using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.DispenserAnalyzer.UI.Analysis;
using Tango.DispenserAnalyzer.UI.Models;

namespace Tango.DispenserAnalyzer.UI.Analyzers
{
    [Analyzer("sealtest")]
    public class SealingAnalyzer : IDispenserDispenserAnalyser
    {
        private IReader<DispenserSample> _reader;
        public IReader<DispenserSample> Reader
        {
            get { return _reader; }
            set { _reader = value; }
        }

        public SealingAnalyzer()
        {
            Reader = new DispenserReader();
        }
        public Task<List<IAnalyzerResult>> Process(List<DispenserSample> csvRows, bool backgroundMode)
        {
            return Task.Factory.StartNew<List<IAnalyzerResult>>(() =>
            {
                List<IAnalyzerResult> results = new List<IAnalyzerResult>();
                List<DispenserSample> commands = csvRows.Where(x => x.Command!= null && x.Command.ToLower().Contains("label")).ToList< DispenserSample>();
                SealingAnalyzerResult result = new SealingAnalyzerResult();
                var pairs = commands.Select((x, i) => new { Index = i, Value = x }).GroupBy(x => x.Index /2).Select(x => x.Select(v => v.Value).ToList()).ToList();
                //start range of test
                if (pairs.Count > 0 && pairs[0].Count > 1)
                {
                    List<DispenserSample> rangeTestValues = csvRows.Where(x => x.Index > pairs[0][0].Index && x.Index < pairs[0][1].Index).ToList();
                    result.AverageStartTestValue = rangeTestValues.Average(t => t.Pressure);
                }
                //end range of test
                if (pairs.Count > 1 && pairs[1].Count > 1)
                {
                    List<DispenserSample> rangeTestValues = csvRows.Where(x => x.Index > pairs[1][0].Index && x.Index < pairs[1][1].Index).ToList();
                    result.AverageEndTestValue = rangeTestValues.Average(t => t.Pressure); ;
                }
                result.AbsoluteTestValue = Math.Abs(result.AverageEndTestValue - result.AverageStartTestValue);
                result.Result = result.AbsoluteTestValue < 8 ? AnalyzerResultValue.Passed : AnalyzerResultValue.Failed;
                results.Add(result);
                return results;
            });
        }

        public void GetPoints(List<DispenserSample> samples, IList<OxyPlot.DataPoint> points)
        {
            samples.ForEach(x =>
            {
                if (x.Pressure != 0.0)
                { points.Add(new OxyPlot.DataPoint(x.Index, x.Pressure)); }
            });
        }

        public bool ShowChartAfterProcess { get { return true; } }

        public bool AvailableCompareResults { get { return false; } }

    }

    public class SealingAnalyzerResult : AnalyzerResultBase
    {
        [Description("Average Start Test Value")]
        public double AverageStartTestValue { get; set; }
        [Description("Average End Test Value")]
        public double AverageEndTestValue { get; set; }
        [Description("Absolute Value")]
        public double AbsoluteTestValue { get; set; }
        public SealingAnalyzerResult()
        {
            AverageStartTestValue = 0.0;
            AverageEndTestValue = 0.0;
            AbsoluteTestValue = 0.0;
            Result = AnalyzerResultValue.Undetermined;
        }
    }
}