using StellaOps.DependencyInjection.Validation;

namespace StellaOps.Plugin.MyJob;

/// <summary>
/// Validates <see cref="MyJobOptions"/> configuration.
/// </summary>
public sealed class MyJobOptionsValidator : OptionsValidatorBase<MyJobOptions>
{
    protected override string SectionPrefix => MyJobOptions.SectionName;

    protected override void ValidateOptions(MyJobOptions options, ValidationContext context)
    {
        context
            .RequireNotEmpty(options.CronSchedule, nameof(options.CronSchedule))
            .RequirePositive(options.MaxExecutionMinutes, nameof(options.MaxExecutionMinutes))
            .RequirePositive(options.BatchSize, nameof(options.BatchSize))
            .RequireInRange(options.MaxExecutionMinutes, nameof(options.MaxExecutionMinutes), 1, 1440)
            .RequireInRange(options.BatchSize, nameof(options.BatchSize), 1, 10000);

        // Validate cron expression format (basic check)
        if (!string.IsNullOrWhiteSpace(options.CronSchedule))
        {
            var parts = options.CronSchedule.Split(' ', StringSplitOptions.RemoveEmptyEntries);
            if (parts.Length < 5 || parts.Length > 6)
            {
                context.AddError(nameof(options.CronSchedule), "must be a valid cron expression with 5 or 6 fields.");
            }
        }
    }
}