# Copyright (C) 2016 YouCompleteMe Contributors
#
# This file is part of YouCompleteMe.
#
# YouCompleteMe 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.
#
# YouCompleteMe 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 YouCompleteMe.  If not, see <http://www.gnu.org/licenses/>.

from __future__ import unicode_literals
from __future__ import print_function
from __future__ import division
from __future__ import absolute_import
# Not installing aliases from python-future; it's unreliable and slow.
from builtins import *  # noqa

from ycm.tests.test_utils import ExtendedMock, MockVimModule
MockVimModule()

import json
from mock import patch, call
from nose.tools import ok_
from ycm.client.command_request import CommandRequest


class GoToResponse_QuickFix_test( object ):
  """This class tests the generation of QuickFix lists for GoTo responses which
  return multiple locations, such as the Python completer and JavaScript
  completer. It mostly proves that we use 1-based indexing for the column
  number."""

  def setUp( self ):
    self._request = CommandRequest( [ 'GoToTest' ] )


  def tearDown( self ):
    self._request = None


  def GoTo_EmptyList_test( self ):
    self._CheckGoToList( [], [] )


  def GoTo_SingleItem_List_test( self ):
    self._CheckGoToList( [ {
      'filepath':     'dummy_file',
      'line_num':     10,
      'column_num':   1,
      'description': 'this is some text',
    } ], [ {
      'filename':    'dummy_file',
      'text':        'this is some text',
      'lnum':        10,
      'col':         1
    } ] )


  def GoTo_MultiItem_List_test( self ):
    self._CheckGoToList( [ {
      'filepath':     'dummy_file',
      'line_num':     10,
      'column_num':   1,
      'description': 'this is some other text',
    }, {
      'filepath':     'dummy_file2',
      'line_num':     1,
      'column_num':   21,
      'description': 'this is some text',
    } ], [ {
      'filename':    'dummy_file',
      'text':        'this is some other text',
      'lnum':        10,
      'col':         1
    }, {
      'filename':    'dummy_file2',
      'text':        'this is some text',
      'lnum':        1,
      'col':         21
    } ] )


  @patch( 'ycm.vimsupport.VariableExists', return_value = True )
  @patch( 'ycm.vimsupport.SetFittingHeightForCurrentWindow' )
  @patch( 'vim.command', new_callable = ExtendedMock )
  @patch( 'vim.eval', new_callable = ExtendedMock )
  def _CheckGoToList( self,
                      completer_response,
                      expected_qf_list,
                      vim_eval,
                      vim_command,
                      set_fitting_height,
                      variable_exists ):
    self._request._response = completer_response

    self._request.RunPostCommandActionsIfNeeded()

    vim_eval.assert_has_exact_calls( [
      call( 'setqflist( {0} )'.format( json.dumps( expected_qf_list ) ) )
    ] )
    vim_command.assert_has_exact_calls( [
      call( 'botright copen' ),
      call( 'au WinLeave <buffer> q' ),
      call( 'doautocmd User YcmQuickFixOpened' )
    ] )
    set_fitting_height.assert_called_once_with()


class Response_Detection_test( object ):

  def BasicResponse_test( self ):
    def _BasicResponseTest( command, response ):
      with patch( 'vim.command' ) as vim_command:
        request = CommandRequest( [ command ] )
        request._response = response
        request.RunPostCommandActionsIfNeeded()
        vim_command.assert_called_with( "echo '{0}'".format( response ) )

    tests = [
      [ 'AnythingYouLike',        True ],
      [ 'GoToEvenWorks',          10 ],
      [ 'FixItWorks',             'String!' ],
      [ 'and8434fd andy garbag!', 10.3 ],
    ]

    for test in tests:
      yield _BasicResponseTest, test[ 0 ], test[ 1 ]


  def FixIt_Response_Empty_test( self ):
    # Ensures we recognise and handle fixit responses which indicate that there
    # are no fixits available
    def EmptyFixItTest( command ):
      with patch( 'ycm.vimsupport.ReplaceChunks' ) as replace_chunks:
        with patch( 'ycm.vimsupport.PostVimMessage' ) as post_vim_message:
          request = CommandRequest( [ command ] )
          request._response = {
            'fixits': []
          }
          request.RunPostCommandActionsIfNeeded()

          post_vim_message.assert_called_with(
            'No fixits found for current line', warning = False )
          replace_chunks.assert_not_called()

    for test in [ 'FixIt', 'Refactor', 'GoToHell', 'any_old_garbade!!!21' ]:
      yield EmptyFixItTest, test


  def FixIt_Response_test( self ):
    # Ensures we recognise and handle fixit responses with some dummy chunk data
    def FixItTest( command, response, chunks, selection ):
      with patch( 'ycm.vimsupport.ReplaceChunks' ) as replace_chunks:
        with patch( 'ycm.vimsupport.PostVimMessage' ) as post_vim_message:
          with patch( 'ycm.vimsupport.SelectFromList',
                      return_value = selection ):
            request = CommandRequest( [ command ] )
            request._response = response
            request.RunPostCommandActionsIfNeeded()

