import { describe, it, expect } from 'vitest';
import { extractStepsBlock, parsePlanSteps } from './plan-steps-parse.mjs';

const good = [
  '# Plan', '```steps-json',
  '[{"op":"Edit","object":"app/Foo.php","ref":"dec-a"},',
  ' {"op":"Bash","object":"npm run build","ref":"dec-b"}]',
  '```',
].join('\n');

describe('plan-steps-parse', () => {
  it('extracts and parses valid steps', () => {
    const steps = parsePlanSteps(good);
    expect(steps).toHaveLength(2);
    expect(steps[0]).toMatchObject({ op: 'Edit', ref: 'dec-a' });
  });
  it('extractStepsBlock returns block body or null', () => {
    expect(extractStepsBlock(good)).toContain('app/Foo.php');
    expect(extractStepsBlock('# no block')).toBe(null);
  });
  it('canonicalizes file object to repo-relative POSIX (SE-5)', () => {
    const md = '```steps-json\n[{"op":"Write","object":"app\\\\Bar.php","ref":"r"}]\n```';
    expect(parsePlanSteps(md)[0].object).toBe('app/Bar.php');
  });
  it('rejects step without ref (SE-1) → throws', () => {
    const md = '```steps-json\n[{"op":"Edit","object":"x"}]\n```';
    expect(() => parsePlanSteps(md)).toThrow(/ref/);
  });
  it('rejects op:Task (VA-4, субагенты запрещены) → throws', () => {
    const md = '```steps-json\n[{"op":"Task","object":"coder","ref":"r"}]\n```';
    expect(() => parsePlanSteps(md)).toThrow(/Task/);
  });
  it('missing block → throws (fail-CLOSE)', () => {
    expect(() => parsePlanSteps('# Plan no block')).toThrow();
  });
  it('non-JSON block → throws', () => {
    expect(() => parsePlanSteps('```steps-json\nnot json\n```')).toThrow();
  });
});