PATCH only ever carries a
      // directly-owned key.
      return apiPatch("/api/auth/me/modules", { [vars.key]: vars.enabled });
    },
    onSuccess: () => {
      // Re-gate every surface that reads the module map off /auth/me: nav,
      // Insights pills, dashboard tiles, quick-add, search.
      void queryClient.invalidateQueries({ queryKey: queryKeys.authMe() });
      toast.success(t("settings.sections.modules.saved"));
    },
    onError: () => {
      toast.error(t("settings.sections.modules.error"));
    },
  });

  // v1.18.6 (W9) — the visible heading + subtitle now come from the shared
  // `<SettingsSectionFrame>` (the former muted-`<p>` intro folded into the
  // frame's standard subtitle). The "Module immer aktiv" core-domains card
  // was removed: a domain that can't be turned off doesn't need to be listed.
  return (
    <SettingsCard>
      <SettingsCardHeader
        icon={Blocks}
        title={t("settings.sections.modules.toggleable.title")}
        className="mb-2"
      />
      {/* v1.18.6 — restore the one-line "what this section does" hint. */}
      <p className="text-muted-foreground mb-3 pl-7 text-sm leading-relaxed">
        {t("settings.sections.modules.toggleable.description")}
      </p>
      <div className="divide-border divide-y pl-7">
        {(Object.keys(MODULE_REGISTRY) as ModuleKey[]).map((key) => {
          const def = MODULE_REGISTRY[key];
          // Default-on: a module is enabled unless explicitly `false`.
          const enabled = modules[key] !== false;
          // Delegated modules (cycle/coach) are owned elsewhere — never a
          // live toggle here; deep-link to their real control instead.
          const delegated = moduleDelegatesTo(key) !== undefined;
          // Operator turned this module off server-wide: no per-user
          // toggle can re-enable it, so show a read-only note. Delegated
          // rows already deep-link, so this only matters for owned keys.
          const operatorDisabled =
            !delegated && moduleAvailability[key] === false;
          return (
            <ModuleToggleRow
              key={key}
              moduleKey={key}
              icon={MODULE_ICONS[key]}
              label={t(def.labelKey)}
              description={t(def.descriptionKey)}
              enabled={enabled}
              pending={toggle.isPending}
              managedAt={
                delegated && def.managedAt
                  ? {
                      href: def.managedAt.href,
                      label: t(def.managedAt.labelKey),
                    }
                  : undefined
              }
              manageLinkLabel={
                delegated && def.managedAt
                  ? t("settings.sections.modules.manageIn", {
                      section: t(def.managedAt.labelKey),
                    })
                  : undefined
              }
              operatorDisabled={operatorDisabled}
              operatorNote={t("settings.sections.modules.operatorDisabled")}
              onToggle={(next) => toggle.mutate({ key, enabled: next })}
            />
          );
        })}
      </div>
    </SettingsCard>
  );
}