# Copyright (c) Jupyter Development Team.
# Distributed under the terms of the Modified BSD License.

import argparse
import subprocess
import sys
import os
import re
import json
import shutil
import threading
import tempfile


# Set up the file structure
root_dir = tempfile.mkdtemp(prefix='mock_contents')
os.mkdir(os.path.join(root_dir, 'src'))
with open(os.path.join(root_dir, 'src', 'temp.txt'), 'w') as fid:
    fid.write('hello')


HERE = os.path.dirname(__file__)

shell = (sys.platform == 'win32')


def start_notebook():
    nb_command = [sys.executable, '-m', 'notebook', root_dir, '--no-browser',
                  # FIXME: allow-origin=* only required for notebook < 4.3
                  '--NotebookApp.allow_origin="*"',
                  # disable user password:
                  '--NotebookApp.password=',
                  # disable token:
                  '--NotebookApp.token=']
    nb_server = subprocess.Popen(nb_command, shell=shell,
                                 stderr=subprocess.STDOUT,
                                 stdout=subprocess.PIPE)

    # wait for notebook server to start up
    while 1:
        line = nb_server.stdout.readline().decode('utf-8').strip()
        if not line:
            continue
        print(line)
        if 'Jupyter Notebook is running at:' in line:
            base_url = re.search(r'(http[^\?]+)', line).groups()[0]
            break

    while 1:
        line = nb_server.stdout.readline().decode('utf-8').strip()
        if not line:
            continue
        print(line)
        if 'Control-C' in line:
            break

    def print_thread():
        while 1:
            line = nb_server.stdout.readline().decode('utf-8').strip()
            if not line:
                continue
            print(line)

    thread = threading.Thread(target=print_thread)
    thread.setDaemon(True)
    thread.start()

    return nb_server, base_url


def run_karma(base_url):
    config = dict(baseUrl=base_url,
                  terminalsAvailable="True")
    with open(os.path.join(HERE, 'build', 'injector.js'), 'w') as fid:
        fid.write("""
        var node = document.createElement('script');
        node.id = 'jupyter-config-data';
        node.type = 'application/json';
        node.textContent = '%s';
        document.body.appendChild(node);
        """ % json.dumps(config))

    cmd = ['karma', 'start'] + sys.argv[1:]
    return subprocess.check_call(cmd, shell=shell, stderr=subprocess.STDOUT)


if __name__ == '__main__':

    nb_server, base_url = start_notebook()

    try:
        resp = run_karma(base_url)
    except (subprocess.CalledProcessError, KeyboardInterrupt):
        resp = 1
    finally:
        nb_server.kill()

    shutil.rmtree(root_dir, True)
    sys.exit(resp)