[CmdletBinding()]
param(
  [switch]$NoClean
)

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

$scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
$repoRoot = Resolve-Path (Join-Path $scriptDir '..')
Set-Location $repoRoot

function Get-VersionString {
  $versionFile = Join-Path $repoRoot 'VERSION'
  if (!(Test-Path $versionFile)) { return 'unknown' }
  return (Get-Content $versionFile -Raw).Trim()
}

function Sanitize-FilePart([string]$text) {
  if ([string]::IsNullOrWhiteSpace($text)) { return 'unknown' }
  $s = $text.Trim()
  foreach ($ch in @('\','/','?',':','*','"','<','>','|')) {
    $s = $s.Replace($ch, '_')
  }
  $s = $s -replace '\s+', '_'
  return $s
}

function Get-PlatformToken {
  return "windows"
}

function Get-ArchToken {
  switch ([System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture.ToString().ToLowerInvariant()) {
    "x64" { return "amd64" }
    "arm64" { return "arm64" }
    default { return ([System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture.ToString().ToLowerInvariant()) }
  }
}

$python = Join-Path $repoRoot '.venv\Scripts\python.exe'
if (!(Test-Path $python)) {
  Write-Host "No .venv found. Creating venv..." -ForegroundColor Yellow
  python -m venv .venv
  if (!(Test-Path $python)) {
    throw "Failed to create venv; expected at $python"
  }
}

Write-Host "Using Python: $python" -ForegroundColor Cyan

& $python -m pip install -r requirements.txt
& $python -m pip install pyinstaller pillow

$pngIcon = Join-Path $repoRoot 'src\ccma\assets\icons\ccma.png'
$icoOut  = Join-Path $repoRoot 'build\app.ico'
if (Test-Path $pngIcon) {
  Write-Host "Generating ICO: $icoOut" -ForegroundColor Cyan
  & $python -c @"
from pathlib import Path
from PIL import Image
png = Path(r'$pngIcon')
ico = Path(r'$icoOut')
ico.parent.mkdir(parents=True, exist_ok=True)
img = Image.open(png).convert('RGBA')
img.save(ico, format='ICO', sizes=[(16,16),(24,24),(32,32),(48,48),(64,64),(128,128),(256,256)])
print(str(ico))
"@
} else {
  Write-Host "PNG icon not found at: $pngIcon (building without icon)" -ForegroundColor Yellow
}

if (-not $NoClean) {
  if (Test-Path (Join-Path $repoRoot 'dist')) { Remove-Item -Recurse -Force (Join-Path $repoRoot 'dist') }
  if (Test-Path (Join-Path $repoRoot 'build\pyinstaller')) { Remove-Item -Recurse -Force (Join-Path $repoRoot 'build\pyinstaller') }
}

Write-Host "Building with PyInstaller spec..." -ForegroundColor Cyan
& $python -m PyInstaller --noconfirm --clean --distpath dist --workpath build\pyinstaller build\ccma.spec

$exe = Join-Path $repoRoot 'dist\ccma.exe'
if (!(Test-Path $exe)) {
  throw "Build finished but exe not found at: $exe"
}

$version = Get-VersionString
$versionSafe = Sanitize-FilePart $version
$platformToken = Get-PlatformToken
$archToken = Get-ArchToken
$versionedExe = Join-Path $repoRoot ("dist\ccma-$versionSafe-$platformToken-$archToken.exe")

Copy-Item -Force $exe $versionedExe

Write-Host ""
Write-Host "Build OK" -ForegroundColor Green
Write-Host "Base EXE:      $exe" -ForegroundColor Green
Write-Host "Versioned EXE: $versionedExe" -ForegroundColor Green
Write-Host "Version:       $version" -ForegroundColor Green