#!/usr/bin/env node

var program = require('commander');

// usage

program
  .version(require('../package').version)
  .usage('<command> [options]');

// sub-command help

program.on('--help', function(){
  console.log('  Commands:');
  console.log();
  console.log('    build                   build the component');
  console.log('    crawl                   crawl a github user/organization for components');
  console.log('    duplicates              check for multiple versions of dependencies');
  console.log('    install [name ...]      install and save one or more components');
  console.log('    link [folder]           symlink a component');
  console.log('    ls                      list installed components');
  console.log('    outdated                check for outdated pinned dependencies');
  console.log('    pin                     pin ranged dependencies');
  console.log('    search [query]          search with the given query');
  console.log('    update                  update pinned dependencies')
  console.log('    validate                validate component.json\'s');
  console.log();
  console.log('  For more help, run `component build -h` for relevant links.');
  console.log();
  process.exit();
});

// parse argv

program.parse(process.argv);

var spawn = require('win-fork');
var path = require('path');
var fs = require('fs');
var join = path.join;
var stat = fs.statSync;
var exists = fs.existsSync;
var resolve = path.resolve;

// args void of cmd

var args = process.argv.slice(3);

// command

var cmd = program.args[0];

// alias "install" as "add"

if ('add' === cmd) cmd = 'install';

// display help

if (!cmd) program.help();

// executable

var bin = 'component-' + cmd;

// local or resolve to absolute executable path

var local = join(__dirname, bin);

if (exists(local)) {
  bin = local;
} else {
  bin = process.env.PATH.split(path.delimiter).reduce(function(binary, p) {
    p = resolve(p, bin);
    return exists(p) && stat(p).isFile() ? p : binary;
  }, bin);
}

// display help if bin does not exist

if (!exists(bin)) {
  console.error('\n  %s(1) does not exist', bin);
  program.help();
}

// spawn

var proc = spawn(bin, args, { stdio: 'inherit', customFds: [0, 1, 2] });

proc.on('close', function(code){
  process.exit(code);
});