            replace_chunks.assert_called_with( chunks )
            post_vim_message.assert_not_called()

    basic_fixit = {
      'fixits': [ {
        'chunks': [ {
          'dummy chunk contents': True
        } ]
      } ]
    }
    basic_fixit_chunks = basic_fixit[ 'fixits' ][ 0 ][ 'chunks' ]

    multi_fixit = {
      'fixits': [ {
        'text': 'first',
        'chunks': [ {
          'dummy chunk contents': True
        } ]
      }, {
        'text': 'second',
        'chunks': [ {
          'dummy chunk contents': False
        }]
      } ]
    }
    multi_fixit_first_chunks = multi_fixit[ 'fixits' ][ 0 ][ 'chunks' ]
    multi_fixit_second_chunks = multi_fixit[ 'fixits' ][ 1 ][ 'chunks' ]

    tests = [
      [ 'AnythingYouLike',        basic_fixit, basic_fixit_chunks, 0 ],
      [ 'GoToEvenWorks',          basic_fixit, basic_fixit_chunks, 0 ],
      [ 'FixItWorks',             basic_fixit, basic_fixit_chunks, 0 ],
      [ 'and8434fd andy garbag!', basic_fixit, basic_fixit_chunks, 0 ],
      [ 'select from multiple 1',   multi_fixit, multi_fixit_first_chunks, 0 ],
      [ 'select from multiple 2',   multi_fixit, multi_fixit_second_chunks, 1 ],
    ]

    for test in tests:
      yield FixItTest, test[ 0 ], test[ 1 ], test[ 2 ], test[ 3 ]


  def Message_Response_test( self ):
    # Ensures we correctly recognise and handle responses with a message to show
    # to the user

    def MessageTest( command, message ):
      with patch( 'ycm.vimsupport.PostVimMessage' ) as post_vim_message:
        request = CommandRequest( [ command ] )
        request._response = { 'message': message }
        request.RunPostCommandActionsIfNeeded()
        post_vim_message.assert_called_with( message, warning = False )

    tests = [
      [ '___________', 'This is a message' ],
      [ '',            'this is also a message' ],
      [ 'GetType',     'std::string' ],
    ]

    for test in tests:
      yield MessageTest, test[ 0 ], test[ 1 ]


  def Detailed_Info_test( self ):
    # Ensures we correctly detect and handle detailed_info responses which are
    # used to display information in the preview window

    def DetailedInfoTest( command, info ):
      with patch( 'ycm.vimsupport.WriteToPreviewWindow' ) as write_to_preview:
        request = CommandRequest( [ command ] )
        request._response = { 'detailed_info': info }
        request.RunPostCommandActionsIfNeeded()
        write_to_preview.assert_called_with( info )

    tests = [
      [ '___________', 'This is a message' ],
      [ '',            'this is also a message' ],
      [ 'GetDoc',      'std::string\netc\netc' ],
    ]

    for test in tests:
      yield DetailedInfoTest, test[ 0 ], test[ 1 ]


  def GoTo_Single_test( self ):
    # Ensures we handle any unknown type of response as a GoTo response

    def GoToTest( command, response ):
      with patch( 'ycm.vimsupport.JumpToLocation' ) as jump_to_location:
        request = CommandRequest( [ command ] )
        request._response = response
        request.RunPostCommandActionsIfNeeded()
        jump_to_location.assert_called_with(
            response[ 'filepath' ],
            response[ 'line_num' ],
            response[ 'column_num' ] )

    def GoToListTest( command, response ):
      # Note: the detail of these called are tested by
      # GoToResponse_QuickFix_test, so here we just check that the right call is
      # made
      with patch( 'ycm.vimsupport.SetQuickFixList' ) as set_qf_list:
        with patch( 'ycm.vimsupport.OpenQuickFixList' ) as open_qf_list:
          request = CommandRequest( [ command ] )
          request._response = response
          request.RunPostCommandActionsIfNeeded()
          ok_( set_qf_list.called )
          ok_( open_qf_list.called )

    basic_goto = {
      'filepath': 'test',
      'line_num': 10,
      'column_num': 100,
    }

    tests = [
      [ GoToTest,     'AnythingYouLike', basic_goto ],
      [ GoToTest,     'GoTo',            basic_goto ],
      [ GoToTest,     'FindAThing',      basic_goto ],
      [ GoToTest,     'FixItGoto',       basic_goto ],
      [ GoToListTest, 'AnythingYouLike', [ basic_goto ] ],
      [ GoToListTest, 'GoTo',            []  ],
      [ GoToListTest, 'FixItGoto',       [ basic_goto, basic_goto ] ],
    ]

    for test in tests:
      yield test[ 0 ], test[ 1 ], test[ 2 ]