# SPDX-License-Identifier: CC0-1.0

"""
Haketilo unit tests - exposing some special functionalities to injected scripts
"""

# This file is part of Haketilo
#
# Copyright (C) 2022 Wojtek Kosior <koszko@koszko.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the CC0 1.0 Universal License as published by
# the Creative Commons Corporation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# CC0 1.0 Universal License for more details.

import pytest
import json
from selenium.webdriver.support.ui import WebDriverWait

from ..script_loader import load_script
from ..world_wide_library import some_data

def content_script():
    return load_script('content/haketilo_apis.js') + ';\nstart();'

def background_script():
    return load_script('background/CORS_bypass_server.js') + ';\nstart();'

resource_url = 'https://anotherdoma.in/resource/blocked/by/CORS.json'

@pytest.mark.ext_data({
    'content_script': content_script,
    'background_script': background_script
})
@pytest.mark.usefixtures('webextension')
def test_haketilo_apis_CORS_bypass(driver):
    """
    Verify injected scripts will be able to bypass CORS with the help of
    Haketilo API.
    """
    driver.get('https://gotmyowndoma.in/')

    # First, verify that it is impossible to normally fetch the resource.
    with pytest.raises(Exception, match='NetworkError'):
        driver.execute_script('return fetch(arguments[0]);', resource_url)

    # First, verify that it is possible to fetch the resource using API.
    response = driver.execute_script(
        '''
        const fetch_arg = {
            url: arguments[0],
            init: {},
            verify_that_nonstandard_properties_are_ignored: ":)"
        };

        const detail = {
            data: JSON.stringify(fetch_arg),
            id:   "abcdef",
            nonstandard_properties_verify_that_ignored_are: ":o"
        };

        let cb, done = new Promise(_cb => cb = _cb);
        window.addEventListener("haketilo_CORS_bypass-abcdef",
                                e => cb(JSON.parse(e.detail)));
        window.dispatchEvent(new CustomEvent("haketilo_CORS_bypass", {detail}));

        return done;
        ''',
        resource_url)

    assert response['body'] == some_data.encode().hex()
    assert response['status'] == 200
    assert type(response['headers']) is list

@pytest.mark.ext_data({
    'content_script': content_script,
    'background_script': background_script
})
@pytest.mark.usefixtures('webextension')
@pytest.mark.parametrize('error', [
    'bad url',
    'no_url',
    'non_string_url',
    'non_object_init',
    'non_object_detail',
    'non_string_id',
    'non_string_data'
])
def test_haketilo_apis_CORS_bypass_errors(driver, error):
    """
    Verify errors are returned properly by CORS_bypass API.
    """
    data = {
        'bad_url':         {'url': 'muahahahaha', 'init': {}},
        'no_url':          {'init': {}},
        'non_string_url':  {'url': {}, 'init': {}},
        'non_object_init': {'url': {}, 'init': ":d"},
    }.get(error, {'url': resource_url, 'init': {}})

    detail = {
        'non_object_detail': '!!!',
        'non_string_id':     {'data': json.dumps(data), 'id': None},
        'non_string_data':   {'data': data, 'id': 'abcdef'}
    }.get(error, {'data': json.dumps(data), 'id': 'abcdef'})

    driver.get('https://gotmyowndoma.in/')

    result = driver.execute_script(
        '''
        let cb, done = new Promise(_cb => cb = _cb);
        window.addEventListener("haketilo_CORS_bypass-abcdef",
                                e => cb(JSON.parse(e.detail)));
        window.dispatchEvent(new CustomEvent("haketilo_CORS_bypass",
                                             {detail: arguments[0]}));
        setTimeout(() => cb("timeout"), 5000);

        return done;
        ''',
        detail)

    if error in {'bad_url', 'no_url', 'non_string_url', 'non_object_init'}:
        assert result['error']['name'] == 'TypeError'

    if error in {'non_object_detail', 'non_string_id', 'non_string_data'}:
        assert result == 'timeout'