/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import fs from 'fs';
import path from 'path';
import crypto from 'crypto';
const { dirs } = require('../../npm/dirs');

const ROOT = path.join(__dirname, '../../../');

const shasum = crypto.createHash('sha256');

// Add build configuration files
shasum.update(fs.readFileSync(path.join(ROOT, 'build/.cachesalt')));
shasum.update(fs.readFileSync(path.join(ROOT, '.npmrc')));
shasum.update(fs.readFileSync(path.join(ROOT, 'build', '.npmrc')));
shasum.update(fs.readFileSync(path.join(ROOT, 'remote', '.npmrc')));

// Add build scripts that could affect the build
const buildScripts = [
	'gulpfile.js',
	'build/gulpfile.js',
	'build/gulpfile.vscode.js',
	'build/lib/util.js'
];

for (const script of buildScripts) {
	try {
		const scriptPath = path.join(ROOT, script);
		if (fs.existsSync(scriptPath)) {
			shasum.update(fs.readFileSync(scriptPath));
		}
	} catch (err) {
		console.warn(`Warning: Could not read build script ${script}`);
	}
}

// Add package.json and package-lock.json files
for (const dir of dirs) {
	const packageJsonPath = path.join(ROOT, dir, 'package.json');
	const packageJson = JSON.parse(fs.readFileSync(packageJsonPath).toString());
	const relevantPackageJsonSections = {
		dependencies: packageJson.dependencies,
		devDependencies: packageJson.devDependencies,
		optionalDependencies: packageJson.optionalDependencies,
		resolutions: packageJson.resolutions,
		distro: packageJson.distro,
		scripts: packageJson.scripts // Include build scripts
	};
	shasum.update(JSON.stringify(relevantPackageJsonSections));

	const packageLockPath = path.join(ROOT, dir, 'package-lock.json');
	shasum.update(fs.readFileSync(packageLockPath));
}

// Add environment variables that could affect the build
const relevantEnvVars = [
	'VSCODE_QUALITY',
	'VSCODE_BUILD_STAGE',
	'VSCODE_BUILD_ARCH',
	'ENABLE_EXTENSIONS'
];

for (const envVar of relevantEnvVars) {
	if (process.env[envVar]) {
		shasum.update(envVar + '=' + process.env[envVar]);
	}
}

// Add any other command line arguments
for (let i = 2; i < process.argv.length; i++) {
	shasum.update(process.argv[i]);
}

process.stdout.write(shasum.digest('hex'));