from test.vim_test_case import VimTestCase as _VimTest
from test.constant import *


def check_required_vim_version(test):
    if test.vim_flavor == 'neovim':
        return None
    if not test.vim.has_version(7, 4, 1):
        return 'Vim newer than 7.4.1 is required'
    else:
        return None


# Undo of Snippet insertion  {{{#


class Undo_RemoveMultilineSnippet(_VimTest):
    snippets = ('test', 'Hello\naaa ${1} bbb\nWorld')
    keys = 'test' + EX + ESC + 'u'
    wanted = 'test'


class Undo_RemoveEditInTabstop(_VimTest):
    snippets = ('test', '$1 Hello\naaa ${1} bbb\nWorld')
    keys = 'hello test' + EX + 'upsi' + ESC + 'hh' + 'iabcdef' + ESC + 'u'
    wanted = 'hello upsi Hello\naaa upsi bbb\nWorld'


class Undo_RemoveWholeSnippet(_VimTest):
    snippets = ('test', 'Hello\n${1:Hello}World')
    keys = 'first line\n\n\n\n\n\nthird line' + \
        ESC + '3k0itest' + EX + ESC + 'u6j'
    wanted = 'first line\n\n\ntest\n\n\nthird line'


class Undo_RemoveOneSnippetByTime(_VimTest):
    snippets = ('i', 'if:\n\t$1')
    keys = 'i' + EX + 'i' + EX + ESC + 'u'
    wanted = 'if:\n\ti'


class Undo_RemoveOneSnippetByTime2(_VimTest):
    snippets = ('i', 'if:\n\t$1')
    keys = 'i' + EX + 'i' + EX + ESC + 'uu'
    wanted = 'if:\n\t'


class Undo_ChangesInPlaceholder(_VimTest):
    snippets = ('i', 'if $1:\n\t$2')
    keys = 'i' + EX + 'asd' + JF + ESC + 'u'
    wanted = 'if :\n\t'


class Undo_CompletelyUndoSnippet(_VimTest):
    snippets = ('i', 'if $1:\n\t$2')
    # undo 'feh'
    # undo 'asd'
    # undo snippet expansion
    # undo entering of 'i'
    keys = 'i' + EX + 'asd' + JF + 'feh' + ESC + 'uuuu'
    wanted = ''


class JumpForward_DefSnippet(_VimTest):
    snippets = (
        'test',
        "${1}\n`!p snip.rv = '\\n'.join(t[1].split())`\n\n${0:pass}")
    keys = 'test' + EX+ 'a b c' + JF + 'shallnot'
    wanted = 'a b c\na\nb\nc\n\nshallnot'


class DeleteSnippetInsertion0(_VimTest):
    snippets = ('test', '${1:hello} $1')
    keys = 'test' + EX + ESC + 'Vkx' + 'i\nworld\n'
    wanted = 'world'


class DeleteSnippetInsertion1(_VimTest):
    snippets = ('test', r"$1${1/(.*)/(?0::.)/}")
    keys = 'test' + EX + ESC + 'u'
    wanted = 'test'

class DoNotCrashOnUndoAndJumpInNestedSnippet(_VimTest):
    snippets = ('test', r"if $1: $2")
    keys = 'test' + EX + 'a' + JF + 'test' + EX + ESC + 'u' + JF
    wanted = 'if a: test'
# End: Undo of Snippet insertion  #}}}

# Normal mode editing  {{{#
# Test for bug #927844


class DeleteLastTwoLinesInSnippet(_VimTest):
    snippets = ('test', '$1hello\nnice\nworld')
    keys = 'test' + EX + ESC + 'j2dd'
    wanted = 'hello'


class DeleteCurrentTabStop1_JumpBack(_VimTest):
    snippets = ('test', '${1:hi}\nend')
    keys = 'test' + EX + ESC + 'ddi' + JB
    wanted = 'end'


class DeleteCurrentTabStop2_JumpBack(_VimTest):
    snippets = ('test', '${1:hi}\n${2:world}\nend')
    keys = 'test' + EX + JF + ESC + 'ddi' + JB + 'hello'
    wanted = 'hello\nend'


class DeleteCurrentTabStop3_JumpAround(_VimTest):
    snippets = ('test', '${1:hi}\n${2:world}\nend')
    keys = 'test' + EX + JF + ESC + 'ddkji' + JB + 'hello' + JF + 'world'
    wanted = 'hello\nendworld'

# End: Normal mode editing  #}}}

# Pressing BS in TabStop  {{{#
# Test for Bug #774917


class Backspace_TabStop_Zero(_VimTest):
    snippets = ('test', 'A${1:C} ${0:DDD}', 'This is Case 1')
    keys = 'test' + EX + 'A' + JF + BS + 'BBB'
    wanted = 'AA BBB'


class Backspace_TabStop_NotZero(_VimTest):
    snippets = ('test', 'A${1:C} ${2:DDD}', 'This is Case 1')
    keys = 'test' + EX + 'A' + JF + BS + 'BBB'
    wanted = 'AA BBB'
# End: Pressing BS in TabStop  #}}}

class UpdateModifiedSnippetWithoutCursorMove1(_VimTest):
    skip_if = check_required_vim_version
    snippets = ('test', '${1:one}(${2:xxx})${3:three}')
    keys = 'test' + EX + 'aaaaa' + JF + BS + JF + '3333'
    wanted = 'aaaaa()3333'

class UpdateModifiedSnippetWithoutCursorMove2(_VimTest):
    skip_if = check_required_vim_version
    snippets = ('test', '''\
private function ${1:functionName}(${2:arguments}):${3:Void}
{
    ${VISUAL}$0
}''')
    keys = 'test' + EX + 'a' + JF + BS + JF + 'Int' + JF + 'body'
    wanted = '''\
private function a():Int
{
    body
}'''