# Build script: packages the CLI as a single self-executing .exe
#
# Usage:
#   .\build.ps1              -> dist\mitsubishi-label-converter.exe
#   .\build.ps1 -Clean       -> remove build artifacts first
#   .\build.ps1 -Onefile     -> single-file exe (slower start, one file)
#                               default is one-folder mode (fast start)
#   .\build.ps1 -Test        -> run the exe against the real assets afterwards
#
# Requirements: pyinstaller installed in the active environment
#   pip install pyinstaller

[CmdletBinding()]
param(
    [switch]$Clean,
    [switch]$Onefile,
    [switch]$Test,
    # Explicit interpreter, e.g. -Python C:\Path\To\python.exe
    [string]$Python
)

$ErrorActionPreference = "Stop"
$root = $PSScriptRoot
$exename = "mitsubishi-label-converter"
$dist = Join-Path $root "dist"

# Resolve a working Python interpreter -------------------------------
# The Microsoft Store 'python' alias can shadow a real install, so verify
# each candidate by actually running it.
function Test-Python([string]$cmd) {
    if (-not $cmd) { return $false }
    try {
        & $cmd -c "import sys; sys.exit(0)" 2>$null
        return ($LASTEXITCODE -eq 0)
    } catch {
        return $false
    }
}

if (-not $Python) {
    $candidates = @(
        (Join-Path $root ".venv\Scripts\python.exe"),   # project venv first
        "python",
        "py"
    )
    foreach ($c in $candidates) {
        if (Test-Python $c) { $Python = $c; break }
    }
}
if (-not $Python -or -not (Test-Python $Python)) {
    Write-Error @"
No working Python interpreter found.
Tried: project .venv, 'python' on PATH, 'py' launcher.
Create a venv (python -m venv .venv) or pass one explicitly:
    .\build.ps1 -Python C:\Path\To\python.exe
"@
}
Write-Host "==> Using Python: $Python"

# Sanity checks ------------------------------------------------------------
& $Python -m PyInstaller --version 2>$null | Out-Null
if ($LASTEXITCODE -ne 0) {
    Write-Error "PyInstaller not found in '$Python'. Run: $Python -m pip install pyinstaller"
}

if ($Clean) {
    Write-Host "==> Cleaning build artifacts..."
    Remove-Item -Recurse -Force -ErrorAction SilentlyContinue `
        (Join-Path $root "build"), $dist
    # remove the egg-info generated by editable installs
    Get-ChildItem $root -Filter "*.egg-info" -Directory -ErrorAction SilentlyContinue |
        Remove-Item -Recurse -Force -ErrorAction SilentlyContinue
}

# Build --------------------------------------------------------------------
$modeArgs = @()
if ($Onefile) { $modeArgs += "--onefile" } else { $modeArgs += "--onedir" }

Write-Host "==> Building $exename ($($modeArgs -join ' '))..."
& $Python -m PyInstaller @modeArgs `
    --name $exename `
    --noconfirm `
    --clean `
    --console `
    --paths "$root\src" `
    "$root\run.py"

if ($LASTEXITCODE -ne 0) {
    Write-Error "PyInstaller failed with exit code $LASTEXITCODE"
}

# Locate the exe -----------------------------------------------------------
if ($Onefile) {
    $exe = Join-Path $dist "$exename.exe"
} else {
    $exe = Join-Path $dist "$exename\$exename.exe"
}
if (-not (Test-Path $exe)) {
    Write-Error "Build finished but exe not found at $exe"
}

$size = "{0:N1} MB" -f ((Get-Item $exe).Length / 1MB)
Write-Host "==> Built: $exe ($size)"

# Optional smoke test -------------------------------------------------------
if ($Test) {
    Write-Host "==> Smoke testing against assets/Global.xml..."
    $testOut = Join-Path $dist "smoketest.xlsx"
    & $exe to-xlsx (Join-Path $root "assets\Global.xml") `
        --sdt (Join-Path $root "assets\SDT.xml") `
        -o $testOut --force
    if ($LASTEXITCODE -ne 0) {
        Write-Error "Smoke test failed"
    }
    & $exe report (Join-Path $root "assets\Global.xml") --sdt (Join-Path $root "assets\SDT.xml")
    if ($LASTEXITCODE -ne 0) {
        Write-Error "Smoke test (report) failed"
    }
    Remove-Item $testOut -Force -ErrorAction SilentlyContinue
    Write-Host "==> Smoke test OK"
}

Write-Host ""
Write-Host "Done. Distribute: $exe"
if (-not $Onefile) {
    Write-Host "Note: one-folder mode requires the whole dist\$exename folder."
}