using Volo.Abp.Domain.Repositories;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Volo.Abp.DependencyInjection;
using Volo.Abp.MultiTenancy;
using Volo.Abp.Users;
using HospitalManagementSystem.Documents;
using HospitalManagementSystem.Patients.Dto;
using HospitalManagementSystem.Patients;
using HospitalManagementSystem.Permissions;
using Microsoft.AspNetCore.Authorization;
using HospitalManagementSystem.Appoinments.Dto;
using Volo.Abp.ObjectMapping;
using HospitalManagementSystem.Dto;
using Abp.Application.Services.Dto;
using Microsoft.EntityFrameworkCore;
using System.Linq.Dynamic.Core;
using Abp.UI;
using HospitalManagementSystem.Doctors;
using ClosedXML.Excel;
using System.IO;
using Microsoft.AspNetCore.Hosting;

namespace HospitalManagementSystem.Appointments
{
    public class AppointmentAppService : ApplicationService, IAppointmentAppService, ITransientDependency
    {
        private readonly ICurrentUser _currentUser;
        private readonly ICurrentTenant _currentTenant;
        private IRepository<Appointment, Guid> _appointmentsRepository;
        private readonly IRepository<Doctor, Guid> _doctorRepository;
        private readonly IWebHostEnvironment _env;

        public AppointmentAppService(ICurrentUser currentUser, ICurrentTenant currentTenant, IRepository<Appointment, Guid> appointmentsRepository, IRepository<Doctor, Guid> doctorRepository, IWebHostEnvironment env)
        {
            _currentUser = currentUser;
            _currentTenant = currentTenant;
            _appointmentsRepository = appointmentsRepository;
            _doctorRepository = doctorRepository;
            _env = env;
        }
        public async Task<string> GetAsync()
        {
            var x = _currentUser.Id;
            var y = _currentTenant.Id;
            return _currentUser.Name + " checking done.";
        }
        #region Get Patient List with Paging and Searching
        public async Task<PagedResultDto<AppointmentDto>> GetAppointmentListAsync(PagingSortResultDto input)
        {
            var queryable = await _appointmentsRepository.GetQueryableAsync();

            var filteredQuery = queryable
                .WhereIf(!string.IsNullOrEmpty(input.Search), x => x.FirstName.ToLower().Contains(input.Search.ToLower()) || x.LastName.ToLower().Contains(input.Search.ToLower()));

            var totalCount = await filteredQuery.CountAsync();

            filteredQuery = !string.IsNullOrEmpty(input.Sorting)
                ? filteredQuery.OrderBy(input.Sorting)
                : filteredQuery.OrderBy(x => x.Id);

            var pagedQuery = await filteredQuery
                .Skip(input.SkipCount)
                .Take(input.MaxResultCount)
                .ToListAsync();
            var appoinmentdto = ObjectMapper.Map<List<Appointment>, List<AppointmentDto>>(pagedQuery);

            return new PagedResultDto<AppointmentDto>(
                totalCount,
                appoinmentdto
            );

        }
        #endregion
        #region Get Appointment by ID
        public async Task<AppointmentDto> GetAppointmentByIdAsync(Guid id)
        {
            var appointment = await _appointmentsRepository.FirstOrDefaultAsync(x => x.Id == id);

            if (appointment == null)
            {
                throw new UserFriendlyException("Appointment Details not found");
            }

            return ObjectMapper.Map<Appointment, AppointmentDto>(appointment);
        }

        #endregion
        #region Create Appointment
        public async Task CreateAppointmentAsync(CreateOrUpdateAppointmentDto input)
        {
            Appointment appointment = new Appointment();

            var newdata = ObjectMapper.Map<CreateOrUpdateAppointmentDto, Appointment>(input);
            newdata.Doctor = await _doctorRepository.GetAsync(input.DoctorId.Value);
            appointment = newdata;
            appointment = await _appointmentsRepository.InsertAsync(appointment);

