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started');\n *\n * // With metadata (Pino-style: object first, message second)\n * log.info({ userId: '123' }, 'User created');\n * // Output: {\"level\":\"info\",\"service\":\"my-service\",\"msg\":\"User created\",\"userId\":\"123\",\"traceId\":\"...\"}\n *\n * // Dynamic log level per-request\n * runWithLogLevel('debug', () => {\n * log.debug('This will log even if default level is \"info\"');\n * });\n * ```\n */\n\nimport {\n trace,\n context as api_context,\n createContextKey,\n} from '@opentelemetry/api';\nimport type { Logger } from './logger';\n\nexport type BuiltinLogLevel = 'debug' | 'info' | 'warn' | 'error' | 'none';\n\n/**\n * Context key for storing active log level (enables per-request log levels)\n */\nconst LOG_LEVEL_KEY = createContextKey('autotel-log-level');\n\n/**\n * Get the active log level from context (if set)\n * Falls back to undefined if no log level is set in context\n */\nexport function getActiveLogLevel(): BuiltinLogLevel | undefined {\n return api_context.active().getValue(LOG_LEVEL_KEY) as\n | BuiltinLogLevel\n | undefined;\n}\n\n/**\n * Run a function with a specific log level\n * The log level is stored in OpenTelemetry context and applies to all logger calls within the callback\n *\n * @example\n * ```typescript\n * // Enable debug logging for a specific request\n * runWithLogLevel('debug', () => {\n * log.debug('This will be logged');\n * processRequest();\n * });\n *\n * // Disable logging temporarily\n * runWithLogLevel('none', () => {\n * log.info('This will NOT be logged');\n * });\n * ```\n */\nexport function runWithLogLevel(\n level: BuiltinLogLevel,\n callback: () => T,\n): T {\n const ctx = api_context.active().setValue(LOG_LEVEL_KEY, level);\n return api_context.with(ctx, callback);\n}\n\n/**\n * Get current trace context from active span\n * Returns null if no active span exists\n */\nfunction getTraceContextInternal(): {\n traceId: string;\n spanId: string;\n correlationId: string;\n} | null {\n const span = 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String-only: logger.info('message')\n // 2. 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String-only: logger.error('message')\n // 2. Legacy: logger.error('message', error) - Error as second arg\n // 3. 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Option:** Don't provide a logger to `init()` and autotel uses\n * a built-in structured JSON logger with automatic trace context injection.\n *\n * **BYOL (Bring Your Own Logger):** Pass Pino or Bunyan to `init()` for\n * automatic instrumentation with trace context and OTLP log export.\n *\n * ## Logger Signature\n *\n * Autotel v2.10+ uses **Pino's signature**: `logger.info({ metadata }, 'message')`.\n *\n * ### Backward Compatibility\n *\n * The built-in logger auto-detects legacy Winston-style calls and swaps arguments:\n * ```typescript\n * // Legacy (auto-detected and handled)\n * logger.info('User created', { userId: '123' });\n * // → Internally treated as: logger.info({ userId: '123' }, 'User created')\n * // → Logs warning in development, works silently in production\n * ```\n *\n * ### Recommended Usage\n *\n * ```typescript\n * // ✅ Pino-style (preferred)\n * logger.info({ userId: '123' }, 'User created');\n *\n * // ✅ Simple message (no metadata)\n * logger.info('Server started');\n * ```\n *\n * **Note:** If you BYOL (bring your own logger), it must use Pino signature.\n * Winston and other `(message, meta)` loggers are NOT compatible.\n * For Winston, use `@opentelemetry/instrumentation-winston` instead.\n *\n * @example Zero-config (uses built-in logger)\n * ```typescript\n * import { init } from 'autotel';\n *\n * init({ service: 'my-app' });\n * // Internal logs: {\"level\":\"info\",\"service\":\"my-app\",\"msg\":\"...\",\"traceId\":\"...