/** 매매 시그널 알림 — 그리드형 n×n 레이아웃 프리셋 (TradingView 스타일) */

export type TradeNotificationGridPresetId =
  | '1x1'
  | '2x1'
  | '1x2'
  | '3x1'
  | '1x3'
  | '2x1-31'
  | '2x2'
  | '4x1'
  | '1x4'
  | '2x1-211'
  | '5x1'
  | '3x2'
  | '2x3'
  | '4x2'
  | '2x4';

export interface TradeNotificationGridPreset {
  id: TradeNotificationGridPresetId;
  /** 스크롤 목록에 적용할 열 수 */
  cols: number;
  /** 팝업 그룹 라벨 (패널 수) */
  group: number;
  /** 짧은 표기 (2×2 등) */
  label: string;
}

export const TRADE_NOTIFICATION_GRID_PRESETS: TradeNotificationGridPreset[] = [
  { id: '1x1', cols: 1, group: 1, label: '1×1' },
  { id: '2x1', cols: 2, group: 2, label: '2×1' },
  { id: '1x2', cols: 1, group: 2, label: '1×2' },
  { id: '3x1', cols: 3, group: 3, label: '3×1' },
  { id: '1x3', cols: 1, group: 3, label: '1×3' },
  { id: '2x1-31', cols: 2, group: 3, label: '2+1' },
  { id: '2x2', cols: 2, group: 4, label: '2×2' },
  { id: '4x1', cols: 4, group: 4, label: '4×1' },
  { id: '1x4', cols: 1, group: 4, label: '1×4' },
  { id: '2x1-211', cols: 2, group: 4, label: '2+2' },
  { id: '5x1', cols: 5, group: 5, label: '5×1' },
  { id: '3x2', cols: 3, group: 6, label: '3×2' },
  { id: '2x3', cols: 2, group: 6, label: '2×3' },
  { id: '4x2', cols: 4, group: 8, label: '4×2' },
  { id: '2x4', cols: 2, group: 8, label: '2×4' },
];

const PRESET_MAP = new Map(
  TRADE_NOTIFICATION_GRID_PRESETS.map(p => [p.id, p]),
);

export const DEFAULT_TRADE_NOTIFICATION_GRID_PRESET: TradeNotificationGridPresetId = '2x2';

export function getTradeNotificationGridPreset(
  id: string | undefined | null,
): TradeNotificationGridPreset {
  const preset = id ? PRESET_MAP.get(id as TradeNotificationGridPresetId) : undefined;
  return preset ?? PRESET_MAP.get(DEFAULT_TRADE_NOTIFICATION_GRID_PRESET)!;
}

export function normalizeTradeNotificationGridPreset(
  id: string | undefined | null,
): TradeNotificationGridPresetId {
  return getTradeNotificationGridPreset(id).id;
}

/** 그룹별 프리셋 (팝업 행 구성) */
export function gridPresetsByGroup(): Map<number, TradeNotificationGridPreset[]> {
  const map = new Map<number, TradeNotificationGridPreset[]>();
  for (const p of TRADE_NOTIFICATION_GRID_PRESETS) {
    const list = map.get(p.group) ?? [];
    list.push(p);
    map.set(p.group, list);
  }
  return map;
}