from fabric.api import env, local, put, run, cd, lcd, task, prefix
from fabric.contrib.files import exists
from fabric.colors import green
import tempfile
import shutil
import os
import settings


def __init():
    if not env.get('temp_folder', None):
        env['temp_folder'] = tempfile.mkdtemp()
        print(green("working folder is %s" % env['temp_folder']))

def __clean():
    if env.get('temp_folder', None):
        print(green("Removing %s" % env['temp_folder']))
        shutil.rmtree(env['temp_folder'])

def get_version_path():
    return os.path.join(env['temp_folder'], env['version'])

def export():
    local('hg archive -r %s %s' % (env['version'], get_version_path()) )

def pack():
    # create a new source distribution as tarball
    with lcd(get_version_path()):
        local('python setup.py sdist --formats=gztar', capture=False)

def create_virtualenv():
    with lcd(get_version_path()):
        tmpd = run('mktemp -d').strip()
        put('virtualenv/*.txt', tmpd)
        run('virtualenv -p /usr/bin/python3 %s' % env.srv_venv_path)
        with prefix('source %s/bin/activate' % env.srv_venv_path):
            run('pip install -r %s/requirements.txt' % tmpd)
            run('pip install -r %s/requirements_srvr.txt' % tmpd)
        run('rm -fr %s' % tmpd)


def deploy():
    # figure out the release name and version
    with lcd(get_version_path()):
        dist = local('python setup.py --fullname', capture=True).strip()
        print(green("dist is %s" % dist))

        # upload the source tarball to the temporary folder on the server
        put('dist/%s.tar.gz' % dist, '/tmp/%s.tar.gz' % dist)
        # create a place where we can unzip the tarball, then enter
        # that directory and unzip it
        # now setup the package with our virtual environment's
        # python interpreter
        with prefix('source %s/bin/activate' % env.srv_venv_path):
            run('pip install -U --force-reinstall /tmp/%s.tar.gz' % dist)
        # now that all is set up, delete the folder again

        run('rm -rf /tmp/%s.tar.gz' % dist)
        # # and finally touch the .wsgi file so that mod_wsgi triggers
        # # a reload of the application
        # run('touch /var/www/yourapplication.wsgi')

@task(default=True)
def deploy_version(version='tip'):
    env['version'] = version
    __init()
    export()
    pack()
    if not exists(env.srv_venv_path):
        create_virtualenv()
    deploy()
    __clean()