import { ToolCapability } from '../../../types/mcp-config';

/**
 * @interface FirestoreConfig
 * @description Configuration for Google Cloud Firestore operations.
 */
export interface FirestoreConfig {
  projectID: string;
  // Add authentication details if needed
}

/**
 * @interface FirestoreOperations
 * @description Defines the operations available for Google Cloud Firestore.
 */
export interface FirestoreOperations {
  addDocument(collectionPath: string, documentData: { [key: string]: any }, documentId?: string): Promise<any>;
  getDocument(collectionPath: string, documentId: string): Promise<any | undefined>;
  updateDocument(collectionPath: string, documentId: string, updates: { [key: string]: any }): Promise<void>;
  deleteDocument(collectionPath: string, documentId: string): Promise<void>;
  queryCollection(collectionPath: string, queries?: { field: string, operator: string, value: any }[]): Promise<any[]>;
}

/**
 * @class FirestoreTool
 * @description Implements Google Cloud Firestore operations as an MCP tool.
 */
export class FirestoreTool implements FirestoreOperations {
  private config: FirestoreConfig;
  // Placeholder for Google Cloud Firestore client library
  // private firestoreClient: any;

  constructor(config: FirestoreConfig) {
    this.config = config;
    // Initialize Google Cloud Firestore client here
    // For now, it's a placeholder.
    console.log(`FirestoreTool initialized for project: ${config.projectID}`);
  }

  /**
   * Adds a document to a Firestore collection.
   * @param {string} collectionPath The path to the collection.
   * @param {object} documentData The data for the document.
   * @param {string} [documentId] Optional ID for the document. If not provided, Firestore generates one.
   * @returns {Promise<any>} The ID of the added document.
   */
  public async addDocument(collectionPath: string, documentData: { [key: string]: any }, documentId?: string): Promise<any> {
    console.log(`Adding document to Firestore collection ${collectionPath} in project ${this.config.projectID}`);
    // Placeholder for actual GCP Firestore client execution
    await new Promise(resolve => setTimeout(resolve, 300)); // Simulate network delay
    const newDocId = documentId || `simulated_doc_${Date.now()}`;
    const simulatedResult = { documentId: newDocId, data: documentData };
    console.log('Document added successfully (simulated).', simulatedResult);
    return simulatedResult;
  }

  /**
   * Retrieves a document from a Firestore collection.
   * @param {string} collectionPath The path to the collection.
   * @param {string} documentId The ID of the document to retrieve.
   * @returns {Promise<any | undefined>} The document data or undefined if not found.
   */
  public async getDocument(collectionPath: string, documentId: string): Promise<any | undefined> {
    console.log(`Getting document ${documentId} from Firestore collection ${collectionPath} in project ${this.config.projectID}`);
    // Placeholder for actual GCP Firestore client execution
    await new Promise(resolve => setTimeout(resolve, 200)); // Simulate network delay
    const simulatedData = { id: documentId, name: 'Simulated Item', value: Math.random() };
    console.log('Document retrieved successfully (simulated).', simulatedData);
    return simulatedData;
  }

  /**
   * Updates an existing document in a Firestore collection.
   * @param {string} collectionPath The path to the collection.
   * @param {string} documentId The ID of the document to update.
   * @param {object} updates The fields to update.
   * @returns {Promise<void>}
   */
  public async updateDocument(collectionPath: string, documentId: string, updates: { [key: string]: any }): Promise<void> {
    console.log(`Updating document ${documentId} in Firestore collection ${collectionPath} in project ${this.config.projectID}`);
    // Placeholder for actual GCP Firestore client execution
    await new Promise(resolve => setTimeout(resolve, 350)); // Simulate network delay
    console.log('Document updated successfully (simulated).', updates);
  }

  /**
   * Deletes a document from a Firestore collection.
   * @param {string} collectionPath The path to the collection.
   * @param {string} documentId The ID of the document to delete.
   * @returns {Promise<void>}
   */
  public async deleteDocument(collectionPath: string, documentId: string): Promise<void> {
    console.log(`Deleting document ${documentId} from Firestore collection ${collectionPath} in project ${this.config.projectID}`);
    // Placeholder for actual GCP Firestore client execution
    await new Promise(resolve => setTimeout(resolve, 250)); // Simulate network delay
    console.log('Document deleted successfully (simulated).');
  }

  /**
   * Queries a Firestore collection.
   * @param {string} collectionPath The path to the collection.
   * @param {object[]} [queries] Optional array of query conditions (e.g., [{ field: 'status', operator: '==', value: 'active' }]).
   * @returns {Promise<any[]>} A list of documents matching the query.
   */
  public async queryCollection(collectionPath: string, queries?: { field: string, operator: string, value: any }[]): Promise<any[]> {
    console.log(`Querying Firestore collection ${collectionPath} in project ${this.config.projectID} with queries:`, queries);
    // Placeholder for actual GCP Firestore client execution
    await new Promise(resolve => setTimeout(resolve, 400)); // Simulate network delay
    const simulatedResults = [
      { id: 'doc1', name: 'Query Result 1', status: 'active' },
      { id: 'doc2', name: 'Query Result 2', status: 'inactive' },
    ];
    console.log('Collection queried successfully (simulated).', simulatedResults);
    return simulatedResults;
  }

  /**
   * Returns the capabilities provided by this tool.
   * @returns {ToolCapability[]} An array of tool capabilities.
   */
  public static getCapabilities(): ToolCapability[] {
    return [
      { name: 'firestore_add_document', description: 'Adds a document to a Google Cloud Firestore collection.' },
      { name: 'firestore_get_document', description: 'Retrieves a document from a Google Cloud Firestore collection.' },
      { name: 'firestore_update_document', description: 'Updates an existing document in a Google Cloud Firestore collection.' },
      { name: 'firestore_delete_document', description: 'Deletes a document from a Google Cloud Firestore collection.' },
      { name: 'firestore_query_collection', description: 'Queries a Google Cloud Firestore collection.' },
    ];
  }
}