#!/usr/bin/env python3

import os
import sys
import unittest
import argparse

from importlib import import_module

def parse_args():
    parser = argparse.ArgumentParser()
    parser.add_argument('--coverage',
                        nargs='?',
                        const=True,
                        default=False,
                        help='compute test coverage ("--coverage combine" to combine with previous reports)')
    return parser.parse_args()

def run_all():
    TOOLS_DIR = os.path.dirname(os.path.abspath(__file__))
    ROOT_DIR = os.path.abspath(os.path.join(TOOLS_DIR, '..'))
    BOTS_DIR = os.path.join(ROOT_DIR, 'zulib_bots')
    sys.path.insert(0, BOTS_DIR)

    options = parse_args()

    if options.coverage:
        import coverage
        cov = coverage.Coverage(config_file="tools/.coveragerc")
        if options.coverage == 'combine':
            cov.load()
        cov.start()

    module = 'zulip_bots/zulip_bots/tests/'
    suite = unittest.defaultTestLoader.discover(module)

    suite = unittest.TestSuite([suite])
    runner = unittest.TextTestRunner(verbosity=2)
    result = runner.run(suite)
    if result.failures or result.errors:
        sys.exit(1)

    if not result.failures and options.coverage:
        cov.stop()
        cov.data_suffix = False  # Disable suffix so that filename is .coverage
        cov.save()
        cov.html_report()
        print("HTML report saved under directory 'htmlcov'.")

if __name__ == '__main__':
    run_all()