# Copyright 2009, 2010, 2011 Canonical Ltd
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335  USA


# This file allows loggerhead to be treated as a plugin for bzr.
#
# XXX: Because loggerhead already contains a loggerhead directory, much of the
# code is going to appear loaded at breezy.plugins.loggerhead.loggerhead.
# This seems like the easiest thing, because breezy wants the top-level plugin
# directory to be the module, but when it's used as a library people expect
# the source directory to contain a directory called loggerhead.  -- mbp
# 20090123

"""Loggerhead web viewer for Bazaar branches.

This provides a new option "--http" to the "bzr serve" command, that
starts a web server to browse the contents of a branch.
"""

try:
    import importlib.metadata as importlib_metadata
except ImportError:
    import importlib_metadata

import sys

from packaging.version import Version

try:
    version_info = Version(importlib_metadata.version("loggerhead")).release
except importlib_metadata.PackageNotFoundError:
    # Support running tests from the build tree without installation.
    version_info = None

import breezy
from breezy import commands
from breezy.transport import transport_server_registry

DEFAULT_HOST = '0.0.0.0'
DEFAULT_PORT = 8080
HELP = ('Loggerhead, a web-based code viewer and server. (default port: %d)' %
        (DEFAULT_PORT,))


def serve_http(transport, host=None, port=None, inet=None, client_timeout=None):
    # TODO: if we supported inet to pass requests in and respond to them,
    #       then it would be easier to test the full stack, but it probably
    #       means routing around paste.httpserver.serve which probably
    #       isn't testing the full stack
    from paste.httpexceptions import HTTPExceptionHandler
    from paste.httpserver import serve

    try:
        from .loggerhead.apps.http_head import HeadMiddleware
        from .loggerhead.apps.transport import BranchesFromTransportRoot
        from .loggerhead.config import LoggerheadConfig
        from .loggerhead.__main__ import setup_logging
    except ImportError:
        from loggerhead.apps.http_head import HeadMiddleware
        from loggerhead.apps.transport import BranchesFromTransportRoot
        from loggerhead.config import LoggerheadConfig
        from loggerhead.__main__ import setup_logging

    if host is None:
        host = DEFAULT_HOST
    if port is None:
        port = DEFAULT_PORT
    argv = ['--host', host, '--port', str(port), '--', transport.base]
    if not transport.is_readonly():
        argv.insert(0, '--allow-writes')
    config = LoggerheadConfig(argv)
    setup_logging(config, init_logging=False, log_file=sys.stderr)
    app = BranchesFromTransportRoot(transport.base, config)
    # Bug #758618, HeadMiddleware seems to break HTTPExceptionHandler from
    # actually sending appropriate return codes to the client. Since nobody
    # desperately needs HeadMiddleware right now, just ignoring it.
    # app = HeadMiddleware(app)
    app = HTTPExceptionHandler(app)
    serve(app, host=host, port=port)

transport_server_registry.register('http', serve_http, help=HELP)

class cmd_load_test_loggerhead(commands.Command):
    """Run a load test against a live loggerhead instance.

    Pass in the name of a script file to run. See loggerhead/load_test.py
    for a description of the file format.
    """

    hidden = True
    takes_args = ["filename"]

    def run(self, filename):
        try:
            from .loggerhead.loggerhead import load_test
        except ImportError:
            from loggerhead.loggerhead import load_test
        script = load_test.run_script(filename)
        for thread_id in sorted(script._threads):
            worker = script._threads[thread_id][0]
            for url, success, time in worker.stats:
                self.outf.write(' %5.3fs %s %s\n'
                                % (time, str(success)[0], url))

commands.register_command(cmd_load_test_loggerhead)

def load_tests(loader, basic_tests, pattern):
    try:
        from .loggerhead.tests import test_suite
    except ImportError:
        from breezy.trace import mutter
        mutter(
            'loggerhead tests not installed, not registering tests')
    else:
        basic_tests.addTest(test_suite())
    return basic_tests