# coding: utf-8

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from tests.performance import *


class TestQsubPerformance(TestPerformance):

    def setUp(self):
        TestPerformance.setUp(self)
        attr = {'scheduling': 'False'}
        self.server.manager(MGR_CMD_SET, SERVER, attr)

    def submit_jobs(self, qsub_exec_arg=None, env=None):
        """
        Submits n num of jobs according to the arguments provided
        and returns submission time
        :param qsub_exec_arg: Arguments to qsub.
        :type qsub_exec_arg: String. Defaults to None.
        :param env: Environment variable to be set before submittign job.
        :type env: Dictionary. Defaults to None.
        """
        qsub_path = os.path.join(
                  self.server.pbs_conf['PBS_EXEC'], 'bin', 'qsub')

        if qsub_exec_arg is not None:
            job_sub_arg = qsub_path + ' ' + qsub_exec_arg
            env = {'VARIABLE': 'b' * 13000}
        else:
            job_sub_arg = qsub_path

        job_sub_arg += ' -- /bin/sleep 100'

        start_time = time.time()
        for _ in range(1000):
            qsub = self.du.run_cmd(self.server.hostname,
                                   job_sub_arg,
                                   env=env,
                                   as_script=True,
                                   logerr=False)
            if qsub['rc'] != 0:
                return -1
        end_time = time.time()
        sub_time = round(end_time - start_time, 2)
        return sub_time

    def test_submit_large_env(self):
        """
        This test case does the following
        1. Submit 1000 jobs
        2. Set env variable with huge value
        3. Submit 1000 jobs again with -V as argument to qsub
        4. Collect time taken for both submissions
        """
        sub_time_without_env = self.submit_jobs()
        sub_time_with_env = self.submit_jobs(qsub_exec_arg="-V")

        self.logger.info(
            "Submission time without env is %d and with env is %d sec"
            % (sub_time_without_env, sub_time_with_env))
        self.perf_test_result(sub_time_without_env,
                              "submission_time_without_env", "sec")
        self.perf_test_result(sub_time_with_env,
                              "submission_time_with_env", "sec")