using AutoMapper;
using MagicCarpetContracts.DataModels;
using MagicCarpetContracts.Exceptions;
using MagicCarpetContracts.Mapper;
using MagicCarpetContracts.Resources;
using MagicCarpetContracts.StoragesContracts;
using MagicCarpetDatabase.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Localization;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MagicCarpetDatabase.Implementations;

internal class SalaryStorageContract(MagicCarpetDbContext dbContext, IStringLocalizer<Messages> localizer) : ISalaryStorageContract
{
    private readonly MagicCarpetDbContext _dbContext = dbContext;
    private readonly IStringLocalizer<Messages> _localizer = localizer;

    public List<SalaryDataModel> GetList(DateTime? startDate, DateTime? endDate, string? employeeId = null)
    {
        try
        {
            var query = _dbContext.Salaries.Include(d => d.Employee).AsQueryable();
            if (startDate.HasValue)
                query = query.Where(x => x.SalaryDate >= DateTime.SpecifyKind(startDate ?? DateTime.UtcNow, DateTimeKind.Utc));
            if (endDate.HasValue)
                query = query.Where(x => x.SalaryDate <= DateTime.SpecifyKind(endDate ?? DateTime.UtcNow, DateTimeKind.Utc));
            if (employeeId != null)
                query = query.Where(x => x.EmployeeId == employeeId);
            return [.. query.Select(x => CustomMapper.MapObject<SalaryDataModel>(x))];
        }
        catch (Exception ex)
        {
            _dbContext.ChangeTracker.Clear();
            throw new StorageException(ex, _localizer);
        }
    }

    public async Task<List<SalaryDataModel>> GetListAsync(DateTime startDate, DateTime endDate, CancellationToken ct)
    {
        try
        {
            return [.. await _dbContext.Salaries.Include(x =>
                x.Employee).Where(x => x.SalaryDate >= DateTime.SpecifyKind(startDate, DateTimeKind.Utc) &&
                                      x.SalaryDate <= DateTime.SpecifyKind(endDate, DateTimeKind.Utc))
                .Select(x => CustomMapper.MapObject < SalaryDataModel >(x)).ToListAsync(ct)];
        }
        catch (Exception ex)
        {
            _dbContext.ChangeTracker.Clear();
            throw new StorageException(ex, _localizer);
        }
    }

    public void AddElement(SalaryDataModel salaryDataModel)
    {
        try
        {
            var salary = MapToEntity(salaryDataModel);

            _dbContext.Salaries.Add(salary);
            _dbContext.SaveChanges();
        }
        catch (Exception ex)
        {
            _dbContext.ChangeTracker.Clear();
            throw new StorageException(ex, _localizer);
        }
    }

    private Salary MapToEntity(SalaryDataModel dataModel)
    {
        var salary = CustomMapper.MapObject<Salary>(dataModel);
        salary.EmployeeSalary = dataModel.Salary;
        return salary;
    }
}