# All files / src/lib indexeddb-storage.ts

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     /**
     * IndexedDB Storage - Direct storage of snippets and namespaces
     */

    import type { Snippet, Namespace } from './types';

    const DB_NAME = 'codesnippet-db';
    const DB_VERSION = 2;
    const SNIPPETS_STORE = 'snippets';
    const NAMESPACES_STORE = 'namespaces';

    let dbInstance: IDBDatabase | null = null;

    export async function openDB(): Promise<IDBDatabase> {
      if (dbInstance) return dbInstance;

      return new Promise((resolve, reject) => {
        const request = indexedDB.open(DB_NAME, DB_VERSION);

        request.onerror = () => reject(request.error);

        request.onupgradeneeded = (event) => {
          const db = (event.target as IDBOpenDBRequest).result;

          // Create snippets store if it doesn't exist
          if (!db.objectStoreNames.contains(SNIPPETS_STORE)) {
            const snippetsStore = db.createObjectStore(SNIPPETS_STORE, { keyPath: 'id' });
            snippetsStore.createIndex('namespaceId', 'namespaceId', { unique: false });
            snippetsStore.createIndex('createdAt', 'createdAt', { unique: false });
          }

          // Create namespaces store if it doesn't exist
          if (!db.objectStoreNames.contains(NAMESPACES_STORE)) {
            db.createObjectStore(NAMESPACES_STORE, { keyPath: 'id' });
          }
        };

        request.onsuccess = () => {
          dbInstance = request.result;
          resolve(dbInstance);
        };
      });
    }

    // Snippet operations
    export async function getAllSnippets(): Promise<Snippet[]> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([SNIPPETS_STORE], 'readonly');
        const store = transaction.objectStore(SNIPPETS_STORE);
        const request = store.getAll();

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve(request.result);
      });
    }

    export async function getSnippet(id: string): Promise<Snippet | null> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([SNIPPETS_STORE], 'readonly');
        const store = transaction.objectStore(SNIPPETS_STORE);
        const request = store.get(id);

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve(request.result || null);
      });
    }

    export async function createSnippet(snippet: Snippet): Promise<void> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([SNIPPETS_STORE], 'readwrite');
        const store = transaction.objectStore(SNIPPETS_STORE);
        const request = store.add(snippet);

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve();
      });
    }

    export async function updateSnippet(snippet: Snippet): Promise<void> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([SNIPPETS_STORE], 'readwrite');
        const store = transaction.objectStore(SNIPPETS_STORE);
        const request = store.put(snippet);

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve();
      });
    }

    export async function deleteSnippet(id: string): Promise<void> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([SNIPPETS_STORE], 'readwrite');
        const store = transaction.objectStore(SNIPPETS_STORE);
        const request = store.delete(id);

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve();
      });
    }

    export async function getSnippetsByNamespace(namespaceId: string): Promise<Snippet[]> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([SNIPPETS_STORE], 'readonly');
        const store = transaction.objectStore(SNIPPETS_STORE);
        const index = store.index('namespaceId');
        const request = index.getAll(namespaceId);

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve(request.result);
      });
    }

    // Namespace operations
    export async function getAllNamespaces(): Promise<Namespace[]> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([NAMESPACES_STORE], 'readonly');
        const store = transaction.objectStore(NAMESPACES_STORE);
        const request = store.getAll();

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve(request.result);
      });
    }

    export async function getNamespace(id: string): Promise<Namespace | null> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([NAMESPACES_STORE], 'readonly');
        const store = transaction.objectStore(NAMESPACES_STORE);
        const request = store.get(id);

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve(request.result || null);
      });
    }

    export async function createNamespace(namespace: Namespace): Promise<void> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([NAMESPACES_STORE], 'readwrite');
        const store = transaction.objectStore(NAMESPACES_STORE);
        const request = store.add(namespace);

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve();
      });
    }

    export async function updateNamespace(namespace: Namespace): Promise<void> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([NAMESPACES_STORE], 'readwrite');
        const store = transaction.objectStore(NAMESPACES_STORE);
        const request = store.put(namespace);

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve();
      });
    }

    export async function deleteNamespace(id: string): Promise<void> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([NAMESPACES_STORE], 'readwrite');
        const store = transaction.objectStore(NAMESPACES_STORE);
        const request = store.delete(id);

        request.onerror = () => reject(request.error);
        request.onsuccess = () => resolve();
      });
    }

    // Database operations
    export async function clearDatabase(): Promise<void> {
      const db = await openDB();
      return new Promise((resolve, reject) => {
        const transaction = db.transaction([SNIPPETS_STORE, NAMESPACES_STORE], 'readwrite');

        const snippetsStore = transaction.objectStore(SNIPPETS_STORE);
        const namespacesStore = transaction.objectStore(NAMESPACES_STORE);

        snippetsStore.clear();
        namespacesStore.clear();

        transaction.onerror = () => reject(transaction.error);
        transaction.oncomplete = () => resolve();
      });
    }

    export async function getDatabaseStats() {
      const snippets = await getAllSnippets();
      const namespaces = await getAllNamespaces();
      const templates = snippets.filter(s => s.isTemplate);

      return {
        snippetCount: snippets.length,
        templateCount: templates.length,
        namespaceCount: namespaces.length,
        storageType: 'indexeddb' as const,
        databaseSize: 0, // IndexedDB doesn't provide easy size calculation
      };
    }

    // Export/Import
    export async function exportDatabase(): Promise<{ snippets: Snippet[]; namespaces: Namespace[] }> {
      const snippets = await getAllSnippets();
      const namespaces = await getAllNamespaces();
      return { snippets, namespaces };
    }

    export async function importDatabase(data: { snippets: Snippet[]; namespaces: Namespace[] }): Promise<void> {
      await clearDatabase();

      const db = await openDB();

      return new Promise((resolve, reject) => {
        const transaction = db.transaction([SNIPPETS_STORE, NAMESPACES_STORE], 'readwrite');
        const snippetsStore = transaction.objectStore(SNIPPETS_STORE);
        const namespacesStore = transaction.objectStore(NAMESPACES_STORE);

        // Import namespaces
        for (const namespace of data.namespaces) {
          namespacesStore.add(namespace);
        }

        // Import snippets
        for (const snippet of data.snippets) {
          snippetsStore.add(snippet);
        }

        transaction.onerror = () => reject(transaction.error);
        transaction.oncomplete = () => resolve();
      });
    }