#!/usr/bin/env python
# -*- coding: utf-8 -*-

__author__ = 'Lucas Meneghel Rodrigues <lmr@redhat.com>'

import gc
import os
import pkg_resources
import subprocess
import sys
import unittest

from avocado.core import data_dir


CHECK_TMP_DIRS = os.path.abspath(os.path.join(os.path.dirname(__file__),
                                              "check_tmp_dirs"))


def plugin_available(plugin_name):
    try:
        pkg_resources.require(plugin_name)
        return True
    except pkg_resources.DistributionNotFound:
        return False


def test_suite():
    suite = unittest.TestSuite()
    loader = unittest.TestLoader()
    selftests_dir = os.path.dirname(os.path.abspath(__file__))
    basedir = os.path.dirname(selftests_dir)
    for section in ('unit', 'functional', 'doc'):
        suite.addTests(loader.discover(start_dir=os.path.join(selftests_dir, section),
                                       top_level_dir=basedir))
    # when other plugins get their own tests, make this a generic loop
    if plugin_available('avocado-framework-plugin-varianter-yaml-to-mux'):
        path = os.path.join(basedir, 'optional_plugins',
                            'varianter_yaml_to_mux', 'tests')
        suite.addTests(loader.discover(start_dir=path, top_level_dir=path))
    return suite


class MyResult(unittest.TextTestResult):
    def stopTest(self, test):
        # stopTest
        ret = super(MyResult, self).stopTest(test)
        # Destroy the data_dir.get_tmpdir ...
        data_dir._tmp_tracker.unittest_refresh_dir_tracker()
        # Rung garbage collection (run __del__s) and force-sync disk
        gc.collect()
        subprocess.Popen("sync", stdin=subprocess.PIPE,
                         stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE).communicate()
        # ... and check whether some dirs were left behind
        dir_check = subprocess.Popen([CHECK_TMP_DIRS], stdout=subprocess.PIPE,
                                     stderr=subprocess.STDOUT)
        if dir_check.wait():
            raise AssertionError("Test %s left some tmp files behind:\n%s"
                                 % (test, dir_check.stdout.read()))
        return ret


if __name__ == '__main__':
    runner = unittest.TextTestRunner(failfast=not os.environ.get("SELF_CHECK_CONTINUOUS"),
                                     verbosity=1, resultclass=MyResult)
    result = runner.run(test_suite())
    if result.failures or result.errors:
        sys.exit(1)