import pytest
import time
from context import HGECtx, HGECtxError, EvtsWebhookServer, HGECtxGQLServer, GQLWsClient
import threading
import random
from datetime import datetime
import sys
import os

def pytest_addoption(parser):
    parser.addoption(
        "--hge-urls",
        metavar="HGE_URLS",
        help="csv list of urls for graphql-engine",
        required=False,
        nargs='+'
    )
    parser.addoption(
        "--pg-urls", metavar="PG_URLS",
        help="csv list of urls for connecting to Postgres directly",
        required=False,
        nargs='+'
    )
    parser.addoption(
        "--hge-key", metavar="HGE_KEY", help="admin secret key for graphql-engine", required=False
    )
    parser.addoption(
        "--hge-webhook", metavar="HGE_WEBHOOK", help="url for graphql-engine's access control webhook", required=False
    )
    parser.addoption(
        "--test-webhook-insecure", action="store_true",
        help="Run Test cases for insecure https webhook"
    )
    parser.addoption(
        "--hge-jwt-key-file", metavar="HGE_JWT_KEY_FILE", help="File containting the private key used to encode jwt tokens using RS512 algorithm", required=False
    )
    parser.addoption(
        "--hge-jwt-conf", metavar="HGE_JWT_CONF", help="The JWT conf", required=False
    )

    parser.addoption(
        "--test-cors", action="store_true",
        required=False,
        help="Run testcases for CORS configuration"
    )

    parser.addoption(
        "--test-ws-init-cookie",
        metavar="read|noread",
        required=False,
        help="Run testcases for testing cookie sending over websockets"
    )

    parser.addoption(
        "--test-metadata-disabled", action="store_true",
        help="Run Test cases with metadata queries being disabled"
    )

    parser.addoption(
        "--test-graphql-disabled", action="store_true",
        help="Run Test cases with GraphQL queries being disabled"
    )

    parser.addoption(
        "--test-hge-scale-url",
        metavar="<url>",
        required=False,
        help="Run testcases for horizontal scaling"
    )

#By default,
#1) Set default parallelism to one
#2) Set test grouping to by filename (--dist=loadfile)
def pytest_cmdline_preparse(config, args):
    worker = os.environ.get('PYTEST_XDIST_WORKER')
    if 'xdist' in sys.modules and not worker:  # pytest-xdist plugin
        num = 1
        args[:] = ["-n" + str(num),"--dist=loadfile"] + args


def pytest_configure(config):
    if is_master(config):
        config.hge_ctx_gql_server = HGECtxGQLServer()
        if not config.getoption('--hge-urls'):
            print("hge-urls should be specified")
        if not config.getoption('--pg-urls'):
            print("pg-urls should be specified")
        config.hge_url_list = config.getoption('--hge-urls')
        config.pg_url_list =  config.getoption('--pg-urls')
        if config.getoption('-n', default=None):
            xdist_threads = config.getoption('-n')
            assert xdist_threads <= len(config.hge_url_list), "Not enough hge_urls specified, Required " + str(xdist_threads) + ", got " + str(len(config.hge_url_list))
            assert xdist_threads <= len(config.pg_url_list), "Not enough pg_urls specified, Required " + str(xdist_threads) + ", got " + str(len(config.pg_url_list))

    random.seed(datetime.now())

@pytest.hookimpl(optionalhook=True)
def pytest_configure_node(node):
    node.slaveinput["hge-url"] = node.config.hge_url_list.pop()
    node.slaveinput["pg-url"] = node.config.pg_url_list.pop()

def pytest_unconfigure(config):
        config.hge_ctx_gql_server.teardown()

@pytest.fixture(scope='module')
def hge_ctx(request):
    config = request.config
    print("create hge_ctx")
    if is_master(config):
        hge_url = config.hge_url_list[0]
    else:
        hge_url = config.slaveinput["hge-url"]

    if is_master(config):
        pg_url = config.pg_url_list[0]
    else:
        pg_url = config.slaveinput["pg-url"]

    hge_key = config.getoption('--hge-key')
    hge_webhook = config.getoption('--hge-webhook')
    webhook_insecure = config.getoption('--test-webhook-insecure')
    hge_jwt_key_file = config.getoption('--hge-jwt-key-file')
    hge_jwt_conf = config.getoption('--hge-jwt-conf')
    ws_read_cookie = config.getoption('--test-ws-init-cookie')
    metadata_disabled = config.getoption('--test-metadata-disabled')
    hge_scale_url = config.getoption('--test-hge-scale-url')
    try:
        hge_ctx = HGECtx(
            hge_url=hge_url,
            pg_url=pg_url,
            hge_key=hge_key,
            hge_webhook=hge_webhook,
            webhook_insecure=webhook_insecure,
            hge_jwt_key_file=hge_jwt_key_file,
            hge_jwt_conf=hge_jwt_conf,
            ws_read_cookie=ws_read_cookie,
            metadata_disabled=metadata_disabled,
            hge_scale_url=hge_scale_url
        )
    except HGECtxError as e:
        pytest.exit(str(e))

    yield hge_ctx  # provide the fixture value
    print("teardown hge_ctx")
    hge_ctx.teardown()
    time.sleep(1)

@pytest.fixture(scope='class')
def evts_webhook(request):
    webhook_httpd = EvtsWebhookServer(server_address=('127.0.0.1', 5592))
    web_server = threading.Thread(target=webhook_httpd.serve_forever)
    web_server.start()
    yield webhook_httpd
    webhook_httpd.shutdown()
    webhook_httpd.server_close()
    web_server.join()

@pytest.fixture(scope='class')
def ws_client(request, hge_ctx):
    client = GQLWsClient(hge_ctx, '/v1/graphql')
    time.sleep(0.1)
    yield client
    client.teardown()

@pytest.fixture(scope='class')
def setup_ctrl(request, hge_ctx):
    """
    This fixure is used to store the state of test setup in some test classes.
    Used primarily when teardown is skipped in some test cases in the class where the test is not expected to change the database state.
    """
    setup_ctrl = { "setupDone" : False }
    yield setup_ctrl
    hge_ctx.may_skip_test_teardown = False
    request.cls().do_teardown(setup_ctrl, hge_ctx)

def is_master(config):
    """True if the code running the given pytest.config object is running in a xdist master
    node or not running xdist at all.
    """
    return not hasattr(config, 'slaveinput')