import * as plugins from './plugins.js';
import { logger } from './unifi.logger.js';
import { UnifiHttp } from './classes.unifihttp.js';
import { DeviceManager } from './classes.devicemanager.js';
import { ClientManager } from './classes.clientmanager.js';
import type {
  IUnifiControllerOptions,
  INetworkAuthResponse,
  INetworkSite,
  IUnifiApiResponse,
  THttpMethod,
} from './interfaces/index.js';

/**
 * UniFi Controller - Entry point for Network Controller API
 *
 * This class provides access to the UniFi Network Controller API.
 * Supports two authentication methods:
 * 1. API Key (preferred) - Set X-API-Key header, no login required
 * 2. Session auth - Username/password login with session cookies
 *
 * @example
 * ```typescript
 * // Using API key (no login required)
 * const controller = new UnifiController({
 *   host: '192.168.1.1',
 *   apiKey: 'your-api-key',
 * });
 * const devices = await controller.deviceManager.listDevices();
 *
 * // Using session auth (requires login)
 * const controller = new UnifiController({
 *   host: '192.168.1.1',
 *   username: 'admin',
 *   password: 'password',
 * });
 * await controller.login();
 * const devices = await controller.deviceManager.listDevices();
 * await controller.logout();
 * ```
 */
export class UnifiController {
  /** Controller host */
  private host: string;

  /** API key for authentication */
  private apiKey?: string;

  /** Username for session authentication */
  private username?: string;

  /** Password for session authentication */
  private password?: string;

  /** Controller type determines API paths */
  private controllerType: 'unifi-os' | 'udm-pro' | 'standalone';

  /** Whether to verify SSL certificates */
  private verifySsl: boolean;

  /** HTTP client */
  private http: UnifiHttp;

  /** Whether currently authenticated */
  private authenticated: boolean = false;

  /** CSRF token (for UniFi OS session auth) */
  private csrfToken?: string;

  /** Device manager instance */
  public deviceManager: DeviceManager;

  /** Client manager instance */
  public clientManager: ClientManager;

  constructor(options: IUnifiControllerOptions) {
    this.host = options.host.replace(/\/$/, '');
    this.apiKey = options.apiKey;
    this.username = options.username;
    this.password = options.password;
    this.controllerType = options.controllerType || 'unifi-os';
    this.verifySsl = options.verifySsl ?? false;

    // Build base URL based on controller type
    const baseUrl = this.getBaseUrl();
    this.http = new UnifiHttp(baseUrl, this.verifySsl);

    // If API key provided, set it and mark as authenticated
    if (this.apiKey) {
      this.http.setHeader('X-API-Key', this.apiKey);
      this.authenticated = true;
    }

    // Initialize managers
    this.deviceManager = new DeviceManager(this);
    this.clientManager = new ClientManager(this);

    logger.log('info', `UnifiController initialized for ${this.host} (${this.controllerType})`);
  }

  /**
   * Get the base URL for API requests based on controller type
   */
  private getBaseUrl(): string {
    // Add https:// if not present
    const host = this.host.startsWith('http') ? this.host : `https://${this.host}`;

    switch (this.controllerType) {
      case 'unifi-os':
      case 'udm-pro':
        // UniFi OS consoles (UDM, UDM Pro, Cloud Key Gen2+) use /proxy/network prefix
        return `${host}/proxy/network`;
      case 'standalone':
        // Standalone controllers (software controller)
        return host;
      default:
        return host;
    }
  }

  /**
   * Get the login endpoint based on controller type
   */
  private getLoginEndpoint(): string {
    switch (this.controllerType) {
      case 'unifi-os':
      case 'udm-pro':
        // UniFi OS uses the root /api/auth/login
        return '/api/auth/login';
      case 'standalone':
        return '/api/login';
      default:
        return '/api/login';
    }
  }

  /**
   * Get the logout endpoint based on controller type
   */
  private getLogoutEndpoint(): string {
    switch (this.controllerType) {
      case 'unifi-os':
      case 'udm-pro':
        return '/api/auth/logout';
      case 'standalone':
        return '/api/logout';
      default:
        return '/api/logout';
    }
  }

  /**
   * Login to the controller (only needed for session auth, not API key)
   */
  public async login(): Promise<void> {
    // If using API key, already authenticated
    if (this.apiKey) {
      logger.log('info', 'Using API key authentication, no login required');
      this.authenticated = true;
      return;
    }

    if (!this.username || !this.password) {
      throw new Error('Username and password required for session authentication');
    }

    logger.log('info', `Logging in to UniFi Controller at ${this.host}`);

    // For UniFi OS, login happens at the console level (not through /proxy/network)
    let loginUrl: string;
    if (this.controllerType === 'unifi-os' || this.controllerType === 'udm-pro') {
      const host = this.host.startsWith('http') ? this.host : `https://${this.host}`;
      loginUrl = `${host}${this.getLoginEndpoint()}`;
    } else {
      loginUrl = `${this.getBaseUrl()}${this.getLoginEndpoint()}`;
    }

    // Create a separate HTTP client for login (different base URL for UniFi OS)
    const loginHttp = new UnifiHttp(
      loginUrl.replace(this.getLoginEndpoint(), ''),
      this.verifySsl
    );

    const response = await loginHttp.rawRequest('POST', this.getLoginEndpoint(), {
      username: this.username,
      password: this.password,
    });

    if (!response.ok) {
      const errorText = await response.text().catch(() => 'Unknown error');
      throw new Error(`Login failed: HTTP ${response.status} - ${errorText}`);
    }

