# dovmem installer for Windows - https://dovmem.com
# Usage (PowerShell):  irm https://dovmem.com/install.ps1 | iex
$ErrorActionPreference = 'Stop'
$ProgressPreference = 'SilentlyContinue'

$WheelUrl  = 'https://dovmem.com/dl/dovmem-0.3.1-py3-none-any.whl'
$WheelSha  = '380319659c134a4e8965725bcf7a5576ea629ec60914e66df019f4065a2dbd76'
$WheelName = 'dovmem-0.3.1-py3-none-any.whl'
$Root = Join-Path $env:USERPROFILE '.devmem'
$App  = Join-Path $Root 'app'
$Bin  = Join-Path $Root 'bin'

function Say($m)  { Write-Host $m }
function Fail($m) { Write-Host "x $m" -ForegroundColor Red; throw "dovmem install failed: $m" }

function Test-Py($exe, $pre) {
  try {
    $out = & $exe @pre -c "import sys; print(1 if sys.version_info >= (3, 9) else 0)" 2>$null
    return ($LASTEXITCODE -eq 0 -and "$out".Trim() -eq '1')
  } catch { return $false }
}

function Find-Python {
  if ((Get-Command py -ErrorAction SilentlyContinue) -and (Test-Py 'py' @('-3'))) { return ,@('py', @('-3')) }
  foreach ($n in @('python', 'python3')) {
    $c = Get-Command $n -ErrorAction SilentlyContinue
    # Skip the Microsoft Store alias (WindowsApps stub) - it only opens the Store.
    if ($c -and $c.Source -notlike '*\WindowsApps\*' -and (Test-Py $c.Source @())) { return ,@($c.Source, @()) }
  }
  foreach ($v in @('313', '312', '311', '310', '39')) {
    $p = Join-Path $env:LOCALAPPDATA "Programs\Python\Python$v\python.exe"
    if ((Test-Path $p) -and (Test-Py $p @())) { return ,@($p, @()) }
  }
  return $null
}

$py = Find-Python
if (-not $py) {
  if (-not (Get-Command winget -ErrorAction SilentlyContinue)) {
    Fail 'dovmem needs Python 3.9+. Install it from https://www.python.org/downloads/ (tick "Add python.exe to PATH"), then run this again.'
  }
  Say '-> Installing Python 3.12 for your user (one time, via winget)...'
  winget install -e --id Python.Python.3.12 --scope user --silent --accept-package-agreements --accept-source-agreements | Out-Null
  $env:Path = [Environment]::GetEnvironmentVariable('Path', 'User') + ';' + [Environment]::GetEnvironmentVariable('Path', 'Machine')
  $py = Find-Python
  if (-not $py) { Fail 'Python was installed but not found yet. Open a new PowerShell window and run the command again.' }
}
$PyExe = $py[0]; $PyPre = $py[1]

$Tmp = Join-Path ([IO.Path]::GetTempPath()) ('dovmem-' + [guid]::NewGuid().ToString('N'))
New-Item -ItemType Directory -Path $Tmp | Out-Null
try {
  Say '-> Downloading dovmem...'
  $Whl = Join-Path $Tmp $WheelName
  Invoke-WebRequest -UseBasicParsing -Uri $WheelUrl -OutFile $Whl
  $got = (Get-FileHash -Algorithm SHA256 -Path $Whl).Hash.ToLower()
  if ($got -ne $WheelSha) { Fail 'Checksum mismatch. The download may be corrupted; please try again.' }

  Say "-> Installing into $App"
  & $PyExe @PyPre -m venv $App
  if ($LASTEXITCODE -ne 0) { Fail 'Could not create a Python environment.' }
  $VPy = Join-Path $App 'Scripts\python.exe'
  & $VPy -m pip install --quiet --disable-pip-version-check --no-deps --upgrade $Whl
  if ($LASTEXITCODE -ne 0) { Fail 'pip could not install dovmem.' }
} finally {
  Remove-Item -Recurse -Force $Tmp -ErrorAction SilentlyContinue
}

# The devmem / dovmem commands for new terminals
New-Item -ItemType Directory -Force -Path $Bin | Out-Null
foreach ($n in @('devmem', 'dovmem')) {
  Set-Content -Path (Join-Path $Bin "$n.cmd") -Encoding ASCII -Value "@`"$App\Scripts\$n.exe`" %*"
}
$userPath = [Environment]::GetEnvironmentVariable('Path', 'User')
if (-not (($userPath -split ';') -contains $Bin)) {
  [Environment]::SetEnvironmentVariable('Path', (($userPath.TrimEnd(';') + ';' + $Bin).TrimStart(';')), 'User')
}
$env:Path = $env:Path + ';' + $Bin

# Desktop + Start menu icon: opens the dashboard without a console window
$PyW = Join-Path $App 'Scripts\pythonw.exe'
$Shell = New-Object -ComObject WScript.Shell
foreach ($dir in @([Environment]::GetFolderPath('Desktop'), [Environment]::GetFolderPath('Programs'))) {
  if ($dir -and (Test-Path $dir)) {
    $lnk = $Shell.CreateShortcut((Join-Path $dir 'dovmem.lnk'))
    $lnk.TargetPath = $PyW
    $lnk.Arguments = '-m devmem ui'
    $lnk.WorkingDirectory = $env:USERPROFILE
    $lnk.Description = 'dovmem - your AI chats, kept forever'
    $lnk.Save()
  }
}
Say '+ dovmem installed. A "dovmem" icon is on your desktop.'
Say ''
$lang = if ((Get-UICulture).Name -like 'ar*') { 'ar' } else { 'en' }
& (Join-Path $App 'Scripts\devmem.exe') setup --no-shortcut --lang $lang