# Copyright 2012 Vincent Jacques
# vincent@vincent-jacques.net

# This file is part of PyGithub. http://vincent-jacques.net/PyGithub

# PyGithub is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

# PyGithub 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 Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public License along with PyGithub.  If not, see <http://www.gnu.org/licenses/>.

import os
import sys
import unittest
import httplib
import traceback

import github

class FakeHttpResponse:
    def __init__( self, status, headers, output ):
        self.status = status
        self.__headers = headers
        self.__output = output

    def getheaders( self ):
        return self.__headers

    def read( self ):
        return self.__output

def fixAuthorizationHeader( headers ):
    if "Authorization" in headers:
        if headers[ "Authorization" ].startswith( "token " ):
            headers[ "Authorization" ] = "token private_token_removed"
        elif headers[ "Authorization" ].startswith( "Basic " ):
            headers[ "Authorization" ] = "Basic login_and_password_removed"
        else:
            assert False

class RecordingConnection:
    def __init__( self, file, protocol, host, port, *args, **kwds ):
        self.__file = file
        self.__protocol = protocol
        self.__host = host
        self.__port = str( port )
        self.__cnx = self._realConnection( host, port, *args, **kwds )

    def request( self, verb, url, input, headers ):
        print verb, url, input, headers,
        self.__cnx.request( verb, url, input, headers )
        fixAuthorizationHeader( headers )
        self.__file.write( self.__protocol + " " + verb + " " + self.__host + " " + self.__port + " " + url + " " + str( headers ) + " " + input + "\n" )

    def getresponse( self ):
        res = self.__cnx.getresponse()

        status = res.status
        print "=>", status
        headers = res.getheaders()
        output = res.read()

        self.__file.write( str( status ) + "\n" )
        self.__file.write( str( headers ) + "\n" )
        self.__file.write( str( output ) + "\n" )

        return FakeHttpResponse( status, headers, output )

    def close( self ):
        self.__file.write( "\n" )
        return self.__cnx.close()

class RecordingHttpConnection( RecordingConnection ):
    _realConnection = httplib.HTTPConnection

    def __init__( self, file, *args, **kwds ):
        RecordingConnection.__init__( self, file, "http", *args, **kwds )

class RecordingHttpsConnection( RecordingConnection ):
    _realConnection = httplib.HTTPSConnection

    def __init__( self, file, *args, **kwds ):
        print args, kwds
        RecordingConnection.__init__( self, file, "https", *args, **kwds )

class ReplayingConnection:
    def __init__( self, testCase, file, protocol, host, port, *args, **kwds ):
        self.__testCase = testCase
        self.__file = file
        self.__protocol = protocol
        self.__host = host
        self.__port = str( port )

    def request( self, verb, url, input, headers ):
        fixAuthorizationHeader( headers )
        expectation = self.__file.readline().strip()
        self.__testCase.assertEqual( self.__protocol + " " + verb + " " + self.__host + " " + self.__port + " " + url + " " + str( headers ) + " " + input, expectation )

    def getresponse( self ):
        status = int( self.__file.readline().strip() )
        headers = eval( self.__file.readline().strip() )
        output = self.__file.readline().strip()

        return FakeHttpResponse( status, headers, output )

    def close( self ):
        self.__file.readline()

def ReplayingHttpConnection( testCase, file, *args, **kwds ):
    return ReplayingConnection( testCase, file, "http", *args, **kwds )

def ReplayingHttpsConnection( testCase, file, *args, **kwds ):
    return ReplayingConnection( testCase, file, "https", *args, **kwds )

class BasicTestCase( unittest.TestCase ):
    recordMode = False

    def setUp( self ):
        unittest.TestCase.setUp( self )
        self.__fileName = ""
        self.__file = None
        if self.recordMode:
            github.Requester.Requester.injectConnectionClasses(
                lambda ignored, *args, **kwds: RecordingHttpConnection( self.__openFile( "wb" ), *args, **kwds ),
                lambda ignored, *args, **kwds: RecordingHttpsConnection( self.__openFile( "wb" ), *args, **kwds )
            )
            import GithubCredentials
            self.login = GithubCredentials.login
            self.password = GithubCredentials.password
            self.oauth_token = GithubCredentials.oauth_token
        else:
            github.Requester.Requester.injectConnectionClasses(
                lambda ignored, *args, **kwds: ReplayingHttpConnection( self, self.__openFile( "r" ), *args, **kwds ),
                lambda ignored, *args, **kwds: ReplayingHttpsConnection( self, self.__openFile( "r" ), *args, **kwds )
            )
            self.login = "login"
            self.password = "password"
            self.oauth_token = "oauth_token"

    def tearDown( self ):
        unittest.TestCase.tearDown( self )
        self.__closeReplayFileIfNeeded()

    def __openFile( self, mode ):
        for ( _, _, functionName, _ ) in traceback.extract_stack():
            if functionName.startswith( "test" ) or functionName == "setUp" or functionName == "tearDown":
                if functionName != "test": # because in class Hook( Framework.TestCase ), method testTest calls Hook.test
                    fileName = os.path.join( os.path.dirname( __file__ ), "ReplayData", self.__class__.__name__ + "." + functionName + ".txt" )
        if fileName != self.__fileName:
            self.__closeReplayFileIfNeeded()
            self.__fileName = fileName
            self.__file = open( self.__fileName, mode )
        return self.__file

    def __closeReplayFileIfNeeded( self ):
        if self.__file is not None:
            if not self.recordMode:
                self.assertEqual( self.__file.readline(), "" )
            self.__file.close()

    def assertListKeyEqual( self, elements, key, expectedKeys ):
        realKeys = [ key( element ) for element in elements ]
        self.assertEqual( realKeys, expectedKeys )

    def assertListKeyBegin( self, elements, key, expectedKeys ):
        realKeys = [ key( element ) for element in elements[ : len( expectedKeys ) ] ]
        self.assertEqual( realKeys, expectedKeys )

class TestCase( BasicTestCase ):
    def setUp( self ):
        BasicTestCase.setUp( self )
        self.g = github.Github( self.login, self.password )

def activateRecordMode():
    BasicTestCase.recordMode = True