    // Store cookies from response
    const setCookieHeaders = response.headers?.['set-cookie'];
    if (setCookieHeaders && Array.isArray(setCookieHeaders)) {
      this.http.setCookies(setCookieHeaders);
    }

    // Extract CSRF token from response (UniFi OS)
    const csrfHeader = response.headers?.['x-csrf-token'];
    if (csrfHeader) {
      this.csrfToken = Array.isArray(csrfHeader) ? csrfHeader[0] : csrfHeader;
      this.http.setHeader('X-CSRF-Token', this.csrfToken);
    }

    this.authenticated = true;
    logger.log('info', 'Successfully logged in to UniFi Controller');
  }

  /**
   * Logout from the controller (only for session auth)
   */
  public async logout(): Promise<void> {
    // If using API key, nothing to logout
    if (this.apiKey) {
      return;
    }

    if (!this.authenticated) {
      return;
    }

    logger.log('info', 'Logging out from UniFi Controller');

    try {
      // For UniFi OS, logout happens at the console level
      if (this.controllerType === 'unifi-os' || this.controllerType === 'udm-pro') {
        const host = this.host.startsWith('http') ? this.host : `https://${this.host}`;
        const logoutHttp = new UnifiHttp(host, this.verifySsl);
        logoutHttp.setCookies([this.http.getCookieHeader()]);
        if (this.csrfToken) {
          logoutHttp.setHeader('X-CSRF-Token', this.csrfToken);
        }
        await logoutHttp.rawRequest('POST', this.getLogoutEndpoint());
      } else {
        await this.http.rawRequest('POST', this.getLogoutEndpoint());
      }
    } catch (error) {
      logger.log('warn', `Logout error (may be expected): ${error}`);
    }

    this.authenticated = false;
    this.csrfToken = undefined;
  }

  /**
   * Check if logged in
   */
  public isAuthenticated(): boolean {
    return this.authenticated;
  }

  /**
   * Make a request to the controller API
   */
  public async request<T>(
    method: THttpMethod,
    endpoint: string,
    data?: unknown
  ): Promise<T> {
    if (!this.authenticated) {
      throw new Error('Not authenticated. Call login() first or provide API key.');
    }

    return this.http.request<T>(method, endpoint, data);
  }

  /**
   * List all sites on this controller
   */
  public async listSites(): Promise<INetworkSite[]> {
    logger.log('debug', 'Fetching sites');

    const response = await this.request<IUnifiApiResponse<INetworkSite>>(
      'GET',
      '/api/self/sites'
    );

    return response.data || [];
  }

  /**
   * Get system info
   */
  public async getSystemInfo(): Promise<unknown> {
    return this.request('GET', '/api/s/default/stat/sysinfo');
  }

  /**
   * Get controller health
   */
  public async getHealth(siteId: string = 'default'): Promise<unknown> {
    return this.request('GET', `/api/s/${siteId}/stat/health`);
  }

  /**
   * Get active alerts
   */
  public async getAlerts(siteId: string = 'default'): Promise<unknown> {
    return this.request('GET', `/api/s/${siteId}/stat/alarm`);
  }

  /**
   * Get events
   */
  public async getEvents(
    siteId: string = 'default',
    options: { start?: number; end?: number; limit?: number } = {}
  ): Promise<unknown> {
    const params = new URLSearchParams();
    if (options.start) params.append('start', options.start.toString());
    if (options.end) params.append('end', options.end.toString());
    if (options.limit) params.append('_limit', options.limit.toString());

    const queryString = params.toString() ? `?${params.toString()}` : '';
    return this.request('GET', `/api/s/${siteId}/stat/event${queryString}`);
  }

  /**
   * Get WLAN configurations
   */
  public async getWlans(siteId: string = 'default'): Promise<unknown> {
    return this.request('GET', `/api/s/${siteId}/rest/wlanconf`);
  }

  /**
   * Get network configurations
   */
  public async getNetworks(siteId: string = 'default'): Promise<unknown> {
    return this.request('GET', `/api/s/${siteId}/rest/networkconf`);
  }

  /**
   * Get port forward rules
   */
  public async getPortForwards(siteId: string = 'default'): Promise<unknown> {
    return this.request('GET', `/api/s/${siteId}/rest/portforward`);
  }

  /**
   * Get firewall rules
   */
  public async getFirewallRules(siteId: string = 'default'): Promise<unknown> {
    return this.request('GET', `/api/s/${siteId}/rest/firewallrule`);
  }

  /**
   * Get DPI stats
   */
  public async getDpiStats(siteId: string = 'default'): Promise<unknown> {
    return this.request('GET', `/api/s/${siteId}/stat/dpi`);
  }

  /**
   * Backup the controller configuration
   */
  public async createBackup(siteId: string = 'default'): Promise<unknown> {
    return this.request('POST', `/api/s/${siteId}/cmd/backup`, {
      cmd: 'backup',
    });
  }

  /**
   * Get devices (convenience method)
   */
  public async getDevices(siteId: string = 'default') {
    return this.deviceManager.listDevices(siteId);
  }

  /**
   * Get active clients (convenience method)
   */
  public async getClients(siteId: string = 'default') {
    return this.clientManager.listActiveClients(siteId);
  }
}