import { readFileSync } from "node:fs";
import assert from "node:assert/strict";
import { join } from "node:path";
import test from "node:test";

import { createOpenRouterProvider } from "../lib/ai/openrouter-provider";

const providerSource = readFileSync(
  join(process.cwd(), "lib", "ai", "openrouter-provider.ts"),
  "utf8",
);

test("provider reads OPENROUTER_API_KEY from environment and requires it", () => {
  assert.equal(
    /OPENROUTER_API_KEY/.test(providerSource),
    true,
    "Provider should read OPENROUTER_API_KEY.",
  );
  assert.equal(
    /OPENROUTER_APP_NAME/.test(providerSource),
    true,
    "Provider should include optional OPENROUTER_APP_NAME.",
  );
  assert.equal(
    /OPENROUTER_APP_URL/.test(providerSource),
    true,
    "Provider should include optional OPENROUTER_APP_URL.",
  );

  assert.throws(
    () =>
      createOpenRouterProvider({
        OPENROUTER_API_KEY: undefined,
        OPENROUTER_APP_NAME: "local-audit-tool",
        OPENROUTER_APP_URL: "https://example.local",
      }),
    /OPENROUTER_API_KEY is required/i,
  );
});

test("provider forwards optional app metadata to createOpenRouter call", () => {
  const provider = createOpenRouterProvider({
    OPENROUTER_API_KEY: "dummy-key",
    OPENROUTER_APP_NAME: "local-audit-tool",
    OPENROUTER_APP_URL: "https://example.local",
  });

  assert.equal(typeof provider, "function");
  assert.equal(provider !== null, true);
});