/** 조건 노드별 지표 기간·임계값 — 차트 DEF 기본값 대비 노드 단위 오버라이드 */
import type { ConditionDSL } from './strategyTypes';
import {
  compositeFieldLabel,
  compositeValueField,
  getCompositeDefaultPeriods,
  getDonchianFieldOpts,
  isDonchianComposite,
  isThresholdField,
  parseDonchianPeriod,
  parsePeriodFromCompositeField,
  syncCompositeFields,
  type CompositePeriodDef,
} from './compositeIndicators';
import {
  isPriceExtremeIndicator,
  migratePriceExtremeCondition,
  parsePriorExtremePeriod,
  syncPriceExtremeSimpleFields,
} from './priceExtremeIndicators';
import {
  isThresholdFieldOrSymbol,
  isThresholdSymbol,
  inferThresholdRoleForValue,
  resolveInheritedThresholdField,
  resolveThresholdFromDef,
  THRESHOLD_HL_MID,
  THRESHOLD_HL_OVER,
  THRESHOLD_HL_UNDER,
} from './thresholdSymbols';
import { DEFAULT_START_CANDLE, normalizeStartCandleType } from './strategyStartNodes';
import {
  getIndicatorPrimaryPeriod,
  formatIndicatorPeriodLabel,
} from './strategyIndicatorPeriods';
import type { DefType } from './strategyEditorShared';

export interface IndicatorPeriodDef {
  rsiPeriod: number;
  cciPeriod: number;
  adxPeriod: number;
  williamsR: number;
  trixPeriod: number;
  vrPeriod: number;
  newPsy: number;
  psyPeriod: number;
  investPsy: number;
}

export const VALUE_FIELD_PREFIX: Record<string, string> = {
  RSI: 'RSI_VALUE',
  CCI: 'CCI_VALUE',
  ADX: 'ADX_VALUE',
  WILLIAMS_R: 'WILLIAMS_R_VALUE',
  TRIX: 'TRIX_VALUE',
  VR: 'VR_VALUE',
  PSYCHOLOGICAL: 'PSY_VALUE',
  NEW_PSYCHOLOGICAL: 'NEW_PSY_VALUE',
  INVEST_PSYCHOLOGICAL: 'INVEST_PSY_VALUE',
};

export function getDefaultIndicatorPeriod(
  indicatorType: string,
  def: IndicatorPeriodDef | DefType,
): number {
  return getIndicatorPrimaryPeriod(indicatorType, def as DefType);
}

/** @internal DefType 전체 필드 — 팔레트 라벨 등 */
export function getDefaultIndicatorPeriodLabel(
  indicatorType: string,
  def: IndicatorPeriodDef | DefType,
): string {
  return formatIndicatorPeriodLabel(indicatorType, def as DefType);
}

function parseFieldPeriod(field?: string): number | null {
  if (!field || isThresholdField(field)) return null;
  const m = field.match(/_(\d+)$/);
  if (!m) return null;
  const n = parseInt(m[1], 10);
  return Number.isFinite(n) && n > 0 ? n : null;
}

/** 조건 노드의 RSI 등 값(좌측) 기간 — true=전략 전용, false/미설정=보조지표 설정(DEF) 상속 */
export function isValuePeriodOverridden(cond: ConditionDSL): boolean {
  return cond.valuePeriodOverride === true;
}

export function isRightPeriodOverridden(cond: ConditionDSL): boolean {
  return cond.rightPeriodOverride === true;
}

export function isThresholdOverridden(cond: ConditionDSL): boolean {
  return cond.thresholdOverride === true;
}

