// /js/api-base.js
// API 기본 설정 및 보안 유틸리티 - System 2 (신고 시스템)

(function() {
  'use strict';

  // ==================== SSO 쿠키 유틸리티 ====================

  function cookieGet(name) {
    var match = document.cookie.match(new RegExp('(?:^|; )' + name + '=([^;]*)'));
    return match ? decodeURIComponent(match[1]) : null;
  }
  function cookieRemove(name) {
    var cookie = name + '=; path=/; max-age=0';
    if (window.location.hostname.includes('technicalkorea.net')) {
      cookie += '; domain=.technicalkorea.net';
    }
    document.cookie = cookie;
  }

  /**
   * SSO 토큰 가져오기 (쿠키 우선, localStorage 폴백)
   */
  window.getSSOToken = function() {
    return cookieGet('sso_token') || localStorage.getItem('sso_token');
  };

  window.getSSOUser = function() {
    var raw = cookieGet('sso_user') || localStorage.getItem('sso_user');
    try { return raw ? JSON.parse(raw) : null; } catch(e) { return null; }
  };

  /**
   * 중앙 로그인 URL 반환 (System 2 → tkfb 도메인의 로그인으로)
   */
  window.getLoginUrl = function() {
    var hostname = window.location.hostname;
    if (hostname.includes('technicalkorea.net')) {
      return window.location.protocol + '//tkfb.technicalkorea.net/login?redirect=' + encodeURIComponent(window.location.href);
    }
    return window.location.protocol + '//' + hostname + ':30000/login?redirect=' + encodeURIComponent(window.location.href);
  };

  window.clearSSOAuth = function() {
    cookieRemove('sso_token');
    cookieRemove('sso_user');
    cookieRemove('sso_refresh_token');
    localStorage.removeItem('sso_token');
    localStorage.removeItem('sso_user');
    localStorage.removeItem('sso_refresh_token');
  };

  // ==================== 보안 유틸리티 (XSS 방지) ====================

  window.escapeHtml = function(str) {
    if (str === null || str === undefined) return '';
    if (typeof str !== 'string') str = String(str);

    var htmlEntities = {
      '&': '&',
      '<': '&lt;',
      '>': '&gt;',
      '"': '&quot;',
      "'": '&#39;',
      '/': '&#x2F;',
      '`': '&#x60;',
      '=': '&#x3D;'
    };

    return str.replace(/[&<>"'`=\/]/g, function(char) {
      return htmlEntities[char];
    });
  };

  window.escapeUrl = function(str) {
    if (str === null || str === undefined) return '';
    return encodeURIComponent(String(str));
  };

  // ==================== API 설정 ====================

  var API_PORT = 30105;
  var API_PATH = '/api';

  function getApiBaseUrl() {
    var hostname = window.location.hostname;
    var protocol = window.location.protocol;

    // 프로덕션 환경 - 같은 도메인의 /api 경로 (system2-web nginx가 프록시)
    if (hostname.includes('technicalkorea.net')) {
      return protocol + '//' + hostname + API_PATH;
    }

    // 개발 환경
    return protocol + '//' + hostname + ':' + API_PORT + API_PATH;
  }

  var apiUrl = getApiBaseUrl();
  window.API_BASE_URL = apiUrl;
  window.API = apiUrl;

  // 인증 헤더 생성 - SSO 토큰 사용 (쿠키/localStorage)
  window.getAuthHeaders = function() {
    var token = window.getSSOToken();
    return {
      'Content-Type': 'application/json',
      'Authorization': token ? 'Bearer ' + token : ''
    };
  };

  // API 호출 헬퍼
  window.apiCall = async function(endpoint, method, data) {
    method = method || 'GET';
    var url = window.API_BASE_URL + endpoint;
    var config = {
      method: method,
      headers: window.getAuthHeaders()
    };

    if (data && (method === 'POST' || method === 'PUT' || method === 'PATCH' || method === 'DELETE')) {
      config.body = JSON.stringify(data);
    }

    var response = await fetch(url, config);

    // 401 Unauthorized 처리
    if (response.status === 401) {
      window.clearSSOAuth();
      window.location.href = window.getLoginUrl();
      throw new Error('인증이 만료되었습니다.');
    }

    return response.json();
  };

  console.log('[System2] API 설정 완료:', window.API_BASE_URL);
})();