"""
Runs libEnsemble on a gen_f that is missing necessary information; this tests
libE worker exception raising

Execute via one of the following commands (e.g. 3 workers):
   mpiexec -np 4 python test_worker_exceptions.py
   python test_worker_exceptions.py --nworkers 3 --comms local
   python test_worker_exceptions.py --nworkers 3 --comms tcp

The number of concurrent evaluations of the objective function will be 4-1=3.
"""

# Do not change these lines - they are parsed by run-tests.sh
# TESTSUITE_COMMS: mpi local tcp
# TESTSUITE_NPROCS: 2 4

import numpy as np

from libensemble.libE import libE
from libensemble.tests.regression_tests.support import nan_func as sim_f
from libensemble.gen_funcs.sampling import uniform_random_sample as gen_f
from libensemble.manager import LoggedException
from libensemble.tools import parse_args, add_unique_random_streams

nworkers, is_manager, libE_specs, _ = parse_args()
n = 2

sim_specs = {
    "sim_f": sim_f,
    "in": ["x"],
    "out": [("f", float)],
}

gen_specs = {
    "gen_f": gen_f,
    "in": [],
    "out": [("x", float, 2)],
    "user": {
        "lb": np.array([-3, -2]),
        "ub": np.array([3, 2]),
        "initial_sample": 100,
    },
}

persis_info = add_unique_random_streams({}, nworkers + 1)

libE_specs["abort_on_exception"] = False
libE_specs["save_H_and_persis_on_abort"] = False

# Tell libEnsemble when to stop
exit_criteria = {"wallclock_max": 10}

# Perform the run
return_flag = 1
try:
    H, persis_info, flag = libE(sim_specs, gen_specs, exit_criteria, persis_info, libE_specs=libE_specs)
except LoggedException as e:
    print("Caught deliberate exception: {}".format(e))
    return_flag = 0

if is_manager:
    assert return_flag == 0
