import { Global, Module } from "@nestjs/common";
import { PrismaService } from "./prisma.service.js";
import { RedisService } from "./redis.service.js";
import { EventBus } from "./event-bus.js";
import { AuditService } from "./audit.service.js";
import { EmailService } from "./email.service.js";
import { CacheService } from "./cache.js";
import { PermissionCacheBridge } from "./permission-cache-bridge.js";

/**
 * Global core services (TASK-0100 S0 — repo-wide DI fix).
 *
 * **Why this module exists.** Nest resolves plain `private readonly` ctor
 * injection against the *module's own scope*: a provider is injectable only if
 * it is declared (or imported/exported) in the same module, or provided by a
 * `@Global()` module. The five shared services used to be declared in the
 * root `AppModule` — which NO feature module imports — so:
 *
 *  - under the **tsc-compiled** runtime (metadata emitted), boot threw
 *    `Nest can't resolve dependencies of ...` for every feature service;
 *  - under **tsx / vitest** (esbuild: `design:paramtypes` is NEVER emitted —
 *    esbuild has no decorator-metadata support), boot "succeeded" and every
 *    plain-injected dependency resolved to `undefined`, surfacing as 500s at
 *    request time (e.g. login: `this.auth` undefined).
 *
 * **Fix (two halves, both required):**
 *  1. this `@Global()` module — makes the five services visible to every
 *     feature module without per-module imports (verified empirically: the
 *     plain-injection shape fails to boot without a global module, boots with
 *     one, under both tsc and tsx);
 *  2. explicit `@Inject(Token)` on every DI ctor param across the app —
 *     explicit tokens resolve under every transform (tsx, vitest, tsc)
 *     regardless of emitted metadata, so the app boots identically in dev,
 *     test and build runtimes.
 */
@Global()
@Module({
  providers: [PrismaService, RedisService, EventBus, AuditService, EmailService, CacheService, PermissionCacheBridge],
  exports: [PrismaService, RedisService, EventBus, AuditService, EmailService, CacheService]
})
export class CoreModule {}