import type { VersionWithContext } from './derive';
import type { XiaobaoRiskInsight } from './xiaobao-risk-cache';
import type { XiaobaoVersionRisk } from './xiaobao-risk';
import { WORK_HOURS } from './work-hours';

const UNFINISHED_VERSION_STATUSES = new Set(['planned', 'developing', 'paused']);
const HIGH_RISK_LEVELS = new Set<XiaobaoVersionRisk['riskLevel']>(['at_risk', 'likely_delayed', 'blocked']);
const PAGE_REFRESH_ADVICE_PATTERNS = [
  /(刷新|重新加载|重载).*(页面|浏览器|小宝|预警)/i,
  /(页面|浏览器|小宝|预警).*(刷新|重新加载|重载)/i,
  /(手动|主动).*(触发|刷新).*(更新|预警|分析)/i,
  /(manual|manually).*(refresh|reload|trigger)/i,
  /(refresh|reload).*(page|browser|xiaobao|warning)/i,
];

export interface XiaobaoWarningVersionFilter {
  canManage: boolean;
  userName?: string;
}

export type XiaobaoWarningRiskFilter = 'all' | 'attention' | 'high';

export interface XiaobaoWarningRiskListFilter {
  riskFilter?: XiaobaoWarningRiskFilter;
  productId?: string;
  projectId?: string;
}

export function filterXiaobaoWarningVersions(
  versions: VersionWithContext[],
  filter: XiaobaoWarningVersionFilter,
): VersionWithContext[] {
  return versions.filter((version) => {
    if (!UNFINISHED_VERSION_STATUSES.has(version.status)) return false;
    if (filter.canManage) return true;
    if (!filter.userName) return false;
    return (version.members ?? []).some((member) => member.name === filter.userName);
  });
}

export function filterXiaobaoRiskWarnings(
  risks: XiaobaoVersionRisk[],
  filter: XiaobaoWarningRiskListFilter = {},
): XiaobaoVersionRisk[] {
  return risks.filter((risk) => {
    if (risk.riskLevel === 'on_track') return false;
    if (filter.productId && risk.productId !== filter.productId) return false;
    if (filter.projectId && risk.projectId !== filter.projectId) return false;
    if (filter.riskFilter === 'attention') return true;
    if (filter.riskFilter === 'high') return HIGH_RISK_LEVELS.has(risk.riskLevel);
    return true;
  });
}

export function getXiaobaoWarningRiskCount(risks: XiaobaoVersionRisk[]): number {
  return filterXiaobaoRiskWarnings(risks).length;
}

export function formatRemainingWork(hours: number): string {
  const safeHours = Number.isFinite(hours) && hours > 0 ? hours : 0;
  const days = safeHours / WORK_HOURS.hoursPerDay;
  return `${formatNumber(safeHours)}h / ${formatNumber(days)}天`;
}

export function sanitizeRiskInsight(insight: XiaobaoRiskInsight): XiaobaoRiskInsight {
  return {
    ...insight,
    suggestedActions: insight.suggestedActions.filter((action) => !isPageRefreshAdvice(action)),
    ownerHints: insight.ownerHints.filter((hint) => !isPageRefreshAdvice(hint)),
  };
}

function formatNumber(value: number): string {
  if (Number.isInteger(value)) return String(value);
  return value.toFixed(1).replace(/\.0$/, '');
}

function isPageRefreshAdvice(text: string): boolean {
  return PAGE_REFRESH_ADVICE_PATTERNS.some((pattern) => pattern.test(text));
}