using System;
using System.Linq;
using EvoCalculator.Core.FinanceFormulas;
using EvoCalculator.Core.Models.Calculation.Models.Prepared;
using TridentGoalSeek;

namespace EvoCalculator.Core.Calculation.Columns
{
    public class SumColumn : BaseColumnWithXIRR, IGoalSeekAlgorithm
    {
        private readonly PreparedValues _preparedValues;
        private readonly PercentPaymentColumn _percentPaymentColumn;

        public SumColumn(int count, DateTempColumn dateTempColumn
            , PreparedValues preparedValues
            , PercentPaymentColumn percentPaymentColumn) : base(count, dateTempColumn)
        {
            this._preparedValues = preparedValues;
            this._percentPaymentColumn = percentPaymentColumn;
        }

        public void ComputeValues(double x)
        {
            Values[0] = -this._preparedValues.BaseCost;
            Values[1] = this._preparedValues.FirstPaymentSum;

            for (var i = 2; i < Values.Length - 1; i++)
            {
                Values[i] = x * _percentPaymentColumn.Values[i] / 100;
            }

            Values[^1] = _preparedValues.LastPaymentSum;
        }

        public decimal Calculate(decimal inputVariable)
        {
            var x = Convert.ToDouble(inputVariable);
            this.ComputeValues(x);
            var XIRR = new XIRR(Flows);
            IRR = XIRR.GetResult();

            return Convert.ToDecimal(IRR);
        }

        public void ComputeValues(decimal requiredIRR)
        {
            var goalSeek = new GoalSeek(this);
            goalSeek.SeekResult(requiredIRR,
                new GoalSeekOptions(
                    startingStabPoint: Convert.ToDecimal(this._preparedValues.BaseCost / this._preparedValues.Nmper)
                    , tineExplorePercentage: 10
                    // , maximumAttempts: 10000
                    // , initialTineSpacing: 1
                    // , focusPercentage: 100
                    // , trimFinalInputValue: true
                ));
        }
    }
}