\"}\n * ```\n *\n * @example Using built-in logger directly\n * ```typescript\n * import { createBuiltinLogger, runWithLogLevel } from 'autotel/logger';\n *\n * const log = createBuiltinLogger('my-service');\n *\n * // Simple message (no metadata)\n * log.info('Server started');\n *\n * // With metadata (Pino-style: object first, message second)\n * log.info({ userId: '123' }, 'User created');\n * // Output: {\"level\":\"info\",\"service\":\"my-service\",\"msg\":\"User created\",\"userId\":\"123\",\"traceId\":\"...\"}\n *\n * // Dynamic log level per-request\n * runWithLogLevel('debug', () => {\n * log.debug('Debug info for this request only');\n * });\n * ```\n *\n * @example Using Pino (recommended for production, auto-instrumented)\n * ```typescript\n * import pino from 'pino'; // npm install pino\n * import { init } from 'autotel';\n *\n * const logger = pino({ level: 'info' });\n * init({ service: 'my-app', logger });\n *\n * // Logs automatically include traceId/spanId and export via OTLP!\n * logger.info({ userId: '123' }, 'User created');\n * ```\n *\n * @example Using Bunyan (auto-instrumented, same signature as Pino)\n * ```typescript\n * import bunyan from 'bunyan'; // npm install bunyan @opentelemetry/instrumentation-bunyan\n * import { init } from 'autotel';\n * import { BunyanInstrumentation } from '@opentelemetry/instrumentation-bunyan';\n *\n * const logger = bunyan.createLogger({ name: 'my-app' });\n * init({\n * service: 'my-app',\n * logger,\n * instrumentations: [new BunyanInstrumentation()]\n * });\n * ```\n *\n * @example Custom logger (MUST use Pino-compatible signature)\n * ```typescript\n * // ⚠️ Your custom logger MUST accept (object, message?) signature\n * const logger = {\n * info: (extra, msg) => console.log(msg || '', extra),\n * warn: (extra, msg) => console.warn(msg || '', extra),\n * error: (extra, msg) => console.error(msg || '', extra),\n * debug: (extra, msg) => console.debug(msg || '', extra),\n * };\n * init({ service: 'my-app', logger });\n * ```\n *\n * @example BYOL helper: inject trace context into any logger\n * ```typescript\n * import bunyan from 'bunyan';\n * import { getTraceContext } from 'autotel/logger';\n *\n * const bunyanLogger = bunyan.createLogger({ name: 'myapp' });\n * const ctx = getTraceContext();\n * bunyanLogger.info({ ...ctx, userId: '123' }, 'Creating user');\n * ```\n */\n\nimport { SpanStatusCode } from '@opentelemetry/api';\nimport { getConfig } from './config';\n\n// ============================================================================\n// Logger Types\n// ============================================================================\n\n/**\n * Log level constants\n */\nexport const LOG_LEVEL = {\n DEBUG: 'debug',\n INFO: 'info',\n WARN: 'warn',\n ERROR: 'error',\n} as const;\n\nexport type LogLevel = (typeof LOG_LEVEL)[keyof typeof LOG_LEVEL];\n\n/**\n * Logger configuration (for reference - not needed with BYOL approach)\n */\nexport interface LoggerConfig {\n service: string;\n level?: LogLevel;\n pretty?: boolean;\n redact?: string[] | false;\n}\n\n/**\n * Pino-compatible log function signature\n *\n * Matches Pino's actual LogFn type which supports:\n * - `(msg: string)` - simple string message\n * - `(obj: object, msg?: string)` - object first with optional message\n *\n * @example\n * ```typescript\n * logger.info('User logged in');\n * logger.info({ userId: '123' }, 'User created');\n * logger.error({ err: error }, 'Operation failed');\n * ```\n */\nexport interface LogFn {\n (msg: string): void;\n (obj: Record, msg?: string): void;\n}\n\n/**\n * Simple logger interface - Pino/Bunyan-compatible\n *\n * Uses Pino's LogFn signature which supports both:\n * - `logger.info('message')` - simple string message\n * - `logger.info({ extra }, 'message')` - object first with optional message\n *\n * This is compatible with Pino, Bunyan, and any logger following this pattern.\n *\n * @example Using Pino (just works!)