"""
Common code used by the Deis CLI unit tests.
"""

from __future__ import unicode_literals
import os.path
import random
import re
import stat
from urllib2 import urlparse
from uuid import uuid4

import pexpect


# Constants and data used throughout the test suite
DEIS = os.path.abspath(
    os.path.join(os.path.dirname(__file__), '..', 'deis.py'))
try:
    DEIS_SERVER = os.environ['DEIS_SERVER']
except KeyError:
    DEIS_SERVER = None
    print '\033[35mError: env var DEIS_SERVER must point to a Deis controller URL.\033[0m'
DEIS_TEST_FLAVOR = os.environ.get('DEIS_TEST_FLAVOR', 'vagrant-512')
EXAMPLES = {
    'example-clojure-ring': ('Clojure', 'https://github.com/opdemand/example-clojure-ring.git'),
    'example-dart': ('Dart', 'https://github.com/opdemand/example-dart.git'),
    'example-go': ('Go', 'https://github.com/opdemand/example-go.git'),
    'example-java-jetty': ('Java', 'https://github.com/opdemand/example-java-jetty.git'),
    'example-nodejs-express':
    ('Node.js', 'https://github.com/opdemand/example-nodejs-express.git'),
    'example-perl': ('Perl/PSGI', 'https://github.com/opdemand/example-perl.git'),
    'example-php': (r'PHP \(classic\)', 'https://github.com/opdemand/example-php.git'),
    'example-play': ('Play 2.x - Java', 'https://github.com/opdemand/example-play.git'),
    'example-python-flask': ('Python', 'https://github.com/opdemand/example-python-flask.git'),
    'example-ruby-sinatra': ('Ruby', 'https://github.com/opdemand/example-ruby-sinatra.git'),
    'example-scala': ('Scala', 'https://github.com/opdemand/example-scala.git'),
}


def clone(repo_url, repo_dir):
    """Clone a git repository into the $HOME dir and cd there."""
    os.chdir(os.environ['HOME'])
    child = pexpect.spawn("git clone {} {}".format(repo_url, repo_dir))
    child.expect(', done')
    child.expect(pexpect.EOF)
    os.chdir(repo_dir)


def login(username, password):
    """Login as an existing Deis user."""
    home = os.path.join('/tmp', username)
    os.environ['HOME'] = home
    os.chdir(home)
    git_ssh_path = os.path.expandvars("$HOME/git_ssh.sh")
    os.environ['GIT_SSH'] = git_ssh_path
    child = pexpect.spawn("{} login {}".format(DEIS, DEIS_SERVER))
    child.expect('username:')
    child.sendline(username)
    child.expect('password:')
    child.sendline(password)
    child.expect("Logged in as {}".format(username))
    child.expect(pexpect.EOF)


def purge(username, password):
    """Purge an existing Deis user."""
    child = pexpect.spawn("{} auth:cancel".format(DEIS))
    child.expect('username: ')
    child.sendline(username)
    child.expect('password: ')
    child.sendline(password)
    child.expect('\? \(y/n\) ')
    child.sendline('y')
    child.expect(pexpect.EOF)
    ssh_path = os.path.expanduser('~/.ssh')
    child = pexpect.spawn(os.path.expanduser(
        "rm -f {}/{}*".format(ssh_path, username)))
    child.expect(pexpect.EOF)


def random_repo():
    """Return an example Heroku-style repository name, (type, URL)."""
    name = random.choice(EXAMPLES.keys())
    return name, EXAMPLES[name]


def register():
    """Register a new Deis user from the command line."""
    username = "autotester-{}".format(uuid4().hex[:4])
    password = 'password'
    home = os.path.join('/tmp', username)
    os.environ['HOME'] = home
    os.mkdir(home)
    os.chdir(home)
    # generate an SSH key
    ssh_path = os.path.expandvars('$HOME/.ssh')
    os.mkdir(ssh_path, 0700)
    key_path = "/{}/{}".format(ssh_path, username)
    child = pexpect.spawn("ssh-keygen -f {} -t rsa -N '' -C {}".format(
        key_path, username))
    child.expect("Your public key has been saved")
    child.expect(pexpect.EOF)
    # write out ~/.ssh/config
    ssh_config_path = os.path.expandvars("$HOME/.ssh/config")
    with open(ssh_config_path, 'w') as ssh_config:
        # get hostname from DEIS_SERVER
        server = urlparse.urlparse(DEIS_SERVER).netloc
        ssh_config.write("""\
    Hostname {}
    IdentitiesOnly yes
    IdentityFile {}/.ssh/{}
""".format(server, home, username))
    # make a GIT_SSH script to enforce use of our key
    git_ssh_path = os.path.expandvars("$HOME/git_ssh.sh")
    with open(git_ssh_path, 'w') as git_ssh:
        git_ssh.write("""\
#!/bin/sh

SSH_ORIGINAL_COMMAND="ssh $@"
ssh -F {} "$@"
""".format(ssh_config_path))
    os.chmod(git_ssh_path, stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH
             | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
    os.environ['GIT_SSH'] = git_ssh_path
    child = pexpect.spawn("{} register {}".format(DEIS, DEIS_SERVER))
    child.expect('username: ')
    child.sendline(username)
    child.expect('password: ')
    child.sendline(password)
    child.expect('password \(confirm\): ')
    child.sendline(password)
    child.expect('email: ')
    child.sendline('autotest@opdemand.com')
    child.expect("Registered {}".format(username))
    child.expect("Logged in as {}".format(username))
    child.expect(pexpect.EOF)
    # add keys
    child = pexpect.spawn("{} keys:add".format(DEIS))
    child.expect('Which would you like to use with Deis')
    for index, key in re.findall('(\d)\) ([ \S]+)', child.before):
        if username in key:
            child.sendline(index)
            break
    child.expect('Uploading')
    child.expect('...done')
    child.expect(pexpect.EOF)
    # discover providers
    child = pexpect.spawn("{} providers:discover".format(DEIS))
    opt = child.expect(['Import EC2 credentials\? \(y/n\) :',
                       'No EC2 credentials discovered.'])
    if opt == 0:
        child.sendline('y')
    opt = child.expect(['Import Rackspace credentials\? \(y/n\) :',
                       'No Rackspace credentials discovered.'])
    if opt == 0:
        child.sendline('y')
    opt = child.expect(['Import DigitalOcean credentials\? \(y/n\) :',
                       'No DigitalOcean credentials discovered.'])
    if opt == 0:
        child.sendline('y')
    child.expect(pexpect.EOF)
    return username, password