using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;

namespace DatabaseExport
{
    public class TestGraph //: BindableBase
    {
        private const string SEPARATOR = "§";
        private const string CURRENT_SUFFIX = "_CU";
        public string GetThresholdsSQL()
        {
            var sb = new StringBuilder();
            sb.Append("{");

            int count = 0;
            foreach (var t in Thresholds)
            {
                if (count > 0) { sb.Append(SEPARATOR); }
                //for now thresholds are only doubles, we'll probably want more complicated ones in the future
                sb.Append("(");
                sb.Append(t.ToString(CultureInfo.InvariantCulture));
                sb.Append(")");
                count++;
            }
            sb.Append("}");
            return sb.ToString();
        }
        public void SetThresholdsFromSQL(string sThresholds)
        {
            //for now we take an easy parse
            sThresholds = sThresholds.Replace("{", "").Replace("}", "");
            var sTokens = sThresholds.Split(new[] { SEPARATOR }, StringSplitOptions.None);
            foreach (var token in sTokens)
            {
                double d;
                if (double.TryParse(token, out d))
                {
                    _thresholds.Add(d);
                }
            }
        }
        public void SetChannelsFromSQL(string sChannels)
        {
            var lookup = new Dictionary<string, TestObjectChannel>();
            if (null == AvailableChannels)
            {
                return;
            }
            foreach (var channel in AvailableChannels)
            {
                lookup[channel.GetGraphID()] = channel;
            }
            sChannels = sChannels.Replace("{", "").Replace("}", "");
            var tokens = sChannels.Split(new[] { SEPARATOR }, StringSplitOptions.None);
            foreach (var token in tokens)
            {
                var sChannelId = token.Replace("(", "").Replace(")", "");
                if (lookup.ContainsKey(sChannelId)) { AddChannel(lookup[sChannelId]); }
            }
        }
        /// <summary>
        /// Generate a key like <groupName>_<channelName>_<channelType> and if the channel is squib "current", "_CU"
        /// </summary>
        /// <param name="ch"></param>
        /// <returns></returns>
        private string GetTestGraphKey(TestObjectChannel ch)
        {
            var key = string.Format("{0}_{1}_{2}", ch.TestObject.SerialNumber, ch.Name, ch.Channel.MMEChannelType);

            var sd = SensorsCollection.SensorsList.GetSensorBySerialNumber(ch.SensorSerialNumber);
            if (null == sd || !sd.IsDigitalOutput())
            {
                if ((sd != null) && (sd.Bridge == Test.Module.Channel.Sensor.BridgeType.SQUIB))
                {
                    if (ch.SquibChannelType == TestObjectChannel.SquibChannelTypes.Current)
                    {
                        key += CURRENT_SUFFIX;
                    }
                }
            }
            return key;
        }
        public string GetChannelsForSQL()
        {
            var sb = new StringBuilder();
            sb.Append("{");
            var bNeedSep = false;

            //we must "refresh" the channels we have as they are snapshotted from when the graph was created and the channels may have new ids
            //6991 Clicking save removes sensors from graph in test setup.
            var channelLookup = new Dictionary<string, TestObjectChannel>();
            foreach (var ch in _channels)
            {
                channelLookup[GetTestGraphKey(ch)] = ch;
            }
            foreach (var ch in AvailableChannels)
            {
                channelLookup[GetTestGraphKey(ch)] = ch;
            }
            var channelsAfterResolve = new List<TestObjectChannel>();

            foreach (var ch in _channels)
            {
                if (channelLookup.ContainsKey(GetTestGraphKey(ch)))
                {
                    channelsAfterResolve.Add(ch);
                }
            }

            _channels = channelsAfterResolve;
            foreach (var ch in Channels)
            {
                if (bNeedSep) { sb.Append(SEPARATOR); }
                else { bNeedSep = true; }
                sb.AppendFormat("({0})", ch.GetGraphID());
            }
            sb.Append("}");
            return sb.ToString();
        }

        private List<TestObjectChannel> _channels = new List<TestObjectChannel>();
        private readonly Dictionary<string, TestObjectChannel> _lookup = new Dictionary<string, TestObjectChannel>();

        public TestObjectChannel[] Channels
        {
            get
            {
                var toBeRemoved = new List<TestObjectChannel>();

                foreach (var ch in _channels)
                {
                    var found = false;
                    foreach (var group in _groups)
                    {
                        if (group.SerialNumber == ch.TestObject.SerialNumber)
                        {
                            found = true;
                        }
                    }
                    foreach (var addedGroup in _addedGroups)
                    {
                        if (addedGroup.SerialNumber == ch.TestObject.SerialNumber)
                        {
                            found = true;
                        }
                    }
                    if (!found)
                    {
                        toBeRemoved.Add(ch);
                    }
                }

