// packages/core-shared/src/instrumentation/di/bind-otel-instrumentation.ts
import type { Container } from "inversify";
import { OtelTracer } from "../otel/otel-tracer";
import { OtelLogger } from "../otel/otel-logger";
import { OtelMetrics } from "../otel/otel-metrics";
import { INSTRUMENTATION_SYMBOLS } from "../symbols";
import type { ITracer, ILogger, IMetrics } from "../index";

export type BindOtelOpts = {
  dsn: string;
  app: "web-next" | "cms" | "web-tanstack";
  release?: string;
};

/**
 * Binds OtelTracer, OtelLogger, and OtelMetrics to the DI container.
 *
 * NOTE: The OTel NodeSDK is NOT initialized here. It is initialized by each
 * app's instrumentation.ts `register()` hook (Next.js convention / server-entry
 * hook for TanStack) so that PII scrub processors are active before the very
 * first request handler runs — before bindAll() fires. Calling initOtelServerNode
 * here as well would create a second SDK init path and reintroduce the startup
 * window vulnerability (C1 fix).
 */
export function bindOtelInstrumentation(
  container: Container,
  // opts is accepted for API compatibility with call sites that still pass dsn + app.
  // The SDK is initialized by instrumentation.ts register() — no fields are used here.
  _opts: BindOtelOpts,
): { tracer: ITracer; logger: ILogger; metrics: IMetrics } {
  const tracer = new OtelTracer();
  const logger = new OtelLogger();
  const metrics = new OtelMetrics();

  if (container.isBound(INSTRUMENTATION_SYMBOLS.TRACER)) {
    container.unbind(INSTRUMENTATION_SYMBOLS.TRACER);
  }
  if (container.isBound(INSTRUMENTATION_SYMBOLS.LOGGER)) {
    container.unbind(INSTRUMENTATION_SYMBOLS.LOGGER);
  }
  if (container.isBound(INSTRUMENTATION_SYMBOLS.METRICS)) {
    container.unbind(INSTRUMENTATION_SYMBOLS.METRICS);
  }
  container.bind<ITracer>(INSTRUMENTATION_SYMBOLS.TRACER).toConstantValue(tracer);
  container.bind<ILogger>(INSTRUMENTATION_SYMBOLS.LOGGER).toConstantValue(logger);
  container.bind<IMetrics>(INSTRUMENTATION_SYMBOLS.METRICS).toConstantValue(metrics);
  return { tracer, logger, metrics };
}
