# Copyright (c) 2020-202x The virtualenv developers
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

$script:THIS_PATH = $myinvocation.mycommand.path
$script:BASE_DIR = Split-Path (Resolve-Path "$THIS_PATH/..") -Parent

function global:deactivate([switch] $NonDestructive) {
    if (Test-Path variable:_OLD_VIRTUAL_PATH) {
        $env:PATH = $variable:_OLD_VIRTUAL_PATH
        Remove-Variable "_OLD_VIRTUAL_PATH" -Scope global
    }

    if (Test-Path function:_old_virtual_prompt) {
        $function:prompt = $function:_old_virtual_prompt
        Remove-Item function:\_old_virtual_prompt
    }

    if ($env:VIRTUAL_ENV) {
        Remove-Item env:VIRTUAL_ENV -ErrorAction SilentlyContinue
    }

    if ($env:VIRTUAL_ENV_PROMPT) {
        Remove-Item env:VIRTUAL_ENV_PROMPT -ErrorAction SilentlyContinue
    }

    if (!$NonDestructive) {
        # Self destruct!
        Remove-Item function:deactivate
        Remove-Item function:pydoc
    }
}

function global:pydoc {
    python -m pydoc $args
}

# unset irrelevant variables
deactivate -nondestructive

$VIRTUAL_ENV = $BASE_DIR
$env:VIRTUAL_ENV = $VIRTUAL_ENV

if ("" -ne "") {
    $env:VIRTUAL_ENV_PROMPT = ""
}
else {
    $env:VIRTUAL_ENV_PROMPT = $( Split-Path $env:VIRTUAL_ENV -Leaf )
}

New-Variable -Scope global -Name _OLD_VIRTUAL_PATH -Value $env:PATH

$env:PATH = "$env:VIRTUAL_ENV/bin:" + $env:PATH
if (!$env:VIRTUAL_ENV_DISABLE_PROMPT) {
    function global:_old_virtual_prompt {
        ""
    }
    $function:_old_virtual_prompt = $function:prompt

    function global:prompt {
        # Add the custom prefix to the existing prompt
        $previous_prompt_value = & $function:_old_virtual_prompt
        ("(" + $env:VIRTUAL_ENV_PROMPT + ") " + $previous_prompt_value)
    }
}
