#!/usr/bin/env python2
# -*- coding: utf-8 -*-
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# 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
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""
kallithea.tests.scripts.manual_test_crawler
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Test for crawling a project for memory usage
This should be runned just as regular script together
with a watch script that will show memory usage.

watch -n1 ./kallithea/tests/mem_watch

This file was forked by the Kallithea project in July 2014.
Original author and date, and relevant copyright and licensing information is below:
:created_on: Apr 21, 2010
:author: marcink
:copyright: (c) 2013 RhodeCode GmbH, and others.
:license: GPLv3, see LICENSE.md for more details.
"""


import cookielib
import urllib
import urllib2
import time
import os
import sys
import tempfile
from os.path import dirname

__here__ = os.path.abspath(__file__)
__root__ = dirname(dirname(dirname(__here__)))
sys.path.append(__root__)

from kallithea.lib import vcs
from kallithea.lib.compat import OrderedSet
from kallithea.lib.vcs.exceptions import RepositoryError

PASES = 3
HOST = 'http://127.0.0.1'
PORT = 5000
BASE_URI = '%s:%s/' % (HOST, PORT)

if len(sys.argv) == 2:
    BASE_URI = sys.argv[1]

if not BASE_URI.endswith('/'):
    BASE_URI += '/'

print 'Crawling @ %s' % BASE_URI
BASE_URI += '%s'
PROJECT_PATH = os.path.join('/', 'home', 'username', 'repos')
PROJECTS = [
    #'linux-magx-pbranch',
    'CPython',
    'kallithea',
]


cj = cookielib.FileCookieJar(os.path.join(tempfile.gettempdir(), 'rc_test_cookie.txt'))
o = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
o.addheaders = [
    ('User-agent', 'kallithea-crawler'),
    ('Accept-Language', 'en - us, en;q = 0.5')
]

urllib2.install_opener(o)


def _get_repo(proj):
    if isinstance(proj, basestring):
        repo = vcs.get_repo(os.path.join(PROJECT_PATH, proj))
        proj = proj
    else:
        repo = proj
        proj = repo.name

    return repo, proj


def test_changelog_walk(proj, pages=100):
    repo, proj = _get_repo(proj)

    total_time = 0
    for i in range(1, pages):

        page = '/'.join((proj, 'changelog',))

        full_uri = (BASE_URI % page) + '?' + urllib.urlencode({'page': i})
        s = time.time()
        f = o.open(full_uri)

        assert f.url == full_uri, 'URL:%s does not match %s' % (f.url, full_uri)

        size = len(f.read())
        e = time.time() - s
        total_time += e
        print 'visited %s size:%s req:%s ms' % (full_uri, size, e)

    print 'total_time', total_time
    print 'average on req', total_time / float(pages)


def test_changeset_walk(proj, limit=None):
    repo, proj = _get_repo(proj)

    print 'processing', os.path.join(PROJECT_PATH, proj)
    total_time = 0

    cnt = 0
    for i in repo:
        cnt += 1
        raw_cs = '/'.join((proj, 'changeset', i.raw_id))
        if limit and limit == cnt:
            break

        full_uri = (BASE_URI % raw_cs)
        print '%s visiting %s\%s' % (cnt, full_uri, i)
        s = time.time()
        f = o.open(full_uri)
        size = len(f.read())
        e = time.time() - s
        total_time += e
        print '%s visited %s\%s size:%s req:%s ms' % (cnt, full_uri, i, size, e)

    print 'total_time', total_time
    print 'average on req', total_time / float(cnt)


def test_files_walk(proj, limit=100):
    repo, proj = _get_repo(proj)

    print 'processing', os.path.join(PROJECT_PATH, proj)
    total_time = 0

    paths_ = OrderedSet([''])
    try:
        tip = repo.get_changeset('tip')
        for topnode, dirs, files in tip.walk('/'):

            for dir in dirs:
                paths_.add(dir.path)
                for f in dir:
                    paths_.add(f.path)

            for f in files:
                paths_.add(f.path)

    except RepositoryError as e:
        pass

    cnt = 0
    for f in paths_:
        cnt += 1
        if limit and limit == cnt:
            break

        file_path = '/'.join((proj, 'files', 'tip', f))
        full_uri = (BASE_URI % file_path)
        print '%s visiting %s' % (cnt, full_uri)
        s = time.time()
        f = o.open(full_uri)
        size = len(f.read())
        e = time.time() - s
        total_time += e
        print '%s visited OK size:%s req:%s ms' % (cnt, size, e)

    print 'total_time', total_time
    print 'average on req', total_time / float(cnt)

if __name__ == '__main__':
    for path in PROJECTS:
        repo = vcs.get_repo(os.path.join(PROJECT_PATH, path))
        for i in range(PASES):
            print 'PASS %s/%s' % (i, PASES)
            test_changelog_walk(repo, pages=80)
            test_changeset_walk(repo, limit=100)
            test_files_walk(repo, limit=100)