param(
    [string]$Server = ".\SQLEXPRESS",
    [string]$Database = "CustomerAIDemo2022",
    [Parameter(Mandatory = $true)]
    [string]$CsvPath,
    [switch]$SqlAuth,
    [string]$User,
    [string]$Password
)

$ErrorActionPreference = "Stop"

$resolvedCsv = (Resolve-Path -LiteralPath $CsvPath).Path
if (-not (Test-Path -LiteralPath $resolvedCsv)) {
    throw "CSV not found: $resolvedCsv"
}

$repoRoot = Split-Path -Parent $PSScriptRoot
$inputFile = Join-Path $repoRoot "sql\compat_2022_csv_seed.sql"

# sqlcmd's -v parser strips the drive letter from paths with colons (e.g. D:\...),
# so substitute the variables in PowerShell and pipe the rendered SQL via stdin.
$sql = Get-Content -LiteralPath $inputFile -Raw -Encoding UTF8
$sql = $sql -replace '\$\(DemoDatabase\)', $Database
$sql = $sql -replace '\$\(CsvPath\)', $resolvedCsv

$tempFile = [System.IO.Path]::GetTempFileName()
$tempFile = [System.IO.Path]::ChangeExtension($tempFile, '.sql')
[System.IO.File]::WriteAllText($tempFile, $sql, [System.Text.UTF8Encoding]::new($false))

$sqlcmdArgs = @(
    "-S", $Server,
    "-b",
    "-f", "i:65001,o:65001",
    "-i", $tempFile
)

if ($SqlAuth) {
    $sqlcmdArgs += @("-U", $User, "-P", $Password)
} else {
    $sqlcmdArgs += "-E"
}

Write-Host "Importing $resolvedCsv into $Server / $Database (fallback 2022 schema)..."
try {
    & sqlcmd @sqlcmdArgs
} finally {
    Remove-Item -LiteralPath $tempFile -Force -ErrorAction SilentlyContinue
}

if ($LASTEXITCODE -ne 0) {
    throw "sqlcmd failed for $inputFile with exit code $LASTEXITCODE."
}

Write-Host ""
Write-Host "CSV import complete."
Write-Host "Next: .\scripts\build_real_embeddings_ollama.ps1 -Server '$Server' -Database '$Database' -Model 'bge-m3'"