#!/usr/bin/env node


// Remove any command line information before bower/rc/optimist are loaded and attempt to hijack
// our CLI args. This is a total hack but works around the issue described here:
//    https://github.com/bower/bower/issues/543
//
// This can be removed once bower is updated to 1.9.3 (which updates rc to 0.3.0)
//
var args = process.argv.slice(2);
process.argv = [process.argv[0], process.argv[1]];

process.on('uncaughtException', function(err) {
  verbose = false;

  if (err.code === 'EMFILE') {
    console.error('\n\n\tEMFILE error: Too many files open at one time. Fix this by running\n\n\t\tulimit -n 9999\n\n');
  } else {
    console.error('Unhandled Exception:', err.stack || err);
  }
  process.exit(128);
});

var _ = require('underscore'),
    fs = require('fs'),
    lumbar = require('../lib/lumbar'),
    dirname = require('path').dirname,
    growl = require('growl');

var LONG_USAGE="lumbar help\n"+
"        Print this long help message.\n"+
"lumbar build [--package name] [--config file] [--minimize] [--use path [--with options]] lumbarFile [outputDir]\n"+
"        Build out the package(s).\n"+
"lumbar watch [--package name] [--config file] [--minimize] [--use path [--with options]] lumbarFile [outputDir]\n"+
"        Start watching the files for changes and rebuild as necessary.\n"+
"\n"+
"--package:    represents the name of a corresponding package listed\n"+
"              under 'packages' in lumbarFile.\n"+
"\n"+
"--module:     build only a specific module. May be defined multiple times to build multiple.\n"+
"\n"+
"--minimize:   to shrink the resultant file.\n"+
"\n"+
"--sourceMap:  generate a source map for the output modules.\n"+
"              WARN: This copies the source files into the module output unobfuscated.\n"
"                 care should be exercised when used with production releases\n"
"\n"+
"--config:     is the name and path to the lumbar config file, if\n"+
"              not given then lumbar.json is assumed.\n"+
"\n"+
"--use:        path to your plugin to load\n"+
"\n"+
"    --with:   an optional json config object to pass to your plugin.\n"+
"\n"+
"    --name:   an optional name to assign to your plugin.\n"+
"\n"+
"lumbarFile:   is the name and path to the lumbar config file, if\n"+
"              not given then lumbar.json is assumed.\n"+
"\n"+
"outputDir:    Required. Designates where the files will be placed.\n"+
"\n";

var configFile,
    packageName,
    modules = [],
    libraries = [],
    minimize = false,
    sourceMap = false,
    build = true, // build by default.
    watch = false,
    verbose = false,
    modeSeen;

var lumbarFile = 'lumbar.json';
var outputDir;
/**
 * Import paths.
 */
var plugins = [],
    files = [];

var arg;
while (args.length) {
  arg = args.shift();

  var value = arg.split('=');
  arg = value[0];
  value = value[1];

  switch (arg) {
    case '-h':
    case '--help':
      console.error(LONG_USAGE);
      process.exit(0);
      break;
    case '-c':
    case '--config':
      configFile = args.shift();
      if (!configFile) throw new Error('--config <file> required');
      break;
    case '-p':
    case '--package':
      packageName = args.shift();
      if (!packageName) throw new Error('--package <name> required');
      break;
    case '--module':
      var moduleName = args.shift();
      if (!moduleName) throw new Error('--module <name> required');
      modules.push(moduleName);
      break;
    case '--library':
      if (!value) throw new Error('--library=<name> required');
      libraries.push(value);
      break;
    case '-m':
    case '--minimize':
      minimize = true;
      break;
    case '-s':
    case '--sourceMap':
      sourceMap = value || true;
      break;
    case '-b':
    case '--build':
    case 'build':
      if (modeSeen) {
        files.push(arg);
      } else {
        modeSeen = true;
        build = true;
        watch = false;
      }
      break;
    case '-w':
    case '--watch':
    case 'watch':
      if (modeSeen) {
        files.push(arg);
      } else {
        modeSeen = true;
        watch = true;
        build = false;
      }
      break;
    case '-v':
    case '--verbose':
      verbose = true;
      break;
    case '-u':
    case '--use':
      var options;
      var path = args.shift();
      if (!path) throw new Error('--use <path> required');

