import { parseScreenPaneHabit, type ScreenPaneHabit } from "@rakazo/core";

function screenHabitKey(userId: string | null | undefined, botId: string | null | undefined) {
  if (!userId || !botId) return null;
  return `rakazo:screen-pane:${userId}:${botId}`;
}

export function readScreenPaneHabit(
  userId: string | null | undefined,
  botId: string | null | undefined,
): ScreenPaneHabit {
  const key = screenHabitKey(userId, botId);
  if (!key) return 0;
  try {
    return parseScreenPaneHabit(window.localStorage.getItem(key));
  } catch {
    return 0;
  }
}

export function writeScreenPaneHabit(
  userId: string | null | undefined,
  botId: string | null | undefined,
  habit: ScreenPaneHabit,
): void {
  const key = screenHabitKey(userId, botId);
  if (!key) return;
  try {
    if (habit === 0) window.localStorage.removeItem(key);
    else window.localStorage.setItem(key, String(habit));
  } catch {
    // Private mode or a full quota only loses the learned default.
  }
}

export function readPaneWidth(storageKey: string, fallback: number, min: number, max: number) {
  try {
    const stored = Number(window.localStorage.getItem(storageKey));
    if (Number.isFinite(stored) && stored > 0) return Math.max(min, Math.min(max, stored));
  } catch {
    // Fall through to the default width.
  }
  return fallback;
}

export function writePaneWidth(storageKey: string, width: number): void {
  try {
    window.localStorage.setItem(storageKey, String(Math.round(width)));
  } catch {
    // The width still applies for this session.
  }
}