param(
    [string]$MsysRoot = 'C:\msys64',
    [string]$InnoSetupCompiler = ''
)

$ErrorActionPreference = 'Stop'
$repo = Split-Path -Parent $MyInvocation.MyCommand.Path
$iss = Join-Path $repo 'dat-thang.iss'

if (!$InnoSetupCompiler) {
    $candidate = Get-Command ISCC.exe -ErrorAction SilentlyContinue
    if ($candidate) { $InnoSetupCompiler = $candidate.Source }
    else {
        foreach ($path in @(
            'C:\Program Files (x86)\Inno Setup 6\ISCC.exe',
            'C:\Program Files\Inno Setup 6\ISCC.exe'
        )) {
            if (Test-Path -LiteralPath $path) { $InnoSetupCompiler = $path; break }
        }
    }
}
if (!$InnoSetupCompiler -or !(Test-Path -LiteralPath $InnoSetupCompiler)) {
    throw 'Inno Setup 6 is required to create the installer. Install Inno Setup 6, then rerun .\build-windows-installer.ps1.'
}

Push-Location $repo
try {
    & (Join-Path $repo 'build-windows.ps1') -MsysRoot $MsysRoot
    if ($LASTEXITCODE -ne 0) { throw "Windows app build failed with exit code $LASTEXITCODE" }
    $version = (Get-Content -LiteralPath (Join-Path $repo 'VERSION') -Raw).Trim()
    & $InnoSetupCompiler "/DAppVersion=$version" $iss
    if ($LASTEXITCODE -ne 0) { throw "Inno Setup failed with exit code $LASTEXITCODE" }
}
finally {
    Pop-Location
}
Write-Host "Windows installer and portable ZIP are in $(Join-Path $repo 'dist\installers')"