import type { TranslationKey } from "@/lib/i18n";

export const DASHBOARD_SECTION_SETTINGS = [
  {
    id: "warnings",
    titleKey: "settings.dashboardSections.warnings.title",
    descriptionKey: "settings.dashboardSections.warnings.description",
    defaultVisible: true,
  },
  {
    id: "weatherBrief",
    titleKey: "settings.dashboardSections.weatherBrief.title",
    descriptionKey: "settings.dashboardSections.weatherBrief.description",
    defaultVisible: true,
  },
  {
    id: "forecast",
    titleKey: "settings.dashboardSections.forecast.title",
    descriptionKey: "settings.dashboardSections.forecast.description",
    defaultVisible: true,
  },
  {
    id: "favorites",
    titleKey: "settings.dashboardSections.favorites.title",
    descriptionKey: "settings.dashboardSections.favorites.description",
    defaultVisible: true,
  },
  {
    id: "featuredStations",
    titleKey: "settings.dashboardSections.featuredStations.title",
    descriptionKey: "settings.dashboardSections.featuredStations.description",
    defaultVisible: false,
  },
] as const satisfies ReadonlyArray<{
  id: string;
  titleKey: TranslationKey;
  descriptionKey: TranslationKey;
  defaultVisible: boolean;
}>;

export type DashboardSectionId = (typeof DASHBOARD_SECTION_SETTINGS)[number]["id"];

export type DashboardSectionVisibility = Record<DashboardSectionId, boolean>;
export type DashboardSectionOrder = DashboardSectionId[];

export const DEFAULT_DASHBOARD_SECTION_ORDER = DASHBOARD_SECTION_SETTINGS.map(
  (section) => section.id,
) as DashboardSectionOrder;

export const DEFAULT_DASHBOARD_SECTION_VISIBILITY = DASHBOARD_SECTION_SETTINGS.reduce(
  (visibility, section) => ({
    ...visibility,
    [section.id]: section.defaultVisible,
  }),
  {} as DashboardSectionVisibility,
);

export function normalizeDashboardSectionVisibility(value: unknown): DashboardSectionVisibility {
  const stored = value && typeof value === "object" ? (value as Partial<Record<DashboardSectionId, unknown>>) : {};
  return DASHBOARD_SECTION_SETTINGS.reduce(
    (visibility, section) => ({
      ...visibility,
      [section.id]: typeof stored[section.id] === "boolean" ? stored[section.id] : section.defaultVisible,
    }),
    {} as DashboardSectionVisibility,
  );
}

export function normalizeDashboardSectionOrder(value: unknown): DashboardSectionOrder {
  const allowedIds = new Set<DashboardSectionId>(DASHBOARD_SECTION_SETTINGS.map((section) => section.id));
  const stored = Array.isArray(value)
    ? value.filter((sectionId): sectionId is DashboardSectionId => allowedIds.has(sectionId as DashboardSectionId))
    : [];
  return [
    ...stored,
    ...DEFAULT_DASHBOARD_SECTION_ORDER.filter((sectionId) => !stored.includes(sectionId)),
  ] as DashboardSectionOrder;
}