import { describe, it, expect } from "vitest";
import path from "node:path";
import os from "node:os";
import fs from "node:fs";
import { parseManifestUseCases } from "./_manifest-ast.js";

function writeManifest(content) {
  const dir = fs.mkdtempSync(path.join(os.tmpdir(), "manifest-ast-"));
  const fp = path.join(dir, "feature.manifest.ts");
  fs.writeFileSync(fp, content);
  return fp;
}

describe("parseManifestUseCases", () => {
  it("returns an empty object for a manifest with no useCases", () => {
    const fp = writeManifest(`export const xManifest = defineFeature({
  name: "x",
  requiredCores: [],
  useCases: {},
  realtimeChannels: [],
  jobs: [],
} as const);`);
    expect(parseManifestUseCases(fp)).toEqual({});
  });

  it("extracts per-use-case publishes/audits/consumes arrays", () => {
    const fp = writeManifest(`export const authManifest = defineFeature({
  name: "auth",
  requiredCores: [],
  useCases: {
    signIn: { mutates: false, audits: [], publishes: [], consumes: [] },
    signUp: { mutates: true, audits: ["user.created"], publishes: ["auth.signed-up"], consumes: [] },
    signOut: { mutates: true, audits: ["session.ended"], publishes: [], consumes: [] },
  },
  realtimeChannels: [],
  jobs: [],
} as const);`);
    expect(parseManifestUseCases(fp)).toEqual({
      signIn: { mutates: false, audits: [], publishes: [], consumes: [] },
      signUp: { mutates: true, audits: ["user.created"], publishes: ["auth.signed-up"], consumes: [] },
      signOut: { mutates: true, audits: ["session.ended"], publishes: [], consumes: [] },
    });
  });

  it("returns null when file does not exist", () => {
    expect(parseManifestUseCases("/nonexistent/manifest.ts")).toBeNull();
  });

  it("returns null when the file has no defineFeature call", () => {
    const fp = writeManifest(`export const x = 1;`);
    expect(parseManifestUseCases(fp)).toBeNull();
  });
});