# All files / src/lib db.ts

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     /**
     * Unified storage interface - routes to IndexedDB or Flask based on configuration
     */

    import type { Snippet, Namespace } from './types';
    import { getStorageConfig, FlaskStorageAdapter } from './storage';
    import * as IndexedDBStorage from './indexeddb-storage';

    // Helper to get the active storage backend
    function getActiveStorage() {
      const config = getStorageConfig();

      if (config.backend === 'flask' && config.flaskUrl) {
        return new FlaskStorageAdapter(config.flaskUrl);
      }

      return null; // Use IndexedDB
    }

    // Snippet operations
    export async function getAllSnippets(): Promise<Snippet[]> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.getAllSnippets();
      }
      return await IndexedDBStorage.getAllSnippets();
    }

    export async function getSnippet(id: string): Promise<Snippet | null> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.getSnippet(id);
      }
      return await IndexedDBStorage.getSnippet(id);
    }

    export async function createSnippet(snippet: Snippet): Promise<void> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.createSnippet(snippet);
      }
      return await IndexedDBStorage.createSnippet(snippet);
    }

    export async function updateSnippet(snippet: Snippet): Promise<void> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.updateSnippet(snippet);
      }
      return await IndexedDBStorage.updateSnippet(snippet);
    }

    export async function deleteSnippet(id: string): Promise<void> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.deleteSnippet(id);
      }
      return await IndexedDBStorage.deleteSnippet(id);
    }

    export async function getSnippetsByNamespace(namespaceId: string): Promise<Snippet[]> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.getSnippetsByNamespace(namespaceId);
      }
      return await IndexedDBStorage.getSnippetsByNamespace(namespaceId);
    }

    export async function moveSnippetToNamespace(snippetId: string, namespaceId: string): Promise<void> {
      const snippet = await getSnippet(snippetId);
      if (!snippet) throw new Error('Snippet not found');

      snippet.namespaceId = namespaceId;
      snippet.updatedAt = Date.now();

      await updateSnippet(snippet);
    }

    export async function bulkMoveSnippets(snippetIds: string[], namespaceId: string): Promise<void> {
      for (const id of snippetIds) {
        await moveSnippetToNamespace(id, namespaceId);
      }
    }

    export async function getAllTemplates(): Promise<Snippet[]> {
      const snippets = await getAllSnippets();
      return snippets.filter(s => s.isTemplate);
    }

    export async function createTemplate(snippet: Omit<Snippet, 'id' | 'createdAt' | 'updatedAt'>): Promise<void> {
      const template: Snippet = {
        ...snippet,
        id: Date.now().toString(),
        createdAt: Date.now(),
        updatedAt: Date.now(),
        isTemplate: true,
      };
      await createSnippet(template);
    }

    export async function syncTemplatesFromJSON(templates: unknown[]): Promise<void> {
      // This would sync predefined templates - implement as needed
      console.log('Syncing templates', templates.length);
    }

    export async function seedDatabase(): Promise<void> {
      // Seed with default namespace if needed
      const namespaces = await getAllNamespaces();
      if (namespaces.length === 0) {
        await ensureDefaultNamespace();
      }
    }

    // Namespace operations
    export async function getAllNamespaces(): Promise<Namespace[]> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.getAllNamespaces();
      }
      return await IndexedDBStorage.getAllNamespaces();
    }

    export async function getNamespaceById(id: string): Promise<Namespace | null> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.getNamespace(id);
      }
      return await IndexedDBStorage.getNamespace(id);
    }

    export async function createNamespace(namespace: Namespace): Promise<void> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.createNamespace(namespace);
      }
      return await IndexedDBStorage.createNamespace(namespace);
    }

    export async function deleteNamespace(id: string): Promise<void> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.deleteNamespace(id);
      }
      return await IndexedDBStorage.deleteNamespace(id);
    }

    export async function ensureDefaultNamespace(): Promise<Namespace> {
      const namespaces = await getAllNamespaces();
      let defaultNs = namespaces.find(ns => ns.isDefault);

      if (!defaultNs) {
        defaultNs = {
          id: 'default',
          name: 'Default',
          createdAt: Date.now(),
          isDefault: true,
        };
        await createNamespace(defaultNs);
      }

      return defaultNs;
    }

    // Database operations
    export async function initDB(): Promise<void> {
      // Initialize IndexedDB or verify Flask connection
      const flask = getActiveStorage();
      if (flask) {
        const connected = await flask.testConnection();
        if (!connected) {
          throw new Error('Failed to connect to Flask backend');
        }
      } else {
        // Initialize IndexedDB
        await IndexedDBStorage.openDB();
      }

      // Ensure default namespace exists
      await ensureDefaultNamespace();
    }

    export async function clearDatabase(): Promise<void> {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.clearDatabase();
      }
      return await IndexedDBStorage.clearDatabase();
    }

    export async function getDatabaseStats() {
      const flask = getActiveStorage();
      if (flask) {
        return await flask.getStats();
      }
      return await IndexedDBStorage.getDatabaseStats();
    }

    export async function exportDatabase(): Promise<string> {
      const flask = getActiveStorage();
      if (flask) {
        const data = await flask.exportDatabase();
        return JSON.stringify(data, null, 2);
      }
      const data = await IndexedDBStorage.exportDatabase();
      return JSON.stringify(data, null, 2);
    }

    export async function importDatabase(jsonData: string): Promise<void> {
      const data = JSON.parse(jsonData);
      const flask = getActiveStorage();
      if (flask) {
        return await flask.importDatabase(data);
      }
      await IndexedDBStorage.importDatabase(data);
    }

    export function validateDatabaseSchema(): Promise<boolean> {
      // With IndexedDB, schema is always valid
      return Promise.resolve(true);
    }

    // For backward compatibility
    export const saveDB = async () => { /* No-op with IndexedDB */ };