Param(
  [string]$reinstall = "ask",
  [string]$TEMP = $env:TEMP,
  [string]$PYTHON = "C:\Python27",
  [string]$StartMenu = "$env:USERPROFILE\AppData\Roaming\Microsoft\Windows\Start Menu\Programs",
 #[string]$UsrFolder = $MyInvocation.MyCommand.Path -replace ("([\\/][^\\/]+){4}$",""),
  [string]$ProgramFiles = "%ProgramFiles(x86)%",
 #[string]$UninstallPath = "$UsrFolder\share\streamtuner2\dev\uninstall.cmd",
 #[string]$IconPath = "$UsrFolder\share\pixmaps\streamtuner2.ico",
  [string]$AboutLink = "http://freshcode.club/projects/streamtuner2"
 #[string]$ModifyPath = $MyInvocation.MyCommand.Path -replace (".ps1", ".bat")
  [string]$AboutLink = "http://freshcode.club/projects/streamtuner2",
  [string]$VERSION = "2.2.0"
)            

#-- paths
$UsrFolder = $MyInvocation.MyCommand.Path -replace ("([\\/][^\\/]+){4}$","")
$UninstallPath = "$UsrFolder\share\streamtuner2\dev\uninstall.cmd"
$ModifyPath = $MyInvocation.MyCommand.Path -replace ("[.]ps1$", ".bat")
$IconPath = "$UsrFolder\share\pixmaps\streamtuner2.ico"

#-- system configuration
$ErrorActionPreference = "SilentlyContinue"  # ignore all path/registry lookup errors
$OutputEncoding = [System.Text.Encoding]::UTF8
$regPathCU = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall"
$regPathLM = "HKLM:\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall" #64-Bit machine
if(!(Test-Path $regPathLM)) {                                                        #32-Bit machine
    $regPathLM = "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall"
    $ProgramFiles = "%ProgramFiles%"
}
$STREAMRIPPER = "$ProgramFiles\Streamripper"
New-Variable -Name STREAMRIPPER -Option AllScope -Value "$ProgramFiles\Streamripper"


#-- what and how to install
#   each row is a list of (title, url, cmd, msi args, regkey, pathcheck, is_optional, prelookup)
$tasks = @(
  @(
    "Python 2.7.12",                                                  # title

  ),
  @(
    "PyGtk 2.24.2",
    "http://ftp.gnome.org/pub/GNOME/binaries/win32/pygtk/2.24/pygtk-all-in-one-2.24.2.win32-py2.7.msi",
    "",
    'TARGETDIR="{PYTHON}" ADDLOCAL=ALL REMOVE=PythonExtensionModulePyGtkSourceview2,PythonExtensionModulePyGoocanvas,PythonExtensionModulePyRsvg,DevelopmentTools /qb-!',
    "$regPathLM\{09F82967-D26B-48AC-830E-33191EC177C8}",
    "$regPathLM\{09F82967-D26B-48AC-830E-33191EC177C8}",
#    "$regPathLM\{09F82967-D26B-48AC-830E-33191EC177C8}",
    "{PYTHON}\Lib\site-packages\gtk-2.0\pygtk-2.24.0-py2.7.egg-info",
    "",
    ''
  ),
  @(
    "Python requests",
    "requests", # no download url, pip handles this
    "easy_install",

    "Streamripper 1.64.6",
    "https://netcologne.dl.sourceforge.net/project/streamripper/streamripper%20%28current%29/1.64.6/streamripper-windows-installer-1.64.6.exe",
    "",
    "/S  /D={STREAMRIPPER}"  #NSIS does not use double quotes in /D parm,
    "$regPathLM\Streamripper",
    "{STREAMRIPPER}\streamripper.exe",
    '($true)',     # ← could use '((Ask "Install streamripper too [y/N]") -match N)' instead
    '(($_found = (Get-ITPV "Streamripper")) -AND ($script:STREAMRIPPER = $_found))'  # look up path in Check-Prerequisites
    '($optionalInstall -AND ($_found = (Get-ITPV "Streamripper")) -AND ($STREAMRIPPER = $_found) -OR ((!$optionalInstall) -AND $STREAMRIPPER=""))'  # look up path in Check-Prerequisites
  ),
  @(
    "Uninstall script",
    "",
    'Create-Uninstallscript'
  ),
  @(

|           ______\////\\\____________\/\\\______________/\\\//_____          |
|            _________\////\\\_________\/\\\___________/\\\//________         |
|             __/\\\______\//\\\________\/\\\_________/\\\/___________        |
|              _\///\\\\\\\\\\\/_________\/\\\________/\\\\\\\\\\\\\\\_       |
|               ___\///////////___________\///________\///////////////__      |
|                                                                             |
|                                                                             |
|    Streamtuner2 for Windows                               Version 2.2.0     |
|    Streamtuner2 for Windows                               Version $VERSION     |
|                                                                             |
|    Installer for Python 2.7.12 & Gtk 2.24.2                                 |
 ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– 
"@
}
function Ask-First {
    Write-Host ""
    if ((Ask "Do you want install Streamtuner2 and its Python dependencies now? [Y/n] ") -notmatch "^[yY]|^$") {
        $tasks = $tasks[7..($tasks.length-1)]
        #$tasks = $tasks[7..($tasks.length-1)]; return 0,0
        exit
    }
#   $reuseCachedFiles = (Ask "Reuse any cached setup files? [r]euse/[I]gnore) ") -match "^[Rr]"
    $reuseCachedFiles = (Ask "Reuse any cached setup files or ignore them? [r/I] ") -match "^[Rr]"
    $optionalInstall =  (Ask "Install optional components? [y/N] ") -match "^[Yy]"
    Write-Host ""
    return $reuseCachedFiles, $optionalInstall
}

