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#!/usr/bin/env python3

"""
Stand-alone script to manage the GNU Taler
survey frontend.
"""

import argparse
import sys
import os
import site
import logging
from talersurvey.talerconfig import TalerConfig


os.environ.setdefault("TALER_PREFIX", "@prefix@")
site.addsitedir("%s/lib/python%d.%d/site-packages" % (
    "@prefix@",
    sys.version_info.major,
    sys.version_info.minor))

TC = TalerConfig.from_file(os.environ.get("TALER_CONFIG_FILE"))
LOGGER = logging.getLogger(__name__)
# No perfect match to our logging format, but good enough ...
UWSGI_LOGFMT = "%(ltime) %(proto) %(method) %(uri) %(proto) => %(status)"

def handle_serve_http(args):
    port = args.port
    if port is None:
        port = TC["survey"]["http_port"].value_int(required=True)
    spec = ":%d" % (port,)
    os.execlp("uwsgi", "uwsgi",
              "--master",
              "--die-on-term",
              "--log-format", UWSGI_LOGFMT,
              "--http", spec,
              "--wsgi-file", "@prefix@/share/taler/frontend-survey.wsgi")

def handle_serve_uwsgi(args):
    del args # pacify PEP checkers
    serve_uwsgi = TC["survey"]["uwsgi_serve"].value_string(required=True).lower()
    params = ["uwsgi", "uwsgi",
              "--master",
              "--die-on-term",
              "--log-format", UWSGI_LOGFMT,
              "--wsgi-file", "@prefix@/share/taler/frontend-survey.wsgi"]
    if serve_uwsgi == "tcp":
        port = TC["survey"]["uwsgi_port"].value_int(required=True)
        spec = ":%d" % (port,)
        params.extend(["--socket", spec])
    elif serve_uwsgi == "unix":
        spec = TC["survey"]["uwsgi_unixpath"].value_filename(required=True)
        mode = TC["survey"]["uwsgi_unixpath_mode"].value_filename(required=True)
        params.extend(["--socket", spec])
        params.extend(["--chmod-socket="+mode])
        os.makedirs(os.path.dirname(spec), exist_ok=True)
    logging.info("launching uwsgi with argv %s", params[1:])
    os.execlp(*params)



PARSER = argparse.ArgumentParser()
PARSER.set_defaults(func=None)
PARSER.add_argument('--config', '-c',
                    help="configuration file to use",
                    metavar="CONFIG", type=str,
                    dest="config", default=None)
SUB = PARSER.add_subparsers()

P = SUB.add_parser('serve-http', help="Serve over HTTP")
P.add_argument("--port", "-p", dest="port", type=int, default=None, metavar="PORT")
P.set_defaults(func=handle_serve_http)

P = SUB.add_parser('serve-uwsgi', help="Serve over UWSGI")
P.set_defaults(func=handle_serve_uwsgi)

ARGS = PARSER.parse_args()
if getattr(ARGS, 'func', None) is None:
    PARSER.print_help()
    sys.exit(1)

if ARGS.config is not None:
    os.environ["TALER_CONFIG_FILE"] = ARGS.config

ARGS.func(ARGS)