import { smartlog, smartrequest } from './plugins.js';
import {
  type IPeeringDbResponse,
  type THttpMethod,
  type IQueryOptions,
} from './peeringdb.types.js';

// Import manager classes (will be created next)
import { OrganizationManager } from './peeringdb.classes.organizationmanager.js';
import { NetworkManager } from './peeringdb.classes.networkmanager.js';
import { FacilityManager } from './peeringdb.classes.facilitymanager.js';
import { ExchangeManager } from './peeringdb.classes.exchangemanager.js';
import { NetIxLanManager } from './peeringdb.classes.netixlanmanager.js';
import { NetFacManager } from './peeringdb.classes.netfacmanager.js';
import { IxLanManager } from './peeringdb.classes.ixlanmanager.js';
import { IxFacManager } from './peeringdb.classes.ixfacmanager.js';
import { IxPfxManager } from './peeringdb.classes.ixpfxmanager.js';
import { PocManager } from './peeringdb.classes.pocmanager.js';

/**
 * PeeringDB API Client
 * Provides access to the PeeringDB API using native fetch
 */
export class PeeringDbClient {
  private apiKey: string | null = null;
  private baseUrl: string = 'https://www.peeringdb.com/api';
  private logger: smartlog.Smartlog;

  // Manager instances
  public organizations: OrganizationManager;
  public networks: NetworkManager;
  public facilities: FacilityManager;
  public exchanges: ExchangeManager;
  public netIxLans: NetIxLanManager;
  public netFacs: NetFacManager;
  public ixLans: IxLanManager;
  public ixFacs: IxFacManager;
  public ixPfxs: IxPfxManager;
  public pocs: PocManager;

  /**
   * Create a new PeeringDB API client
   * @param apiKey Optional API key for authenticated requests
   */
  constructor(apiKey?: string) {
    this.apiKey = apiKey || null;
    this.logger = new smartlog.Smartlog({
      logContext: {
        company: 'Task Venture Capital',
        companyunit: '@apiclient.xyz/peeringdb',
        containerName: 'PeeringDbClient',
      },
    });

    // Initialize managers
    this.organizations = new OrganizationManager(this);
    this.networks = new NetworkManager(this);
    this.facilities = new FacilityManager(this);
    this.exchanges = new ExchangeManager(this);
    this.netIxLans = new NetIxLanManager(this);
    this.netFacs = new NetFacManager(this);
    this.ixLans = new IxLanManager(this);
    this.ixFacs = new IxFacManager(this);
    this.ixPfxs = new IxPfxManager(this);
    this.pocs = new PocManager(this);
  }

  /**
   * Make a request to the PeeringDB API
   * @param endpoint API endpoint (e.g., 'net', 'org', 'fac')
   * @param method HTTP method
   * @param options Query options and parameters
   * @param body Request body for POST/PUT/PATCH
   * @returns Array of results (unwrapped from meta wrapper)
   */
  public async request<T = any>(
    endpoint: string,
    method: THttpMethod = 'GET',
    options: IQueryOptions = {},
    body?: any
  ): Promise<T[]> {
    const url = this.buildUrl(endpoint, options);

    this.logger.log('info', `${method} ${url}`);

    // Build request using fluent API
    let requestClient = smartrequest.SmartRequestClient.create()
      .url(url)
      .header('Accept', 'application/json')
      .header('User-Agent', '@apiclient.xyz/peeringdb/1.0.1 (Node.js)')
      .retry(3); // Retry up to 3 times (handles 429)

    // Add API key if available
    if (this.apiKey) {
      requestClient = requestClient.header('Authorization', `Api-Key ${this.apiKey}`);
    }

    // Add body for POST/PUT/PATCH requests
    if (body && ['POST', 'PUT', 'PATCH'].includes(method)) {
      requestClient = requestClient.json(body);
    }

    try {
      // Execute the appropriate HTTP method
      let response;
      switch (method) {
        case 'GET':
          response = await requestClient.get();
          break;
        case 'POST':
          response = await requestClient.post();
          break;
        case 'PUT':
          response = await requestClient.put();
          break;
        case 'DELETE':
          response = await requestClient.delete();
          break;
        case 'PATCH':
          response = await requestClient.patch();
          break;
        default:
          throw new Error(`Unsupported HTTP method: ${method}`);
      }

      // Response body is automatically parsed as JSON by smartrequest
      const data: IPeeringDbResponse<T> = response.body;

