param(
    [Parameter(Mandatory = $true)][string]$ConfigPath,
    [Parameter(Mandatory = $true)][ValidateSet('Seed','SuppressSecond','Check')][string]$Mode
)
$ErrorActionPreference = 'Stop'
. (Join-Path $PSScriptRoot 'mail-common.ps1')
$context = Get-MailContext $ConfigPath
$db = Open-MailDatabase $context
try {
    if ($Mode -eq 'Seed') {
        foreach ($address in @('one@example.invalid','two@example.invalid','three@example.invalid','blocked@example.invalid')) {
            $command = $db.CreateCommand()
            $command.CommandText = "INSERT INTO [Contact] ([EmailOriginal],[EmailKey],[BusinessName],[SourceReference],[Country],[EligibilityBasis],[CreatedAtUtc]) VALUES (?,?,?,?,?,?,?)"
            foreach ($value in @($address,$address,'Example Business','https://example.invalid/listing','US','public_listing')) {
                $null = $command.Parameters.Add('text', [System.Data.OleDb.OleDbType]::VarWChar, 254)
                $command.Parameters[$command.Parameters.Count - 1].Value = $value
            }
            $null = $command.Parameters.Add('created', [System.Data.OleDb.OleDbType]::Date)
            $command.Parameters[6].Value = [DateTime]::UtcNow
            $null = $command.ExecuteNonQuery()
        }
    }
    if ($Mode -in @('Seed','SuppressSecond')) {
        $address = if ($Mode -eq 'Seed') { 'blocked@example.invalid' } else { 'two@example.invalid' }
        $command = $db.CreateCommand()
        $command.CommandText = 'INSERT INTO [Suppression] ([EmailKey],[Reason],[RecordedAtUtc]) VALUES (?,?,?)'
        $null = $command.Parameters.Add('email', [System.Data.OleDb.OleDbType]::VarWChar, 254)
        $command.Parameters[0].Value = $address
        $null = $command.Parameters.Add('reason', [System.Data.OleDb.OleDbType]::VarWChar, 40)
        $command.Parameters[1].Value = 'opt-out'
        $null = $command.Parameters.Add('recorded', [System.Data.OleDb.OleDbType]::Date)
        $command.Parameters[2].Value = [DateTime]::UtcNow
        $null = $command.ExecuteNonQuery()
    }
    if ($Mode -eq 'Check') {
        $command = $db.CreateCommand()
        $command.CommandText = "SELECT COUNT(*) FROM [Campaign] WHERE [Status]='approved_paused'"
        if ([int]$command.ExecuteScalar() -ne 1) { throw 'Expected one approved paused campaign' }
        $command.CommandText = "SELECT COUNT(*) FROM [Delivery] WHERE [Status]='pending'"
        if ([int]$command.ExecuteScalar() -ne 2) { throw 'Expected two pending deliveries' }
        $command.CommandText = 'SELECT COUNT(*) FROM [Attempt]'
        if ([int]$command.ExecuteScalar() -ne 0) { throw 'Internal test unexpectedly advanced the live attempt queue' }
    }
}
finally { $db.Dispose() }