/**
 * Centralized pattern detection for keyword matching
 *
 * Purpose: Unified keyword matching patterns used across multiple services:
 * - Tool category detection (tools/index.ts)
 * - Memory category detection (openai-service.ts)
 * - Region/tech stack detection (server-agent.ts)
 */

// ============================================================================
// Tool Category Patterns
// ============================================================================

export const DOMAIN_PATTERNS = /도메인|네임서버|whois|dns|tld|등록|\.com|\.net|\.io|\.kr|\.org/i;
export const DEPOSIT_PATTERNS = /입금|충전|잔액|계좌|예치금|송금|돈/i;
export const SERVER_PATTERNS = /서버|VPS|클라우드|호스팅|인스턴스|linode|vultr|\d+번\s*(?:시작|중지|정지|재시작|리셋|리부팅|삭제|해지)|#\d+\s*(?:시작|중지|정지|재시작|리셋|리부팅|삭제|해지)|reboot/i;
export const TROUBLESHOOT_PATTERNS = /문제|에러|오류|안[돼되]|느려|트러블|장애|버그|실패|안\s*됨/i;
export const WEATHER_PATTERNS = /날씨|기온|비|눈|맑|흐림|더워|추워/i;
export const SEARCH_PATTERNS = /검색|찾아|뭐야|뉴스|최신/i;
export const REDDIT_PATTERNS = /레딧|reddit|서브레딧|subreddit/i;
export const DDOS_PATTERNS = /ddos|DDoS|공격|트래픽\s*폭주|서비스\s*마비|봇\s*공격|디도스|대역폭\s*공격/i;

// ============================================================================
// Memory Category Patterns
// ============================================================================

// Company/workplace patterns
export const COMPANY_PATTERNS = /(?:에서|에)\s*(?:일해|일하고|근무|다녀)/;

// Tech/learning patterns
export const TECH_LEARNING_PATTERNS = /(?:공부|개발|작업|배우)/;

// Role patterns
export const ROLE_PATTERNS = /(?:개발자|엔지니어|디자이너|기획자)/;

// Location patterns
export const LOCATION_PATTERNS = /(?:에서|에)\s*(?:살아|거주|있어)/;

// Server/infrastructure patterns (for memory)
export const SERVER_INFRA_PATTERNS = /(?:AWS|GCP|Azure|Vultr|Linode|DigitalOcean|클라우드|가비아|카페24|서버\s*\d|트래픽|DAU|MAU|동시접속|쿠버네티스|k8s|도커|docker|컨테이너)/i;

// ============================================================================
// Region Patterns (Korean/English/Japanese)
// ============================================================================

export const REGION_PATTERNS = {
  korea: /한국|서울|korea|seoul|kr\b/i,
  japan: /일본|도쿄|tokyo|japan|jp\b/i,
  osaka: /오사카|osaka/i,
  singapore: /싱가포르|singapore|sg\b/i,
  us: /미국|us|america|달라스|프리몬트/i,
} as const;

// ============================================================================
// Tech Stack Patterns
// ============================================================================

export const TECH_PATTERNS = {
  // Databases
  postgresql: /postgresql|postgres|postgis/i,
  mysql: /mysql|mariadb/i,
  mongodb: /mongodb|mongo/i,

  // Cache/Messaging
  redis: /redis/i,
  memcached: /memcached/i,
  messaging: /kafka|rabbitmq/i,

  // Runtimes
  nodejs: /node\.?js|nodejs|express/i,
  python: /python|django|flask|fastapi/i,
  java: /java|spring/i,
  go: /golang|go\s/i,

  // Platforms
  wordpress: /wordpress/i,
  php: /laravel|php/i,

  // Service Types
  saas: /saas|b2b|enterprise/i,
  ecommerce: /ecommerce|쇼핑몰|이커머스/i,
  game: /게임|game|minecraft|팰월드|palworld/i,
  streaming: /streaming|스트리밍|video/i,
} as const;

// ============================================================================
// Pattern Matching Functions
// ============================================================================

