using System;
using System.Linq;
using EvoCalculator.Core.Base.Columns;
using EvoCalculator.Core.Models.PostCalculation.Models.Prepared;
using EvoCalculator.Core.Models.PostCalculation.Models.Prepared.PreparedTables;

namespace EvoCalculator.Core.PostCalculation.v1;

public class NextValues
{
    public decimal AcquisitionExpenses;
    public decimal BaseCost;
    public decimal NiAtInception;
    public decimal NiAtInceptionMSFO;
    public int Nmper;
    protected PreparedValues preparedValues;
    public decimal SumTotal;

    public NextValues(PreparedValues preparedValues)
    {
        this.preparedValues = preparedValues;
    }

    public void ComputeAcquisitionExpenses(TableInsuranceRow[]? nextTableInsurance)
    {
        var tracker = 0m;
        if (preparedValues.TrackerCost.Next == 0)
            tracker = preparedValues.TrackerCost.Current;
        else if (preparedValues.TypeChangeTracker == 100000000)
            tracker = preparedValues.TrackerCost.Current + preparedValues.TrackerCost.Next;
        else
            tracker = preparedValues.TrackerCostRemove + preparedValues.TrackerCost.Next;

        var tlm = 0m;
        if (preparedValues.TLMCost.Next == 0)
            tlm = preparedValues.TLMCost.Current;
        else if (preparedValues.TypeChangeTLM == 100000000)
            tlm = preparedValues.TLMCost.Current + preparedValues.TLMCost.Next;
        else
            tlm = preparedValues.TLMCostRemove + preparedValues.TLMCost.Next;


        var baseRegistration = 0m;
        if (preparedValues.BaseRegistration.Next == 0)
            baseRegistration = preparedValues.BaseRegistration.Current;
        else if (preparedValues.TypeChangeRegistration == 100000000)
            baseRegistration = preparedValues.BaseRegistration.Next;
        else
            baseRegistration = preparedValues.BaseRegistration.Current + preparedValues.BaseRegistration.Next;


        var nextCostInsurance = 0m;
        if (nextTableInsurance != null)
            nextCostInsurance = nextTableInsurance
                .Where(x => x.TypeRiskInsurance is "KASKO" or "OSAGO" or "GAP" && x.PeriodNumberInsurance == 1)
                .Sum(x => x.CostInsurance);


        AcquisitionExpenses = preparedValues.PlPrice.Next
                              + nextCostInsurance
                              - preparedValues.ComissionRub
                              - preparedValues.Discount.Next
                              + tracker
                              + tlm
                              + preparedValues.TechnicalCardSum
                              + baseRegistration
                              + preparedValues.TransportTaxGr.Next switch
                              {
                                  > 0 => preparedValues.TransportTaxGr.Next,
                                  _ => preparedValues.TransportTaxGr.Current
                              }
                              + preparedValues.InceptDelta;

        if (AcquisitionExpenses <= 0)
            throw new Exception(
                "Невозможно осуществить расчет графика, при заданных параметрах получаются отрицательные значения nextValues. Измените параметры для расчета.");
    }

    public void ComputeBaseCost(TableInsuranceRow[]? nextTableInsurance,
        BaseColumn<decimal>? nextTLMGrColumn, TablePaymentsRow[] currentTablePayments)
    {
        var registration = 0m;
        if (preparedValues.Registration.Next == 0)
            registration = preparedValues.Registration.Current;
        else if (preparedValues.TypeChangeRegistration == 100000000)
            registration = preparedValues.Registration.Next;
        else
            registration = preparedValues.Registration.Current + preparedValues.Registration.Next;


        var tracker = 0m;
        if (preparedValues.TrackerCost.Next == 0)
            tracker = preparedValues.TrackerCost.Current;
        else if (preparedValues.TypeChangeTracker == 100000000)
            tracker = preparedValues.TrackerCost.Current + preparedValues.TrackerCost.Next;
        else
            tracker = preparedValues.TrackerCostRemove + preparedValues.TrackerCost.Next;

        var tlm = 0m;
        if (preparedValues.TLMCost.Next == 0)
            tlm = preparedValues.TLMCost.Current;
        else if (preparedValues.TypeChangeTLM == 100000000)
            tlm = preparedValues.TLMCost.Current + preparedValues.TLMCost.Next;
        else
            tlm = preparedValues.TLMCostRemove + preparedValues.TLMCost.Next;

        var nextTlmGrValue = 0m;
        if (nextTLMGrColumn != null)
            nextTlmGrValue = nextTLMGrColumn.GetValue(0);


        var nextCostInsurance = 0m;
        if (nextTableInsurance != null)
            nextCostInsurance = nextTableInsurance
                .Where(x => x.TypeRiskInsurance is "KASKO" or "OSAGO" or "GAP")
                .Sum(x => x.CostInsurance);

        BaseCost = (preparedValues.PlPrice.Next
                    + nextCostInsurance
                    + preparedValues.TechnicalCardSum
                    + registration
                    + preparedValues.TransportTaxGr.Next switch
                    {
                        > 0 => preparedValues.TransportTaxGr.Next,
                        _ => preparedValues.TransportTaxGr.Current
                    }
                    + tracker
                    + tlm
                    + nextTlmGrValue)
                   * preparedValues.Leasing0K
                   + currentTablePayments.Sum(x => x.NSIBBruttoPayment)
                   + preparedValues.InceptDelta;

        // PostCheck
        if (BaseCost <= 0)
            throw new Exception(
                "Невозможно осуществить расчет графика, при заданных параметрах получаются отрицательные значения nextValues. Измените параметры для расчета.");
    }

    public void ComputeNiAtInception(TablePaymentsRow[] currentTablePayments)
    {
        NiAtInception = AcquisitionExpenses - currentTablePayments[0].SumPayment;
    }

    public void ComputeNiAtInceptionMSFO()
    {
        NiAtInceptionMSFO = NiAtInception
                            + preparedValues.BonusManagerLeasing
                            + preparedValues.BonusManagerProducts
                            + preparedValues.BonusManagerLeasingExtra
                            + preparedValues.AgentFLSum
                            + preparedValues.AgentULSum;
    }

    public void ComputeNmper(TablePaymentsRow[] nextTablePayments, TablePaymentsRow[] currentTablePayments)
    {
        var targetNextPaymentsRow = nextTablePayments.Last();
        var n = targetNextPaymentsRow.NumberPayment;

        var targetPaymentSum = targetNextPaymentsRow.SumPayment;
        var i = 0;
        while (targetPaymentSum >= currentTablePayments[i + n].SumPayment)
        {
            targetPaymentSum -= currentTablePayments[i + n].SumPayment;
            i++;
        }

        if (i == 0)
            throw new Exception(
                "Невозможно осуществить расчет ЧДП с изменением срока. Необходимо увеличить сумму ЧДП");

        Nmper = preparedValues.Nmper.Current - i + 1;

        // PostCheck
        if (Nmper < 13 && preparedValues.BalanceHolder.Next == 100000001)
            throw new Exception(
                "По итогам расчета срок лизинга получается меньше 13, при балансе ЛД это запрещено. Измените параметры для расчета");
    }

    public void ComputeSumTotal(BaseColumn<decimal> nextSumWithVATColumn)
    {
        SumTotal = preparedValues.TotalExpected
                   - (preparedValues.TotalExpected - nextSumWithVATColumn.GetValue(0))
                   * (decimal) preparedValues.Repayment;
    }
}