using System;
using System.Reflection;
using OpenHarbor.CQRS.Abstractions.Attributes;

namespace OpenHarbor.CQRS.Abstractions.Discovery;

public class QueryMeta : IQueryMeta
{
    public QueryMeta(Type queryType, Type serviceType, Type queryResultType)
    {
        QueryType = queryType;
        ServiceType = serviceType;
        QueryResultType = queryResultType;
    }

    protected virtual QueryNameAttribute NameAttribute => QueryType.GetCustomAttribute<QueryNameAttribute>();

    public virtual string Name
    {
        get
        {
            var name = NameAttribute?.Name ?? QueryType.Name.Replace("Query", string.Empty);
            return name;
        }
    }

    public virtual Type QueryType { get; }
    public virtual Type ServiceType { get; }
    public virtual Type QueryResultType { get; }
    public virtual string Category => "BasicQuery";

    public string LowerCamelCaseName
    {
        get
        {
            if (string.IsNullOrEmpty(Name))
                return Name;

            var name = Name;
            var firstLetter = char.ToLowerInvariant(name[0]);
            var ret = $"{firstLetter}{name[1..]}";
            return ret;
        }
    }
}