import { Logger } from '../../utils/logger';

/**
 * @interface DatabaseCoordinatorConfig
 * @description Configuration for the GCP Database Coordinator.
 */
export interface DatabaseCoordinatorConfig {
  projectID: string;
  cloudSQLInstance?: string;
  spannerInstance?: string;
  firestoreCollection?: string;
  bigQueryDataset?: string;
  bigtableInstance?: string;
  // Add authentication details if needed
}

/**
 * @interface DatabaseCoordinatorOperations
 * @description Defines operations for coordinating across GCP database services.
 */
export interface DatabaseCoordinatorOperations {
  syncAgentState(agentId: string, state: any): Promise<void>;
  getAgentCoordinationData(agentId: string): Promise<any>;
  logPerformanceMetrics(metrics: any): Promise<void>;
  runAnalyticsQuery(query: string): Promise<any>;
  storeHiveLog(logEntry: any): Promise<void>;
}

/**
 * @class DatabaseCoordinator
 * @description Orchestrates data operations across Google Cloud SQL, Cloud Spanner, Firestore, BigQuery, and Cloud Bigtable.
 */
export class DatabaseCoordinator implements DatabaseCoordinatorOperations {
  private config: DatabaseCoordinatorConfig;
  private logger: Logger;
  // Placeholders for GCP database clients
  // private cloudSqlClient: any;
  // private spannerClient: any;
  // private firestoreClient: any;
  // private bigQueryClient: any;
  // private bigtableClient: any;

  constructor(config: DatabaseCoordinatorConfig) {
    this.config = config;
    this.logger = new Logger('DatabaseCoordinator');
    this.logger.info('GCP Database Coordinator initialized.');
    // Initialize GCP database clients here (conceptual)
  }

  /**
   * Synchronizes agent state across relevant databases (e.g., Cloud SQL for primary state, Firestore for real-time updates).
   * @param {string} agentId The ID of the agent.
   * @param {any} state The agent's state to synchronize.
   * @returns {Promise<void>}
   */
  public async syncAgentState(agentId: string, state: any): Promise<void> {
    this.logger.info(`Syncing state for agent ${agentId} across GCP databases...`);
    // Simulate writes to Cloud SQL and Firestore
    await new Promise(resolve => setTimeout(resolve, 100)); // Simulate latency
    this.logger.debug(`Agent ${agentId} state synchronized:`, state);
  }

  /**
   * Retrieves agent coordination data from relevant databases (e.g., Cloud Spanner for global consistency).
   * @param {string} agentId The ID of the agent.
   * @returns {Promise<any>} The agent's coordination data.
   */
  public async getAgentCoordinationData(agentId: string): Promise<any> {
    this.logger.info(`Retrieving coordination data for agent ${agentId} from GCP databases...`);
    // Simulate read from Cloud Spanner
    await new Promise(resolve => setTimeout(resolve, 80)); // Simulate latency
    const data = { agentId, lastCoordination: Date.now(), status: 'active' };
    this.logger.debug(`Agent ${agentId} coordination data retrieved:`, data);
    return data;
  }

  /**
   * Logs performance metrics to a high-performance database (e.g., Cloud Bigtable).
   * @param {any} metrics The performance metrics to log.
   * @returns {Promise<void>}
   */
  public async logPerformanceMetrics(metrics: any): Promise<void> {
    this.logger.info('Logging performance metrics to Cloud Bigtable...', metrics);
    // Simulate write to Cloud Bigtable
    await new Promise(resolve => setTimeout(resolve, 50)); // Simulate latency
    this.logger.debug('Performance metrics logged.');
  }

  /**
   * Runs an analytics query on BigQuery.
   * @param {string} query The BigQuery SQL query.
   * @returns {Promise<any>} The query results.
   */
  public async runAnalyticsQuery(query: string): Promise<any> {
    this.logger.info(`Running analytics query on BigQuery: ${query}`);
    // Simulate BigQuery execution
    await new Promise(resolve => setTimeout(resolve, 500)); // Simulate query time
    const results = { query, data: [{ totalAgents: 100, avgLatency: 50 }] };
    this.logger.debug('Analytics query results:', results);
    return results;
  }

  /**
   * Stores hive-mind log entries.
   * @param {any} logEntry The log entry to store.
   * @returns {Promise<void>}
   */
  public async storeHiveLog(logEntry: any): Promise<void> {
    this.logger.info('Storing hive-mind log entry...', logEntry);
    // This could go to Cloud Logging, or a dedicated log table in BigQuery/Bigtable.
    await new Promise(resolve => setTimeout(resolve, 30));
    this.logger.debug('Hive log stored.');
  }
}