import { expect, test } from "@playwright/test";

import { evaluateParameterExpression } from "../../src/parameterExpression";

function expectExpressionValue(expression: string, expected: number) {
  const result = evaluateParameterExpression(expression);
  expect(result.ok, result.ok ? undefined : result.message).toBe(true);
  if (result.ok) {
    expect(result.value).toBeCloseTo(expected, 10);
  }
}

test("安全解析 AMESim 风格的算术、幂与科学计数等式", () => {
  expectExpressionValue("=3.14*10^2/4", 78.5);
  expectExpressionValue("(2+3)*4", 20);
  expectExpressionValue("2^3^2", 512);
  expectExpressionValue("-2^2", -4);
  expectExpressionValue("2.5E-3", 0.0025);
});

test("支持有限的数学常量与白名单函数", () => {
  expectExpressionValue("sqrt(16)+abs(-2)", 6);
  expectExpressionValue("sin(pi/2)+ln(e)", 2);
  expectExpressionValue("max(1, 5, 3)+pow(2, 3)", 13);
});

test("拒绝除零、非法定义域、未知变量和任意代码", () => {
  for (const expression of [
    "1/0",
    "sqrt(-1)",
    "unknown+1",
    "window.alert(1)",
    "1+*2",
    "1e309",
  ]) {
    const result = evaluateParameterExpression(expression);
    expect(result.ok, expression).toBe(false);
    if (!result.ok) {
      expect(result.message.length).toBeGreaterThan(0);
    }
  }
});