import os
import os.path
import unittest
from shutil import rmtree
from tempfile import mkdtemp
import time

import otf2

from otf2_writer import generate_trace

TIMER_GRANULARITY = 1000000


def t():
    return int(round(time.time() * TIMER_GRANULARITY))


class TestOTF2UserData(unittest.TestCase):

    archive_name = "otf2_test_trace"

    def setUp(self):
        self.old_cwd = os.getcwd()
        self.tmp_dirname = mkdtemp(prefix=os.path.basename(os.path.abspath(__file__))[:-3] + '_tmp', dir=self.old_cwd)
        os.chdir(self.tmp_dirname)

    def tearDown(self):
        os.chdir(self.old_cwd)
        if os.getenv('KEEP_TEST_OUTPUT', '') != '':
            print(self.tmp_dirname)
        else:
            rmtree(self.tmp_dirname)

    def read_trace(self, archive_name):
        with otf2.reader.open(archive_name) as trace:
            for location in trace.definitions.locations:
                self.assertEqual(location.number_of_events, 4)

    def test_integrity(self):
        self.definitions = generate_trace(self.tmp_dirname)
        self.read_trace(os.path.join(self.tmp_dirname, "traces.otf2"))


if __name__ == '__main__':
    unittest.main()