#!/usr/bin/env python

# python setup.py test
#   or
# runtests.py [tests.test_x tests.test_y.SomeTestCase ...]

import os
import sys
import warnings

import django
from django.conf import settings
from django.test.utils import get_runner


def setup_and_run_tests(test_labels=None):
    """Discover and run project tests. Returns number of failures."""
    test_labels = test_labels or ["tests"]

    tags = envlist("ANYMAIL_ONLY_TEST")
    exclude_tags = envlist("ANYMAIL_SKIP_TESTS")

    # In automated testing, don't run live tests unless specifically requested
    if envbool("CONTINUOUS_INTEGRATION") and not envbool("ANYMAIL_RUN_LIVE_TESTS"):
        exclude_tags.append("live")

    if tags:
        print("Only running tests tagged: %r" % tags)
    if exclude_tags:
        print("Excluding tests tagged: %r" % exclude_tags)

    # show DeprecationWarning and other default-ignored warnings:
    warnings.simplefilter("default")

    os.environ["DJANGO_SETTINGS_MODULE"] = (
        "tests.test_settings.settings_%d_%d" % django.VERSION[:2]
    )
    django.setup()

    TestRunner = get_runner(settings)
    test_runner = TestRunner(verbosity=1, tags=tags, exclude_tags=exclude_tags)
    return test_runner.run_tests(test_labels)


def runtests(test_labels=None):
    """Run project tests and exit"""
    # Used as setup test_suite: must either exit or return a TestSuite
    failures = setup_and_run_tests(test_labels)
    sys.exit(bool(failures))


def envbool(var, default=False):
    """Returns value of environment variable var as a bool, or default if not set/empty.

    Converts `'true'` and similar string representations to `True`,
    and `'false'` and similar string representations to `False`.
    """
    # Adapted from the old :func:`~distutils.util.strtobool`
    val = os.getenv(var, "").strip().lower()
    if val == "":
        return default
    elif val in ("y", "yes", "t", "true", "on", "1"):
        return True
    elif val in ("n", "no", "f", "false", "off", "0"):
        return False
    else:
        raise ValueError("invalid boolean value env[%r]=%r" % (var, val))


def envlist(var):
    """Returns value of environment variable var split in a comma-separated list.

    Returns an empty list if variable is empty or not set.
    """
    val = [item.strip() for item in os.getenv(var, "").split(",")]
    if val == [""]:
        # "Splitting an empty string with a specified separator returns ['']"
        val = []
    return val


if __name__ == "__main__":
    runtests(test_labels=sys.argv[1:])