#!/usr/bin/env python3

import os
import argparse
import sys

ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
if ZULIP_PATH not in sys.path:
    sys.path.append(ZULIP_PATH)

from scripts.lib.zulip_tools import os_families, overwrite_symlink, run, parse_os_release
from scripts.lib.setup_venv import (
    setup_virtualenv, get_venv_dependencies
)

parser = argparse.ArgumentParser(description="Create a production virtualenv with caching")
parser.add_argument("deploy_path")
args = parser.parse_args()

# install dependencies for setting up the virtualenv
distro_info = parse_os_release()
vendor = distro_info['ID']
os_version = distro_info['VERSION_ID']
VENV_DEPENDENCIES = get_venv_dependencies(vendor, os_version)
if "debian" in os_families():
    run(["apt-get", "-y", "install"] + VENV_DEPENDENCIES)
elif "fedora" in os_families():
    run(["yum", "-y", "install"] + VENV_DEPENDENCIES)
else:
    print("Unsupported platform: {}".format(distro_info['ID']))
    sys.exit(1)

# Set the current working directory to the Zulip checkout, so the api/
# relative path in requirements/common.in works.
os.chdir(ZULIP_PATH)

venv_name = "zulip-py3-venv"
cached_venv_path = setup_virtualenv(
    os.path.join(args.deploy_path, venv_name),
    os.path.join(ZULIP_PATH, "requirements", "prod.txt"))

current_venv_path = os.path.join(args.deploy_path, 'zulip-current-venv')
overwrite_symlink(venv_name, current_venv_path)