using System.CommandLine;

public static class ValidateCommand
{
    public static Command Create()
    {
        var fileArg = new Argument<FileInfo>("scenario-file", "Path to the scenario JSON file");
        var command = new Command("validate", "Validate a scenario file without replaying")
        {
            fileArg
        };

        command.SetHandler((FileInfo file) =>
        {
            var scenario = ScenarioLoader.Load(file.FullName);
            var errors = ScenarioValidator.Validate(scenario);

            if (errors.Count == 0)
            {
                SimulatorConsole.Success($"✓ {file.Name} is valid");
                SimulatorConsole.Info($"  {scenario.Events.Count} events over " +
                    $"{scenario.Events.Last().OffsetMinutes} minutes");
                SimulatorConsole.Info($"  Patient: {scenario.Patient.FirstName} " +
                    $"{scenario.Patient.LastName}");
                SimulatorConsole.Info($"  Tags: {string.Join(", ", scenario.Scenario.Tags ?? new())}");
            }
            else
            {
                SimulatorConsole.Error($"✗ {file.Name} has {errors.Count} error(s):");
                foreach (var err in errors)
                    SimulatorConsole.Error($"  • {err}");
            }
        }, fileArg);

        return command;
    }
}