import assert from 'node:assert/strict';

import * as fs from 'node:fs';

import { getGlobalVariable } from '../../utils/env';

import { expectFileToExist } from '../../utils/fs';

import { ng } from '../../utils/process';

export default async function () {

const useWebpackBuilder = !getGlobalVariable('argv')['esbuild'];

// The below is needed to cache bundles and verify that sourcemaps are generated

// corretly when output-hashing is disabled.

await ng('build', '--output-hashing=bundles', '--source-map', '--configuration=development');

await ng('build', '--output-hashing=none', '--source-map');

await testForSourceMaps(useWebpackBuilder ? 2 : 1);

await ng('build', '--output-hashing=none', '--source-map', '--configuration=development');

await testForSourceMaps(useWebpackBuilder ? 3 : 1);

}

async function testForSourceMaps(expectedNumberOfFiles: number): Promise<void> {

await expectFileToExist('dist/test-project/browser/main.js.map');

const files = fs.readdirSync('./dist/test-project/browser');

let count = 0;

for (const file of files) {

if (!file.endsWith('.js')) {

continue;

}

++count;

assert(files.includes(file + '.map'), 'Sourcemap not generated for ' + file);

const content = fs.readFileSync('./dist/test-project/browser/' + file, 'utf8');

let lastLineIndex = content.lastIndexOf('\n');

if (lastLineIndex === content.length - 1) {

// Skip empty last line

lastLineIndex = content.lastIndexOf('\n', lastLineIndex - 1);

}

const comment = lastLineIndex !== -1 && content.slice(lastLineIndex).trim();

assert.equal(

comment,

`//# sourceMappingURL=${file}.map`,

'Sourcemap comment not generated for ' + file,

);

}

assert(

count >= expectedNumberOfFiles,

`Javascript file count is low. Expected ${expectedNumberOfFiles} but found ${count}`,

);

}