/** Stochastic 과열(≥80) × 보조지표 중앙선 — 순차 OR 복합 매수 조건 */
import type { ConditionDSL, LogicNode } from './strategyTypes';
import { initConditionPeriodsInherit, type IndicatorPeriodDef } from './conditionPeriods';
import { genId } from './strategyNodeIds';
import { THRESHOLD_HL_MID, THRESHOLD_HL_OVER } from './thresholdSymbols';

export const STOCH_OVERBOUGHT_PAIR_VALUE = 'STOCH_OVERBOUGHT_PAIR';

export const STOCH_PAIR_SECONDARY_OPTIONS: { value: string; label: string }[] = [
  { value: 'CCI', label: 'CCI' },
  { value: 'RSI', label: 'RSI' },
  { value: 'ADX', label: 'ADX' },
  { value: 'WILLIAMS_R', label: 'Williams %R' },
  { value: 'TRIX', label: 'TRIX' },
  { value: 'VR', label: 'VR' },
  { value: 'PSYCHOLOGICAL', label: '심리도' },
  { value: 'NEW_PSYCHOLOGICAL', label: '신심리도' },
  { value: 'INVEST_PSYCHOLOGICAL', label: '투자심리도' },
  { value: 'BWI', label: 'BWI' },
  { value: 'VOLUME_OSC', label: 'Volume OSC' },
];

const SECONDARY_VALUE_FIELD: 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',
  BWI: 'BWI_VALUE',
  VOLUME_OSC: 'VOLUME_OSC_VALUE',
};

function secondaryLabel(indicatorType: string): string {
  return STOCH_PAIR_SECONDARY_OPTIONS.find(o => o.value === indicatorType)?.label ?? indicatorType;
}

export function isStochOverboughtPairPaletteValue(value: string): boolean {
  return value === STOCH_OVERBOUGHT_PAIR_VALUE;
}

export function isStochOverboughtPairRoot(node: LogicNode): boolean {
  return node.type === 'OR' && !!node.stochPair?.secondaryIndicatorType;
}

export function getSecondaryValueField(indicatorType: string): string {
  return SECONDARY_VALUE_FIELD[indicatorType] ?? `${indicatorType}_VALUE`;
}

function makePairCondition(
  indicatorType: string,
  conditionType: string,
  leftField: string,
  rightField: string,
  def: IndicatorPeriodDef,
): LogicNode {
  const base: ConditionDSL = {
    indicatorType,
    conditionType,
    leftField,
    rightField,
    candleRange: 1,
    valuePeriodOverride: false,
    thresholdOverride: false,
    rightPeriodOverride: false,
  };
  return {
    id: genId(),
    type: 'CONDITION',
    condition: initConditionPeriodsInherit(indicatorType, base, def),
  };
}

/** (Stoch≥과열 AND 보조 CROSS_UP 중앙) OR (보조≥중앙 AND Stoch CROSS_UP 과열) */
export function buildStochOverboughtPairTree(
  secondaryIndicator: string,
  def: IndicatorPeriodDef,
): LogicNode {
  const sec = STOCH_PAIR_SECONDARY_OPTIONS.some(o => o.value === secondaryIndicator)
    ? secondaryIndicator
    : 'CCI';
  const secField = getSecondaryValueField(sec);

  return {
    id: genId(),
    type: 'OR',
    stochPair: { secondaryIndicatorType: sec },
    children: [
      {
        id: genId(),
        type: 'AND',
        children: [
          makePairCondition('STOCHASTIC', 'GTE', 'STOCH_K', THRESHOLD_HL_OVER, def),
          makePairCondition(sec, 'CROSS_UP', secField, THRESHOLD_HL_MID, def),
        ],
      },
      {
        id: genId(),
        type: 'AND',
        children: [
          makePairCondition(sec, 'GTE', secField, THRESHOLD_HL_MID, def),
          makePairCondition('STOCHASTIC', 'CROSS_UP', 'STOCH_K', THRESHOLD_HL_OVER, def),
        ],
      },
    ],
  };
}

/** 보조지표 변경 시 기존 OR·AND 노드 id 유지 */
export function setStochPairSecondary(
  root: LogicNode,
  secondaryIndicator: string,
  def: IndicatorPeriodDef,
): LogicNode {
  if (!isStochOverboughtPairRoot(root)) return root;

  const rebuilt = buildStochOverboughtPairTree(secondaryIndicator, def);
  const preserveIds = (next: LogicNode, prev: LogicNode | undefined): LogicNode => ({
    ...next,
    id: prev?.id ?? next.id,
    children: next.children?.map((child, i) =>
      preserveIds(child, prev?.children?.[i]),
    ),
  });

  return preserveIds(rebuilt, root);
}

export function stochPairDisplayName(secondaryIndicator: string): string {
  return `Stoch 과열×${secondaryLabel(secondaryIndicator)}`;
}

export function stochPairSummaryText(secondaryIndicator: string): string {
  const sec = secondaryLabel(secondaryIndicator);
  return `(Stoch≥과열 AND ${sec} 중앙 상향) OR (${sec}≥중앙 AND Stoch 과열 상향)`;
}

export function stochPairPaletteDesc(secondaryIndicator: string): string {
  const sec = secondaryLabel(secondaryIndicator);
  return `Stoch≥80 + ${sec} 0선(중앙) 돌파 또는 ${sec}≥중앙 + Stoch 과열 돌파`;
}

function nodeContainsId(node: LogicNode, targetId: string): boolean {
  if (node.id === targetId) return true;
  return (node.children ?? []).some(c => nodeContainsId(c, targetId));
}

/** nodeId를 포함하는 Stoch 과열×보조 OR 루트 탐색 */
export function findStochPairRootContaining(
  node: LogicNode | null | undefined,
  targetId: string,
): LogicNode | null {
  if (!node) return null;
  if (isStochOverboughtPairRoot(node) && nodeContainsId(node, targetId)) {
    return node;
  }
  for (const child of node.children ?? []) {
    const hit = findStochPairRootContaining(child, targetId);
    if (hit) return hit;
  }
  return null;
}

export function findStochPairRootInForest(
  roots: (LogicNode | null | undefined)[],
  targetId: string,
): LogicNode | null {
  for (const root of roots) {
    const hit = findStochPairRootContaining(root, targetId);
    if (hit) return hit;
  }
  return null;
}

/** OR 서브트리 전체를 새 보조지표로 재구성 (노드 id 유지) */
export function patchStochPairInTree(
  root: LogicNode | null,
  orNodeId: string,
  secondaryIndicator: string,
  def: IndicatorPeriodDef,
): LogicNode | null {
  if (!root) return null;
  if (root.id === orNodeId && isStochOverboughtPairRoot(root)) {
    return setStochPairSecondary(root, secondaryIndicator, def);
  }
  if (!root.children?.length) return root;
  return {
    ...root,
    children: root.children.map(c => patchStochPairInTree(c, orNodeId, secondaryIndicator, def) ?? c),
  };
}