using Core.Entities;
using Core.Validation.Rules.BaseRules;

namespace Core.Validation.Rules.StudentAssignmentRules;

/// <summary>
/// Validation rule that checks if a student has too few event assignments
/// </summary>
public class TooFewEventsRule : EventCountThresholdRuleBase
{
    protected override int GetCount(StudentEventStatistics statistics) => statistics.EventCount;

    protected override int GetThreshold(ValidationConfiguration config) => config.MinRecommendedEvents;

    protected override bool ViolatesThreshold(int count, int threshold) => count < threshold;

    protected override ValidationSeverity GetBaseSeverity(ValidationConfiguration config) => config.EventCountSeverity;

    protected override int? GetCriticalThreshold(ValidationConfiguration config) => config.MinCriticalEvents;

    protected override bool ViolatesCriticalThreshold(int count, int criticalThreshold) => count < criticalThreshold;

    protected override string Code => "TOO_FEW_EVENTS";

    protected override string GetMessage(int count, int threshold) =>
        $"Student has {count} events (min recommended: {threshold})";

    protected override Dictionary<string, object> BuildAdditionalMetadata(StudentEventStatistics statistics, ValidationConfiguration config)
    {
        return new Dictionary<string, object>
        {
            { "MinRecommended", config.MinRecommendedEvents },
            { "MinCritical", config.MinCriticalEvents }
        };
    }
}