#Requires -Version 5.1
<#
    JbTecWiz Support Centre -- generated fix script

    Fault : Windows Search finds nothing, or the Start menu does not open
    Fix   : Rebuild the search index
    Source: https://jbtecwiz.com/support/win-app-store-reset

    Run as     : Elevated PowerShell
    Expect     : 20 minutes plus rebuild time
    Risk       : low
    Reversible : yes

    WHEN THIS IS THE RIGHT FIX
    Search returns nothing but Start opens normally.

    HOW TO UNDO IT
    Nothing to roll back -- the index is derived data.

    This script walks the fix one step at a time and asks before each
    one. Steps with no command are things you do yourself -- it prints
    those and waits. Run with -DryRun to print without executing.

    --------------------------------------------------------------------
    NO WARRANTY - USE AT YOUR OWN RISK

    This script is provided by JbTecWiz as-is and with no warranty of any
    kind, express or implied. You run it entirely at your own risk.

    JbTecWiz accepts no liability for any loss or damage arising from its
    use, including but not limited to data loss, downtime, or configuration
    changes that turn out to be wrong for your system.

    You are responsible for reading this script before running it, for
    satisfying yourself that it suits the machine in front of you, and for
    having a working backup first. Some steps cannot be undone.
    --------------------------------------------------------------------
#>

[CmdletBinding()]
param(
    # Print every step and command without running anything.
    [switch]$DryRun,
    # Do not ask before each step. Read the script first if you use this.
    [switch]$Unattended
)

$ErrorActionPreference = 'Stop'
$script:Failed = 0

function Write-Rule { param([string]$Text)
    Write-Host ''
    Write-Host ('-' * 70) -ForegroundColor DarkGray
    if ($Text) { Write-Host $Text -ForegroundColor Cyan }
}

function Show-Prose { param([string]$Text, [string]$Colour = "Gray")
    if (-not $Text) { return }
    $words = $Text -split "\s+"; $line = "  "
    foreach ($w in $words) {
        if (($line.Length + $w.Length) -gt 74) { Write-Host $line -ForegroundColor $Colour; $line = "  " }
        $line += "$w "
    }
    if ($line.Trim()) { Write-Host $line -ForegroundColor $Colour }
}

function Invoke-Step {
    param(
        [int]$Number, [string]$Do, [string]$Why,
        [scriptblock]$Command, [switch]$Manual, [string]$Shell = "powershell"
    )
    Write-Rule "  Step $Number of 4"
    Show-Prose $Do "White"
    if ($Why) { Write-Host ""; Show-Prose $Why "DarkGray" }

    if ($Manual) {
        Write-Host ''
        Write-Host '  -> Do this yourself, then press Enter to carry on.' -ForegroundColor Yellow
        if (-not $Unattended -and -not $DryRun) { [void](Read-Host) }
        return
    }

    Write-Host ''
    foreach ($l in ($Command.ToString().Trim() -split "`n")) {
        Write-Host ("    " + $l.Trim()) -ForegroundColor Green
    }
    Write-Host ''

    if ($DryRun) { Write-Host "  (dry run -- not executed)" -ForegroundColor DarkGray; return }
    if (-not $Unattended) {
        $a = Read-Host "  Run this step? [Y]es / [S]kip / [Q]uit"
        if ($a -match "^[Qq]") { Write-Host "  Stopped at your request."; exit 0 }
        if ($a -match "^[Ss]") { Write-Host "  Skipped." -ForegroundColor DarkGray; return }
    }
    try { & $Command }
    catch {
        $script:Failed++
        Write-Host ("  Step $Number failed: " + $_.Exception.Message) -ForegroundColor Red
        Show-Prose "The rest of the fix may depend on this. Read the write-up before carrying on." "Red"
        if (-not $Unattended) {
            $c = Read-Host "  Carry on anyway? [y/N]"
            if ($c -notmatch "^[Yy]") { exit 1 }
        }
    }
}

Write-Rule
Write-Host '  Windows Search finds nothing, or the Start menu does not open' -ForegroundColor White
Write-Host '  Rebuild the search index' -ForegroundColor Cyan
Write-Host ''
Write-Host '  Risk: low   Reversible   20 minutes plus rebuild time'
Write-Host ''
Show-Prose 'No warranty. Use at your own risk - JbTecWiz accepts no liability. Read it before you run it, and have a backup.' 'DarkYellow'
Write-Rule

if (-not $Unattended -and -not $DryRun) {
    $go = Read-Host '  Ready? [y/N]'
    if ($go -notmatch "^[Yy]") { Write-Host "  Nothing was changed."; exit 0 }
}

Invoke-Step -Number 1 -Do 'Check the service and the index size.' -Command {
    Get-Service WSearch | Format-List Status,StartType
    Get-Item "$env:ProgramData\Microsoft\Search\Data\Applications\Windows\Windows.edb" -ErrorAction SilentlyContinue | Format-List Length,LastWriteTime
}

Invoke-Step -Number 2 -Do 'Stop the service and delete the index database.' -Why 'A rebuild is the only reliable repair for a damaged index. It takes a few hours on a large profile and the machine should be left on, but it does not touch any of the files being indexed.' -Command {
    Stop-Service WSearch -Force
    Remove-Item "$env:ProgramData\Microsoft\Search\Data\Applications\Windows\Windows.edb" -Force
    Start-Service WSearch
}

Invoke-Step -Number 3 -Do 'Check what is included. Indexing Options -> Modify -- if Outlook or a data folder is missing from the list, results for it will never appear.' -Command {
    cmd.exe /c 'control srchadmin.dll'
}

Invoke-Step -Number 4 -Do 'Leave it to finish. Search results are incomplete until the rebuild completes.' -Manual

Write-Rule "  Confirm it worked"
Show-Prose 'Indexing Options reports indexing complete, and searches return results.' 'White'
Write-Host ''
if (-not $DryRun) {
    cmd.exe /c 'control srchadmin.dll'
}

Write-Rule
if ($script:Failed -gt 0) {
    Write-Host ("  Finished with " + $script:Failed + " failed step(s).") -ForegroundColor Yellow
    Show-Prose 'Read the full write-up at https://jbtecwiz.com/support/win-app-store-reset' 'Yellow'
} else {
    Write-Host '  Finished.' -ForegroundColor Green
}
Write-Host ''
Show-Prose 'To undo: Nothing to roll back -- the index is derived data.' 'DarkGray'
Write-Rule