using Connected.Entities.Annotations;
using System.Reflection;

namespace Connected.Expressions.Mappings;

internal sealed class MemberMapping
{
    public MemberMapping(PropertyInfo property)
    {
        Property = property;

        Initialize();
    }

    private PropertyInfo Property { get; }

    public MemberInfo MemberInfo => Property;
    public bool IsValid { get; private set; }
    public bool IsPrimaryKey { get; private set; }
    public bool IsReadOnly { get; private set; }
    public string Name { get; private set; }

    public Type Type => Property.PropertyType;
    private void Initialize()
    {
        var persistence = Property.GetCustomAttribute<PersistenceAttribute>();

        if (persistence is null || persistence.Persistence.HasFlag(ColumnPersistence.Read))
            IsValid = true;

        IsReadOnly = persistence is not null && persistence.Persistence.HasFlag(ColumnPersistence.Read);
        IsPrimaryKey = Property.GetCustomAttribute<PrimaryKeyAttribute>() is not null;

        var memberAttribute = Property.GetCustomAttribute<MemberAttribute>();

        if (memberAttribute is not null && !string.IsNullOrWhiteSpace(memberAttribute.Member))
            Name = memberAttribute.Member;
        else
            Name = MemberInfo.Name.ToCamelCase();
    }
}