using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


namespace JRCookbookBusiness
{
    public enum MeasureType
    {
        Mass,
        Volume,
        Unit
    }
    public class Measure
    {
        public Guid? measureID = null;
        public String description = String.Empty;
        public MeasureType measureType = MeasureType.Mass;


        public Measure()
        {
        }

        public Measure(Guid measureID)
        {
            PopulateByID(measureID);
        }

        public static Measure GetMeasureByID(Guid measureID)
        {
            return new Measure(measureID);
        }

        private void PopulateByID(Guid measureID)
        {
            DataSet recordSet;

            recordSet = clsDatabaseLayer.GetDatabaseLayer().GetMeasureByID(measureID);

            if (recordSet.Tables[0].Rows.Count > 0)
            {
                DataRow ldbrwRow;
                ldbrwRow = recordSet.Tables[0].Rows[0];

                PopulateFromDataRow(ldbrwRow);
            }

        }

        private void PopulateFromDataRow(DataRow dataRow)
        {
            InitializeAllFields();

            if (dataRow.IsNull("measureID"))
                measureID = null;
            else
                measureID = (Guid)dataRow["measureID"];

            if (dataRow.IsNull("description"))
                description = String.Empty;
            else
                description = (String)dataRow["description"];

            if (dataRow.IsNull("Type"))
                measureType = MeasureType.Mass;
            else
                measureType = MeasureTypeByString((String)dataRow["Type"]);

        }

        private void InitializeAllFields()
        {
            measureID = null;
            description = String.Empty;
            measureType = MeasureType.Mass;
        }

        public static Measure GetMeasureByDataRow(DataRow dataRow)
        {
            var newMeasure = new Measure();
            newMeasure.PopulateFromDataRow(dataRow);

            return newMeasure;
        }

        public static List<Measure> GetMeasuresByIngredientID(Guid ingredientID)
        {
            var returnValue = new List<Measure>();

            DataSet recordSet;

            recordSet = clsDatabaseLayer.GetDatabaseLayer().GetMeasuresByIngredientID(ingredientID);

            foreach (DataRow dataRow in recordSet.Tables[0].Rows)
            {
                var newMeasure = Measure.GetMeasureByDataRow(dataRow);
                returnValue.Add(newMeasure);
            }

            return returnValue;
        }


        public static MeasureType MeasureTypeByString(String value)
        {
            switch (value)
            {
                case "Mass": return MeasureType.Mass;
                case "Volume": return MeasureType.Volume;
                case "Unit": return MeasureType.Unit;
                default:
                    throw new ApplicationException("Invalid MeasureType");
            }
        }

        public static String ConvertMeasureTypeToString(MeasureType value)
        {
            switch (value)
            {
                case MeasureType.Mass: return "Mass";
                case MeasureType.Volume: return "Volume";
                case MeasureType.Unit: return "Unit";
                default:
                    throw new ApplicationException("Invalid MeasureType");
            }
        }

        public override string ToString()
        {
            return this.description;
        }

    }
}