import { describe, expect, it } from 'vitest';
import { assignedReportObjects, readStaticReportObject, STATIC_REPORT_LIMITS } from '../../src/importers/static-report-literal';

describe('inert static report data grammar', () => {
  it('reads JSON and minified literal values without interpreting code', () => {
    const source = '{ title: "a\\n\\u00e4\\x21", nested: [true,false,null,!0,!1,-2,1.2e3,], text: `line1\r\nline2`, quoted: \'it\\\'s safe\', }';
    expect(readStaticReportObject(source, 0).value).toEqual({ title: 'a\nä!', nested: [true, false, null, true, false, -2, 1200], text: 'line1\nline2', quoted: "it's safe" });
  });

  it.each([
    '{a: execute()}', '{a: externalValue}', '{a: external.value}', '{a: new Date()}',
    '{get a(){return 1}}', '{["a"]:1}', '{...other}', '{a:`${execute()}`}',
    '{a:1,a:2}', '{a:1+2}', '{a:NaN}', '{a:Infinity}', '{a:1e999}', '{a:undefined}',
    '{a:()=>1}', '{a:1}.a', '{a:1}()', '{a:1} || other', '{a:[,1]}', '{a:"unterminated}',
    '{a:"\\uZZZZ"}', '{a:"\\1"}', '{a:/* missing */}', '{a:01}', '{a:!2}', '{a:!0+1}'
  ])('rejects executable or ambiguous input: %s', source => {
    expect(() => readStaticReportObject(source, 0)).toThrow(/static report data/);
  });

  it('preserves special keys as own inert data, without modifying prototypes', () => {
    const parsed = readStaticReportObject('{"__proto__":{"polluted":true},constructor:"source"}', 0).value;
    expect(Object.getPrototypeOf(parsed)).toBeNull();
    expect(Object.hasOwn(parsed, '__proto__')).toBe(true);
    expect(({} as Record<string, unknown>).polluted).toBeUndefined();
  });

  it('enforces nesting and string limits', () => {
    expect(() => readStaticReportObject('{a:' + '['.repeat(STATIC_REPORT_LIMITS.depth + 1) + '0' + ']'.repeat(STATIC_REPORT_LIMITS.depth + 1) + '}', 0)).toThrow();
    expect(() => readStaticReportObject('{a:"' + 'x'.repeat(STATIC_REPORT_LIMITS.string + 1) + '"}', 0)).toThrow();
  });

  it('ignores assignments inside strings, comments, templates and regular expressions', () => {
    const script = 'const text="fake={Tests:[]}"; /* fake={Tests:[]} */ const re=/fake={Tests:[]}/; const template=`fake={Tests:[]} ${`nested fake={Tests:[]}`}`; const first=1, real={Tests:[]};';
    expect([...assignedReportObjects(script)].map(item => item.binding)).toEqual(['real']);
  });

  it('bounds recursive template nesting while locating report assignments', () => {
    const script = 'const ignored=' + '`\u0024{'.repeat(STATIC_REPORT_LIMITS.depth + 1) + '0' + '}`'.repeat(STATIC_REPORT_LIMITS.depth + 1);
    expect(() => [...assignedReportObjects(script)]).toThrow(/nesting limit/);
  });
});