/** 지표 추가 팝업 — 사용자 정의 탭 (localStorage) */

export interface IndicatorCustomTab {
  id: string;
  name: string;
  /** INDICATOR_REGISTRY type 목록 (표시 순서) */
  indicatorTypes: string[];
}

const STORAGE_KEY = 'gc-indicator-custom-tabs-v1';

function newId(): string {
  return `tab-${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 7)}`;
}

export function loadCustomTabs(): IndicatorCustomTab[] {
  try {
    const raw = localStorage.getItem(STORAGE_KEY);
    if (!raw) return [];
    const arr = JSON.parse(raw) as unknown;
    if (!Array.isArray(arr)) return [];
    return arr.filter(
      (t): t is IndicatorCustomTab =>
        t != null
        && typeof t === 'object'
        && typeof (t as IndicatorCustomTab).id === 'string'
        && typeof (t as IndicatorCustomTab).name === 'string'
        && Array.isArray((t as IndicatorCustomTab).indicatorTypes),
    );
  } catch {
    return [];
  }
}

export function saveCustomTabs(tabs: IndicatorCustomTab[]): void {
  localStorage.setItem(STORAGE_KEY, JSON.stringify(tabs));
  window.dispatchEvent(new CustomEvent('gc-indicator-custom-tabs-changed'));
}

export function createCustomTab(name: string, indicatorTypes: string[]): IndicatorCustomTab {
  const tab: IndicatorCustomTab = {
    id: newId(),
    name: name.trim(),
    indicatorTypes: [...new Set(indicatorTypes)],
  };
  const tabs = loadCustomTabs();
  tabs.push(tab);
  saveCustomTabs(tabs);
  return tab;
}

export function updateCustomTab(
  id: string,
  patch: Partial<Pick<IndicatorCustomTab, 'name' | 'indicatorTypes'>>,
): IndicatorCustomTab | null {
  const tabs = loadCustomTabs();
  const idx = tabs.findIndex(t => t.id === id);
  if (idx < 0) return null;
  const next: IndicatorCustomTab = {
    ...tabs[idx],
    ...patch,
    name: patch.name != null ? patch.name.trim() : tabs[idx].name,
    indicatorTypes: patch.indicatorTypes != null
      ? [...new Set(patch.indicatorTypes)]
      : tabs[idx].indicatorTypes,
  };
  tabs[idx] = next;
  saveCustomTabs(tabs);
  return next;
}

export function deleteCustomTab(id: string): void {
  saveCustomTabs(loadCustomTabs().filter(t => t.id !== id));
}