/**
 * Check if text matches a given pattern
 */
export function matchesPattern(text: string, pattern: RegExp): boolean {
  return pattern.test(text);
}

/**
 * Detect tool categories from message text
 * @returns Array of category names that match
 */
export function detectToolCategories(text: string): string[] {
  const categories: string[] = [];

  if (DOMAIN_PATTERNS.test(text)) categories.push('domain');
  if (DEPOSIT_PATTERNS.test(text)) categories.push('deposit');
  if (SERVER_PATTERNS.test(text)) categories.push('server');
  if (TROUBLESHOOT_PATTERNS.test(text)) categories.push('troubleshoot');
  if (DDOS_PATTERNS.test(text)) categories.push('ddos');
  if (WEATHER_PATTERNS.test(text)) categories.push('weather');
  if (SEARCH_PATTERNS.test(text)) categories.push('search');
  if (REDDIT_PATTERNS.test(text)) categories.push('reddit');

  return categories;
}

/**
 * Detect memory category from message content
 * @returns Category name or null if no match
 */
export type MemoryCategory = 'company' | 'tech' | 'role' | 'location' | 'server' | null;

export function detectMemoryCategory(content: string): MemoryCategory {
  // Company/workplace
  if (COMPANY_PATTERNS.test(content)) {
    return 'company';
  }
  // Tech/learning
  if (TECH_LEARNING_PATTERNS.test(content)) {
    return 'tech';
  }
  // Role
  if (ROLE_PATTERNS.test(content)) {
    return 'role';
  }
  // Location
  if (LOCATION_PATTERNS.test(content)) {
    return 'location';
  }
  // Server/infrastructure
  if (SERVER_INFRA_PATTERNS.test(content)) {
    return 'server';
  }
  return null;
}

/**
 * Detect region preference from text
 * @returns Array of region codes or undefined
 */
export function detectRegion(text: string): string[] | undefined {
  const lower = text.toLowerCase();
  const regions: string[] = [];

  if (REGION_PATTERNS.korea.test(lower)) regions.push('seoul');
  if (REGION_PATTERNS.japan.test(lower)) regions.push('tokyo');
  if (REGION_PATTERNS.osaka.test(lower)) regions.push('osaka');
  if (REGION_PATTERNS.singapore.test(lower)) regions.push('singapore');

  return regions.length > 0 ? regions : undefined;
}

/**
 * Detect tech stack from text
 * @returns Array of tech stack names
 */
export function detectTechStack(text: string): string[] {
  const lower = text.toLowerCase();
  const stack: string[] = [];

  // Databases
  if (TECH_PATTERNS.postgresql.test(lower)) stack.push('postgresql');
  if (TECH_PATTERNS.mysql.test(lower)) stack.push('mysql');
  if (TECH_PATTERNS.mongodb.test(lower)) stack.push('mongodb');

  // Cache/Messaging
  if (TECH_PATTERNS.redis.test(lower)) stack.push('redis');
  if (TECH_PATTERNS.memcached.test(lower)) stack.push('memcached');
  if (TECH_PATTERNS.messaging.test(lower)) stack.push('messaging');

  // Runtimes
  if (TECH_PATTERNS.nodejs.test(lower)) stack.push('nodejs');
  if (TECH_PATTERNS.python.test(lower)) stack.push('python');
  if (TECH_PATTERNS.java.test(lower)) stack.push('java');
  if (TECH_PATTERNS.go.test(lower)) stack.push('go');

  // Platforms
  if (TECH_PATTERNS.wordpress.test(lower)) stack.push('wordpress');
  if (TECH_PATTERNS.php.test(lower)) stack.push('php');

  // Service Types
  if (TECH_PATTERNS.saas.test(lower)) stack.push('saas');
  if (TECH_PATTERNS.ecommerce.test(lower)) stack.push('ecommerce');
  if (TECH_PATTERNS.game.test(lower)) stack.push('game');
  if (TECH_PATTERNS.streaming.test(lower)) stack.push('streaming');

  return stack;
}