\n * ```typescript\n * import pino from 'pino';\n * const logger = pino({ level: 'info' });\n * init({ service: 'my-app', logger });\n * ```\n *\n * @example Direct usage\n * ```typescript\n * logger.info('Simple message');\n * logger.info({ userId: '123' }, 'User created');\n * logger.error({ err: error }, 'Operation failed');\n * ```\n */\nexport interface Logger {\n info: LogFn;\n warn: LogFn;\n error: LogFn;\n debug: LogFn;\n}\n\n/**\n * Alias for Logger interface (backwards compatibility)\n * @deprecated Use Logger instead\n */\nexport type ILogger = Logger;\n\n/**\n * Pino logger type - re-exported for convenience\n *\n * Note: This is a type-only export. To use Pino, install it as a peer dependency:\n * `npm install pino`\n */\nexport type { Logger as PinoLogger } from 'pino';\n\n// ============================================================================\n// LoggedOperation Decorator\n// ============================================================================\n\nexport interface LoggedOperationOptions {\n /** Operation name for tracing (e.g., 'user.createUser') */\n operationName: string;\n}\n\n/**\n * TS5+ Standard Decorator for logging and tracing operations\n * Uses TC39 Stage 3 decorator syntax\n *\n * This is the traditional per-method decorator approach.\n * For zero-boilerplate solution, see @Instrumented class decorator.\n *\n * @example\n * // Simple usage (Pino-style: object first, message second)\n * class OrderService {\n * constructor(private readonly deps: { log: Logger }) {}\n *\n * @LoggedOperation('order.create')\n * async createOrder(data: CreateOrderData) {\n * // ✅ Correct Pino-style logging\n * this.deps.log.info({ orderId: data.id }, 'Creating order');\n * }\n * }\n *\n * // Advanced usage (future-proof for options)\n * @LoggedOperation({ operationName: 'order.create' })\n * async createOrder(data: CreateOrderData) { }\n */\nexport function LoggedOperation(\n operationNameOrOptions: string | LoggedOperationOptions,\n) {\n const operationName =\n typeof operationNameOrOptions === 'string'\n ? operationNameOrOptions\n : operationNameOrOptions.operationName;\n\n return function (\n originalMethod: (this: This, ...args: Args) => Promise,\n context: ClassMethodDecoratorContext<\n This,\n (this: This, ...args: Args) => Promise\n >,\n ) {\n const methodName = String(context.name);\n\n return async function (this: This, ...args: Args): Promise {\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n const log = (this as any).deps?.log;\n const startTime = performance.now();\n\n const config = getConfig();\n const tracer = config.tracer;\n\n return tracer.startActiveSpan(operationName, async (span) => {\n try {\n log?.info(\n {\n operation: operationName,\n method: methodName,\n args,\n },\n 'Operation started',\n );\n\n const result = await originalMethod.apply(this, args);\n\n const duration = performance.now() - startTime;\n log?.info(\n {\n operation: operationName,\n method: methodName,\n duration,\n },\n 'Operation completed',\n );\n\n span.setStatus({ code: SpanStatusCode.OK });\n span.setAttributes({\n 'operation.name': operationName,\n 'operation.method': methodName,\n 'operation.duration': duration,\n 'operation.success': true,\n });\n\n return result;\n } catch (error) {\n const duration = performance.now() - startTime;\n log?.error(\n {\n err: error instanceof Error ? error : undefined,\n operation: operationName,\n method: methodName,\n duration,\n },\n 'Operation failed',\n );\n\n span.setStatus({\n code: SpanStatusCode.ERROR,\n message: error instanceof Error ? error.message : 'Unknown error',\n });\n span.setAttributes({\n 'operation.name': operationName,\n 'operation.method': methodName,\n 'operation.duration': duration,\n 'operation.success': false,\n 'error.type':\n error instanceof Error ? error.constructor.name : 'Unknown',\n });\n\n throw error;\n } finally {\n span.end();\n }\n });\n };\n };\n}\n\n// ============================================================================\n// Built-in Logger (re-exports)\n// ============================================================================\n\nexport {\n autotelLogger,\n createBuiltinLogger,\n runWithLogLevel,\n getTraceContext,\n getActiveLogLevel,\n type BuiltinLogLevel,\n type BuiltinLoggerOptions,\n} from './autotel-logger';\n"]}