using Microsoft.Extensions.Localization;
using Microsoft.Extensions.Logging;
using SmallSoftwareContracts.BusinessLogicsContracts;
using SmallSoftwareContracts.DataModels;
using SmallSoftwareContracts.Exceptions;
using SmallSoftwareContracts.Extensions;
using SmallSoftwareContracts.Infrastructure;
using SmallSoftwareContracts.Infrastructure.PostConfigurations;
using SmallSoftwareContracts.Resources;
using SmallSoftwareContracts.StoragesContracts;
namespace SmallSoftwareBusinessLogic.Implementations;


internal class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageContract,
    IRequestStorageContract requestStorageContract, IPostStorageContract postStorageContract, 
    IWorkerStorageContract workerStorageContract, IStringLocalizer<Messages> localizer, ILogger logger, IConfigurationSalary сonfiguration) : ISalaryBusinessLogicContract
{
    private readonly ILogger _logger = logger;
    private readonly ISalaryStorageContract _salaryStorageContract = salaryStorageContract;
    private readonly IRequestStorageContract _requestStorageContract = requestStorageContract;
    private readonly IPostStorageContract _postStorageContract = postStorageContract;
    private readonly IWorkerStorageContract _workerStorageContract = workerStorageContract;
    private readonly IConfigurationSalary _salaryConfiguration = сonfiguration;
    private readonly Lock _lockObject = new();
    private readonly IStringLocalizer<Messages> _localizer = localizer;
    public List<SalaryDataModel> GetAllSalariesByPeriod(DateTime fromDate,
    DateTime toDate)
    {
        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}",
        fromDate, toDate);
        if (fromDate.IsDateNotOlder(toDate))
        {
            throw new IncorrectDatesException(fromDate, toDate, _localizer);
        }
        return _salaryStorageContract.GetList(fromDate, toDate) ?? throw new
        NullListException();
    }
    public List<SalaryDataModel> GetAllSalariesByPeriodByWorker(DateTime
    fromDate, DateTime toDate, string workerId)
    {
        if (fromDate.IsDateNotOlder(toDate))
        {
            throw new IncorrectDatesException(fromDate, toDate, _localizer);
        }
        if (workerId.IsEmpty())
        {
            throw new ArgumentNullException(nameof(workerId));
        }
        if (!workerId.IsGuid())
        {
            throw new ValidationException(string.Format(localizer["ValidationExceptionMessageNotAId"], "WorkerId"));
        }
        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}, { workerId} ", fromDate, toDate, workerId);
        return _salaryStorageContract.GetList(fromDate, toDate, workerId) ??
        throw new NullListException();
    }


    public void CalculateSalaryByMonth(DateTime date)
    {
        _logger.LogInformation("CalculateSalaryByMounth: {date}", date);
        var startDate = new DateTime(date.Year, date.Month, 1);
        var finishDate = new DateTime(date.Year, date.Month, DateTime.DaysInMonth(date.Year, date.Month));
        var workers = _workerStorageContract.GetList() ?? throw new NullListException();
        foreach (var worker in workers)
        {
            var requests = _requestStorageContract.GetList(startDate, finishDate, workerId: worker.Id) ?? throw new NullListException();
            var post = _postStorageContract.GetElementById(worker.PostId) ??
                throw new NullListException();
            var salary = worker.ConfigurationModel switch
            {
                null => 0,
                CashierPostConfiguration cpc => CalculateSalaryForCashier(requests, startDate, finishDate, cpc),
                SupervisorPostConfiguration spc => CalculateSalaryForSupervisor(startDate, finishDate, spc),
                PostConfiguration pc => pc.Rate,
            };
            _logger.LogDebug("The employee {workerId} was paid a salary of {salary}", worker.Id, salary);
            _salaryStorageContract.AddElement(new SalaryDataModel(worker.Id, finishDate, salary));
        }
    }
    private double CalculateSalaryForCashier(List<RequestDataModel> requests, DateTime startDate, DateTime finishDate, CashierPostConfiguration config)
    {
        var parallelOptions = new ParallelOptions
        {
            MaxDegreeOfParallelism = _salaryConfiguration.MaxConcurrentThreads
        };

        double calcPercent = 0.0;
        var dates = new List<DateTime>();

        for (var date = startDate; date < finishDate; date = date.AddDays(1))
        {
            dates.Add(date);
        }

        Parallel.ForEach(dates, parallelOptions, date =>
        {
            var requestsInDay = requests.Where(x => x.RequestDate >= date && x.RequestDate < date.AddDays(1)).ToArray();
            if (requestsInDay.Length > 0)
            {
                double dailySum = requestsInDay.Sum(x => x.Sum);
                double dailyAverage = dailySum / requestsInDay.Length;
                double dailyPercent = dailyAverage * config.SalePercent;

                lock (_lockObject)
                {
                    calcPercent += dailyPercent;
                }
            }
        });

        double bonus = 0;
        try
        {
            bonus = requests
                .AsParallel()
                .WithDegreeOfParallelism(_salaryConfiguration.MaxConcurrentThreads)
                .Where(x => x.Sum > _salaryConfiguration.ExtraSaleSum)
                .Sum(x => x.Sum * config.BonusForExtraSales);
        }
        catch (AggregateException agEx)
        {
            foreach (var ex in agEx.InnerExceptions)
            {
                _logger.LogError(ex, "Error calculating bonus in cashier payroll");
            }
            return 0;
        }

        return config.Rate + calcPercent + bonus;
    }

    private double CalculateSalaryForSupervisor(DateTime startDate, DateTime finishDate, SupervisorPostConfiguration config)
    {
        try
        {
            return config.Rate + config.PersonalCountTrendPremium *
            _workerStorageContract.GetWorkerTrend(startDate, finishDate);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Error in the supervisor payroll process");
            return 0;
        }
    }
}