using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using PuferFishContracts.BusinessLogicsContracts;
using PuferFishContracts.DataModels;
using PuferFishContracts.Enums;
using PuferFishContracts.Exceptions;
using PuferFishContracts.Extensions;
using PuferFishContracts.StoragesContracts;

namespace PuferFishBusinessLogic.Implementations;

internal class PointsBusinessLogicContract(IPointsStorageContract pointsStorageContract, ISaleStorageContract saleStorageContract, IBuyerStorageContract buyerStorageContract, ILogger logger) : IPointsBusinessLogicContract
{
    private readonly ILogger _logger = logger;
    private readonly IPointsStorageContract _pointsStorageContract = pointsStorageContract;
    private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
    private readonly IBuyerStorageContract _buyerStorageContract = buyerStorageContract;

    public List<PointsDataModel> GetAllPointsByPeriod(DateTime fromDate, DateTime toDate)
    {
        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}",
        fromDate, toDate);
        if (fromDate.IsDateNotOlder(toDate))
        {
            throw new IncorrectDatesException(fromDate, toDate);
        }
        return _pointsStorageContract.GetList(fromDate, toDate) ?? throw new
        NullListException();
    }
    public List<PointsDataModel> GetAllPointsByPeriodByBuyer(DateTime fromDate, DateTime toDate, string buyerId)
    {
        if (fromDate.IsDateNotOlder(toDate))
        {
            throw new IncorrectDatesException(fromDate, toDate);
        }
        if (buyerId.IsEmpty())
        {
            throw new ArgumentNullException(nameof(buyerId));
        }
        if (!buyerId.IsGuid())
        {
            throw new ValidationException("The value in the field buyerId is not a unique identifier.");
        }
        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate}, { buyerId}", fromDate, toDate, buyerId);
        return _pointsStorageContract.GetList(fromDate, toDate, buyerId) ??
        throw new NullListException();
    }
    public void CalculatePointsByMounth(DateTime date)
    {
        _logger.LogInformation("CalculatePointsByMonth: {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 buyers = _buyerStorageContract.GetList() ?? throw new NullListException();

        foreach (var buyer in buyers)
        {
            var points = buyer.Points;

            _logger.LogDebug("The buyer {buyerId} was awarded {points} points", buyer.Id, points);

            _pointsStorageContract.AddElement(new PointsDataModel(buyer.Id, finishDate, points));
        }
    }
}