      if ('--with' == args[0]) {
        args.shift();
        options = args.shift();
        if (!options) throw new Error('--with <options> required');
        try {
          options = eval('(' + options + ')');
        } catch (err) {
          console.error('Failed to parse plugin options:', options);
          throw err;
        }
      }

      plugins.push({ path: path, options: options, name: 'PlugIn_' + plugins.length });

      break;
    default:
      files.push(arg);
  }
}

if (build || watch) {
  var file = files.shift();
  try {
    var stat = fs.statSync(file);

    if (stat.isFile()) {
      lumbarFile = file;

      file = files.shift();
      if (file) {
        outputDir = file;
      }
    } else {
      outputDir = file;
    }
  } catch (err) {
    outputDir = file;
  }

  if (files.length) {
    console.error(LONG_USAGE);
    process.exit(3);
    return true;
  }
} else {
  console.error(LONG_USAGE);
  process.exit(2);
}

plugins = plugins.map(function(plugin) {
  var path = plugin.path;
  var name = plugin.name;
  var options = plugin.options;
  try {
    var fn = require(path);
  } catch (err) {
    try {
      // Load from the current directory if not found in the normal lookup paths
      fn = require(process.cwd() + '/node_modules/' + path);
    } catch (err) {
      // Last case, attempt to load from the plugins dir
      fn = require('../lib/plugins/' + path);
    }
  }

  lumbar.plugin(name, 'function' != typeof fn ? fn : fn(options));
  return name;
});

var options = {
  verbose: verbose,

  libraries: libraries,
  packageConfigFile: configFile,
  minimize: minimize,
  sourceMap: sourceMap,
  outdir: outputDir,
  plugins: plugins
};

// invoke init() from ../lib/lumbar.js.
var arise = lumbar.init(lumbarFile, options),
    // is worker going to point to watch or build func?
    worker = watch ? arise.watch : arise.build,
    lastMessage,
    watchOutput = {},
    growlList = [],
    osType = require('os').type();

function safeGrowl(msg, options) {
  if (require('os').type().toLowerCase().match(/^windows/)) {
    return;
  }
  try {
    growl(msg, options);
  } catch (err) {
    if (err.errno === 'EMFILE') {
      _.defer(safeGrowl, msg, options);
    } else {
      throw err;
    }
  }
}

var pingGrowl = _.debounce(function() {
  safeGrowl('compiled: ' + growlList.map(function(file) { return file.substring(options.outdir.length); }).join('\n\t'), {title: 'Lumbar'});
  growlList = [];
}, 1000);

arise.on('watch-change', function(status) {
  if (!watchOutput[status.fileName]) {
    console.log('\t\033[90mchanged\033[0m ' + status.fileName);
    watchOutput[status.fileName] = true;
  }
});
arise.on('log', function(log) {
  if (verbose) {
    console.log(log);
  }
});
arise.on('output', function(status) {
  if (status.error) {
    return;
  }

  watchOutput = {};
  if (status.watch) {
    console.log('\033[90mwatching\033[0m ' + status.fileName);
  } else {
    console.log('\033[90mcompiled\033[0m ' + status.fileName);
  }
  if (status.warnings && status.warnings.length) {
    if (watch) {
      safeGrowl(status.warnings.length + ' warnings in ' + status.fileName, { title: 'Lumbar warnings', sticky: true });
    }
    console.log('\t\033[91m' + status.warnings.length + ' warnings\033[0m');
    _.each(status.warnings, function(warning) {
      console.log('\t\033[91mwarning\033[0m ' + warning.msg);
      console.log('\t\tat ' + warning.file + ':' +  warning.line + (warning.column ? ',' + warning.column : ''));
      _.each(warning.context, function(line) {
        console.log('\t' + line);
      });
      console.log();
    });
  }

  if (watch) {
    growlList.push(status.fileName);
    pingGrowl();
  }
});
arise.on('error', function(err) {
  if ((err.source || err).code === 'EMFILE') {
    throw err.source || err;
  }

  var message = err.stack || err.message;
  if (lastMessage !== message) {
    lastMessage = message;

    console.error(message);
    try {
      safeGrowl(err.message, { title: 'Lumbar error', sticky: true });
    } catch (err) {
      console.log(err);
      throw err;
    }
  }
});

// execute either watch() or build() and pass lumbar as the context.
worker.call(arise, packageName, modules, function(err, status) {
  if (err) {
    throw err;
  }
});