/**
 * @file tool-guards.test.ts
 * @description Unit tests for the tool guard functions, which are responsible for enforcing configuration policies related to mutating and destructive tools. The tests cover scenarios where mutations and destructive actions are enabled or disabled in the configuration, as well as validating the confirmation token for destructive actions. The tests use Node's built-in test runner and assert module for assertions.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, it } from "node:test";
import assert from "node:assert/strict";
import { assertMutationsEnabled, assertDestructiveEnabled } from "../src/policy/tool-guards.js";
import type { AppConfig } from "../src/config/app-config.js";

function fakeConfig(overrides: Partial<AppConfig> = {}): AppConfig {
  return {
    serverName: "test",
    serverVersion: "1.0.0",
    dashboardBaseUrl: new URL("http://127.0.0.1:4820"),
    requestTimeoutMs: 10_000,
    retryCount: 2,
    retryBackoffMs: 250,
    allowMutations: false,
    allowDestructive: false,
    logLevel: "error",
    transport: "stdio",
    httpPort: 8819,
    httpHost: "127.0.0.1",
    ...overrides,
  };
}

describe("assertMutationsEnabled", () => {
  it("throws when mutations disabled", () => {
    assert.throws(
      () => assertMutationsEnabled(fakeConfig({ allowMutations: false })),
      /Mutating tools are disabled/
    );
  });

  it("does not throw when mutations enabled", () => {
    assert.doesNotThrow(() => assertMutationsEnabled(fakeConfig({ allowMutations: true })));
  });
});

describe("assertDestructiveEnabled", () => {
  it("throws when mutations disabled (even if destructive enabled)", () => {
    assert.throws(
      () =>
        assertDestructiveEnabled(
          fakeConfig({ allowMutations: false, allowDestructive: true }),
          "CLEAR_ALL_DATA"
        ),
      /Mutating tools are disabled/
    );
  });

  it("throws when destructive disabled", () => {
    assert.throws(
      () =>
        assertDestructiveEnabled(
          fakeConfig({ allowMutations: true, allowDestructive: false }),
          "CLEAR_ALL_DATA"
        ),
      /Destructive tools are disabled/
    );
  });

  it("throws on wrong confirmation token", () => {
    assert.throws(
      () =>
        assertDestructiveEnabled(
          fakeConfig({ allowMutations: true, allowDestructive: true }),
          "WRONG_TOKEN"
        ),
      /Invalid confirmation_token/
    );
  });

  it("passes with correct config and token", () => {
    assert.doesNotThrow(() =>
      assertDestructiveEnabled(
        fakeConfig({ allowMutations: true, allowDestructive: true }),
        "CLEAR_ALL_DATA"
      )
    );
  });
});