# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
from __future__ import print_function

import os, sys
import glob
import argparse
import traceback
import WebIDL

class TestHarness(object):
    def __init__(self, test, verbose):
        self.test = test
        self.verbose = verbose
        self.printed_intro = False
        self.passed = 0
        self.failures = []

    def start(self):
        if self.verbose:
            self.maybe_print_intro()

    def finish(self):
        if self.verbose or self.printed_intro:
            print("Finished test %s" % self.test)

    def maybe_print_intro(self):
        if not self.printed_intro:
            print("Starting test %s" % self.test)
            self.printed_intro = True

    def test_pass(self, msg):
        self.passed += 1
        if self.verbose:
            print("TEST-PASS | %s" % msg)

    def test_fail(self, msg):
        self.maybe_print_intro()
        self.failures.append(msg)
        print("TEST-UNEXPECTED-FAIL | %s" % msg)

    def ok(self, condition, msg):
        if condition:
            self.test_pass(msg)
        else:
            self.test_fail(msg)

    def check(self, a, b, msg):
        if a == b:
            self.test_pass(msg)
        else:
            self.test_fail(msg + " | Got %s expected %s" % (a, b))

def run_tests(tests, verbose):
    testdir = os.path.join(os.path.dirname(__file__), 'tests')
    if not tests:
        tests = glob.iglob(os.path.join(testdir, "*.py"))
    sys.path.append(testdir)

    all_passed = 0
    failed_tests = []

    for test in tests:
        (testpath, ext) = os.path.splitext(os.path.basename(test))
        _test = __import__(testpath, globals(), locals(), ['WebIDLTest'])

        harness = TestHarness(test, verbose)
        harness.start()
        try:
            _test.WebIDLTest.__call__(WebIDL.Parser(), harness)
        except Exception as ex:
            harness.test_fail("Unhandled exception in test %s: %s" %
                              (testpath, ex))
            traceback.print_exc()
        finally:
            harness.finish()
        all_passed += harness.passed
        if harness.failures:
            failed_tests.append((test, harness.failures))

    if verbose or failed_tests:
        print()
        print('Result summary:')
        print('Successful: %d' % all_passed)
        print('Unexpected: %d' % \
                sum(len(failures) for _, failures in failed_tests))
        for test, failures in failed_tests:
            print('%s:' % test)
            for failure in failures:
                print('TEST-UNEXPECTED-FAIL | %s' % failure)
    return 1 if failed_tests else 0

def get_parser():
    usage = """%(prog)s [OPTIONS] [TESTS]
               Where TESTS are relative to the tests directory."""
    parser = argparse.ArgumentParser(usage=usage)
    parser.add_argument('-q', '--quiet', action='store_false', dest='verbose',
                        help="Don't print passing tests.", default=None)
    parser.add_argument('-v', '--verbose', action='store_true', dest='verbose',
                        help="Run tests in verbose mode.")
    parser.add_argument('tests', nargs="*", help="Tests to run")
    return parser

if __name__ == '__main__':
    parser = get_parser()
    args = parser.parse_args()
    if args.verbose is None:
        args.verbose = True

    # Make sure the current directory is in the python path so we can cache the
    # result of the webidlyacc.py generation.
    sys.path.append('.')

    sys.exit(run_tests(args.tests, verbose=args.verbose))
