/**
 * Namecheap API Client - Domains DNS Module
 */
import { HttpClient } from './http-client.js';
import type {
  IDnsDomainHostsResponse,
  IDnsHost,
  IDnsSetHostsResponse,
  IDnsSetCustomResponse,
  IDnsGetEmailForwardingResponse,
  IDnsSetEmailForwardingResponse,
  IDnsGetListResponse,
  IDnsRecord
} from './types.js';

export class DomainsDns {
  private client: HttpClient;
  
  /**
   * Create a new Domains DNS API handler
   * @param client HTTP client instance
   */
  constructor(client: HttpClient) {
    this.client = client;
  }
  
  /**
   * Get a list of DNS hosts for a domain
   * @param domainName Domain name to get hosts for
   * @param sld Second-level domain (optional)
   * @param tld Top-level domain (optional)
   * @returns Array of DNS host records
   */
  async getHosts(domainName: string, sld?: string, tld?: string): Promise<IDnsHost[]> {
    // Prepare the request parameters
    const params: Record<string, string> = {};
    
    // If SLD and TLD are provided, use them instead of DomainName
    if (sld && tld) {
      params.SLD = sld;
      params.TLD = tld;
    } else {
      params.DomainName = domainName;
    }
    
    // Make the API request
    const response = await this.client.request<IDnsDomainHostsResponse>(
      'namecheap.domains.dns.getHosts',
      params
    );
    
    // Extract host records from the response
    const commandResponse = response.ApiResponse.CommandResponse[0];
    const hosts = commandResponse.DomainDNSGetHostsResult[0].host || [];
    
    // Convert the parsed XML structure to a more usable format
    return hosts.map(host => ({
      id: parseInt(host.$.HostId, 10),
      name: host.$.Name,
      type: host.$.Type,
      address: host.$.Address,
      mxPref: host.$.MXPref ? parseInt(host.$.MXPref, 10) : 0,
      ttl: parseInt(host.$.TTL, 10),
      isActive: host.$.IsActive?.toLowerCase() === 'true',
      isDDNSEnabled: host.$.IsDDNSEnabled?.toLowerCase() === 'true'
    }));
  }
  
  /**
   * Set DNS host records for a domain
   * @param domainName Domain name to set hosts for
   * @param hosts Array of host records to set
   * @param sld Second-level domain (optional)
   * @param tld Top-level domain (optional)
   * @returns Success status
   */
  async setHosts(
    domainName: string, 
    hosts: Array<{
      hostName: string;
      recordType: 'A' | 'AAAA' | 'CNAME' | 'MX' | 'TXT' | 'URL' | 'FRAME' | 'NS';
      address: string;
      mxPref?: number;
      ttl?: number;
    }>,
    sld?: string,
    tld?: string
  ): Promise<boolean> {
    // Prepare the request parameters
    const params: Record<string, string | number> = {};
    
    // If SLD and TLD are provided, use them instead of DomainName
    if (sld && tld) {
      params.SLD = sld;
      params.TLD = tld;
    } else {
      params.DomainName = domainName;
    }
    
    // Add host records to the parameters
    hosts.forEach((host, index) => {
      params[`HostName${index + 1}`] = host.hostName;
      params[`RecordType${index + 1}`] = host.recordType;
      params[`Address${index + 1}`] = host.address;
      
      if (host.mxPref !== undefined) {
        params[`MXPref${index + 1}`] = host.mxPref;
      }
      
      if (host.ttl !== undefined) {
        params[`TTL${index + 1}`] = host.ttl;
      }
    });
    
    // Make the API request
    const response = await this.client.request<IDnsSetHostsResponse>(
      'namecheap.domains.dns.setHosts',
      params
    );
    
    // Check if the operation was successful
    return response.ApiResponse.$.Status === 'OK';
  }
  
  /**
   * Set custom nameservers for a domain
   * @param domainName Domain name to set nameservers for
   * @param nameservers Array of nameserver hostnames
   * @param sld Second-level domain (optional)
   * @param tld Top-level domain (optional)
   * @returns Success status
   */
  async setCustom(
    domainName: string, 
    nameservers: string[],
    sld?: string,
    tld?: string
  ): Promise<boolean> {
    // Prepare the request parameters
    const params: Record<string, string> = {};
    
    // If SLD and TLD are provided, use them instead of DomainName
    if (sld && tld) {
      params.SLD = sld;
      params.TLD = tld;
    } else {
      params.DomainName = domainName;
    }
    
    // Add nameservers to the parameters
    params.Nameservers = nameservers.join(',');
    
    // Make the API request
    const response = await this.client.request<IDnsSetCustomResponse>(
      'namecheap.domains.dns.setCustom',
      params
    );
    
    // Check if the operation was successful
    return response.ApiResponse.$.Status === 'OK';
  }
  
  /**
   * Get email forwarding settings for a domain
   * @param domainName Domain name to get email forwarding for
   * @returns Email forwarding settings
   */
  async getEmailForwarding(domainName: string): Promise<Array<{
    from: string;
    to: string;
  }>> {
    // Make the API request
    const response = await this.client.request<IDnsGetEmailForwardingResponse>(
      'namecheap.domains.dns.getEmailForwarding',
      { DomainName: domainName }
    );
    
    // Extract email forwarding settings from the response
    const commandResponse = response.ApiResponse.CommandResponse[0];
    const forwardings = commandResponse.DomainDNSGetEmailForwardingResult[0].forward || [];
    
    // Convert the parsed XML structure to a more usable format
    return forwardings.map(forward => ({
      from: forward.$.from,
      to: forward.$.to
    }));
  }
  
  /**
   * Set email forwarding settings for a domain
   * @param domainName Domain name to set email forwarding for
   * @param forwardings Array of email forwarding settings
   * @returns Success status
   */
  async setEmailForwarding(
    domainName: string, 
    forwardings: Array<{
      from: string;
      to: string;
    }>
  ): Promise<boolean> {
    // Prepare the request parameters
    const params: Record<string, string> = {
      DomainName: domainName
    };
    
    // Add email forwarding settings to the parameters
    forwardings.forEach((forward, index) => {
      params[`MailBox${index + 1}`] = forward.from;
      params[`ForwardTo${index + 1}`] = forward.to;
    });
    
    // Make the API request
    const response = await this.client.request<IDnsSetEmailForwardingResponse>(
      'namecheap.domains.dns.setEmailForwarding',
      params
    );
    
    // Check if the operation was successful
    return response.ApiResponse.$.Status === 'OK';
  }
  
  /**
   * Get a list of DNS servers for a domain
   * @param sld Second-level domain
   * @param tld Top-level domain
   * @returns Array of DNS server names
   */
  async getList(sld: string, tld: string): Promise<string[]> {
    // Make the API request
    const response = await this.client.request<IDnsGetListResponse>(
      'namecheap.domains.dns.getList',
      {
        SLD: sld,
        TLD: tld
      }
    );
    
    // Extract DNS server list from the response
    const commandResponse = response.ApiResponse.CommandResponse[0];
    const dnsServers = commandResponse.DomainDNSGetListResult[0].Nameserver || [];
    
    return dnsServers;
  }
}