refactor: Implement lazy initialization for Prisma client

- Introduced a lazy initialization function for the Prisma client to optimize resource usage by only initializing when first accessed.
- Enhanced error handling for parsing Prisma Postgres connection strings, providing clearer error messages and logging for debugging.
- Updated the export to use a Proxy for lazy loading, improving performance and maintaining the existing interface.

lib/prisma.ts

@@ -6,41 +6,61 @@ const globalForPrisma = globalThis as unknown as {
   prisma: PrismaClient | undefined
 }
 
-const connectionString = process.env.DATABASE_URL
-
-if (!connectionString) {
-  throw new Error('DATABASE_URL environment variable is not set')
-}
-
-// Handle Prisma Postgres URLs (prisma+postgres://) vs standard PostgreSQL URLs
-let pool: Pool
-if (connectionString.startsWith('prisma+postgres://')) {
-  // For Prisma managed Postgres, extract the actual postgres URL from the API key
-  try {
-    const urlMatch = connectionString.match(/api_key=([^"&]+)/)
-    if (urlMatch) {
-      const apiKey = decodeURIComponent(urlMatch[1])
-      const decoded = JSON.parse(Buffer.from(apiKey, 'base64').toString())
-      if (decoded.databaseUrl) {
-        pool = new Pool({ connectionString: decoded.databaseUrl })
-      } else if (decoded.shadowDatabaseUrl) {
-        pool = new Pool({ connectionString: decoded.shadowDatabaseUrl })
-      } else {
-        throw new Error('Could not extract database URL from Prisma Postgres connection string')
-      }
-    } else {
-      throw new Error('Invalid Prisma Postgres connection string format')
-    }
-  } catch (error) {
-    console.error('Error parsing Prisma Postgres URL:', error)
-    throw new Error('Failed to parse Prisma Postgres connection string. Consider using a standard PostgreSQL connection string.')
+// Lazy initialization function - only initializes when prisma is first accessed
+function getPrismaClient(): PrismaClient {
+  if (globalForPrisma.prisma) {
+    return globalForPrisma.prisma
   }
-} else {
-  // Standard PostgreSQL connection
-  pool = new Pool({ connectionString })
+
+  const connectionString = process.env.DATABASE_URL
+
+  if (!connectionString) {
+    throw new Error('DATABASE_URL environment variable is not set')
+  }
+
+  // Handle Prisma Postgres URLs (prisma+postgres://) vs standard PostgreSQL URLs
+  let pool: Pool
+  if (connectionString.startsWith('prisma+postgres://')) {
+    // For Prisma managed Postgres, extract the actual postgres URL from the API key
+    try {
+      const urlMatch = connectionString.match(/api_key=([^"&]+)/)
+      if (urlMatch) {
+        const apiKey = decodeURIComponent(urlMatch[1])
+        const decoded = JSON.parse(Buffer.from(apiKey, 'base64').toString())
+        if (decoded.databaseUrl) {
+          pool = new Pool({ connectionString: decoded.databaseUrl })
+        } else if (decoded.shadowDatabaseUrl) {
+          pool = new Pool({ connectionString: decoded.shadowDatabaseUrl })
+        } else {
+          throw new Error('Could not extract database URL from Prisma Postgres connection string')
+        }
+      } else {
+        throw new Error('Invalid Prisma Postgres connection string format')
+      }
+    } catch (error) {
+      console.error('Error parsing Prisma Postgres URL:', error)
+      throw new Error('Failed to parse Prisma Postgres connection string. Consider using a standard PostgreSQL connection string.')
+    }
+  } else {
+    // Standard PostgreSQL connection
+    pool = new Pool({ connectionString })
+  }
+
+  const adapter = new PrismaPg(pool)
+  const prisma = new PrismaClient({ adapter })
+
+  if (process.env.NODE_ENV !== 'production') {
+    globalForPrisma.prisma = prisma
+  }
+
+  return prisma
 }
 
-const adapter = new PrismaPg(pool)
-export const prisma = globalForPrisma.prisma ?? new PrismaClient({ adapter })
-
-if (process.env.NODE_ENV !== 'production') globalForPrisma.prisma = prisma
+// Export a proxy that lazily initializes Prisma on first access
+export const prisma = new Proxy({} as PrismaClient, {
+  get(_target, prop) {
+    const client = getPrismaClient()
+    const value = (client as any)[prop]
+    return typeof value === 'function' ? value.bind(client) : value
+  }
+})