# Copyright (C) 2011 Google Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
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# 1.  Redistributions of source code must retain the above copyright
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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import BaseHTTPServer
import SocketServer
import logging
import json
import os
import re
import sys
import urllib

from webkitpy.common.memoized import memoized
from webkitpy.tool.servers.reflectionhandler import ReflectionHandler
from webkitpy.layout_tests.port import builders


_log = logging.getLogger(__name__)


class GardeningHTTPServer(SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer):
    def __init__(self, httpd_port, config):
        server_name = ''
        self.tool = config['tool']
        self.options = config['options']
        BaseHTTPServer.HTTPServer.__init__(self, (server_name, httpd_port), GardeningHTTPRequestHandler)

    def url(self, args=None):
        # We can't use urllib.encode() here because that encodes spaces as plus signs and the buildbots don't decode those properly.
        arg_string = ('?' + '&'.join("%s=%s" % (key, urllib.quote(value)) for (key, value) in args.items())) if args else ''
        return 'http://localhost:8127/garden-o-matic.html' + arg_string


class GardeningHTTPRequestHandler(ReflectionHandler):
    REVISION_LIMIT = 100
    BLINK_SVN_URL = 'http://src.chromium.org/blink/trunk'
    CHROMIUM_SVN_DEPS_URL = 'http://src.chromium.org/chrome/trunk/src/DEPS'
    # "webkit_revision": "149598",
    BLINK_REVISION_REGEXP = re.compile(r'^  "webkit_revision": "(?P<revision>\d+)",$', re.MULTILINE);

    STATIC_FILE_NAMES = frozenset()

    STATIC_FILE_EXTENSIONS = ('.js', '.css', '.html', '.gif', '.png', '.ico')

    STATIC_FILE_DIRECTORY = os.path.join(
        os.path.dirname(__file__),
        '..',
        '..',
        '..',
        '..',
        'GardeningServer')

    allow_cross_origin_requests = True
    debug_output = ''

    def ping(self):
        self._serve_text('pong')

    def _run_webkit_patch(self, command, input_string):
        PIPE = self.server.tool.executive.PIPE
        process = self.server.tool.executive.popen([self.server.tool.path()] + command, cwd=self.server.tool.scm().checkout_root, stdin=PIPE, stdout=PIPE, stderr=PIPE)
        process.stdin.write(input_string)
        output, error = process.communicate()
        return (process.returncode, output, error)

    def svnlog(self):
        self._serve_xml(self.server.tool.executive.run_command(['svn', 'log', '--xml', '--limit', self.REVISION_LIMIT, self.BLINK_SVN_URL]))

    def lastroll(self):
        deps_contents = self.server.tool.executive.run_command(['svn', 'cat', self.CHROMIUM_SVN_DEPS_URL])
        match = re.search(self.BLINK_REVISION_REGEXP, deps_contents)
        if not match:
            _log.error("Unable to produce last Blink roll revision")
            self._serve_text("0")
            return

        revision_line = match.group()
        revision = match.group("revision")
        self._serve_text(revision)

    def rebaselineall(self):
        command = ['rebaseline-json']
        if self.server.options.results_directory:
            command.extend(['--results-directory', self.server.options.results_directory])
        if not self.server.options.optimize:
            command.append('--no-optimize')
        if self.server.options.verbose:
            command.append('--verbose')
        json_input = self.read_entity_body()

        _log.debug("calling %s, input='%s'", command, json_input)
        return_code, output, error = self._run_webkit_patch(command, json_input)
        print >> sys.stderr, error
        if return_code:
            _log.error("rebaseline-json failed: %d, output='%s'" % (return_code, output))
        else:
            _log.debug("rebaseline-json succeeded")

        # FIXME: propagate error and/or log messages back to the UI.
        self._serve_text('success')

    def localresult(self):
        path = self.query['path'][0]
        filesystem = self.server.tool.filesystem

        # Ensure that we're only serving files from inside the results directory.
        if not filesystem.isabs(path) and self.server.options.results_directory:
            fullpath = filesystem.abspath(filesystem.join(self.server.options.results_directory, path))
            if fullpath.startswith(filesystem.abspath(self.server.options.results_directory)):
                self._serve_file(fullpath, headers_only=(self.command == 'HEAD'))
                return

        self.send_response(403)