import inspect
import os
import shutil
import subprocess
import stat
import sys
import tarfile
import time
import zipfile


def install_requirements(what):
    old_path = sys.path[:]
    w = os.path.join(os.getcwd(), os.path.dirname(inspect.getfile(inspect.currentframe())))
    sys.path.insert(0, os.path.dirname(os.path.dirname(w)))
    try:
        from setup import EXTRAS_REQUIRE, read
    finally:
        sys.path = old_path
    requirements = ['mock>=2.0.0', 'flake8', 'pytest', 'pytest-cov'] if what == 'all' else ['behave']
    requirements += ['coverage']
    # try to split tests between psycopg2 and psycopg3
    requirements += ['psycopg[binary]'] if sys.version_info >= (3, 6, 0) and\
        (sys.platform != 'darwin' or what == 'etcd3') else ['psycopg2-binary']
    for r in read('requirements.txt').split('\n'):
        r = r.strip()
        if r != '':
            extras = {e for e, v in EXTRAS_REQUIRE.items() if v and any(r.startswith(x) for x in v)}
            if not extras or what == 'all' or what in extras:
                requirements.append(r)

    subprocess.call([sys.executable, '-m', 'pip', 'install', '--upgrade', 'pip'])
    r = subprocess.call([sys.executable, '-m', 'pip', 'install'] + requirements)
    s = subprocess.call([sys.executable, '-m', 'pip', 'install', '--upgrade', 'setuptools'])
    return s | r


def install_packages(what):
    from mapping import versions

    packages = {
        'zookeeper': ['zookeeper', 'zookeeper-bin', 'zookeeperd'],
        'consul': ['consul'],
    }
    packages['exhibitor'] = packages['zookeeper']
    packages = packages.get(what, [])
    ver = versions.get(what)
    subprocess.call(['sudo', 'sed', '-i', 's/pgdg main.*$/pgdg main {0}/'.format(ver),
                     '/etc/apt/sources.list.d/pgdg.list'])
    subprocess.call(['sudo', 'apt-get', 'update', '-y'])
    return subprocess.call(['sudo', 'apt-get', 'install', '-y', 'postgresql-' + ver, 'expect-dev', 'wget'] + packages)


def get_file(url, name):
    try:
        from urllib.request import urlretrieve
    except ImportError:
        from urllib import urlretrieve

    print('Downloading ' + url)
    urlretrieve(url, name)


def untar(archive, name):
    with tarfile.open(archive) as tar:
        f = tar.extractfile(name)
        dest = os.path.basename(name)
        with open(dest, 'wb') as d:
            shutil.copyfileobj(f, d)
            return dest


def unzip(archive, name):
    with zipfile.ZipFile(archive, 'r') as z:
        name = z.extract(name)
        dest = os.path.basename(name)
        shutil.move(name, dest)
        return dest


def unzip_all(archive):
    print('Extracting ' + archive)
    with zipfile.ZipFile(archive, 'r') as z:
        z.extractall()


def chmod_755(name):
    os.chmod(name, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR |
             stat.S_IRGRP | stat.S_IXGRP | stat.S_IROTH | stat.S_IXOTH)


def unpack(archive, name):
    print('Extracting {0} from {1}'.format(name, archive))
    func = unzip if archive.endswith('.zip') else untar
    name = func(archive, name)
    chmod_755(name)
    return name


def install_etcd():
    version = os.environ.get('ETCDVERSION', '3.3.13')
    platform = {'linux2': 'linux', 'win32': 'windows', 'cygwin': 'windows'}.get(sys.platform, sys.platform)
    dirname = 'etcd-v{0}-{1}-amd64'.format(version, platform)
    ext = 'tar.gz' if platform == 'linux' else 'zip'
    name = '{0}.{1}'.format(dirname, ext)
    url = 'https://github.com/etcd-io/etcd/releases/download/v{0}/{1}'.format(version, name)
    get_file(url, name)
    ext = '.exe' if platform == 'windows' else ''
    return int(unpack(name, '{0}/etcd{1}'.format(dirname, ext)) is None)


def install_postgres():
    version = os.environ.get('PGVERSION', '14.1-1')
    platform = {'darwin': 'osx', 'win32': 'windows-x64', 'cygwin': 'windows-x64'}[sys.platform]
    name = 'postgresql-{0}-{1}-binaries.zip'.format(version, platform)
    get_file('http://get.enterprisedb.com/postgresql/' + name, name)
    unzip_all(name)
    bin_dir = os.path.join('pgsql', 'bin')
    for f in os.listdir(bin_dir):
        chmod_755(os.path.join(bin_dir, f))
    subprocess.call(['pgsql/bin/postgres', '-V'])
    return 0


def setup_kubernetes():
    get_file('https://storage.googleapis.com/minikube/k8sReleases/v1.7.0/localkube-linux-amd64', 'localkube')
    chmod_755('localkube')

    devnull = open(os.devnull, 'w')
    subprocess.Popen(['sudo', 'nohup', './localkube', '--logtostderr=true', '--enable-dns=false'],
                     stdout=devnull, stderr=devnull)
    for _ in range(0, 120):
        if subprocess.call(['wget', '-qO', '-', 'http://127.0.0.1:8080/'], stdout=devnull, stderr=devnull) == 0:
            break
        time.sleep(1)
    else:
        print('localkube did not start')
        return 1

    subprocess.call('sudo chmod 644 /var/lib/localkube/certs/*', shell=True)
    print('Set up .kube/config')
    kube = os.path.join(os.path.expanduser('~'), '.kube')
    os.makedirs(kube)
    with open(os.path.join(kube, 'config'), 'w') as f:
        f.write("""apiVersion: v1
clusters:
- cluster:
    certificate-authority: /var/lib/localkube/certs/ca.crt
    server: https://127.0.0.1:8443
  name: local
contexts:
- context:
    cluster: local
    user: myself
  name: local
current-context: local
kind: Config
preferences: {}
users:
- name: myself
  user:
    client-certificate: /var/lib/localkube/certs/apiserver.crt
    client-key: /var/lib/localkube/certs/apiserver.key
""")
    return 0


def main():
    what = os.environ.get('DCS', sys.argv[1] if len(sys.argv) > 1 else 'all')

    if what != 'all':
        if sys.platform.startswith('linux'):
            r = install_packages(what)
            if r == 0 and what == 'kubernetes':
                r = setup_kubernetes()
        else:
            r = install_postgres()

        if r == 0 and what.startswith('etcd'):
            r = install_etcd()

        if r != 0:
            return r

    return install_requirements(what)


if __name__ == '__main__':
    sys.exit(main())