#!/usr/bin/env node

require('lego-colorful').colorful();
var program = require('commander');
var log = require('lego-log');
var legorc = require('legorc');
var resolve = require('path').resolve;
var join = require('path').join;
var exists = require('fs').existsSync;
var readJSON = require('fs-extra').readJSONSync;
var symlink = require('fs-symlink');
var rimraf = require('rimraf').sync;

program.usage('<pkg>');

program.on('--help', function() {
  console.log('  Examples:'.to.bold.blue.color);
  console.log();
  console.log('    $', 'lego link'.to.magenta.color, '/path/to/other/pkg');
  console.log();
});

program.parse(process.argv);

var cwd = process.cwd();
var dir = program.args[0];
var pkg;

if (!dir) {
  return program.help();
}

dir = resolve(cwd, dir);
if (exists(join(dir, 'package.json'))) {
  pkg = readJSON(join(dir, 'package.json'));
}

if (!pkg || !pkg.lego) {
  console.log();
  log.error('miss', 'package.json or "lego" key');
  process.exit(1);
}

var to = join(cwd, legorc.get('install.path'), pkg.name, pkg.version);
var from = join(dir);

rimraf(to);
symlink(from, to, 'junction').then(function() {
  console.log('%s > %s', to, from);
});