using Core.Entities;

namespace Core.Validation.Rules.TeamRules;

/// <summary>
/// Validation rule that checks if a team-based event has an assigned captain
/// </summary>
public class MissingCaptainRule : IValidationRule<Team>
{
    public ValidationWarning? Validate(Team entity, ValidationConfiguration config)
    {
        if (!config.RequireTeamCaptain)
            return null;

        // Individual events don't need captains
        if (entity.Event.EventFormat == EventFormat.Individual)
            return null;

        if (entity.Captain != null)
            return null;

        return new ValidationWarning
        {
            Code = "MISSING_CAPTAIN",
            Message = "Team has no captain assigned",
            Severity = config.MissingCaptainSeverity,
            Context = ValidationContext.Team,
            IconIdentifier = "Captain",
            Metadata = new Dictionary<string, object>
            {
                { "TeamId", entity.Id },
                { "EventName", entity.Event.Name },
                { "TeamSize", entity.Students.Count }
            }
        };
    }

    public bool AppliesTo(ValidationContext context) =>
        context == ValidationContext.Team;
}