#!/usr/bin/env node

/**
 * JavaScript Syntax Linter for Code Quality Checks
 *
 * This script checks JavaScript files for syntax errors using Babel parser
 * with support for decorators and modern JavaScript features.
 *
 * Usage: node js-linter.js <input-file>
 * Exit codes:
 *   0 - No syntax errors
 *   1 - Syntax error found
 */

const fs = require('fs');
const path = require('path');

// Resolve to system/node_modules since that's where packages are installed
const systemDir = path.resolve(__dirname, '..');
const babelParser = require(path.join(systemDir, 'node_modules', '@babel', 'parser'));

// Get input file from command line arguments
const inputFile = process.argv[2];

if (!inputFile) {
    console.error('Usage: node js-linter.js <input-file>');
    process.exit(1);
}

try {
    const code = fs.readFileSync(inputFile, 'utf8');

    // Parse the code to check for syntax errors
    // Babel parser supports decorators natively
    babelParser.parse(code, {
        sourceType: 'module',
        plugins: [
            'decorators-legacy',  // Support for @decorator syntax
            'classProperties',
            'classPrivateProperties',
            'classPrivateMethods',
            'optionalChaining',
            'nullishCoalescingOperator',
            'asyncGenerators',
            'bigInt',
            'dynamicImport',
            'exportDefaultFrom',
            'exportNamespaceFrom',
            'objectRestSpread',
            'topLevelAwait'
        ]
    });

    // Silent success - no output when no errors
    process.exit(0);

} catch (error) {
    // Output error information
    console.error('Syntax error: ' + error.message);
    if (error.loc) {
        console.error('Line: ' + error.loc.line);
        console.error('Column: ' + error.loc.column);
    }
    process.exit(1);
}