import { DnsRecord, Provider } from '@shared/schema';
import { DNSProvider } from './index';

interface Route53Credentials {
  accessKeyId: string;
  secretAccessKey: string;
  region?: string;
}

export class Route53Provider implements DNSProvider {
  name: string;
  type: string;
  private credentials: Route53Credentials | null = null;
  private isInitialized = false;

  constructor(provider: Provider) {
    this.name = provider.name;
    this.type = provider.type;
  }

  async initialize(credentials: Route53Credentials): Promise<boolean> {
    try {
      if (!credentials.accessKeyId || !credentials.secretAccessKey) {
        console.error('Missing required Route53 credentials');
        return false;
      }

      this.credentials = credentials;
      this.isInitialized = true;

      // Here you would typically verify credentials by making a test API call
      // Since AWS SDKs are not included and we're simulating, we'll assume success
      // In a real implementation, you would use the AWS SDK to verify credentials

      return true;
    } catch (error) {
      console.error('Error initializing Route53 provider:', error);
      return false;
    }
  }

  async getZones(): Promise<any[]> {
    try {
      if (!this.isInitialized) {
        throw new Error('Provider not initialized');
      }

      // In a real implementation, you would use the AWS SDK:
      // const route53 = new AWS.Route53({
      //   credentials: {
      //     accessKeyId: this.credentials.accessKeyId,
      //     secretAccessKey: this.credentials.secretAccessKey
      //   },
      //   region: this.credentials.region || 'us-east-1'
      // });
      // 
      // const hostedZones = await route53.listHostedZones({}).promise();
      // return hostedZones.HostedZones || [];

      console.log('Route53: Getting zones (simulated)');
      return [];
    } catch (error) {
      console.error('Error getting Route53 zones:', error);
      return [];
    }
  }

  async getZoneIdByName(domainName: string): Promise<string | null> {
    try {
      if (!this.isInitialized) {
        throw new Error('Provider not initialized');
      }

      // In a real implementation with AWS SDK:
      // const zones = await this.getZones();
      // const zone = zones.find(z => z.Name === domainName + '.' || z.Name === domainName);
      // return zone ? zone.Id.replace('/hostedzone/', '') : null;

      console.log(`Route53: Getting zone ID for domain ${domainName} (simulated)`);
      return null;
    } catch (error) {
      console.error(`Error getting Route53 zone ID for domain ${domainName}:`, error);
      return null;
    }
  }

  async getRecords(zoneId: string): Promise<any[]> {
    try {
      if (!this.isInitialized) {
        throw new Error('Provider not initialized');
      }

      // In a real implementation with AWS SDK:
      // const route53 = new AWS.Route53({
      //   credentials: {
      //     accessKeyId: this.credentials.accessKeyId,
      //     secretAccessKey: this.credentials.secretAccessKey
      //   },
      //   region: this.credentials.region || 'us-east-1'
      // });
      // 
      // const records = await route53.listResourceRecordSets({
      //   HostedZoneId: zoneId
      // }).promise();
      // 
      // return records.ResourceRecordSets || [];

      console.log(`Route53: Getting records for zone ${zoneId} (simulated)`);
      return [];
    } catch (error) {
      console.error(`Error getting Route53 records for zone ${zoneId}:`, error);
      return [];
    }
  }

  async createRecord(zoneId: string, record: Partial<DnsRecord>): Promise<any> {
    try {
      if (!this.isInitialized) {
        throw new Error('Provider not initialized');
      }

      // In a real implementation with AWS SDK:
      // const route53 = new AWS.Route53({
      //   credentials: {
      //     accessKeyId: this.credentials.accessKeyId,
      //     secretAccessKey: this.credentials.secretAccessKey
      //   },
      //   region: this.credentials.region || 'us-east-1'
      // });
      // 
      // const params = {
      //   HostedZoneId: zoneId,
      //   ChangeBatch: {
      //     Changes: [
      //       {
      //         Action: 'CREATE',
      //         ResourceRecordSet: {
      //           Name: record.name,
      //           Type: record.type,
      //           TTL: record.ttl || 3600,
      //           ResourceRecords: [
      //             {
      //               Value: record.content
      //             }
      //           ]
      //         }
      //       }
      //     ]
      //   }
      // };
      // 
      // if (record.type === 'MX' && record.priority) {
      //   params.ChangeBatch.Changes[0].ResourceRecordSet.ResourceRecords[0].Value = 
      //     `${record.priority} ${record.content}`;
      // }
      // 
      // const result = await route53.changeResourceRecordSets(params).promise();
      // return result;

