/**
 * 추세검색 앱 설정 (gc_app_settings.trend_search_settings_json)
 */
import type { TrendSearchRequest } from './backendApi';
import { DEFAULT_TREND_SEARCH_REQUEST } from './backendApi';
import {
  BULLISH_WEIGHT_ITEMS,
  DEFAULT_BULLISH_WEIGHTS,
  type BullishWeightKey,
} from './trendSearchBullishWeights';

/** 결과 목록 표시: chart | summary(신호) */
export type TrendSearchDisplayMode = 'chart' | 'summary';

export interface TrendSearchAppSettings {
  /** 결과 UI 표시 모드 (기본 summary) */
  displayMode?: TrendSearchDisplayMode;
  weightMaAlignment: number;
  weightMaSlope: number;
  weightAdxTrend: number;
  weightMacdMomentum: number;
  weightPricePosition: number;
  minTrendScore: number;
  /** 결과 목록 최대 개수 */
  limit: number;
  /** 스캔 대상 종목 수 (거래대금 상위) */
  scanLimit: number;
  /** 자동 갱신 ON (백엔드 스케줄러·화면 폴링) */
  autoRefreshEnabled: boolean;
  /** 자동 갱신 간격(초) */
  autoRefreshSeconds: number;
  /** 검색 후 상위 N위까지 투자대상 자동추가 */
  autoAddTargetsEnabled: boolean;
  autoAddTopRank: number;
  /** 자동추가 시 추세점수(matchRate) 하한 */
  autoAddMinScore: number;
}

export const DEFAULT_TREND_SEARCH_APP_SETTINGS: TrendSearchAppSettings = {
  displayMode: 'summary',
  weightMaAlignment: DEFAULT_BULLISH_WEIGHTS.weightMaAlignment,
  weightMaSlope: DEFAULT_BULLISH_WEIGHTS.weightMaSlope,
  weightAdxTrend: DEFAULT_BULLISH_WEIGHTS.weightAdxTrend,
  weightMacdMomentum: DEFAULT_BULLISH_WEIGHTS.weightMacdMomentum,
  weightPricePosition: DEFAULT_BULLISH_WEIGHTS.weightPricePosition,
  minTrendScore: DEFAULT_TREND_SEARCH_REQUEST.minTrendScore,
  limit: DEFAULT_TREND_SEARCH_REQUEST.limit,
  scanLimit: DEFAULT_TREND_SEARCH_REQUEST.scanLimit,
  autoRefreshEnabled: true,
  autoRefreshSeconds: 3,
  autoAddTargetsEnabled: false,
  autoAddTopRank: 5,
  autoAddMinScore: DEFAULT_TREND_SEARCH_REQUEST.minTrendScore,
};

/** 자동 갱신 간격 선택지 (초) */
export const TREND_SEARCH_REFRESH_OPTIONS = [3, 5, 10, 30, 60] as const;

export function resolveTrendSearchAppSettings(
  raw?: Partial<TrendSearchAppSettings> | null,
): TrendSearchAppSettings {
  const d = DEFAULT_TREND_SEARCH_APP_SETTINGS;
  if (!raw || typeof raw !== 'object') return { ...d };
  const sec = Number(raw.autoRefreshSeconds);
  const rank = Number(raw.autoAddTopRank);
  const limit = Number(raw.limit);
  const scanLimit = Number(raw.scanLimit);
  const displayMode = raw.displayMode === 'chart' || raw.displayMode === 'summary'
    ? raw.displayMode
    : d.displayMode ?? 'summary';
  return {
    displayMode,
    weightMaAlignment: clampWeight(raw.weightMaAlignment, d.weightMaAlignment),
    weightMaSlope: clampWeight(raw.weightMaSlope, d.weightMaSlope),
    weightAdxTrend: clampWeight(raw.weightAdxTrend, d.weightAdxTrend),
    weightMacdMomentum: clampWeight(raw.weightMacdMomentum, d.weightMacdMomentum),
    weightPricePosition: clampWeight(raw.weightPricePosition, d.weightPricePosition),
    minTrendScore: clampInt(raw.minTrendScore, 0, 100, d.minTrendScore),
    limit: clampInt(limit, 5, 50, d.limit),
    scanLimit: clampInt(scanLimit, 20, 120, d.scanLimit),
    autoRefreshEnabled: raw.autoRefreshEnabled !== false,
    autoRefreshSeconds: TREND_SEARCH_REFRESH_OPTIONS.includes(sec as typeof TREND_SEARCH_REFRESH_OPTIONS[number])
      ? sec
      : d.autoRefreshSeconds,
    autoAddTargetsEnabled: raw.autoAddTargetsEnabled === true,
    autoAddTopRank: clampInt(rank, 1, 50, d.autoAddTopRank),
    autoAddMinScore: clampInt(raw.autoAddMinScore, 0, 100, d.autoAddMinScore),
  };
}

