using System;
using System.Collections.Generic;
using Deltares.Dam.Data.Sensors.Specifications;
using Deltares.Geotechnics;

namespace Deltares.Dam.Data.Sensors
{
    internal class SensorPLLine4Creator : SensorPLLine3Or4CreatorBase
    {
        public SensorPLLine4Creator(SensorLocation sensorLocation, IDictionary<Sensor, double> sensorValues) 
            : base(sensorLocation, sensorValues, PLLineType.PL4)
        {
        }

        /// <summary>
        /// Gets the start z level of the PL line
        /// </summary>
        /// <remarks>
        /// The start level is based on the PL4 configuration (locationdata or sensor) 
        /// and the position of the first sensor
        /// </remarks>
        /// <returns></returns>
        protected override double GetStartLevel()
        {
            var locationAsDataSource = new UseLocationAsDataSource();
            bool useLocationAsDataSource = locationAsDataSource.IsSatisfiedBy(SensorLocation.SourceTypePl4);
            if (useLocationAsDataSource)
            {
                if (!SensorLocation.HeadPl4.HasValue)
                    throw new PLLinesCreatorException("PL4 head has no value defined on this location");

                return SensorLocation.HeadPl4.Value;
            }

            double level;

            try
            {
                level = WaterLevelAtRiver;
            }
            catch (Exception e)
            {
                throw new PLLinesCreatorException("There was an error trying to read the water level", e);
            }

            return level;
        }

    }
}