// SPDX-License-Identifier: LicenseRef-ConusAI-Template-1.0
// Retrieval is one platform service (ADR-061, RAG R9): the knowledge module's backend is the platform's
// knowledge service, an app keeps no vector store of its own, and a deployment that still names the old
// backend is told so by name instead of quietly getting another one.

import { readFileSync } from "node:fs"
import { KNOWLEDGE_BACKEND_VAR, KNOWLEDGE_BACKENDS, knowledgeBackendOf } from "@app/config"
import { describe, expect, it } from "vitest"

const read = (path: string): string => readFileSync(new URL(`../${path}`, import.meta.url), "utf8")

describe("the knowledge backend", () => {
  it("is the platform's by default", () => {
    expect(knowledgeBackendOf({})).toBe("platform")
    expect(knowledgeBackendOf({ KNOWLEDGE_BACKEND: "" })).toBe("platform")
    expect(knowledgeBackendOf({ KNOWLEDGE_BACKEND: " Platform " })).toBe("platform")
  })

  it("has no local backend to choose, and refuses the retired one by the variable's name", () => {
    expect(KNOWLEDGE_BACKENDS).toEqual(["platform"])
    expect(() => knowledgeBackendOf({ KNOWLEDGE_BACKEND: "vectors" })).toThrow(KNOWLEDGE_BACKEND_VAR)
  })

  it("leaves no vector store in the apps, their dependencies or the deployment contract", () => {
    for (const file of [
      "apps/web/src/server/ports.ts",
      "apps/worker/src/ports.ts",
      "apps/web/package.json",
      "apps/worker/package.json",
      "pnpm-workspace.yaml",
      "compose.dev.yaml",
      ".env.example",
    ]) {
      expect(read(file), file).not.toMatch(/qdrant|VECTOR_STORE|pgvector/i)
    }
  })
})