##############################################################################
#
# Copyright Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################

import logging
import os
import time

CI = os.environ.get("CI", False)
CI_ZK_VERSION = CI and os.environ.get("ZOOKEEPER_VERSION", None)
if CI_ZK_VERSION:
    if "-" in CI_ZK_VERSION:
        # Ignore pre-release markers like -alpha
        CI_ZK_VERSION = CI_ZK_VERSION.split("-")[0]
    CI_ZK_VERSION = tuple([int(n) for n in CI_ZK_VERSION.split(".")])


class Handler(logging.Handler):
    def __init__(self, *names, **kw):
        logging.Handler.__init__(self)
        self.names = names
        self.records = []
        self.setLoggerLevel(**kw)

    def setLoggerLevel(self, level=1):
        self.level = level
        self.oldlevels = {}

    def emit(self, record):
        self.records.append(record)

    def clear(self):
        del self.records[:]

    def install(self):
        for name in self.names:
            logger = logging.getLogger(name)
            self.oldlevels[name] = logger.level
            logger.setLevel(self.level)
            logger.addHandler(self)

    def uninstall(self):
        for name in self.names:
            logger = logging.getLogger(name)
            logger.setLevel(self.oldlevels[name])
            logger.removeHandler(self)

    def __str__(self):
        return "\n".join(
            [
                (
                    "%s %s\n  %s"
                    % (
                        record.name,
                        record.levelname,
                        "\n".join(
                            [
                                line
                                for line in record.getMessage().split("\n")
                                if line.strip()
                            ]
                        ),
                    )
                )
                for record in self.records
            ]
        )


class InstalledHandler(Handler):
    def __init__(self, *names, **kw):
        Handler.__init__(self, *names, **kw)
        self.install()


class Wait(object):
    class TimeOutWaitingFor(Exception):
        "A test condition timed out"

    timeout = 9
    wait = 0.01

    def __init__(
        self,
        timeout=None,
        wait=None,
        exception=None,
        getnow=(lambda: time.time),
        getsleep=(lambda: time.sleep),
    ):

        if timeout is not None:
            self.timeout = timeout

        if wait is not None:
            self.wait = wait

        if exception is not None:
            self.TimeOutWaitingFor = exception

        self.getnow = getnow
        self.getsleep = getsleep

    def __call__(self, func=None, timeout=None, wait=None, message=None):
        if func is None:
            return lambda func: self(func, timeout, wait, message)

        if func():
            return

        now = self.getnow()
        sleep = self.getsleep()
        if timeout is None:
            timeout = self.timeout
        if wait is None:
            wait = self.wait
        wait = float(wait)

        deadline = now() + timeout
        while 1:
            sleep(wait)
            if func():
                return
            if now() > deadline:
                raise self.TimeOutWaitingFor(
                    message or func.__doc__ or func.__name__
                )


wait = Wait()