// Hook: BeforeCalculation
// Halt the job if any required parameters are missing or blank.
//
// Catching misconfigured schedules early avoids producing useless reports
// downstream. Adjust the 'required' list to match the parameters your job
// depends on.

var required = new[] { "Region", "Period", "Currency" };

var missing = required
    .Where(p => !Parameters.TryGetValue(p, out var v) || string.IsNullOrWhiteSpace(v))
    .ToList();

if (missing.Count > 0)
{
    AddError($"Job '{JobName}' is missing required parameter(s): {string.Join(", ", missing)}.");
}

Logger.LogInformation($"Pre-flight parameter check passed for '{OutputName}'.");