#!/usr/bin/env python
from __future__ import print_function
import os
import sys
import platform
from shutil import move
from urllib import urlretrieve

WRAPPER_VERSION = '1.8.5'
WAF_FILE        = 'build/waf-' + WRAPPER_VERSION
USING_WINDOWS   = (platform.system() == 'Windows')

def get_waf(version):
    filename = 'waf-' + version
    url      = 'ftp://ftp.waf.io/pub/release/' + filename

    print('Downloading', filename + '...')
    urlretrieve(url, filename)
    move(filename, WAF_FILE)

def waf_exec():
    if USING_WINDOWS:
        os.system('python.exe ' + WAF_FILE + ' ' + ' '.join(sys.argv[1:]))
    else:
        os.system('./' + WAF_FILE + ' ' + ' '.join(sys.argv[1:]))

if __name__ == '__main__':
    if not os.path.exists('build'):
        os.mkdir('build')

    if os.path.exists(WAF_FILE):
        waf_exec()
    else:
        get_waf(WRAPPER_VERSION)
        if not USING_WINDOWS: os.system('chmod +x ' + WAF_FILE)
        waf_exec()