import { DEFAULT_MARKET_TYPES } from './market-catalog';

/** 第一版仅足球；字段预留其他 sportType */
export const SPORT_TYPE_FOOTBALL = 'FOOTBALL';

/** 常规赛事发布时生成的赛前盘口（手动维护，不含冠军盘） */
export const STANDARD_PREMATCH_MARKET_TYPES = DEFAULT_MARKET_TYPES;

export const HANDICAP_TOTAL_MARKET_TYPES = [
  'FT_HANDICAP',
  'HT_HANDICAP',
  'FT_OVER_UNDER',
  'HT_OVER_UNDER',
  'FT_TEAM_TOTAL_HOME',
  'FT_TEAM_TOTAL_AWAY',
  'FT_CORNERS_HANDICAP',
  'FT_CORNERS_OVER_UNDER',
  'FT_CARDS_OVER_UNDER',
] as const;

export type ParlayRejectReason = 'OUTRIGHT' | 'NOT_ALLOWED' | 'QUARTER_LINE';

export function isQuarterLine(line: number | null | undefined): boolean {
  if (line == null || Number.isNaN(line)) return false;
  const frac = Math.abs(line % 1);
  return Math.abs(frac - 0.25) < 0.001 || Math.abs(frac - 0.75) < 0.001;
}

export function isQuarterHandicapOrTotal(line: number | null | undefined): boolean {
  return isQuarterLine(line);
}

export function canSelectForParlay(params: {
  marketType: string;
  lineValue?: number | null;
  allowParlay?: boolean;
  isOutright?: boolean;
}): { ok: true } | { ok: false; reason: ParlayRejectReason } {
  if (params.marketType === 'OUTRIGHT_WINNER' || params.isOutright) {
    return { ok: false, reason: 'OUTRIGHT' };
  }
  if (params.allowParlay === false) {
    return { ok: false, reason: 'NOT_ALLOWED' };
  }
  if (
    (HANDICAP_TOTAL_MARKET_TYPES as readonly string[]).includes(params.marketType) &&
    isQuarterHandicapOrTotal(params.lineValue ?? null)
  ) {
    return { ok: false, reason: 'QUARTER_LINE' };
  }
  return { ok: true };
}

export function isPreMatchKickoff(startTime: Date | string): boolean {
  return new Date() < new Date(startTime);
}

export function isSupportedSport(sportType: string | null | undefined): boolean {
  return (sportType ?? SPORT_TYPE_FOOTBALL) === SPORT_TYPE_FOOTBALL;
}