// QA/QC Audit & Issue Tracking Store
// Manages history of validations and identified defects.

export type AuditResult = 'pass' | 'fail' | 'minor_issue';
export type IssueStatus = 'open' | 'fixed' | 'verified';

export interface AuditLog {
  id: string;
  scenarioId: string;
  scenarioTitle: string;
  timestamp: string;
  performer: string;
  result: AuditResult;
  notes: string;
  relatedIssueId?: string;
}

export interface SystemIssue {
  id: string;
  title: string;
  description: string;
  severity: 'high' | 'medium' | 'low';
  status: IssueStatus;
  domain: string;
  createdAt: string;
  resolvedAt?: string;
}

const LOG_KEY = 'carboany_audit_logs';
const ISSUE_KEY = 'carboany_system_issues';

/* --- Audit Logs API --- */

export function getAuditLogs(): AuditLog[] {
  const raw = localStorage.getItem(LOG_KEY);
  if (!raw) return [];
  const logs = JSON.parse(raw) as AuditLog[];

  // Self-heal: 이전 Date.now() 기반 id가 중복된 경우 UUID로 재발급
  const seen = new Set<string>();
  let mutated = false;
  for (const log of logs) {
    if (!log.id || seen.has(log.id)) {
      log.id = newId('log');
      mutated = true;
    }
    seen.add(log.id);
  }
  if (mutated) {
    localStorage.setItem(LOG_KEY, JSON.stringify(logs));
  }
  return logs;
}

function newId(prefix: string): string {
  // crypto.randomUUID()는 동기 루프에서도 충돌하지 않음. Date.now 기반은 ms 단위 중복 위험.
  if (typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function') {
    return `${prefix}-${crypto.randomUUID()}`;
  }
  return `${prefix}-${Date.now()}-${Math.random().toString(36).slice(2, 10)}`;
}

export function recordAudit(log: Omit<AuditLog, 'id' | 'timestamp'>): AuditLog {
  const logs = getAuditLogs();
  const newLog: AuditLog = {
    ...log,
    id: newId('log'),
    timestamp: new Date().toISOString(),
  };
  logs.unshift(newLog); // Newest first
  localStorage.setItem(LOG_KEY, JSON.stringify(logs));
  return newLog;
}

/* --- Issues API --- */

export function getSystemIssues(): SystemIssue[] {
  const raw = localStorage.getItem(ISSUE_KEY);
  return raw ? JSON.parse(raw) : [];
}

export function reportIssue(issue: Omit<SystemIssue, 'id' | 'createdAt' | 'status'>): SystemIssue {
  const issues = getSystemIssues();
  const newIssue: SystemIssue = {
    ...issue,
    id: newId('issue'),
    status: 'open',
    createdAt: new Date().toISOString(),
  };
  issues.unshift(newIssue);
  localStorage.setItem(ISSUE_KEY, JSON.stringify(issues));
  return newIssue;
}

export function updateIssueStatus(id: string, status: IssueStatus): void {
  const issues = getSystemIssues();
  const idx = issues.findIndex(i => i.id === id);
  if (idx >= 0) {
    issues[idx].status = status;
    if (status === 'fixed' || status === 'verified') {
      issues[idx].resolvedAt = new Date().toISOString();
    }
    localStorage.setItem(ISSUE_KEY, JSON.stringify(issues));
  }
}

/* --- Initial Seed for History (Previously done tasks) --- */
export function seedPreviousHistory() {
  if (getAuditLogs().length > 0) return;

  const prevTasks = [
    { sid: 'p-01', title: '사용자 온보딩', result: 'pass' as const, notes: 'AuthContext 내 자동 참여 로직 확인 완료' },
    { sid: 'a-05', title: '관리자 대시보드 실데이터', result: 'pass' as const, notes: 'Stage 1-3 LIVE 연동 확인' },
    { sid: 's-03', title: 'ESG 보고서 ↔ Scope3 연동', result: 'pass' as const, notes: 'SME 기부 실적 오버레이 성공' },
  ];

  prevTasks.forEach(t => {
    recordAudit({
      scenarioId: t.sid,
      scenarioTitle: t.title,
      performer: 'Gemini CLI',
      result: t.result,
      notes: t.notes
    });
  });
}