import assert from 'node:assert/strict';

import test from 'node:test';

import { createKernelProgressParser } from '../../shared/translation/kernel-progress.mjs';

test('kernel progress parser preserves stages without a measurable percentage', () => {

const progress = [];

const consume = createKernelProgressParser((value) => progress.push(value));

consume('PDFMATH_PROGRESS:{"stage":"Finalize PDF","completed":0,"total":1,"percent":null}\n');

assert.deepEqual(progress, [{ stage: 'Finalize PDF', completed: 0, total: 1, percent: null }]);

});

test('kernel progress parser joins split stdout chunks and ignores ordinary output', () => {

const progress = [];

const consume = createKernelProgressParser((value) => progress.push(value));

consume('worker output\nPDFMATH_PROGRESS:{"stage":"pages","completed":');

consume('2,"total":4,"percent":50}\r\nother output\n');

assert.deepEqual(progress, [{ stage: 'pages', completed: 2, total: 4, percent: 50 }]);

});

test('kernel progress parser drops malformed records and out-of-bounds values', () => {

const progress = [];

const consume = createKernelProgressParser((value) => progress.push(value));

consume(

[

'PDFMATH_PROGRESS:not-json',

'PDFMATH_PROGRESS:{"stage":"pages","completed":-1,"total":4,"percent":0}',

'PDFMATH_PROGRESS:{"stage":"pages","completed":5,"total":4,"percent":125}',

'PDFMATH_PROGRESS:{"stage":"pages","completed":1,"total":0,"percent":0}',

'PDFMATH_PROGRESS:{"stage":"pages","completed":1,"total":4,"percent":25}',

].join('\n') + '\n',

);

assert.deepEqual(progress, [{ stage: 'pages', completed: 1, total: 4, percent: 25 }]);

});

test('kernel progress parser accepts native fractional percent within bounds', () => {

const progress = [];

const consume = createKernelProgressParser((value) => progress.push(value));

consume('PDFMATH_PROGRESS:{"stage":"typeset","completed":3,"total":7,"percent":42.857}\n');

assert.equal(progress.length, 1);

assert.equal(progress[0].percent, 42.857);

});