#!/usr/bin/env node

// Compression helper for CodeMirror
//
// Example:
//
//   bin/compress codemirror runmode javascript xml
//
// Will take lib/codemirror.js, addon/runmode/runmode.js,
// mode/javascript/javascript.js, and mode/xml/xml.js, run them though
// the online minifier at http://marijnhaverbeke.nl/uglifyjs, and spit
// out the result.
//
//   bin/compress codemirror --local /path/to/bin/UglifyJS
//
// Will use a local minifier instead of the online default one.
//
// Script files are specified without .js ending. Prefixing them with
// their full (local) path is optional. So you may say lib/codemirror
// or mode/xml/xml to be more precise. In fact, even the .js suffix
// may be specified, if wanted.

"use strict";

var fs = require("fs");

function help(ok) {
  console.log("usage: " + process.argv[1] + " [--local /path/to/uglifyjs] files...");
  process.exit(ok ? 0 : 1);
}

var local = null, args = [], extraArgs = null, files = [], blob = "";

for (var i = 2; i < process.argv.length; ++i) {
  var arg = process.argv[i];
  if (arg == "--local" && i + 1 < process.argv.length) {
    var parts = process.argv[++i].split(/\s+/);
    local = parts[0];
    extraArgs = parts.slice(1);
    if (!extraArgs.length) extraArgs = ["-c", "-m"];
  } else if (arg == "--help") {
    help(true);
  } else if (arg[0] != "-") {
    files.push({name: arg, re: new RegExp("(?:\\/|^)" + arg + (/\.js$/.test(arg) ? "$" : "\\.js$"))});
  } else help(false);
}

function walk(dir) {
  fs.readdirSync(dir).forEach(function(fname) {
    if (/^[_\.]/.test(fname)) return;
    var file = dir + fname;
    if (fs.statSync(file).isDirectory()) return walk(file + "/");
    if (files.some(function(spec, i) {
      var match = spec.re.test(file);
      if (match) files.splice(i, 1);
      return match;
    })) {
      if (local) args.push(file);
      else blob += fs.readFileSync(file, "utf8");
    }
  });
}

walk("lib/");
walk("addon/");
walk("mode/");

if (!local && !blob) help(false);

if (files.length) {
  console.log("Some specified files were not found: " +
              files.map(function(a){return a.name;}).join(", "));
  process.exit(1);
}
  
if (local) {
  require("child_process").spawn(local, args.concat(extraArgs), {stdio: ["ignore", process.stdout, process.stderr]});
} else {
  var data = new Buffer("js_code=" + require("querystring").escape(blob), "utf8");
  var req = require("http").request({
    host: "marijnhaverbeke.nl",
    port: 80,
    method: "POST",
    path: "/uglifyjs",
    headers: {"content-type": "application/x-www-form-urlencoded",
              "content-length": data.length}
  });
  req.on("response", function(resp) {
    resp.on("data", function (chunk) { process.stdout.write(chunk); });
  });
  req.end(data);
}