/** 조건 노드의 RSI 등 값(좌측) 기간 */
export function getConditionValuePeriod(cond: ConditionDSL, def: IndicatorPeriodDef): number {
  if (isPriceExtremeIndicator(cond.indicatorType)) {
    if (isValuePeriodOverridden(cond)) {
      if (cond.period && cond.period > 0) return cond.period;
      const fromRight = parsePriorExtremePeriod(cond.rightField);
      if (fromRight) return fromRight;
    }
    return getDefaultIndicatorPeriod(cond.indicatorType, def);
  }
  if (cond.composite) {
    if (isValuePeriodOverridden(cond)) {
      if (cond.leftPeriod && cond.leftPeriod > 0) return cond.leftPeriod;
      const fromField = parsePeriodFromCompositeField(cond.indicatorType, cond.leftField);
      if (fromField) return fromField;
    }
    const { short } = getCompositeDefaultPeriods(cond.indicatorType, def as CompositePeriodDef);
    return short;
  }
  if (isValuePeriodOverridden(cond)) {
    if (cond.period && cond.period > 0) return cond.period;
    const fromField = parseFieldPeriod(cond.leftField);
    if (fromField) return fromField;
  }
  return getDefaultIndicatorPeriod(cond.indicatorType, def);
}

export function getConditionRightPeriod(cond: ConditionDSL, def: IndicatorPeriodDef): number {
  if (cond.composite) {
    if (isRightPeriodOverridden(cond)) {
      if (cond.rightPeriod && cond.rightPeriod > 0) return cond.rightPeriod;
      const fromField = parsePeriodFromCompositeField(cond.indicatorType, cond.rightField);
      if (fromField) return fromField;
    }
    const { long } = getCompositeDefaultPeriods(cond.indicatorType, def as CompositePeriodDef);
    return long;
  }
  if (isValuePeriodOverridden(cond)) {
    const fromField = parseFieldPeriod(cond.rightField);
    if (fromField) return fromField;
  }
  return getDefaultIndicatorPeriod(cond.indicatorType, def);
}

/** 조건대상 직접입력 — 기간(일) 또는 임계값 */
export function resolveFieldCustomKind(
  indicatorType: string,
  field: string | undefined,
): 'period' | 'threshold' | 'none' {
  if (!field) return 'none';
  if (isThresholdField(field)) return 'threshold';
  const prefix = VALUE_FIELD_PREFIX[indicatorType];
  if (prefix && (field === prefix || field.startsWith(`${prefix}_`))) return 'period';
  return 'none';
}

const INDICATORS_WITH_RIGHT_THRESHOLD_INPUT = new Set([
  'RSI', 'STOCHASTIC', 'CCI', 'ADX', 'DMI', 'WILLIAMS_R', 'TRIX',
  'PSYCHOLOGICAL', 'NEW_PSYCHOLOGICAL', 'INVEST_PSYCHOLOGICAL', 'BWI', 'VR',
  'VOLUME_OSC', 'DISPARITY',
]);

/** 조건대상2 — 임계값 직접입력 노출 여부 */
export function resolveRightFieldCustomKind(
  indicatorType: string,
  field: string | undefined,
): 'period' | 'threshold' | 'none' {
  const base = resolveFieldCustomKind(indicatorType, field);
  if (base !== 'none') return base;
  if (parseThresholdField(field) != null) return 'threshold';
  if (isThresholdFieldOrSymbol(field)) return 'threshold';
  if (INDICATORS_WITH_RIGHT_THRESHOLD_INPUT.has(indicatorType)) return 'threshold';
  return 'none';
}

export function isValuePeriodFieldStored(indicatorType: string, field?: string): boolean {
  const prefix = VALUE_FIELD_PREFIX[indicatorType];
  if (!prefix || !field) return false;
  return field.startsWith(`${prefix}_`) && field.length > prefix.length + 1;
}

export function usesValuePeriodField(cond: ConditionDSL): boolean {
  if (isPriceExtremeIndicator(cond.indicatorType)) return true;
  if (cond.composite) return true;
  const prefix = VALUE_FIELD_PREFIX[cond.indicatorType];
  if (!prefix) return false;
  const lf = cond.leftField ?? '';
  return lf === prefix || lf.startsWith(`${prefix}_`);
}

export function parseThresholdField(field?: string): number | null {
  if (!field?.startsWith('K_')) return null;
  const n = parseFloat(field.slice(2));
  return Number.isFinite(n) ? n : null;
}

export function thresholdField(value: number): string {
  return `K_${value}`;
}

export function hasEditableThreshold(cond: ConditionDSL): boolean {
  return isThresholdFieldOrSymbol(cond.rightField)
    || isThresholdFieldOrSymbol(cond.leftField)
    || parseThresholdField(cond.rightField) != null;
}

