from __future__ import print_function
import os, sys, traceback
import logging.config

APP_CONFIG = "/home/.../production.ini"

logging.config.fileConfig(APP_CONFIG)


def _get_log():
    return open("/home/.../passenger_wsgi.log", 'a')


log = _get_log()
print("running %s" % sys.executable, file=log)

INTERP = "/home/.../bin/python"

if sys.executable != INTERP:
    print("Detected wrong interpreter location , swapping to %s" % INTERP, file=log)
    log.flush()
    log.close()
    os.execl(INTERP, INTERP, *sys.argv)

from paste.deploy import loadapp
from paste.exceptions.errormiddleware import ErrorMiddleware
log.flush()
log.close()


def application(environ, start_response):
    log = _get_log()
    print("Application called:", file=log)
    print("environ: %s" % str(environ), file=log)
    results = []
    try:
        app = loadapp("config:/home/.../production.ini")
        print("App loaded, attempting to run", file=log)
        log.flush()
        results = app(environ, start_response)
        print("App executed successfully", file=log)
    except Exception:  # ignoring the broad exception as this is intended to catch and log any uncaught errors
        traceback.print_exc(file=log)
        log.flush()
    finally:
        log.close()
    print("Returning results.")
    return results


application = ErrorMiddleware(application, debug=True)