namespace Fengling.Activity.Domain.ValueObjects;

public class ConditionConfig : IEquatable<ConditionConfig>
{
    public string StrategyType { get; }
    public IReadOnlyDictionary<string, object> Parameters { get; }

    private ConditionConfig(string strategyType, Dictionary<string, object> parameters)
    {
        StrategyType = strategyType;
        Parameters = parameters;
    }

    public static ConditionConfig Create(string strategyType, Dictionary<string, object> parameters)
    {
        if (string.IsNullOrWhiteSpace(strategyType))
            throw new ArgumentException("Strategy type cannot be empty");
        return new ConditionConfig(strategyType, parameters);
    }

    public T? GetParameter<T>(string key)
    {
        if (Parameters.TryGetValue(key, out var value) && value is T typedValue)
            return typedValue;
        return default;
    }

    public bool Equals(ConditionConfig? other)
    {
        if (other is null) return false;
        if (StrategyType != other.StrategyType) return false;
        return Parameters.Count == other.Parameters.Count &&
               Parameters.All(p => other.Parameters.TryGetValue(p.Key, out var ov) &&
                                   (p.Value?.Equals(ov) ?? ov is null));
    }

    public override bool Equals(object? obj) => Equals(obj as ConditionConfig);
    public override int GetHashCode() => HashCode.Combine(StrategyType, Parameters);
    public static bool operator ==(ConditionConfig a, ConditionConfig b) => a.Equals(b);
    public static bool operator !=(ConditionConfig a, ConditionConfig b) => !a.Equals(b);
}