/** 보조지표 차트(DB) hline 기준값 — 전략 오버라이드와 무관하게 항상 DEF에서 조회 */
export function getChartReferenceThreshold(
  cond: ConditionDSL,
  side: 'left' | 'right',
  inheritedField: string | undefined,
  def: { hlThresh: Record<string, { over?: number; mid?: number; under?: number }> },
): number | null {
  const raw = side === 'left' ? cond.leftField : (inheritedField ?? cond.rightField);
  if (!raw) return null;
  const field = isThresholdOverridden(cond)
    ? raw
    : resolveInheritedThresholdField(raw, cond.indicatorType, def.hlThresh);
  if (!field) return null;
  return resolveThresholdFromDef(field, cond.indicatorType, def.hlThresh);
}

/**
 * 전략 평가용 임계값 — thresholdOverride=true 이면 targetValue/K_, 아니면 차트 DEF.
 */
export function getConditionThreshold(
  cond: ConditionDSL,
  side: 'left' | 'right',
  inheritedField?: string,
  def?: { hlThresh: Record<string, { over?: number; mid?: number; under?: number }> },
): number | null {
  if (isThresholdOverridden(cond) && cond.targetValue != null && Number.isFinite(cond.targetValue)) {
    return cond.targetValue;
  }
  if (!isThresholdOverridden(cond)) {
    const rawField = inheritedField ?? (side === 'left' ? cond.leftField : cond.rightField);
    const roleField = def
      ? resolveInheritedThresholdField(rawField, cond.indicatorType, def.hlThresh)
      : rawField;
    if (def && roleField) {
      const fromDef = resolveThresholdFromDef(roleField, cond.indicatorType, def.hlThresh);
      if (fromDef != null) return fromDef;
    }
    if (inheritedField && def) {
      const inheritedRole = resolveInheritedThresholdField(
        inheritedField,
        cond.indicatorType,
        def.hlThresh,
      );
      const fromInherited = resolveThresholdFromDef(
        inheritedRole,
        cond.indicatorType,
        def.hlThresh,
      );
      if (fromInherited != null) return fromInherited;
    }
  }
  const field = side === 'left' ? cond.leftField : cond.rightField;
  return parseThresholdField(field);
}

export function setConditionThreshold(
  cond: ConditionDSL,
  side: 'left' | 'right',
  value: number,
  def?: { hlThresh: Record<string, { over?: number; mid?: number; under?: number }> },
): ConditionDSL {
  const fieldKey = side === 'left' ? 'leftField' : 'rightField';
  const current = cond[fieldKey];
  if (!isThresholdFieldOrSymbol(current)) {
    if (side === 'right' && INDICATORS_WITH_RIGHT_THRESHOLD_INPUT.has(cond.indicatorType)) {
      return {
        ...cond,
        [fieldKey]: thresholdField(value),
        targetValue: value,
        thresholdOverride: true,
      };
    }
    return cond;
  }

  const inheritedField = side === 'right'
    ? (current?.startsWith('K_') || isThresholdSymbol(current) ? current : THRESHOLD_HL_OVER)
    : current;
  const chartRef = def
    ? getChartReferenceThreshold(cond, side, inheritedField, def)
    : null;

  const matchedRole = def
    ? inferThresholdRoleForValue(value, cond.indicatorType, def.hlThresh)
    : null;
  if (matchedRole != null) {
    const { targetValue: _t, ...rest } = cond;
    return { ...rest, [fieldKey]: matchedRole, thresholdOverride: false };
  }

  if (chartRef != null && Math.abs(chartRef - value) < 0.0001) {
    const role = isThresholdSymbol(inheritedField)
      ? inheritedField
      : (side === 'right' ? THRESHOLD_HL_OVER : inheritedField);
    const { targetValue: _t, ...rest } = cond;
    return { ...rest, [fieldKey]: role, thresholdOverride: false };
  }

  return {
    ...cond,
    [fieldKey]: thresholdField(value),
    targetValue: value,
    thresholdOverride: true,
  };
}

