#Requires -Version 5.1
<#
.SYNOPSIS
    Uninstall ctask from %LOCALAPPDATA%\ctask\bin on Windows.
.DESCRIPTION
    Removes ctask binary and status-line helpers from the install directory.
    Removes the install directory from user PATH only if the install script
    originally added it (tracked via .ctask-path-added marker).
    Does NOT remove workspace data, CTASK_ROOT, or any task folders.
#>
[CmdletBinding()]
param()

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

$InstallDir = Join-Path $env:LOCALAPPDATA 'ctask\bin'

Write-Host "ctask uninstall" -ForegroundColor Cyan
Write-Host "  Install dir: $InstallDir"
Write-Host ""

if (-not (Test-Path $InstallDir)) {
    Write-Host "  Nothing to uninstall. Directory does not exist." -ForegroundColor DarkGray
    exit 0
}

# Step 1: Remove installed files (only ctask-owned files)
$ctaskFiles = @(
    'ctask.exe',
    'ctask-statusline.sh',
    'ctask-statusline.ps1'
)

$removedCount = 0
foreach ($name in $ctaskFiles) {
    $path = Join-Path $InstallDir $name
    if (Test-Path $path) {
        Remove-Item $path -Force
        Write-Host "  Removed $name"
        $removedCount++
    }
}

if ($removedCount -eq 0) {
    Write-Host "  No ctask files found in install directory." -ForegroundColor DarkGray
}

# Step 2: Remove PATH entry only if ctask install added it (marker file exists)
$marker = Join-Path $InstallDir '.ctask-path-added'
if (Test-Path $marker) {
    $userPath = [Environment]::GetEnvironmentVariable('Path', 'User')
    if (-not $userPath) { $userPath = '' }
    $pathEntries = $userPath -split ';' | Where-Object { $_ -ne '' }

    if ($pathEntries -contains $InstallDir) {
        $newEntries = $pathEntries | Where-Object { $_ -ne $InstallDir }
        $newPath = $newEntries -join ';'
        [Environment]::SetEnvironmentVariable('Path', $newPath, 'User')
        Write-Host ""
        Write-Host "  PATH: removed $InstallDir" -ForegroundColor Green
        Write-Host "  NOTE: Open a new terminal for PATH changes to take effect." -ForegroundColor Yellow
    }

    Remove-Item $marker -Force
} else {
    Write-Host ""
    Write-Host "  PATH: not modified (no ownership marker found)." -ForegroundColor DarkGray
    Write-Host "  If you added $InstallDir to PATH manually, remove it manually." -ForegroundColor DarkGray
}

# Step 3: Remove install directory if empty
if ((Test-Path $InstallDir) -and ((Get-ChildItem $InstallDir | Measure-Object).Count -eq 0)) {
    Remove-Item $InstallDir -Force
    Write-Host "  Removed empty directory: $InstallDir"
    # Also remove parent ctask dir if empty
    $parentDir = Split-Path $InstallDir
    if ((Test-Path $parentDir) -and ((Get-ChildItem $parentDir | Measure-Object).Count -eq 0)) {
        Remove-Item $parentDir -Force
    }
}

# Safety reminder
Write-Host ""
Write-Host "Workspace data is untouched:" -ForegroundColor DarkGray
$root = $env:CTASK_ROOT
if (-not $root) { $root = Join-Path $env:USERPROFILE 'ai-workspaces' }
Write-Host "  $root" -ForegroundColor DarkGray
Write-Host ""
Write-Host "Done." -ForegroundColor Cyan