# Copyright (c) Microsoft Corporation
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#
# MIT License
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import os
import argparse
import glob
import subprocess
import time
import traceback

from utils import setup_experiment, get_experiment_status, get_yml_content, dump_yml_content, \
    parse_max_duration_time, get_succeeded_trial_num, print_stderr
from utils import GREEN, RED, CLEAR, STATUS_URL, TRIAL_JOBS_URL


def gen_new_config(config_file, training_service='local'):
    ''' 
    Generates temporary config file for integration test, the file
    should be deleted after testing.
    '''
    config = get_yml_content(config_file)
    new_config_file = config_file + '.tmp'

    ts = get_yml_content('training_service.yml')[training_service]
    print(config)
    print(ts)
    config.update(ts)
    print(config)
    dump_yml_content(new_config_file, config)

    return new_config_file, config

def run_test(config_file, training_service, local_gpu=False):
    '''run test per configuration file'''

    new_config_file, config = gen_new_config(config_file, training_service)

    if training_service == 'local' and not local_gpu and config['trial']['gpuNum'] > 0:
        print('no gpu, skiping: ', config_file)
        return

    try:
        print('Testing %s...' % config_file)
        proc = subprocess.run(['nnictl', 'create', '--config', new_config_file])
        assert proc.returncode == 0, '`nnictl create` failed with code %d' % proc.returncode

        max_duration, max_trial_num = get_max_values(config_file)
        sleep_interval = 3

        for _ in range(0, max_duration+30, sleep_interval):
            time.sleep(sleep_interval)
            status = get_experiment_status(STATUS_URL)
            if status == 'DONE':
                num_succeeded = get_succeeded_trial_num(TRIAL_JOBS_URL)
                if training_service == 'local':
                    print_stderr(TRIAL_JOBS_URL)
                assert num_succeeded == max_trial_num, 'only %d succeeded trial jobs, there should be %d' % (num_succeeded, max_trial_num)
                break

        assert status == 'DONE', 'Failed to finish in maxExecDuration'
    finally:
        if os.path.exists(new_config_file):
            os.remove(new_config_file)

def get_max_values(config_file):
    '''Get maxExecDuration and maxTrialNum of experiment'''
    experiment_config = get_yml_content(config_file)
    return parse_max_duration_time(experiment_config['maxExecDuration']), experiment_config['maxTrialNum']

def run(args):
    '''test all configuration files'''
    if args.config is None:
        config_files = glob.glob('./config_test/**/*.test.yml')
    else:
        config_files = args.config.split(',')
    print(config_files)

    for config_file in config_files:
        try:
            # sleep 5 seconds here, to make sure previous stopped exp has enough time to exit to avoid port conflict
            time.sleep(5)
            run_test(config_file, args.ts, args.local_gpu)
            print(GREEN + 'Test %s: TEST PASS' % (config_file) + CLEAR)
        except Exception as error:
            print(RED + 'Test %s: TEST FAIL' % (config_file) + CLEAR)
            print('%r' % error)
            traceback.print_exc()
            raise error
        finally:
            subprocess.run(['nnictl', 'stop'])

if __name__ == '__main__':
    import tensorflow as tf
    print('TF VERSION:', tf.__version__)
    parser = argparse.ArgumentParser()
    parser.add_argument("--config", type=str, default=None)
    parser.add_argument("--ts", type=str, choices=['local', 'remote', 'pai'], default='local')
    parser.add_argument("--local_gpu", action='store_true')
    parser.add_argument("--preinstall", action='store_true')
    args = parser.parse_args()

    setup_experiment(args.preinstall)

    run(args)
