import {
  readSessionExpiryEnabled,
  SESSION_EXPIRY_STORAGE_KEY,
  writeSessionExpiryEnabled,
} from "../core/session";

export type ShellTheme = "light" | "dark";

export type ShellTranslator = (
  key: string,
  fallback: string,
  vars?: Record<string, string | number>,
) => string;

type ShellSessionStatusParams = {
  expiresAtSec?: number | null;
  nowMs: number;
  t: ShellTranslator;
};

type ShellProfileSummaryParams = {
  profileName?: string | null;
  profileEmail?: string | null;
  fallbackName: string;
  fallbackEmail: string;
};

export const SHELL_THEME_STORAGE_KEY = "admin_theme";
export const SHELL_SESSION_EXPIRY_STORAGE_KEY = SESSION_EXPIRY_STORAGE_KEY;
export const SHELL_SIDEBAR_COLLAPSED_STORAGE_KEY =
  "baron_shell_sidebar_collapsed";
export type { ShellSidebarNavItem } from "./AppSidebar";
export { AppSidebar } from "./AppSidebar";
export { shellLayoutClasses } from "./layout";

export function readShellTheme(): ShellTheme {
  return window.localStorage.getItem(SHELL_THEME_STORAGE_KEY) === "dark"
    ? "dark"
    : "light";
}

export function applyShellTheme(theme: ShellTheme) {
  const root = document.documentElement;
  root.classList.remove("light", "dark");
  root.classList.add(theme);
  window.localStorage.setItem(SHELL_THEME_STORAGE_KEY, theme);
}

export function readShellSessionExpiryEnabled(defaultEnabled = true) {
  return readSessionExpiryEnabled({ defaultEnabled });
}

export function writeShellSessionExpiryEnabled(isEnabled: boolean) {
  writeSessionExpiryEnabled(isEnabled);
}

export function readShellSidebarCollapsed(defaultCollapsed = false) {
  const stored = window.localStorage.getItem(
    SHELL_SIDEBAR_COLLAPSED_STORAGE_KEY,
  );

  if (stored === null) {
    return defaultCollapsed;
  }

  return stored === "true";
}

export function writeShellSidebarCollapsed(isCollapsed: boolean) {
  window.localStorage.setItem(
    SHELL_SIDEBAR_COLLAPSED_STORAGE_KEY,
    String(isCollapsed),
  );
}

export function buildShellProfileSummary({
  profileName,
  profileEmail,
  fallbackName,
  fallbackEmail,
}: ShellProfileSummaryParams) {
  const resolvedName = profileName?.trim() || fallbackName;
  const resolvedEmail = profileEmail?.trim() || fallbackEmail;

  return {
    name: resolvedName,
    email: resolvedEmail,
    initial: resolvedName.charAt(0).toUpperCase(),
  };
}

export function buildShellSessionStatus({
  expiresAtSec,
  nowMs,
  t,
}: ShellSessionStatusParams) {
  const remainingMs =
    typeof expiresAtSec === "number" ? expiresAtSec * 1000 - nowMs : null;
  const remainingTotalSec =
    remainingMs !== null ? Math.max(0, Math.floor(remainingMs / 1000)) : null;
  const remainingMinutes =
    remainingTotalSec !== null ? Math.floor(remainingTotalSec / 60) : null;
  const remainingSeconds =
    remainingTotalSec !== null ? remainingTotalSec % 60 : null;

  let toneClass =
    "border-emerald-500/30 bg-emerald-500/10 text-emerald-700 dark:text-emerald-300";
  let text = t("ui.shell.session.active", "세션 활성");

  if (remainingMs === null) {
    toneClass = "border-border bg-card text-muted-foreground";
    text = t("ui.shell.session.unknown", "알 수 없음");
  } else if (remainingMs <= 0) {
    toneClass =
      "border-rose-500/30 bg-rose-500/10 text-rose-700 dark:text-rose-300";
    text = t("ui.shell.session.expired", "세션 만료");
  } else if (
    remainingMinutes !== null &&
    remainingSeconds !== null &&
    remainingMinutes <= 5
  ) {
    toneClass =
      "border-amber-500/30 bg-amber-500/10 text-amber-700 dark:text-amber-300";
    text = t(
      "ui.shell.session.expiring",
      "만료 임박: {{minutes}}분 {{seconds}}초 남음",
      {
        minutes: remainingMinutes,
        seconds: remainingSeconds,
      },
    );
  } else {
    text = t(
      "ui.shell.session.remaining",
      "만료 예정: {{minutes}}분 {{seconds}}초 남음",
      {
        minutes: remainingMinutes ?? 0,
        seconds: remainingSeconds ?? 0,
      },
    );
  }

  return {
    toneClass,
    text,
  };
}