import os
import sys

import cliapp

import yarnutils

datadir = os.environ['DATADIR']
srcdir = os.environ['SRCDIR']

vars = yarnutils.Variables(datadir)



_next_match = 1

def get_next_match():
    global _next_match
    name = 'MATCH_{}'.format(_next_match)
    _next_match += 1
    return os.environ[name]


def cat_file(filename):
    with open(filename) as f:
        return f.read()


def write_file(filename, content):
    with open(filename, 'w') as f:
        f.write(content)


def runcmd(argv, **kwargs):
    if 'cwd' not in kwargs:
        kwargs['cwd'] = vars['cwd']
    return cliapp.runcmd_unchecked(argv, **kwargs)


def configure_git():
    # Yarn sets $HOME to point at an empty temporary directory.
    # Set up a simple git config so tests can use git.
    runcmd(['git', 'config', '--global', 'user.email', 'tomjon@example.com'])
    runcmd(['git', 'config', '--global', 'user.name', 'Tomjon Tester'])


def run_distix(args, cwd=None):
    if cwd is None:
        cwd = vars['cwd']

    distix = os.path.join(srcdir, 'distix')
    log_file = os.path.join(datadir, 'distix.log')
    exit_code, out, err = runcmd(
        [distix, '--no-default-config', '--quiet', '--log', log_file] +
        args,
        cwd=cwd)
    vars['exit'] = exit_code
    vars['stdout'] = out
    vars['stderr'] = err


def mkmaildir(dirname):
    os.makedirs(dirname)
    for subdir in ['cur', 'tmp', 'new']:
        os.mkdir(os.path.join(dirname, subdir))


def unescape(s):
    return '\n'.join(s.split('\\n'))