using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using TheButcherShopContracts.BusinessLogicContracts;
using TheButcherShopContracts.DataModels;
using TheButcherShopContracts.Exceptions;
using TheButcherShopContracts.Extensions;
using TheButcherShopContracts.StoragesContracts;

namespace ButcherShopBusinessLogic.Implementations;

internal class SalaryBusinessLogicContract(ISalaryStorageContract salaryStorageContract,ISaleStorageContract saleStorageContract, IPostStorageContract postStorageContract, IWorkerStorageContract workerStorageContract, ILogger logger) : ISalaryBusinessLogicContract
{
    private readonly ILogger _logger = logger;
    private readonly ISalaryStorageContract _salaryStorageContract = salaryStorageContract;
    private readonly ISaleStorageContract _saleStorageContract = saleStorageContract;
    private readonly IPostStorageContract _postStorageContract = postStorageContract;
    private readonly IWorkerStorageContract _workerStorageContract = workerStorageContract;

    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);
        }
        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);
        }
        if (workerId.IsEmpty())
        {
            throw new ArgumentNullException(nameof(workerId));
        }
        if (!workerId.IsGuid())
        {
            throw new ValidationException("The value in the field workerId is not a unique identifier.");
        }
        _logger.LogInformation("GetAllSalaries params: {fromDate}, {toDate},{ workerId}", fromDate, toDate, workerId);
        return _salaryStorageContract.GetList(fromDate, toDate, workerId) ?? throw new NullListException();
    }

    public void CalculateSalaryByMounth(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 sales = _saleStorageContract.GetList(startDate, finishDate, workerId: worker.Id)?.Sum(x => x.Sum) ?? 
                throw new NullListException();
            var post = _postStorageContract.GetElementById(worker.PostId) ?? 
                throw new NullListException();
            var salary = post.Salary + sales * 0.1;
            _logger.LogDebug("The employee {workerId} was paid a salary of { salary}", worker.Id, salary);
            _salaryStorageContract.AddElement(new SalaryDataModel(worker.Id, finishDate, salary));
        }
    }
}