function clampWeight(v: unknown, fallback: number): number {
  const n = Number(v);
  if (!Number.isFinite(n)) return fallback;
  return Math.max(0, Math.min(100, Math.round(n / 5) * 5));
}

function clampInt(v: unknown, min: number, max: number, fallback: number): number {
  const n = Number(v);
  if (!Number.isFinite(n)) return fallback;
  return Math.min(max, Math.max(min, Math.floor(n)));
}

export function mergeTrendSearchRequest(
  base: TrendSearchRequest,
  settings: TrendSearchAppSettings,
): TrendSearchRequest {
  return {
    ...base,
    weightMaAlignment: settings.weightMaAlignment,
    weightMaSlope: settings.weightMaSlope,
    weightAdxTrend: settings.weightAdxTrend,
    weightMacdMomentum: settings.weightMacdMomentum,
    weightPricePosition: settings.weightPricePosition,
    minTrendScore: settings.minTrendScore,
    limit: settings.limit,
    scanLimit: settings.scanLimit,
  };
}

/** 검색 요청 → 앱 설정에 반영할 필드 */
export function extractTrendSearchAppSettings(
  req: Pick<TrendSearchRequest, BullishWeightKey | 'minTrendScore' | 'limit' | 'scanLimit'>,
): Pick<
  TrendSearchAppSettings,
  BullishWeightKey | 'minTrendScore' | 'limit' | 'scanLimit'
> {
  return {
    weightMaAlignment: req.weightMaAlignment,
    weightMaSlope: req.weightMaSlope,
    weightAdxTrend: req.weightAdxTrend,
    weightMacdMomentum: req.weightMacdMomentum,
    weightPricePosition: req.weightPricePosition,
    minTrendScore: req.minTrendScore,
    limit: req.limit,
    scanLimit: req.scanLimit,
  };
}

export function formatTrendRefreshLabel(seconds: number): string {
  if (seconds < 60) return `${seconds}초`;
  return `${seconds / 60}분`;
}

/** 설정 변경 감지용 (useEffect 의존성) */
export function trendSearchSettingsSignature(s: TrendSearchAppSettings): string {
  return JSON.stringify(s);
}

/** 캐시/설정 → 추세검색 조건 패널 필드 병합 (timeframe 등 화면 전용 값 유지) */
export function mergeFiltersFromTrendSearchSettings(
  filters: TrendSearchRequest,
  settings: TrendSearchAppSettings,
): TrendSearchRequest {
  return mergeTrendSearchRequest(filters, settings);
}

/** 추세검색 조건 변경 → 저장할 전체 추세설정 */
export function mergeTrendSearchSettingsFromRequest(
  current: TrendSearchAppSettings,
  req: Pick<TrendSearchRequest, BullishWeightKey | 'minTrendScore' | 'limit' | 'scanLimit'>,
): TrendSearchAppSettings {
  return resolveTrendSearchAppSettings({
    ...current,
    ...extractTrendSearchAppSettings(req),
  });
}