      console.log(`Route53: Creating record in zone ${zoneId} (simulated)`, record);
      return { id: 'simulated-record-id' };
    } catch (error) {
      console.error(`Error creating Route53 record in zone ${zoneId}:`, error);
      throw error;
    }
  }

  async updateRecord(zoneId: string, recordId: string, record: Partial<DnsRecord>): Promise<any> {
    try {
      if (!this.isInitialized) {
        throw new Error('Provider not initialized');
      }

      // In Route53, update is done by deleting the old record and creating a new one
      // You would first need to get the current record to get its exact configuration
      // const oldRecord = await this.getRecordById(zoneId, recordId);
      // 
      // const route53 = new AWS.Route53({
      //   credentials: {
      //     accessKeyId: this.credentials.accessKeyId,
      //     secretAccessKey: this.credentials.secretAccessKey
      //   },
      //   region: this.credentials.region || 'us-east-1'
      // });
      // 
      // const params = {
      //   HostedZoneId: zoneId,
      //   ChangeBatch: {
      //     Changes: [
      //       {
      //         Action: 'DELETE',
      //         ResourceRecordSet: { /* old record configuration */ }
      //       },
      //       {
      //         Action: 'CREATE',
      //         ResourceRecordSet: {
      //           Name: record.name,
      //           Type: record.type,
      //           TTL: record.ttl || 3600,
      //           ResourceRecords: [
      //             {
      //               Value: record.content
      //             }
      //           ]
      //         }
      //       }
      //     ]
      //   }
      // };
      // 
      // const result = await route53.changeResourceRecordSets(params).promise();
      // return result;

      console.log(`Route53: Updating record ${recordId} in zone ${zoneId} (simulated)`, record);
      return { id: recordId };
    } catch (error) {
      console.error(`Error updating Route53 record ${recordId} in zone ${zoneId}:`, error);
      throw error;
    }
  }

  async deleteRecord(zoneId: string, recordId: string): Promise<boolean> {
    try {
      if (!this.isInitialized) {
        throw new Error('Provider not initialized');
      }

      // In Route53, you need the exact record configuration to delete it
      // const record = await this.getRecordById(zoneId, recordId);
      // 
      // const route53 = new AWS.Route53({
      //   credentials: {
      //     accessKeyId: this.credentials.accessKeyId,
      //     secretAccessKey: this.credentials.secretAccessKey
      //   },
      //   region: this.credentials.region || 'us-east-1'
      // });
      // 
      // const params = {
      //   HostedZoneId: zoneId,
      //   ChangeBatch: {
      //     Changes: [
      //       {
      //         Action: 'DELETE',
      //         ResourceRecordSet: { /* record configuration */ }
      //       }
      //     ]
      //   }
      // };
      // 
      // const result = await route53.changeResourceRecordSets(params).promise();
      // return !!result;

      console.log(`Route53: Deleting record ${recordId} in zone ${zoneId} (simulated)`);
      return true;
    } catch (error) {
      console.error(`Error deleting Route53 record ${recordId} in zone ${zoneId}:`, error);
      return false;
    }
  }

  // Helper method to get a specific record by ID (note: Route53 doesn't have record IDs in the same way as Cloudflare)
  private async getRecordById(zoneId: string, recordId: string): Promise<any> {
    // This is a simplified approach. In a real implementation, you would need to:
    // 1. Store the record name and type when creating it
    // 2. Use that info to identify the record in the list of records
    
    const records = await this.getRecords(zoneId);
    // In a real implementation, you would have a way to map recordId to the actual Route53 record
    return records.find(r => r.name === recordId); // This is not how it would work in practice
  }
}