#!/usr/bin/env node

var PACKAGES = ['ams', 'cancel', 'color', 'euro', 'teubner', 'mathoid'];

var program = require('commander');
var util = require('util');

var json = require('../package.json');

program
    .version(json.version)
    .usage('[options] <tex input>')
    .option('--rebuild', 'Rebuild PEGjs grammar before parsing')
    .option('-v, --verbose', 'Show verbose error information')
    .option('--usemathrm', 'Use \\mathrm instead of \\mbox to escape some text literals')
    .option('--usemhchem', 'Allow commands from the mhchem package')
    .option('-D, --debug', 'Show stack trace on failure');

PACKAGES.forEach(function(pkg) {
    var msg = 'Fail validation if input requires the ';
    if (pkg === 'ams') {
        msg += 'ams* packages';
    } else {
        msg += pkg + ' package';
    }
    program.option('--no-'+pkg, msg);
});

program.parse(process.argv);

var input = program.args.join(' ');

if (program.rebuild) {
    require('../lib/build-parser');
}

var texvcjs = require('../');
var result = texvcjs.check(input, { debug: program.debug, usemathrm:program.usemathrm, usemhchem: program.usemhchem });

// check required packages
PACKAGES.forEach(function(pkg) {
    if (result[pkg+'_required'] && !program[pkg]) {
        result.status = 'F';
        result.details = result[pkg+'_required'];
    };
});

// output result
if (result.status === '+') {
    util.print(result.status + (result.output || ''));
} else if (result.status === 'F' || program.verbose) {
    util.print(result.status + (result.details || ''));
} else {
    util.print(result.status);
}
process.exit(result.status === '+' ? 0 : 1);