# build.ps1
# ---------
# Builds LottoSight into a standalone Windows executable.
# Output: dist\LottoSight\LottoSight.exe
#
# Usage:
#   .\build.ps1               # install deps + build
#   .\build.ps1 -SkipDeps     # skip pip install (faster when deps are current)
#   .\build.ps1 -Clean        # wipe dist\ and build\ before building

param(
    [switch]$Clean,
    [switch]$SkipDeps
)

$ErrorActionPreference = "Stop"
Set-Location $PSScriptRoot

# --- Helpers ------------------------------------------------------------------

function Write-Step {
    param([string]$Msg)
    Write-Host ""
    Write-Host ("  " + $Msg) -ForegroundColor Cyan
    Write-Host ("  " + ("-" * $Msg.Length)) -ForegroundColor DarkGray
}

function Fail {
    param([string]$Msg)
    Write-Host ""
    Write-Host "  ERROR: $Msg" -ForegroundColor Red
    Write-Host ""
    exit 1
}

# --- Python check -------------------------------------------------------------
Write-Step "Checking Python"

$pyCmd = Get-Command python -ErrorAction SilentlyContinue
if (-not $pyCmd) {
    Fail "Python not found. Install Python 3.12+ and add it to PATH."
}

# Use exit code to verify version - avoids string parsing
python -c "import sys; sys.exit(0 if sys.version_info >= (3,12) else 1)" 2>$null
if ($LASTEXITCODE -ne 0) {
    $found = python -c "import sys; print(sys.version)"
    Fail "Python 3.12 or higher required. Found: $found"
}

$pyVersion = python -c "import sys; print(sys.version.split()[0])"
Write-Host "  Python $pyVersion  OK" -ForegroundColor Green

# --- Dependencies -------------------------------------------------------------
if (-not $SkipDeps) {
    Write-Step "Installing dependencies"

    python -m pip install --upgrade pip --quiet
    if ($LASTEXITCODE -ne 0) { Fail "pip upgrade failed." }

    python -m pip install -r requirements.txt pyinstaller --quiet
    if ($LASTEXITCODE -ne 0) { Fail "pip install failed." }

    Write-Host "  All packages up to date  OK" -ForegroundColor Green
} else {
    Write-Host ""
    Write-Host "  -SkipDeps: skipping pip install" -ForegroundColor DarkGray
}

# --- Assets -------------------------------------------------------------------
Write-Step "Checking assets"

if (-not (Test-Path "assets\icon.png")) {
    Write-Host "  icon.png missing - generating..." -ForegroundColor Yellow
    New-Item -ItemType Directory -Force "assets" | Out-Null
    python -c "from core.exporter import create_icon_png; create_icon_png('assets/icon.png')"
    if ($LASTEXITCODE -ne 0) { Fail "Could not generate icon.png." }
    Write-Host "  icon.png created  OK" -ForegroundColor Green
} else {
    Write-Host "  assets\icon.png  OK" -ForegroundColor Green
}

# --- Clean --------------------------------------------------------------------
if ($Clean) {
    Write-Step "Cleaning previous build"
    Remove-Item -Recurse -Force "dist", "build" -ErrorAction SilentlyContinue
    Write-Host "  dist\ and build\ removed  OK" -ForegroundColor Green
}

# --- Build --------------------------------------------------------------------
Write-Step "Running PyInstaller"

python -m PyInstaller lottosight.spec --clean --noconfirm
if ($LASTEXITCODE -ne 0) { Fail "PyInstaller build failed." }

# --- Verify and report --------------------------------------------------------
Write-Step "Build result"

$exePath = "dist\LottoSight\LottoSight.exe"
$distDir = "dist\LottoSight"

if (-not (Test-Path $exePath)) {
    Fail "Expected exe not found at: $exePath"
}

$exeSizeMB = [math]::Round((Get-Item $exePath).Length / 1MB, 1)
$allFiles  = Get-ChildItem $distDir -Recurse
$dirSizeMB = [math]::Round(($allFiles | Measure-Object -Property Length -Sum).Sum / 1MB, 0)
$absDir    = (Resolve-Path $distDir).Path

Write-Host ""
Write-Host "  Build successful!" -ForegroundColor Green
Write-Host ""
Write-Host "  Executable : $exePath  ($exeSizeMB MB)"
Write-Host "  Folder     : $absDir"
Write-Host "  Total size : ~$dirSizeMB MB"
Write-Host ""
Write-Host "  To run the app:" -ForegroundColor Yellow
Write-Host "    .\dist\LottoSight\LottoSight.exe" -ForegroundColor Yellow
Write-Host ""