!/usr/bin/env node

var path = require(‘path’),

fs = require('fs'),
sys = require('util'),
os = require('os'),
mkdirp;

var less = require(‘../lib/less’); var args = process.argv.slice(1); var options = {

depends: false,
compress: false,
cleancss: false,
max_line_len: -1,
optimization: 1,
silent: false,
verbose: false,
lint: false,
paths: [],
color: true,
strictImports: false,
insecure: false,
rootpath: '',
relativeUrls: false,
ieCompat: true,
strictMath: false,
strictUnits: false,
globalVariables: '',
modifyVariables: '',
urlArgs: ''

}; var cleancssOptions = {}; var continueProcessing = true,

currentErrorcode;

// calling process.exit does not flush stdout always // so use this to set the exit code process.on(‘exit’, function() { process.reallyExit(currentErrorcode) });

var checkArgFunc = function(arg, option) {

if (!option) {
    console.log(arg + " option requires a parameter");
    continueProcessing = false;
    return false;
}
return true;

};

var checkBooleanArg = function(arg) {

var onOff = /^((on|t|true|y|yes)|(off|f|false|n|no))$/i.exec(arg);
if (!onOff) {
    console.log(" unable to parse "+arg+" as a boolean. use one of on/t/true/y/yes/off/f/false/n/no");
    continueProcessing = false;
    return false;
}
return Boolean(onOff[2]);

};

var parseVariableOption = function(option) {

var parts = option.split('=', 2);
return '@' + parts[0] + ': ' + parts[1] + ';\n';

};

var warningMessages = “”; var sourceMapFileInline = false;

args = args.filter(function (arg) {

var match;

if (match = arg.match(/^-I(.+)$/)) {
    options.paths.push(match[1]);
    return false;
}

if (match = arg.match(/^--?([a-z][0-9a-z-]*)(?:=(.*))?$/i)) { arg = match[1] }
else { return arg }

switch (arg) {
    case 'v':
    case 'version':
        console.log("lessc " + less.version.join('.') + " (LESS Compiler) [JavaScript]");
        continueProcessing = false;
    case 'verbose':
        options.verbose = true;
        break;
    case 's':
    case 'silent':
        options.silent = true;
        break;
    case 'l':
    case 'lint':
        options.lint = true;
        break;
    case 'strict-imports':
        options.strictImports = true;
        break;
    case 'h':
    case 'help':
        require('../lib/less/lessc_helper').printUsage();
        continueProcessing = false;
    case 'x':
    case 'compress':
        options.compress = true;
        break;
    case 'insecure':
        options.insecure = true;
        break;
    case 'M':
    case 'depends':
        options.depends = true;
        break;
    case 'yui-compress':
        warningMessages += "yui-compress option has been removed. ignoring.";
        break;
    case 'clean-css':
        options.cleancss = true;
        break;
    case 'max-line-len':
        if (checkArgFunc(arg, match[2])) {
            options.maxLineLen = parseInt(match[2], 10);
            if (options.maxLineLen <= 0) {
              options.maxLineLen = -1;
            }
        }
        break;
    case 'no-color':
        options.color = false;
        break;
    case 'no-ie-compat':
        options.ieCompat = false;
        break;
    case 'no-js':
        options.javascriptEnabled = false;
        break;
    case 'include-path':
        if (checkArgFunc(arg, match[2])) {
            options.paths = match[2].split(os.type().match(/Windows/) ? ';' : ':')
                .map(function(p) {
                    if (p) {
                        return path.resolve(process.cwd(), p);
                    }
                });
        }
        break;
    case 'O0': options.optimization = 0; break;
    case 'O1': options.optimization = 1; break;
    case 'O2': options.optimization = 2; break;
    case 'line-numbers':
        if (checkArgFunc(arg, match[2])) {
            options.dumpLineNumbers = match[2];
        }
        break;
    case 'source-map':
        if (!match[2]) {
            options.sourceMap = true;
        } else {
            options.sourceMap = match[2];
        }
        break;
    case 'source-map-rootpath':
        if (checkArgFunc(arg, match[2])) {
            options.sourceMapRootpath = match[2];
        }
        break;
    case 'source-map-basepath':
        if (checkArgFunc(arg, match[2])) {
            options.sourceMapBasepath = match[2];
        }
        break;
    case 'source-map-map-inline':
        sourceMapFileInline = true;
        options.sourceMap = true;
        break;
    case 'source-map-less-inline':
        options.outputSourceFiles = true;
        break;
    case 'source-map-url':
        if (checkArgFunc(arg, match[2])) {
            options.sourceMapURL = match[2];
        }
        break;
    case 'rp':
    case 'rootpath':
        if (checkArgFunc(arg, match[2])) {
            options.rootpath = match[2].replace(/\\/g, '/');
        }
        break;
    case "ru":
    case "relative-urls":
        options.relativeUrls = true;
        break;
    case "sm":
    case "strict-math":
        if (checkArgFunc(arg, match[2])) {
            options.strictMath = checkBooleanArg(match[2]);
        }
        break;
    case "su":
    case "strict-units":
        if (checkArgFunc(arg, match[2])) {
            options.strictUnits = checkBooleanArg(match[2]);
        }
        break;
    case "global-var":
        if (checkArgFunc(arg, match[2])) {
            options.globalVariables += parseVariableOption(match[2]);
        }
        break;
    case "modify-var":
        if (checkArgFunc(arg, match[2])) {
            options.modifyVariables += parseVariableOption(match[2]);
        }
        break;
    case "clean-option":
        var cleanOptionArgs = match[2].split(":");
        switch(cleanOptionArgs[0]) {
            case "--keep-line-breaks":
            case "-b":
                cleancssOptions.keepBreaks = true;
                break;
            case "--s0":
                cleancssOptions.keepSpecialComments = 0;
                break;
            case "--s1":
                cleancssOptions.keepSpecialComments = 1;
                break;
            case "--skip-advanced":
                cleancssOptions.noAdvanced = true;
                break;
            case "--advanced":
                cleancssOptions.noAdvanced = false;
                break;
            case "--compatibility":
                cleancssOptions.compatibility = cleanOptionArgs[1];
                break;
            default:
                console.log("unrecognised clean-css option '" + cleanOptionArgs[0] + "'");
                console.log("we support only arguments that make sense for less, '--keep-line-breaks', '-b'");
                console.log("'--s0', '--s1', '--advanced', '--skip-advanced', '--compatibility'");
                continueProcessing = false;
                currentErrorcode = 1;
                break;
        }
        break;
    case 'url-args':
        if (checkArgFunc(arg, match[2])) {
            options.urlArgs = match[2];
        }
        break;
    default:
        require('../lib/less/lessc_helper').printUsage();
        continueProcessing = false;
        currentErrorcode = 1;
        break;
}

