# Brett Paufler
# Copyright
# 2019-08-16
#
# PowerShell Script
# Saved as a txt file 
#
# Face Flip
# Flips an image and combines the original with the flipped
# Front-to-Front   and   Back-to-Back
#
# Given the right input, creates a face of sorts
#
# File Names Cannot Have Spaces



$gm = 'c:\alpha\graphicsmagick\gm.exe convert '

$DIR_IN = 'C:\alpha\input'
$DIR_OUT = 'C:\alpha\output'


$images = Get-ChildItem -Name $DIR_IN

ForEach ($image in $images)
    {
    #Temporary Image Paths
    $image_in = Join-Path -Path $DIR_IN $image
    $sn_temp_a = Join-Path -Path $DIR_OUT $image.Replace('.', '___a.')                     
    $sn_temp_b = Join-Path -Path $DIR_OUT $image.Replace('.', '___b.')             
    $sn_face_a = $sn_temp_a.Replace('___a.', '_flip_a.')
    $sn_face_b = $sn_temp_b.Replace('___b.', '_flip_b.')
    #$image_in
    #$sn_temp_a
    #$sn_temp_b
    #$sn_face_a
    #$sn_face_b

    'Working on... ' + $image_in

    
    #Temp A Image
    $command = $gm + $image_in + ' ' + $sn_temp_a
    Invoke-Expression $command

    #Temp B Image
    $command = $gm + '-flop ' + $image_in + ' ' + $sn_temp_b
    Invoke-Expression $command

    #Flip Front A
    $command = $gm + '+append ' + ' ' + $sn_temp_a + ' ' + $sn_temp_b + ' ' + $sn_face_a
    Invoke-Expression $command

    #Flip Back B
    $command = $gm + '+append ' + ' ' + $sn_temp_b + ' ' + $sn_temp_a + ' ' + $sn_face_b
    Invoke-Expression $command

    #Clean Up
    #Remove Temporary Images
    Remove-Item $sn_temp_a
    Remove-Item $sn_temp_b

    }

'FaceFlip Terminated w/o Errors'