# Copyright (c) 2026, R. W. Rodolico
# All rights reserved.
#
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# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# windows_software.ps1
# Installed software from the registry Uninstall keys (never Win32_Product).
# Sensor contract: unix/sensors/Documentation/README.md; keys: Documentation/Spec.md 7.6
# Must stay Windows PowerShell 5.1 compatible and pure ASCII.
#
# Version 1.0.0 20261018 Claude
# Initial version (bug 211, stage W2)

Import-Module ([IO.Path]::Combine($PSScriptRoot, '..', 'lib', 'SysinfoSensor.psm1'))
Test-SysinfoWindows

Invoke-SysinfoSensor {
   $uninstall = 'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall'
   $seen = @{}
   foreach ($view in [Microsoft.Win32.RegistryView]::Registry64, [Microsoft.Win32.RegistryView]::Registry32) {
      $base = [Microsoft.Win32.RegistryKey]::OpenBaseKey([Microsoft.Win32.RegistryHive]::LocalMachine, $view)
      try {
         $root = $base.OpenSubKey($uninstall)
         if ($null -eq $root) { continue }
         try {
            foreach ($subName in $root.GetSubKeyNames()) {
               $sub = $root.OpenSubKey($subName)
               if ($null -eq $sub) { continue }
               try {
                  $display = ([string]$sub.GetValue('DisplayName', '')).Trim()
                  if ($display -eq '') { continue }
                  if ([string]$sub.GetValue('SystemComponent', '0') -eq '1') { continue }
                  if (([string]$sub.GetValue('ParentKeyName', '')) -ne '') { continue }
                  if (@('Update', 'Hotfix', 'Security Update') -contains ([string]$sub.GetValue('ReleaseType', ''))) { continue }
                  if ($seen.ContainsKey($display)) { continue }
                  $seen[$display] = $true
                  Write-SysinfoFact -Path @('software', $display, 'version') -Value $sub.GetValue('DisplayVersion', '')
                  Write-SysinfoFact -Path @('software', $display, 'description') -Value $sub.GetValue('Publisher', '')
               } finally { $sub.Close() }
            }
         } finally { $root.Close() }
      } finally { $base.Close() }
   }
}