function Console-MaxHeight {

    $lnk.Save()
}

#-- create uninstall script and registry key
function Create-Uninstallscript {
    [CmdletBinding()]
    param()
    #Write-Host " → Creating uninstall script"
    # update uninstall.cmd with current values
    $installFolder = $usrFolder.substring(0,$usrFolder.LastIndexOf('\'))
    $UninstallScript = Get-Content -Path $UninstallPath
    Out-File -FilePath $UninstallPath -Encoding ascii -InputObject @"
@set installFolder=$installFolder
@set usrFolder=$usrFolder
@set Python=$PYTHON
@set StreamripperFolder=$STREAMRIPPER
"@
    for ($i=4; $i -lt $UninstallScript.Length ; $i++) {
        Out-File -FilePath $UninstallPath -Encoding ascii -Append -InputObject $UninstallScript[$i]
    $UninstallScript | %{if ($_ -notmatch "@set") {Out-File -FilePath $UninstallPath -Encoding ascii -Append -InputObject $_}} 
    }
    # registry entry for ST2
    Remove-Item -Path $regPathCU\Streamtuner2 2> $null        
    New-Item $regPathCU -Name "Streamtuner2" > $null
    Set-Location -Path $regPathCU\Streamtuner2
    @(
    New-ItemProperty -Path . -Name DisplayName -PropertyType String -Value "Streamtuner2" > $null
    New-ItemProperty -Path . -Name DisplayVersion -PropertyType String -Value "2.2.0" > $null
    New-ItemProperty -Path . -Name DisplayIcon -PropertyType String -Value "$IconPath" > $null
    New-ItemProperty -Path . -Name UninstallString -PropertyType String -Value "$UninstallPath" > $null
    New-ItemProperty -Path . -Name URLInfoAbout -PropertyType String -Value "$AboutLink" > $null
    New-ItemProperty -Path . -Name Publisher -PropertyType String -Value "Mario Salzer" > $null
    New-ItemProperty -Path . -Name NoModify -PropertyType DWord -Value 0 > $null
    New-ItemProperty -Path . -Name ModifyPath -PropertyType String -Value "$ModifyPath" > $null
    New-ItemProperty -Path . -Name NoRepair -PropertyType DWord -Value 1 > $null
    New-ItemProperty -Path . -Name HelpLink -PropertyType String -Value "http://fossil.include-once.org/streamtuner2/wiki?name=windows" > $null
        @("DisplayName",     "String",  "Streamtuner2"),
        @("DisplayVersion",  "String",  "$VERSION"),
        @("DisplayIcon",     "String",  "$IconPath"),
        @("UninstallString", "String",  "$UninstallPath"),
        @("URLInfoAbout",    "String",  "$AboutLink"),
        @("Publisher",       "String",  "Mario Salzer"),
        @("NoModify",        "DWord",   0x00000000),
        @("ModifyPath",      "String",  "$ModifyPath"),
        @("NoRepair",        "DWord",   0x00000001),
        @("HelpLink",        "String",  "http://fossil.include-once.org/streamtuner2/wiki/windows")
    #}
    ) | % {
        New-ItemProperty -Path . -Name $_[0] -PropertyType $_[1] -Value $_[2] > $null
    }
}

#-- wait for keypress
function Any-Key($color) {
    Write-Host -f $color "[Press any key]"
    $null = $host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
}

#-- check prereqs installation
function Check-Prerequisites {
    [CmdletBinding()]
    param($result = 1)
    ForEach ($task in $tasks) {
        $title, $url, $cmd, $args, $regkey, $checkpath, $is_optional, $presearch, $_found = $task;
        $checkpath = $checkpath -replace "{PYTHON}","$PYTHON"
        if (($is_optional -and !$optionalInstall) -or (!$regkey -and !$checkpath)) {
        #if ($is_optional -and !$optionalInstall) {
        #    $STREAMRIPPER = ""
        #    continue
        #}
        if (!$regkey -and !$checkpath) {
            continue
        }
        if ($presearch) {  # expression for e.g. registry → path lookup
            Invoke-Expression $presearch > $null # should set $_found + global $PLACEHOLDER variable
        }
        elseif ($checkpath) {
            if (Test-Path $checkpath) {
                $_found = $checkpath
            }
        }
        elseif ($regkey -and (Test-Path $regkey)) {
            $_found = "installer/registry"
            elseif ($regkey -and (Test-Path $regkey)) {
                $_found = "installer/registry"
            }
        }
        if (!$_found) {
            Write-Host "   - $title not found"
            $result = 0;
        }
        else {
            Write-Host -n "   + $title found "  # and display shortened path:

Check-Prerequisites


#-- process
:tasks ForEach ($task in $tasks) {
    $title, $url, $cmd, $args, $regkey, $testpath, $is_optional, $presearch = $task | 
       % { [regex]::Replace($_, "[#{](\w+)[}#]", { param($m) Invoke-Expression ("$"+$m.Groups[1].Value) }) }

    # options
    if ($is_optional -AND (Invoke-Expression $is_optional) -AND !$optionalInstall) {
        continue    # optional expression test
    }

    # print step
    if ($title -match "\d+\.\d+") { $title = "Installing $title" }