using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using Deltares.Standard.EventPublisher;

namespace Deltares.Dam.Data.Sensors
{
    /// <summary>
    /// Class to hold the collected sensor data
    /// </summary>
    public class SensorData : IDisposable
    {
        private List<Sensor> sensors = new List<Sensor>();
        private List<Group> sensorGroups = new List<Group>();
        private List<SensorLocation> sensorLocations = new List<SensorLocation>();

        public SensorData()
        {
            DataEventPublisher.OnAfterChange += DataEventPublisher_OnAfterChange;
            DataEventPublisher.OnDataListModified += DataEventPublisher_OnDataListModified;
        }

        private void DataEventPublisher_OnDataListModified(object sender, PublishEventArgs e)
        {
            if (sender is List<Sensor>)
            {
                var dma = (DataListModifiedArgs)e;
                if (dma.Action == ListModifyAction.Delete)
                {
                    UpdatePickSensorsForGroups();
                    foreach (var sensorGroup in sensorGroups)
                    {
                        sensorGroup.Remove((Sensor)e.Objects[0]);
                        // Next lines just to force an update of the group table content 
                        var ms = sensorGroup.SelectionAsString;
                        sensorGroup.SelectionAsString = ms;
                    }
                }
            }
            if (sender is List<Group>)
            {
                var dma = (DataListModifiedArgs)e;
                if (dma.Action == ListModifyAction.Delete)
                {
                    var delList = new List<SensorLocation>();
                    foreach (var sensorLocation in sensorLocations)
                    {
                        if (sensorLocation.Group == (Group) e.Objects[0])
                        {
                            delList.Add(sensorLocation);
                        }                                                
                    }
                    foreach (var delLocation in delList)
                    {
                        sensorLocations.Remove(delLocation);
                    }
                    DataEventPublisher.DataListModified(sensorLocations,null);
                }
            }
        }

        private void DataEventPublisher_OnAfterChange(object sender, PublishEventArgs e)
        {
            if (sender is Sensor || sender is Group)
            {
                UpdatePickSensorsForGroups();
            }
        }

        /// <summary>
        /// Updates the pick sensors for groups.
        /// </summary>
        public void UpdatePickSensorsForGroups()
        {
            foreach (var sensorGroup in sensorGroups)
            {
                sensorGroup.PickSensors = sensors;
            }
        }

        /// <summary>
        /// Gets or sets the sensors.
        /// </summary>
        /// <value>
        /// The sensors.
        /// </value>        
        public List<Sensor> Sensors
        {
            get { return sensors; }
            set { sensors = value; }
        }

        /// <summary>
        /// Gets or sets the sensor groups.
        /// </summary>
        /// <value>
        /// The sensor groups.
        /// </value>        
        public List<Group> SensorGroups
        {
            get { return sensorGroups; }
            set { sensorGroups = value; }
        }

        /// <summary>
        /// Gets or sets the sensor locations.
        /// </summary>
        /// <value>
        /// The sensor locations.
        /// </value>  
        [Browsable(false)]
        [ReadOnly(true)]      
        public List<SensorLocation> SensorLocations
        {
            get { return sensorLocations; }
        }

        public Sensor GetSensorById(int id)
        {
            return sensors.FirstOrDefault(sensor => sensor.ID == id);
        }

        public Group GetGroupById(int id)
        {
            return sensorGroups.FirstOrDefault(sensorGroup => sensorGroup.ID == id);
        }

        public SensorLocation GetSensorLocationByLocationName(string name)
        {
            return sensorLocations.FirstOrDefault(sensorLocation => sensorLocation.LocationName == name);
        }

        /// <summary>
        /// Gets the groups for use in selection lists in de UI.
        /// </summary>
        /// <param name="sensorLocation">The sensoLocation.</param>
        /// <returns></returns>
        public IEnumerable<Group> GetGroups(SensorLocation sensorLocation)
        {
            var list = new List<Group>();
            list.AddRange(sensorGroups);
            return list;
        }

        public void Dispose()
        {
            DataEventPublisher.OnAfterChange -= DataEventPublisher_OnAfterChange;
        }
    }
}