import { Client } from '@elastic/elasticsearch';

const ELASTICSEARCH_NODE = process.env.ELASTICSEARCH_NODE || 'http://localhost:9200';
const INDEX_NAME = 'hasher';

export const esClient = new Client({
  node: ELASTICSEARCH_NODE,
  requestTimeout: 30000,
  maxRetries: 3,
});

export const INDEX_MAPPING = {
  settings: {
    number_of_shards: 10,
    number_of_replicas: 1,
    analysis: {
      analyzer: {
        lowercase_analyzer: {
          type: 'custom' as const,
          tokenizer: 'keyword',
          filter: ['lowercase']
        }
      }
    }
  },
  mappings: {
    properties: {
      plaintext: {
        type: 'text' as const,
        analyzer: 'lowercase_analyzer',
        fields: {
          keyword: {
            type: 'keyword' as const
          }
        }
      },
      md5: {
        type: 'keyword' as const
      },
      sha1: {
        type: 'keyword' as const
      },
      sha256: {
        type: 'keyword' as const
      },
      sha512: {
        type: 'keyword' as const
      },
      bcrypt: {
        type: 'keyword' as const
      },
      created_at: {
        type: 'date' as const
      }
    }
  }
};

export async function initializeIndex(): Promise<void> {
  try {
    const indexExists = await esClient.indices.exists({ index: INDEX_NAME });
    
    if (!indexExists) {
      await esClient.indices.create({
        index: INDEX_NAME,
        settings: INDEX_MAPPING.settings,
        mappings: INDEX_MAPPING.mappings
      });
      console.log(`Index '${INDEX_NAME}' created successfully with 10 shards`);
    } else {
      console.log(`Index '${INDEX_NAME}' already exists`);
    }
  } catch (error) {
    console.error('Error initializing Elasticsearch index:', error);
    throw error;
  }
}

export { INDEX_NAME };