        }
        #endregion

        #region Update Appointment
        public async Task UpdateAppointmentAsync(CreateOrUpdateAppointmentDto input)
        {
            try
            {
                //var appointment = await _appointmentsRepository.GetAsync(input.Id);
                Appointment appointment = new Appointment();
                var newdata = ObjectMapper.Map<CreateOrUpdateAppointmentDto, Appointment>(input);
                newdata.Doctor = await _doctorRepository.GetAsync(input.DoctorId.Value);
                appointment = newdata;
                appointment = await _appointmentsRepository.UpdateAsync(appointment);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }
        #endregion

        #region Delete Appointment
        [Authorize(HospitalManagementSystemPermissions.Patient.Delete)]
        public async Task DeleteAppointmentRecordAsync(Guid id)
        {
            await _appointmentsRepository.DeleteAsync(id);
        }
        #endregion
        #region Export Appointment Data to Excel
        public async Task<FileDownloadDto> GetExportAppointmentRecordAsync()
        {
            var Appointmentrecord = await _appointmentsRepository.GetQueryableAsync().Result.ToListAsync();

            var folderPath = Path.Combine(_env.WebRootPath, "temp");
            if (!Directory.Exists(folderPath))
            {
                Directory.CreateDirectory(folderPath); // Ensure the folder exists
            }

            var filename = "Appointments_" + DateTime.Now.ToString("yyyyMMdd_HHmmss") + ".xlsx";
            var filePath = Path.Combine(folderPath, filename);

            // Create a workbook and worksheet
            using (var workbook = new XLWorkbook())
            {
                var worksheet = workbook.Worksheets.Add("Appointment");

                // Add headers
                worksheet.Cell(1, 1).Value = "Name";
                worksheet.Cell(1, 2).Value = "Email";
                worksheet.Cell(1, 3).Value = "Gender";
                worksheet.Cell(1, 4).Value = "Date";
                worksheet.Cell(1, 5).Value = "Time";
                worksheet.Cell(1, 6).Value = "Mobile";
                worksheet.Cell(1, 7).Value = "Doctor";
                worksheet.Cell(1, 8).Value = "Injury";
                worksheet.Cell(1, 9).Value = "Appointment Status";
                worksheet.Cell(1, 10).Value = "Visit Type";
                worksheet.Cell(1, 11).Value = "Payment Status";
                worksheet.Cell(1, 12).Value = "Insurance Provider";
                worksheet.Cell(1, 13).Value = "Notes";

                for (int i = 0; i < Appointmentrecord.Count; i++)
                {
                    worksheet.Cell(i + 2, 1).Value = Appointmentrecord[i].FirstName + "" + Appointmentrecord[i].LastName;
                    worksheet.Cell(i + 2, 2).Value = Appointmentrecord[i].Email;
                    worksheet.Cell(i + 2, 3).Value = Appointmentrecord[i].Gender.ToString();
                    worksheet.Cell(i + 2, 4).Value = Appointmentrecord[i].DateOfAppointment?.ToShortDateString();
                    worksheet.Cell(i + 2, 5).Value = Appointmentrecord[i].TimeOfAppointment;
                    worksheet.Cell(i + 2, 6).Value = Appointmentrecord[i].Mobile;
                    worksheet.Cell(i + 2, 7).Value = "";
                    worksheet.Cell(i + 2, 8).Value = Appointmentrecord[i].InjuryORContion;
                    worksheet.Cell(i + 2, 9).Value = Appointmentrecord[i].AppointmentStatus.ToString();
                    worksheet.Cell(i + 2, 10).Value = Appointmentrecord[i].VisitType.ToString();
                    worksheet.Cell(i + 2, 11).Value = Appointmentrecord[i].PaymentStatus.ToString();
                    worksheet.Cell(i + 2, 12).Value = Appointmentrecord[i].InsuranceProvider;
                    worksheet.Cell(i + 2, 13).Value = Appointmentrecord[i].Note;
                }

                worksheet.Columns().AdjustToContents();
                workbook.SaveAs(filePath);
            }

            byte[] fileBytes = await File.ReadAllBytesAsync(filePath);
            File.Delete(filePath);

            return new FileDownloadDto
            {
                FileName = filename,
                FileContent = Convert.ToBase64String(fileBytes) // Use Base64 encoding for file content
            };
        }

        #endregion
    }
}