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"""A class to help start/stop the PyWebSocket server as used by the web tests."""

import os
import sys
import time

from blinkpy.common.path_finder import PathFinder
from blinkpy.web_tests.servers import server_base

_WS_LOG_PREFIX = 'pywebsocket.ws.log-'

_DEFAULT_WS_PORT = 8880


class PyWebSocket(server_base.ServerBase):
    def __init__(self, port_obj, output_dir, python_executable=sys.executable):
        super(PyWebSocket, self).__init__(port_obj, output_dir)
        self._name = 'pywebsocket'
        self._log_prefixes = (_WS_LOG_PREFIX, )
        self._mappings = [{'port': _DEFAULT_WS_PORT, 'scheme': 'ws'}]
        self._pid_file = self._filesystem.join(self._runtime_path,
                                               '%s.pid' % self._name)

        self._port = _DEFAULT_WS_PORT
        self._web_tests = self._port_obj.web_tests_dir()
        self._web_socket_tests = self._filesystem.join(self._web_tests, 'http',
                                                       'tests', 'websocket')
        time_str = time.strftime('%d%b%Y-%H%M%S')
        log_file_name = _WS_LOG_PREFIX + time_str
        self._error_log = self._filesystem.join(self._output_dir,
                                                log_file_name + '-err.txt')
        pywebsocket_base = PathFinder(
            self._filesystem).path_from_chromium_base('third_party',
                                                      'pywebsocket3', 'src')
        pywebsocket_script = self._filesystem.join(
            pywebsocket_base, 'mod_pywebsocket', 'standalone.py')

        self._start_cmd = [
            python_executable,
            '-u',
            pywebsocket_script,
            '--server-host',
            'localhost',
            '--port',
            str(self._port),
            '--document-root',
            self._web_socket_tests,
            '--scan-dir',
            self._web_socket_tests,
            '--cgi-paths',
            '/',
            '--log-file',
            self._error_log,
            '--websock-handlers-map-file',
            self._filesystem.join(self._web_socket_tests, 'handler_map.txt'),
        ]
        # TODO(burnik): Check if this is really needed (and why). If not, just set PYTHONPATH.
        self._env = self._port_obj.setup_environ_for_server()
        self._env['PYTHONPATH'] = (
            pywebsocket_base + os.pathsep + self._env.get('PYTHONPATH', ''))