using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Kurs.Platform.Entities;
using Microsoft.AspNetCore.Authorization;
using Volo.Abp.Domain.Repositories;

namespace Kurs.Platform.Public;

[Authorize]
public class IntranetAppService : PlatformAppService, IIntranetAppService
{
    private readonly IRepository<Event, Guid> _eventRepository;
    private readonly IRepository<EventCategory, Guid> _eventCategoryRepository;
    private readonly IRepository<EventType, Guid> _eventTypeRepository;
    private readonly IRepository<EventPhoto, Guid> _eventPhotoRepository;
    private readonly IRepository<EventComment, Guid> _eventCommentRepository;
    private readonly IRepository<Employee, Guid> _employeeRepository;

    public IntranetAppService(
        IRepository<Event, Guid> eventRepository,
        IRepository<EventCategory, Guid> eventCategoryRepository,
        IRepository<EventType, Guid> eventTypeRepository,
        IRepository<EventPhoto, Guid> eventPhotoRepository,
        IRepository<EventComment, Guid> eventCommentRepository,
        IRepository<Employee, Guid> employeeRepository)
    {
        _eventRepository = eventRepository;
        _eventCategoryRepository = eventCategoryRepository;
        _eventTypeRepository = eventTypeRepository;
        _eventPhotoRepository = eventPhotoRepository;
        _eventCommentRepository = eventCommentRepository;
        _employeeRepository = employeeRepository;
    }

    public async Task<IntranetDashboardDto> GetIntranetDashboardAsync()
    {
        return new IntranetDashboardDto
        {
            Events = await GetUpcomingEventsAsync()
        };
    }

    private async Task<List<EventDto>> GetUpcomingEventsAsync()
    {
        var events = await _eventRepository
            .WithDetailsAsync(e => e.Category, e => e.Type, e => e.Category, e => e.Photos, e => e.Comments)
            .ContinueWith(t => t.Result.ToList().Where(e => e.isPublished).OrderByDescending(e => e.CreationTime));

        var result = new List<EventDto>();
        foreach (var evt in events)
        {
            var employee = await _employeeRepository
                .WithDetailsAsync(e => e.JobPosition)
                .ContinueWith(t => t.Result.FirstOrDefault(e => e.Id == evt.EmployeeId));

            if (employee != null)
            {
                var calendarEvent = new EventDto
                {
                    Id = evt.Id.ToString(),
                    Name = evt.Name,
                    Description = evt.Description,
                    TypeName = evt.Type?.Name,
                    CategoryName = evt.Category?.Name,
                    Date = evt.Date,
                    Place = evt.Place,
                    Organizer = new EventOrganizerDto
                    {
                        Id = employee.Id,
                        Name = employee.FullName,
                        Position = employee.JobPosition.Name,
                        Avatar = employee.Avatar
                    },
                    Participants = evt.ParticipantsCount,
                    Photos =  [],
                    Comments = [],
                    Likes = evt.Likes,
                    IsPublished = evt.isPublished
                };

                // Comment'lerin author bilgilerini doldur
                if (evt.Comments != null && evt.Comments.Any())
                {
                    foreach (var comment in evt.Comments)
                    {
                        var commentAuthor = await _employeeRepository
                            .WithDetailsAsync(e => e.JobPosition)
                            .ContinueWith(t => t.Result.FirstOrDefault(e => e.Id == comment.EmployeeId));

                        if (commentAuthor != null)
                        {
                            calendarEvent.Comments.Add(new EventCommentDto
                            {
                                Id = comment.Id.ToString(),
                                Author = new EventOrganizerDto
                                {
                                    Id = commentAuthor.Id,
                                    Name = commentAuthor.FullName,
                                    Position = commentAuthor.JobPosition.Name,
                                    Avatar = commentAuthor.Avatar
                                },
                                Content = comment.Content,
                                CreationTime = comment.CreationTime,
                                Likes = comment.Likes
                            });
                        }
                    }
                }

                result.Add(calendarEvent);
            }
        }

        return result;
    }
}