using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;

namespace Revolucent.Dasso.Program.Binding
{
    static class Binding
    {
        public static void SetBinding<S, T, P>(this S source, Expression<Func<S, P>> sourceGetterExpression, T target, Action<T, P> targetSetter)
            where S : INotifyPropertyChanged
            where T : INotifyPropertyChanged
        {
            var sourceGetter = sourceGetterExpression.Compile();
            var memberExpression = (MemberExpression)sourceGetterExpression.Body;
            var propertyName = memberExpression.Member.Name;
            source.PropertyChanged += (sender, e) =>
                {
                    if (e.PropertyName != propertyName)
                        return;
                    targetSetter(target, sourceGetter(source));
                };
        }

        public static void SetBinding<S, T, P>(this S source, Expression<Func<S, P>> sourceGetterExpression, T target, Expression<Func<T, P>> targetGetterExpression)
            where S : INotifyPropertyChanged
            where T : INotifyPropertyChanged
        {
            var memberExpression = (MemberExpression)targetGetterExpression.Body;
            var propertyInfo = (PropertyInfo)memberExpression.Member;
            Action<T, P> targetSetter = (targ, value) => propertyInfo.SetValue(targ, value, null);
            SetBinding(source, sourceGetterExpression, target, targetSetter);
        }
    }
}