using DNTPersianUtils.Core;
using GozareshgirProgramManager.Application._Common.Interfaces;
using GozareshgirProgramManager.Application._Common.Models;
using GozareshgirProgramManager.Application.Modules.SalaryPaymentSettings.Queries.GetUserListWhoHaveSettings;
using GozareshgirProgramManager.Domain._Common;
using GozareshgirProgramManager.Domain.CheckoutAgg.Enums;
using Microsoft.EntityFrameworkCore;
using PersianDateTime = PersianTools.Core.PersianDateTime;

namespace GozareshgirProgramManager.Application.Modules.Checkouts.Queries.GetUserToGropCreate;

/// <summary>
/// دریافت کاربران برای ایجاد گروهی فیش حقوقی با سال و ماه
/// </summary>
public class GetUserToGroupCreatingQueryHandler : IBaseQueryHandler<GetUserToGroupCreatingQuery, GetUserToGroupCreatingResponse>
{
    private readonly IProgramManagerDbContext _context;

    public GetUserToGroupCreatingQueryHandler(IProgramManagerDbContext context)
    {
        _context = context;
    }

    public async Task<OperationResult<GetUserToGroupCreatingResponse>> Handle(GetUserToGroupCreatingQuery request, CancellationToken cancellationToken)
    {
        //سال و ماه انتخاب شده از فرانت
        var selectedDate = new DateTime();
        try
        {
            int year = Convert.ToInt32(request.Year);
            int month = Convert.ToInt32(request.Month);
            selectedDate = ($"{new PersianDateTime(year,month,1)}").ToGeorgianDateTime();
        }
        catch (Exception)
        {

            return OperationResult<GetUserToGroupCreatingResponse>.Failure(
                "خطا در ورود سال و ماه");
        }

        //آخرین تاریخ مجاز برای ایجاد فیش
        var lastMonth = ($"{DateTime.Now.ToFarsi().Substring(0, 8)}01").ToGeorgianDateTime().AddDays(-1);

        if (selectedDate > lastMonth)
            return OperationResult<GetUserToGroupCreatingResponse>.Failure(
                "ایجاد فیش فقط برای ماه های گذشته امکان پذیر است");


        //var lastMonthStart = lastMonth; 
        var lastMonthEnd = ((selectedDate.ToFarsi().FindeEndOfMonth())).ToGeorgianDateTime();  

        var query =
            await (from u in _context.Users

                    // LEFT JOIN
                    // تنظیمات حقوق
                    join s in _context.SalaryPaymentSettings
                        on u.Id equals s.UserId into sJoin
                    from s in sJoin.DefaultIfEmpty()

                    // LEFT JOIN 
                    //فیش
                    join ch in _context.Checkouts
                            .Where(x => x.CheckoutStartDate < lastMonthEnd
                                        && x.CheckoutEndDate > selectedDate)
                        on u.Id equals ch.UserId into chJoin
                    from ch in chJoin.DefaultIfEmpty()

                    group new { s, ch } by new { u.Id, u.FullName } into g

                    select new GetUserWhoHaveSettingsAndCheckoutDto
                    {
                        UserId = g.Key.Id,
                        FullName = g.Key.FullName,

                        HasSalarySettings = g.Any(x => x.s != null),
                        HasCheckout = g.Any(x => x.ch != null)
                    })
                .ToListAsync(cancellationToken);





        var responseList = query.Select(x =>
        {

            bool validToCreate = x.HasSalarySettings && !x.HasCheckout;
            string message = "آماده تنظیم";
            CreateCheckoutStatus createCheckoutStatus = CreateCheckoutStatus.ReadyToCreate;
            if (x.HasCheckout)
            {
                message = "موجود است";
                createCheckoutStatus = CreateCheckoutStatus.AlreadyCreated;
            }


            if (!x.HasSalarySettings)
            {
                message = "فاقد تنظیمات";
                createCheckoutStatus = CreateCheckoutStatus.NotSetSalaryPaymentSettings;
            }
                
    
            return new GetUserToGroupCreatingDto
            {
                UserId = x.UserId,
                FullName = x.FullName,
                IsValidToCreate = validToCreate,
                StatusMessage = message,
                CreateCheckoutStatus = createCheckoutStatus
               
            };
           
        }).OrderByDescending(x=>x.IsValidToCreate).ToList();

        var response = new GetUserToGroupCreatingResponse(responseList);

        return OperationResult<GetUserToGroupCreatingResponse>.Success(response);
    }
}


public record GetUserToGroupCreatingQuery(string Year, string Month) : IBaseQuery<GetUserToGroupCreatingResponse>;

public record GetUserToGroupCreatingResponse(List<GetUserToGroupCreatingDto> GetUserToGroupCreatingDtoList);

public record GetUserToGroupCreatingDto
{
    /// <summary>
    /// آی دی کاربر
    /// </summary>
    public long UserId { get; set; }

    /// <summary>
    /// نام کامل پرسنل
    /// </summary>
    public string FullName { get; set; }


    /// <summary>
    /// پیام وضعیت ایجاد فیش
    /// </summary>
    public string StatusMessage { get; set; }

    /// <summary>
    /// آیا مجاز به ایجاد فیش می باشد
    /// </summary>
    public bool IsValidToCreate { get; set; }

    public CreateCheckoutStatus CreateCheckoutStatus { get; set; }

}


public record GetUserWhoHaveSettingsAndCheckoutDto
{
    /// <summary>
    /// آی دی کاربر
    /// </summary>
    public long UserId { get; set; }

    /// <summary>
    /// نام کامل پرسنل
    /// </summary>
    public string FullName { get; set; }

    /// <summary>
    /// داشتن تنظیمات
    /// </summary>
    public bool HasSalarySettings { get; set; }


    public bool HasCheckout { get; set; }
}