[CmdletBinding()]
param()

Set-StrictMode -Version Latest
$ErrorActionPreference = 'Stop'

$root = $PSScriptRoot
$binPath = Join-Path $root 'bin'

function Normalize-PathEntry {
    param([string]$Value)

    if ([string]::IsNullOrWhiteSpace($Value)) {
        return ''
    }

    return $Value.Trim().TrimEnd('\')
}

function Remove-UserPath {
    param([string]$PathToRemove)

    $current = [Environment]::GetEnvironmentVariable('Path', 'User')
    $normalizedTarget = Normalize-PathEntry $PathToRemove

    $entries = @(
        $current -split ';' |
        ForEach-Object { Normalize-PathEntry $_ } |
        Where-Object {
            $_ -and -not $_.Equals($normalizedTarget, [StringComparison]::OrdinalIgnoreCase)
        }
    )

    [Environment]::SetEnvironmentVariable('Path', ($entries -join ';'), 'User')
    Write-Host "Removed from user PATH: $PathToRemove"
}

function Remove-ProfileBlock {
    param([string]$ProfilePath)

    if (-not (Test-Path -LiteralPath $ProfilePath)) {
        return
    }

    $beginMarker = '# >>> MS.Open >>>'
    $endMarker = '# <<< MS.Open <<<'
    $content = Get-Content -LiteralPath $ProfilePath -Raw
    $pattern = "(?ms)^$([regex]::Escape($beginMarker)).*?^$([regex]::Escape($endMarker))\s*"
    $cleaned = [regex]::Replace($content, $pattern, '').TrimEnd()

    if ($cleaned) {
        Set-Content -LiteralPath $ProfilePath -Value "$cleaned`r`n" -Encoding UTF8
    }
    else {
        Set-Content -LiteralPath $ProfilePath -Value '' -Encoding UTF8
    }

    Write-Host "Removed MS.Open from profile: $ProfilePath"
}

Remove-UserPath -PathToRemove $binPath

$documents = [Environment]::GetFolderPath('MyDocuments')
$profiles = @(
    (Join-Path $documents 'WindowsPowerShell\Microsoft.PowerShell_profile.ps1'),
    (Join-Path $documents 'PowerShell\Microsoft.PowerShell_profile.ps1')
) | Select-Object -Unique

foreach ($profilePath in $profiles) {
    Remove-ProfileBlock -ProfilePath $profilePath
}

Write-Host ''
Write-Host 'MS.Open has been uninstalled from PATH and PowerShell profiles.'
Write-Host 'Restart your terminal. You can then delete this folder.'