#!/usr/bin/env python2.7
import os
import sys
import subprocess
import logging
import datetime
import shutil
import time

os.environ["PYTHONUNBUFFERED"] = "y"

sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
from zulip_tools import DEPLOYMENTS_DIR, LOCK_DIR, FAIL, WARNING, ENDC, make_deploy_path

logging.basicConfig(format="%(asctime)s update-deployment: %(message)s",
                    level=logging.INFO)

if len(sys.argv) != 2:
    print FAIL + "Usage: update-deployment refname" + ENDC
    sys.exit(1)

refname = sys.argv[1]

subprocess.check_call(["mkdir", '-p',
                       DEPLOYMENTS_DIR,
                       '/home/zulip/logs'])

start_time = time.time()
got_lock = False
while time.time() - start_time < 300:
    try:
        os.mkdir(LOCK_DIR)
        got_lock = True
        break
    except OSError:
        print WARNING + "Another deployment in progress; waiting for lock..." + ENDC
        time.sleep(3)

if not got_lock:
    print FAIL + "Deployment already in progress.  Please run\n" \
               + "  %s/current/tools/update-deployment %s\n" % (DEPLOYMENTS_DIR, refname) \
               + "manually when the current deployment finishes." + ENDC
    sys.exit(1)

try:
    deploy_path = make_deploy_path()

    logging.info("Cloning the repository")
    subprocess.check_call(["git", "clone", "-q", "-b", refname,
                           "git@git.zulip.net:eng/zulip.git",
                           deploy_path], stdout=open('/dev/null', 'w'))

    os.chdir(deploy_path)
    # Hack to deploy images not included in open source project
    subprocess.check_call(["cp", "-a", "/etc/zulip/zulip-dropbox.png",
                           os.path.join(deploy_path, "static/images/logo")])

    # Update static files
    logging.info("Updating static files")
    subprocess.check_call(["./tools/update-prod-static", "--prev-deploy",
                           os.path.join(DEPLOYMENTS_DIR, 'current')])

    logging.info("Restarting server...")
    subprocess.check_call(["./scripts/restart-server"])

    logging.info("Deployment complete")
    subprocess.check_call(["./scripts/purge-old-deployments"])
finally:
    shutil.rmtree(LOCK_DIR)