#!/usr/bin/env python3
# -*- 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 http.cookiejar
import os
import sys
import tempfile
import time
import urllib.parse
import urllib.request
from os.path import dirname

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


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


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

urllib.request.install_opener(o)


def _get_repo(proj):
    if isinstance(proj, str):
        repo = vcs.get_repo(os.path.join(PROJECT_PATH, 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.parse.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)