var path = require('path'),

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

var less = require('../lib/less');

less.tree.functions.add = function (a, b) {

return new(less.tree.Dimension)(a.value + b.value);

} less.tree.functions.increment = function (a) {

return new(less.tree.Dimension)(a.value + 1);

} less.tree.functions._color = function (str) {

if (str.value === "evil red") { return new(less.tree.Color)("600") }

}

sys.puts(“n” + stylize(“LESS”, 'underline') + “n”);

fs.readdirSync('test/less').forEach(function (file) {

if (! /\.less/.test(file)) { return }

toCSS('test/less/' + file, function (err, less) {
    var name = path.basename(file, '.less');

    fs.readFile(path.join('test/css', name) + '.css', 'utf-8', function (e, css) {
        sys.print("- " + name + ": ")
        if (less === css) { sys.print(stylize('OK', 'green')) }
        else if (err) {
            sys.print(stylize("ERROR: " + (err && err.message), 'red'));
        } else {
            sys.print(stylize("FAIL", 'yellow'));
        }
        sys.puts("");
    });
});

});

function toCSS(path, callback) {

var tree, css;
fs.readFile(path, 'utf-8', function (e, str) {
    if (e) { return callback(e) }

    new(less.Parser)({
        paths: [require('path').dirname(path)],
        optimization: 0
    }).parse(str, function (err, tree) {
        if (err) {
            callback(err);
        } else {
            try {
                css = tree.toCSS();
                callback(null, css);
            } catch (e) {
                callback(e);
            }
        }
    });
});

}

// Stylize a string function stylize(str, style) {

var styles = {
    'bold'      : [1,  22],
    'inverse'   : [7,  27],
    'underline' : [4,  24],
    'yellow'    : [33, 39],
    'green'     : [32, 39],
    'red'       : [31, 39]
};
return '\033[' + styles[style][0] + 'm' + str +
       '\033[' + styles[style][1] + 'm';

}