#!/usr/bin/env node

var path = require('path'),
    fs = require('fs'),
    sys = require('sys');

require.paths.unshift(path.join(__dirname, '..', 'lib'));

var mess = require('mess');
var args = process.argv.slice(1);
var options = {
    compress: false,
    optimization: 1,
    silent: false,
    json: false
};

args = args.filter(function (arg) {
    var match;

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

    switch (arg) {
        case 'v':
        case 'version':
            sys.puts("messc " + mess.version.join('.') + " (MESS Compiler) [JavaScript]");
            process.exit(0);
        case 'verbose':
            options.verbose = true;
            break;
        case 'j':
            options.json = true;
        case 's':
        case 'silent':
            options.silent = true;
            break;
        case 'h':
        case 'help':
            sys.puts("Usage: messc source");
            sys.puts("Options:");
            sys.puts("  -j\tParse JSON map manifest");
            process.exit(0);
        case 'x':
        case 'compress':
            options.compress = true;
            break;
        case 'O0': options.optimization = 0; break;
        case 'O1': options.optimization = 1; break;
        case 'O2': options.optimization = 2; break;
    }
});

var input = args[1];
if (input && input[0] != '/') {
    input = path.join(process.cwd(), input);
}
var output = args[2];
if (output && output[0] != '/') {
    output = path.join(process.cwd(), output);
}

if (! input) {
    sys.puts("messc: no input files");
    process.exit(1);
}

fs.readFile(input, 'utf-8', function (e, data) {
    if (e) {
        sys.puts("messc: " + e.message);
        process.exit(1);
    }

    if (options.json) {
        new(mess.Renderer)({
            paths: [path.dirname(input)],
            optimization: options.optimization,
            filename: input
        }).render(data, function (err, output) {
            if (err) {
                mess.writeError(err, options);
                process.exit(1);
            } else {
                sys.puts(output);
            }
        });
    } else {
        new(mess.Parser)({
            paths: [path.dirname(input)],
            optimization: options.optimization,
            filename: input
        }).parse(data, function (err, tree) {
            if (err) {
                less.writeError(err, options);
                process.exit(1);
            } else {
                try {
                    css = tree.toCSS({ compress: options.compress });
                    sys.print(css);
                } catch (e) {
                    less.writeError(e, options);
                    process.exit(2);
                }
            }
        });
    }
});