#!powershell

# Copyright: (c) 2017, Dag Wieers (@dagwieers) <dag@wieers.com>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

#Requires -Module Ansible.ModuleUtils.Legacy

Function New-TempFile {
    Param ([string]$path, [string]$prefix, [string]$suffix, [string]$type, [bool]$checkmode)
    $temppath = $null
    $attempt = 0

    # Since we don't know if the file already exists, we try 5 times with a random name
    do {
        $attempt += 1
        $randomname = [System.IO.Path]::GetRandomFileName()
        $temppath = (Join-Path -Path $path -ChildPath "$prefix$randomname$suffix")
        Try {
            $file = New-Item -Path $temppath -ItemType $type -WhatIf:$checkmode
            # Makes sure we get the full absolute path of the created temp file and not a relative or DOS 8.3 dir
            if (-not $checkmode) {
                $temppath = $file.FullName
            } else {
                # Just rely on GetFulLpath for check mode
                $temppath = [System.IO.Path]::GetFullPath($temppath)
            }
        } Catch {
            $temppath = $null
            $error = $_.Exception.Message
        }
    } until ($temppath -ne $null -or $attempt -ge 5)

    # If it fails 5 times, something is wrong and we have to report the details
    if ($temppath -eq $null) {
        Fail-Json @{} "No random temporary file worked in $attempt attempts. Error: $error"
    }

    return $temppath
}

$ErrorActionPreference = "Stop"

$params = Parse-Args $args -supports_check_mode $true
$check_mode = Get-AnsibleParam -obj $params -name "_ansible_check_mode" -type "bool" -default $false

$path = Get-AnsibleParam -obj $params -name "path" -type "path" -default "%TEMP%" -aliases "dest"
$state = Get-AnsibleParam -obj $params -name "state" -type "str" -default "file" -validateset "file","directory"
$prefix = Get-AnsibleParam -obj $params -name "prefix" -type "str" -default "ansible."
$suffix = Get-AnsibleParam -obj $params -name "suffix" -type "str"

# Expand environment variables on non-path types
$prefix = Expand-Environment($prefix)
$suffix = Expand-Environment($suffix)

$result = @{
    changed = $true
    state = $state
}

$result.path = New-TempFile -Path $path -Prefix $prefix -Suffix $suffix -Type $state -CheckMode $check_mode

Exit-Json $result