                foreach (var ch in toBeRemoved)
                {
                    _channels.Remove(ch);
                }

                return _channels.ToArray();
            }
        }
        private void AddGroup(TestTestObject group)
        {
            _groups.Add(group);
        }
        private void AddAddedGroup(TestTestObject addedGroup)
        {
            _addedGroups.Add(addedGroup);
        }
        private void AddChannel(TestObjectChannel channel)
        {
            _channels.Add(channel);
            _lookup[channel.GetGraphID()] = channel;
            //OnPropertyChanged("Channels");
            //OnPropertyChanged("AvailableChannels");
        }
        private bool ContainsChannel(TestObjectChannel channel)
        {
            return _lookup.ContainsKey(channel.GetGraphID());
        }
        private bool ContainsCurrentChannel(TestObjectChannel channel)
        {
            if (channel.SquibChannelType == TestObjectChannel.SquibChannelTypes.Current)
            {
                return ContainsChannel(channel);
            }
            else
            {
                return _lookup.ContainsKey(channel.GetGraphID() + CURRENT_SUFFIX);
            }
        }
        private bool ContainsVoltageChannel(TestObjectChannel channel)
        {
            return ContainsChannel(channel);
        }
        public TestObjectChannel[] AvailableChannels
        {
            get
            {
                _lookup.Clear();
                foreach (var setChannel in _channels)
                {
                    _lookup[setChannel.GetGraphID()] = setChannel;
                }
                var channels = new List<TestObjectChannel>();
                if (_groups.Exists(to => !AddChannels(to, channels)))
                {
                    return null;
                }
                if (_addedGroups.Where(to => to.Hardware.Any()).Any(to => !AddChannels(to, channels)))
                {
                    return null;
                }
                channels.Sort();
                return channels.ToArray();
            }
        }

        private bool AddChannels(TestTestObject to, List<TestObjectChannel> channels)
        {
            var isoTestObject = to.GetISOTestObject();
            if (null == isoTestObject)
            {
                return false;
            }
            foreach (var channel in isoTestObject.AllChannels)
            {
                if (!channel.Required) { continue; }
                if (string.IsNullOrWhiteSpace(channel.SensorSerialNumber)) { continue; }
                var sd = SensorsCollection.SensorsList.GetSensorBySerialNumber(channel.SensorSerialNumber);
                if (null == sd || !sd.IsDigitalOutput())
                {
                    if ((sd != null) && (sd.Bridge == Test.Module.Channel.Sensor.BridgeType.SQUIB))
                    {
                        //Put squib channels (Current and/or Voltage) in the
                        //Available list if and only if they are not in the graph
                        if (!ContainsCurrentChannel(channel))
                        {
                            var currentChannel = new TestObjectChannel(channel, isoTestObject, new TestObjectTemplate().ToISOTestObjectTemplate())
                            {
                                SquibChannelType = TestObjectChannel.SquibChannelTypes.Current,
                                NameOfTheChannel = channel.Name + " " + "(Current)" //Strings.StringResources.Graph_SquibCurrent
                            };
                            channels.Add(currentChannel);
                        }

                        if (!ContainsVoltageChannel(channel))
                        {
                            channel.SquibChannelType = TestObjectChannel.SquibChannelTypes.Voltage;
                            channel.NameOfTheChannel = channel.Name + " " + "(Voltage)"; //Strings.StringResources.Graph_SquibVoltage;
                            channels.Add(channel);
                        }
                    }
                    else
                    {
                        if (ContainsChannel(channel)) { continue; }
                        channels.Add(channel);
                    }
                }
            }

            return true;
        }
        public string GraphName { get; set; } = "";
        public string GraphDescription { get; set; } = "";
        public bool UseDomainMin { get; set; }
        public double DomainMin { get; set; } = double.MinValue;
        public bool UseDomainMax { get; set; }
        public double DomainMax { get; set; } = double.MaxValue;
        public bool UseRangeMin { get; set; }
        public double RangeMin { get; set; } = double.MinValue;
        public bool UseRangeMax { get; set; }
        public double RangeMax { get; set; } = double.MaxValue;

        private List<double> _thresholds = new List<double>();
        public double[] Thresholds
        {
            get => _thresholds.ToArray();
            set => _thresholds = new List<double>(value);
        }

        private readonly TestTemplate _template;
        private List<TestTestObject> _groups = new List<TestTestObject>();
        private List<TestTestObject> _addedGroups = new List<TestTestObject>();
        public TestGraph(TestTemplate template)
        {
            _template = template;
            foreach (var group in _template.TestObjectsWithChannels)
            {
                AddGroup(new TestTestObject(group));
            }
            foreach (var addedGroup in _template.AddedGroups)
            {
                AddAddedGroup(new TestTestObject(addedGroup));
            }
        }
    }
}