      // Check meta status
      if (data?.meta?.status === 'error') {
        this.logger.log('error', `API returned error: ${data.meta.message}`);
        throw new Error(`PeeringDB API error: ${data.meta.message}`);
      }

      // Handle pagination if autoPaginate is enabled
      if (options.autoPaginate && data.data.length === (options.limit || 0)) {
        const allResults = [...data.data];
        let currentSkip = (options.skip || 0) + data.data.length;

        while (true) {
          const nextOptions = { ...options, skip: currentSkip };
          const nextUrl = this.buildUrl(endpoint, nextOptions);

          const nextResponse = await smartrequest.SmartRequestClient.create()
            .url(nextUrl)
            .header('Accept', 'application/json')
            .header('User-Agent', '@apiclient.xyz/peeringdb/1.0.1 (Node.js)')
            .header('Authorization', this.apiKey ? `Api-Key ${this.apiKey}` : '')
            .retry(3)
            .get();

          const nextData: IPeeringDbResponse<T> = nextResponse.body;

          if (nextData.data.length === 0) {
            break;
          }

          allResults.push(...nextData.data);
          currentSkip += nextData.data.length;

          // Safety check to prevent infinite loops
          if (nextData.data.length < (options.limit || 0)) {
            break;
          }
        }

        return allResults;
      }

      // Return unwrapped data array
      return data.data;
    } catch (error) {
      this.logger.log('error', `Request failed: ${error.message}`);
      throw error;
    }
  }

  /**
   * Build API URL with query parameters
   */
  private buildUrl(endpoint: string, options: IQueryOptions = {}): string {
    const url = new URL(`${this.baseUrl}/${endpoint}`);

    // Add standard query parameters
    if (options.limit !== undefined) {
      url.searchParams.set('limit', options.limit.toString());
    }

    if (options.skip !== undefined) {
      url.searchParams.set('skip', options.skip.toString());
    }

    if (options.fields) {
      url.searchParams.set('fields', options.fields);
    }

    if (options.depth !== undefined) {
      url.searchParams.set('depth', options.depth.toString());
    }

    if (options.since !== undefined) {
      url.searchParams.set('since', options.since.toString());
    }

    // Add any additional query parameters (field filters, etc.)
    Object.keys(options).forEach((key) => {
      if (
        !['limit', 'skip', 'fields', 'depth', 'since', 'autoPaginate'].includes(key)
      ) {
        const value = options[key];
        if (value !== undefined && value !== null) {
          url.searchParams.set(key, value.toString());
        }
      }
    });

    return url.toString();
  }

  /**
   * Convenience methods for common operations
   */
  public convenience = {
    /**
     * Get a network by ASN
     */
    getNetworkByAsn: async (asn: number) => {
      const results = await this.request('net', 'GET', { asn });
      return results[0] || null;
    },

    /**
     * Get an organization by ID
     */
    getOrganizationById: async (id: number) => {
      return this.organizations.getById(id);
    },

    /**
     * Get a facility by ID
     */
    getFacilityById: async (id: number) => {
      return this.facilities.getById(id);
    },

    /**
     * Get an exchange by ID
     */
    getExchangeById: async (id: number) => {
      return this.exchanges.getById(id);
    },

    /**
     * Search networks by name
     */
    searchNetworks: async (query: string) => {
      return this.request('net', 'GET', { name__contains: query });
    },

    /**
     * Search facilities by name
     */
    searchFacilities: async (query: string) => {
      return this.request('fac', 'GET', { name__contains: query });
    },

    /**
     * Get all facilities where a network is present
     */
    getNetworkFacilities: async (asn: number) => {
      const network = await this.convenience.getNetworkByAsn(asn);
      if (!network) {
        return [];
      }
      return this.request('netfac', 'GET', { net_id: network.id, depth: 2 });
    },

    /**
     * Get all exchanges where a network peers
     */
    getNetworkExchanges: async (asn: number) => {
      const network = await this.convenience.getNetworkByAsn(asn);
      if (!network) {
        return [];
      }
      return this.request('netixlan', 'GET', { net_id: network.id, depth: 2 });
    },

    /**
     * Get all networks present at a facility
     */
    getFacilityNetworks: async (facId: number) => {
      return this.request('netfac', 'GET', { fac_id: facId, depth: 2 });
    },
  };
}