export function setConditionValuePeriod(
  cond: ConditionDSL,
  period: number,
  _def: IndicatorPeriodDef,
): ConditionDSL {
  const p = Math.max(1, Math.min(500, Math.round(period)));
  if (isPriceExtremeIndicator(cond.indicatorType)) {
    return syncPriceExtremeSimpleFields({ ...cond, period: p, valuePeriodOverride: true });
  }
  if (cond.composite) {
    return syncCompositeFields({ ...cond, composite: true, leftPeriod: p, valuePeriodOverride: true });
  }
  const prefix = VALUE_FIELD_PREFIX[cond.indicatorType];
  const next: ConditionDSL = { ...cond, period: p, valuePeriodOverride: true };
  if (prefix && (cond.leftField === prefix || cond.leftField?.startsWith(`${prefix}_`))) {
    next.leftField = `${prefix}_${p}`;
  }
  return next;
}

export function setConditionRightPeriod(cond: ConditionDSL, period: number): ConditionDSL {
  const p = Math.max(1, Math.min(500, Math.round(period)));
  if (!cond.composite) return cond;
  return syncCompositeFields({ ...cond, composite: true, rightPeriod: p, rightPeriodOverride: true });
}


/** 신규 조건 노드 — 보조지표 설정 기본값 상속(오버라이드 없음) */
export function initConditionPeriodsInherit(
  indicatorType: string,
  condition: ConditionDSL,
  def: IndicatorPeriodDef,
): ConditionDSL {
  const base = {
    ...condition,
    valuePeriodOverride: false as const,
    thresholdOverride: false as const,
    rightPeriodOverride: false as const,
  };
  if (isPriceExtremeIndicator(indicatorType)) {
    const period = getDefaultIndicatorPeriod(indicatorType, def);
    return syncPriceExtremeSimpleFields({ ...base, period });
  }
  if (condition.composite) return base;
  const prefix = VALUE_FIELD_PREFIX[indicatorType];
  if (!prefix) {
    const { period: _p, ...rest } = base;
    return rest;
  }
  const lf = condition.leftField ?? '';
  if (lf === prefix || lf.startsWith(`${prefix}_`)) {
    const { period: _p, ...rest } = base;
    return { ...rest, leftField: prefix };
  }
  const { period: _p, ...rest } = base;
  return rest;
}

export function initConditionPeriods(
  indicatorType: string,
  condition: ConditionDSL,
  def: IndicatorPeriodDef,
): ConditionDSL {
  if (isPriceExtremeIndicator(indicatorType)) {
    const period = condition.period ?? getDefaultIndicatorPeriod(indicatorType, def);
    return syncPriceExtremeSimpleFields({ ...condition, period });
  }
  if (condition.composite) return condition;
  const prefix = VALUE_FIELD_PREFIX[indicatorType];
  if (!prefix) return condition;
  const period = getDefaultIndicatorPeriod(indicatorType, def);
  const lf = condition.leftField ?? '';
  if (lf === prefix || lf.startsWith(`${prefix}_`)) {
    return { ...condition, period: condition.period ?? period, leftField: `${prefix}_${condition.period ?? period}` };
  }
  return { ...condition, period: condition.period ?? period };
}

export function hasNodeSettings(cond: ConditionDSL): boolean {
  return usesValuePeriodField(cond)
    || hasEditableThreshold(cond)
    || !!cond.composite;
}

const COMMON_PERIODS = [5, 7, 9, 10, 12, 13, 14, 20, 21, 26, 28, 50, 60, 120];

export function getPeriodPresetOptions(indicatorType: string, def: IndicatorPeriodDef): number[] {
  const base = getDefaultIndicatorPeriod(indicatorType, def);
  if (isPriceExtremeIndicator(indicatorType)) {
    return [...new Set([base, 5, 9, 10, 20, 55, ...COMMON_PERIODS])].sort((a, b) => a - b);
  }
  return [...new Set([base, ...COMMON_PERIODS])].sort((a, b) => a - b);
}

export function getPeriodSettingsLabel(cond: ConditionDSL): string | null {
  if (isPriceExtremeIndicator(cond.indicatorType)) {
    return cond.indicatorType === 'NEW_LOW' ? '신저가 기간 (봉)' : '신고가 기간 (봉)';
  }
  return null;
}

