using System;
using System.Collections.Generic;
using System.Linq.Expressions;

namespace Szmedi.Toolkit.Assists;

public abstract class BaseTypeConfiguration<T>
{
    protected IList<PropertyConfiguration> Mappings { get; set; } = new List<PropertyConfiguration>();

    public PropertyConfiguration Map<TProperty>(Expression<Func<T, TProperty>> expression)
    {
        var memberExpression = GetMemberExpression(expression);

        var map = new PropertyConfiguration
        {
            Member = memberExpression.Member
        };

        Mappings.Add(map);

        return map;
    }

    public IList<PropertyConfiguration> GetMappings()
    {
        return Mappings;
    }

    protected internal MemberExpression GetMemberExpression<TProperty>(Expression<Func<T, TProperty>> expression)
    {
        return expression.Body as MemberExpression ?? throw new ArgumentException("Expression Invalid.", nameof(expression));
    }
}