});

if (!continueProcessing) {

return;

}

var input = args; var inputbase = args; if (input && input != ‘-’) {

input = path.resolve(process.cwd(), input);

} var output = args; var outputbase = args; if (output) {

options.sourceMapOutputFilename = output;
output = path.resolve(process.cwd(), output);
if (warningMessages) {
    console.log(warningMessages);
}

}

options.sourceMapBasepath = options.sourceMapBasepath || (input ? path.dirname(input) : process.cwd());

if (options.sourceMap === true) {

if (!output && !sourceMapFileInline) {
    console.log("the sourcemap option only has an optional filename if the css filename is given");
    return;
}
options.sourceMapFullFilename = options.sourceMapOutputFilename + ".map";
options.sourceMap = path.basename(options.sourceMapFullFilename);

}

if (options.cleancss && options.sourceMap) {

console.log("the sourcemap option is not compatible with sourcemap support at the moment. See Issue #1656");
return;

}

if (! input) {

console.log("lessc: no input files");
console.log("");
require('../lib/less/lessc_helper').printUsage();
currentErrorcode = 1;
return;

}

var ensureDirectory = function (filepath) {

var dir = path.dirname(filepath),
    cmd,
    existsSync = fs.existsSync || path.existsSync;
if (!existsSync(dir)) {
    if (mkdirp === undefined) {
        try {mkdirp = require('mkdirp');}
        catch(e) { mkdirp = null; }
    }
    cmd = mkdirp && mkdirp.sync || fs.mkdirSync;
    cmd(dir);
}

};

if (options.depends) {

if (!outputbase) {
    sys.print("option --depends requires an output path to be specified");
    return;
}
sys.print(outputbase + ": ");

}

if (!sourceMapFileInline) {

var writeSourceMap = function(output) {
    var filename = options.sourceMapFullFilename || options.sourceMap;
    ensureDirectory(filename);
    fs.writeFileSync(filename, output, 'utf8');
};

}

var parseLessFile = function (e, data) {

if (e) {
    console.log("lessc: " + e.message);
    currentErrorcode = 1;
    return;
}

data = options.globalVariables + data + options.modifyVariables;

options.paths = [path.dirname(input)].concat(options.paths);
options.filename = input;

var parser = new(less.Parser)(options);
parser.parse(data, function (err, tree) {
    if (err) {
        less.writeError(err, options);
        currentErrorcode = 1;
        return;
    } else if (options.depends) {
        for(var file in parser.imports.files) {
            sys.print(file + " ")
        }
        sys.print("\n");
    } else {
        try {
            if (options.lint) { writeSourceMap = function() {} }
            var css = tree.toCSS({
                silent: options.silent,
                verbose: options.verbose,
                ieCompat: options.ieCompat,
                compress: options.compress,
                cleancss: options.cleancss,
                cleancssOptions: cleancssOptions,
                sourceMap: Boolean(options.sourceMap),
                sourceMapFilename: options.sourceMap,
                sourceMapURL: options.sourceMapURL,
                sourceMapOutputFilename: options.sourceMapOutputFilename,
                sourceMapBasepath: options.sourceMapBasepath,
                sourceMapRootpath: options.sourceMapRootpath || "",
                outputSourceFiles: options.outputSourceFiles,
                writeSourceMap: writeSourceMap,
                maxLineLen: options.maxLineLen,
                strictMath: options.strictMath,
                strictUnits: options.strictUnits,
                urlArgs: options.urlArgs
            });
            if(!options.lint) {
                if (output) {
                    ensureDirectory(output);
                    fs.writeFileSync(output, css, 'utf8');
                    if (options.verbose) {
                        console.log('lessc: wrote ' + output);
                    }
                } else {
                    sys.print(css);
                }
            }
        } catch (e) {
            less.writeError(e, options);
            currentErrorcode = 2;
            return;
        }
    }
});

};

if (input != ‘-’) {

fs.readFile(input, 'utf8', parseLessFile);

} else {

process.stdin.resume();
process.stdin.setEncoding('utf8');

var buffer = '';
process.stdin.on('data', function(data) {
    buffer += data;
});

process.stdin.on('end', function() {
    parseLessFile(false, buffer);
});

}