using Indotalent.Infrastructure.Database;
using MediatR;
using Microsoft.EntityFrameworkCore;

namespace Indotalent.Features.Leave.LeaveBalance.Cqrs;

public class GetLeaveBalanceByIdResponse
{
    public string? Id { get; set; }
    public string? AutoNumber { get; set; }
    public string? EmployeeId { get; set; }
    public string? EmployeeName { get; set; }
    public string? LeaveCategoryId { get; set; }
    public string? LeaveCategoryName { get; set; }
    public int Entitlement { get; set; }
    public int Used { get; set; }
    public int Pending { get; set; }
    public int Remaining { get; set; }
    public int Year { get; set; }
    public DateTime ValidFrom { get; set; }
    public DateTime ValidTo { get; set; }
    public int CarryForward { get; set; }
    public DateTimeOffset? CreatedAt { get; set; }
    public string? CreatedBy { get; set; }
    public DateTimeOffset? UpdatedAt { get; set; }
    public string? UpdatedBy { get; set; }
}

public record GetLeaveBalanceByIdQuery(string Id) : IRequest<GetLeaveBalanceByIdResponse?>;

public class GetLeaveBalanceByIdHandler : IRequestHandler<GetLeaveBalanceByIdQuery, GetLeaveBalanceByIdResponse?>
{
    private readonly AppDbContext _context;

    public GetLeaveBalanceByIdHandler(AppDbContext context) => _context = context;

    public async Task<GetLeaveBalanceByIdResponse?> Handle(GetLeaveBalanceByIdQuery request, CancellationToken cancellationToken)
    {
        return await _context.LeaveBalance
            .AsNoTracking()
            .Include(x => x.Employee)
            .Include(x => x.LeaveCategory)
            .Where(x => x.Id == request.Id)
            .Select(x => new GetLeaveBalanceByIdResponse
            {
                Id = x.Id,
                AutoNumber = x.AutoNumber,
                EmployeeId = x.EmployeeId,
                EmployeeName = x.Employee != null ? $"{x.Employee.FirstName} {x.Employee.LastName}" : string.Empty,
                LeaveCategoryId = x.LeaveCategoryId,
                LeaveCategoryName = x.LeaveCategory != null ? x.LeaveCategory.Name : string.Empty,
                Entitlement = x.Entitlement,
                Used = x.Used,
                Pending = x.Pending,
                Remaining = x.Remaining,
                Year = x.Year,
                ValidFrom = x.ValidFrom,
                ValidTo = x.ValidTo,
                CarryForward = x.CarryForward,
                CreatedAt = x.CreatedAt,
                CreatedBy = x.CreatedBy,
                UpdatedAt = x.UpdatedAt,
                UpdatedBy = x.UpdatedBy
            })
            .FirstOrDefaultAsync(cancellationToken);
    }
}