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

namespace COA.EnterpriseServices.DataAccess.QuickBase
{
    public class QuickBaseDataAccess<T> : IDataAccess<T> where T : class, IRecord, new()
    {
        public bool Add(T item)
        {
            var fieldData = GetFieldData(item);

            // use fieldData to create mapped data to push to quickbase API

            return true;
        }

        public bool Update(T item)
        {
            return true;
        }

        public T Get(int id)
        {
            // we'll never get data from QB
            return null;
        }

        public ICollection<T> Get(Expression<Func<T, bool>> query)
        {
            // we'll never get data from QB
            return null;
        }

        private IEnumerable<KeyValuePair<int, object>> GetFieldData(T item)
        {
            var properties = item.GetType().GetProperties();

            foreach (var property in properties)
            {
                var fieldId = FieldMapRegistry.GetFieldId(property);
                var value = property.GetValue(item);

                if (fieldId != null)
                {
                    yield return new KeyValuePair<int, object>(fieldId.Value, value);
                }
            }
        }
    }
}