/** 복합지표 요소1(단기)·요소2(장기) 기간 프리셋 */
export function getCompositePeriodPresetOptions(
  indicatorType: string,
  def: IndicatorPeriodDef,
  side: 'left' | 'right',
): number[] {
  const { short, long } = getCompositeDefaultPeriods(indicatorType, def as CompositePeriodDef);
  const base = side === 'left' ? short : long;
  return [...new Set([base, short, long, ...COMMON_PERIODS])].sort((a, b) => a - b);
}

/** 복합지표 조건대상1/2 드롭다운 — CCI 1 라인(9일) 형식 */
export function getCompositeLeftCandleType(cond: ConditionDSL): string {
  return normalizeStartCandleType(cond.leftCandleType ?? DEFAULT_START_CANDLE);
}

export function getCompositeRightCandleType(cond: ConditionDSL): string {
  return normalizeStartCandleType(cond.rightCandleType ?? DEFAULT_START_CANDLE);
}

export function setCompositeLeftCandleType(cond: ConditionDSL, candleType: string): ConditionDSL {
  return syncCompositeFields({
    ...cond,
    composite: true,
    leftCandleType: normalizeStartCandleType(candleType),
  });
}

export function setCompositeRightCandleType(cond: ConditionDSL, candleType: string): ConditionDSL {
  return syncCompositeFields({
    ...cond,
    composite: true,
    rightCandleType: normalizeStartCandleType(candleType),
  });
}

export function getCompositeFieldOpts(
  indicatorType: string,
  slot: 1 | 2,
  def: IndicatorPeriodDef,
  cond: ConditionDSL,
): { value: string; label: string }[] {
  const side = slot === 1 ? 'left' : 'right';
  const current = slot === 1
    ? getConditionValuePeriod(cond, def)
    : getConditionRightPeriod(cond, def);
  const presets = getCompositePeriodPresetOptions(indicatorType, def, side);
  const periods = [...new Set([...presets, current])].sort((a, b) => a - b);

  if (isDonchianComposite(indicatorType)) {
    const opts = getDonchianFieldOpts(periods);
    const cur = slot === 1 ? cond.leftField : cond.rightField;
    if (cur && !opts.some(o => o.value === cur)) {
      const p = parseDonchianPeriod(cur);
      const label = p != null ? compositeFieldLabel(indicatorType, slot, p) : cur;
      return [{ value: cur, label }, ...opts];
    }
    return opts;
  }

  return periods.map(p => ({
    value: compositeValueField(indicatorType, p),
    label: compositeFieldLabel(indicatorType, slot, p),
  }));
}

export function getThresholdPresetOptions(indicatorType: string): number[] {
  switch (indicatorType) {
    case 'RSI':
    case 'PSYCHOLOGICAL':
    case 'INVEST_PSYCHOLOGICAL':
      return [20, 25, 30, 50, 70, 75, 80];
    case 'NEW_PSYCHOLOGICAL':
      return [-50, -25, 0, 25, 50];
    case 'STOCHASTIC':
      return [20, 50, 80];
    case 'CCI':
      return [-200, -100, -50, 0, 50, 100, 150, 200];
    case 'WILLIAMS_R':
      return [-80, -50, -20];
    case 'ADX':
    case 'DMI':
      return [20, 25, 30, 40, 50];
    case 'VR':
      return [70, 100, 150, 200, 250];
    default:
      return [-100, -50, 0, 50, 100];
  }
}

export function getThresholdBounds(indicatorType: string): { min: number; max: number } {
  switch (indicatorType) {
    case 'RSI':
    case 'PSYCHOLOGICAL':
    case 'INVEST_PSYCHOLOGICAL':
    case 'STOCHASTIC':
      return { min: 0, max: 100 };
    case 'NEW_PSYCHOLOGICAL':
      return { min: -100, max: 100 };
    case 'WILLIAMS_R':
      return { min: -100, max: 0 };
    case 'CCI':
      return { min: -500, max: 500 };
    default:
      return { min: -1000, max: 1000 };
  }
}