import { coerceFiniteNumber } from './safeFormat';
import {
  formatIndicatorValue,
  type VirtualConditionRow,
} from './virtualStrategyConditions';

export type ConditionStatus = 'match' | 'pending' | 'nomatch' | 'unknown';

export interface ConditionMetric {
  row: VirtualConditionRow & { currentValue: number | null };
  status: ConditionStatus;
  /** 조건 매칭율 0~100 — 백엔드 Ta4j satisfied 만 반영 */
  matchRate: number;
  /** @deprecated matchRate 와 동일 — 하위 호환 */
  progress: number | null;
}

export type HeatTier = 'nomatch' | 'pending' | 'match';

/** Heatmap 색상 — Mismatch(빨강) · Pending(오렌지) · Match(푸른색) */
export function resolveHeatTier(matchRate: number, status: ConditionStatus): HeatTier {
  if (status === 'match' || matchRate >= 100) return 'match';
  if (status === 'pending') return 'pending';
  if (status === 'nomatch') return 'nomatch';
  return 'nomatch';
}

export type TrafficLightState = 'red' | 'yellow' | 'blue';

/** 조건별 매칭율 (0~100) — 백엔드 live-conditions 의 satisfied 만 사용 */
export function computeConditionMatchRate(
  row: VirtualConditionRow & { currentValue: number | null },
): number {
  if (row.satisfied === true) return 100;
  if (row.satisfied === false) return 0;
  return 0;
}

export function getConditionStatus(
  _conditionType: string,
  _current: number | null,
  _target: number | null,
  satisfied?: boolean | null,
): ConditionStatus {
  if (satisfied === true) return 'match';
  if (satisfied === false) return 'nomatch';
  return 'unknown';
}

export function formatStrategyThreshold(
  conditionType: string,
  target: number | null,
  conditionLabel: string,
): string {
  if (target == null) return '—';
  const v = formatIndicatorValue(target);
  switch (conditionType) {
    case 'LT':
    case 'CROSS_DOWN':
      return `< ${v}`;
    case 'GT':
    case 'CROSS_UP':
      return `> ${v}`;
    case 'GTE':
      return `≥ ${v}`;
    case 'LTE':
      return `≤ ${v}`;
    case 'EQ':
      return `= ${v}`;
    case 'NEQ':
      return `≠ ${v}`;
    default:
      return `${conditionLabel} ${v}`;
  }
}

export function normalizeConditionRow(
  row: VirtualConditionRow & { currentValue?: unknown },
): VirtualConditionRow & { currentValue: number | null } {
  return {
    ...row,
    targetValue: coerceFiniteNumber(row.targetValue),
    currentValue: coerceFiniteNumber(row.currentValue ?? null),
  };
}

export function buildConditionMetrics(
  rows: Array<VirtualConditionRow & { currentValue: number | null }>,
): ConditionMetric[] {
  return rows.map(raw => {
    const row = normalizeConditionRow(raw);
    const matchRate = computeConditionMatchRate(row);
    return {
      row,
      status: getConditionStatus(
        row.conditionType,
        row.currentValue,
        row.targetValue,
        row.satisfied,
      ),
      matchRate,
      progress: matchRate,
    };
  });
}

/** 전체 매매조건 일치율 — 백엔드 matchRate 우선 */
export function computeMatchRate(
  metrics: ConditionMetric[],
  backendMatchRate?: number | unknown,
): number {
  const backend = coerceFiniteNumber(backendMatchRate);
  if (backend != null) {
    return Math.round(Math.min(100, Math.max(0, backend)));
  }
  const evaluable = metrics.filter(m => m.status !== 'unknown');
  if (evaluable.length === 0) return 0;
  const met = evaluable.filter(m => m.status === 'match').length;
  return Math.round((met / evaluable.length) * 100);
}

export function getTrafficLightState(matchRate: number, metrics: ConditionMetric[]): TrafficLightState {
  if (matchRate >= 100) return 'blue';
  const hasPartial = metrics.some(m => m.status === 'match');
  if (hasPartial || matchRate >= 40) return 'yellow';
  return 'red';
}

/** side 카드 헤드라인 — DSL 전체 Rule 충족 시 100% (리프 비율과 구분) */
export function resolveSideHeadlineMatchRate(
  metrics: ConditionMetric[],
  overallMet?: boolean | null,
): number {
  if (overallMet === true) return 100;
  return computeMatchRate(metrics);
}

export function resolveSideTrafficState(
  metrics: ConditionMetric[],
  overallMet?: boolean | null,
): TrafficLightState {
  const rate = resolveSideHeadlineMatchRate(metrics, overallMet);
  if (overallMet === true) return 'blue';
  if (overallMet === false && rate === 0) return 'red';
  return getTrafficLightState(rate, metrics);
}

export function formatUpdatedTime(ts: number | undefined): string {
  if (!ts) return '—';
  return new Date(ts).toLocaleTimeString('ko-KR', {
    hour: '2-digit',
    minute: '2-digit',
    second: '2-digit',
    hour12: false,
  });
}

/** 카드 푸터용 전략 조건 한 줄 요약 */
export function formatVirtualConditionBrief(
  row: VirtualConditionRow & { currentValue?: number | null },
): string {
  const sideTag = row.side === 'buy' ? '[매수]' : row.side === 'sell' ? '[매도]' : '';
  const threshold = row.thresholdLabel
    ?? formatStrategyThreshold(row.conditionType, row.targetValue, row.conditionLabel);
  return [sideTag, row.displayName, threshold].filter(Boolean).join(' ');
}

export function formatVirtualCardConditionLines(
  rows: Array<VirtualConditionRow & { currentValue?: number | null }>,
): string[] {
  return rows.map(formatVirtualConditionBrief);
}