using AutoMapper;
using Koogle.Application.DTOs;
using Koogle.Application.Interfaces;
using Koogle.Domain.Interfaces;
using KoogleApp.Data;
using KoogleApp.Entities;
using Microsoft.AspNetCore.Authorization;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Internal;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Koogle.Application.Services
{
    public class DayService(
        IDbContextFactory<AppDbContext> contextFactory,
        IDayRepository goalRepository,
        IMapper mapper,
        ICurrentUserService currentUserService,
        IAuthorizationService authorizationService)
        : IDayService
    {
        private readonly IDayRepository _goalRepository = goalRepository;
        private readonly ICurrentUserService _currentUserService = currentUserService;
        private readonly IAuthorizationService _authorizationService = authorizationService;

        public async Task<PagedResultDto<DaySummaryDto>> GetAllAsync(DayFilterDto filter, CancellationToken cancellationToken = default)
        {
            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);

            var query = context.Days
                .Include(g => g.Members)
                //.Include(g => g.Status)
                //.Include(g => g.ActualValues.Where(av => !av.IsDeleted))
                .AsQueryable();

            // Filter anwenden
            query = ApplyFilters(query, filter);

            // Gesamtanzahl ermitteln
            var totalCount = await query.CountAsync(cancellationToken);

            // Sortierung anwenden
            //query = ApplySorting(query, filter);

            // Paginierung anwenden
            var goals = await query
                .Skip(filter.Skip)
                .Take(filter.PageSize)
                .ToListAsync(cancellationToken);

            var items = mapper.Map<List<DaySummaryDto>>(goals);

            return new PagedResultDto<DaySummaryDto>
            {
                Items = items,
                TotalCount = totalCount,
                Page = filter.Page,
                PageSize = filter.PageSize
            };
        }

        /// <summary>
        /// Wendet Filter auf die Abfrage an.
        /// </summary>
        private static IQueryable<Day> ApplyFilters(IQueryable<Day> query, DayFilterDto filter)
        {
            //if (!string.IsNullOrWhiteSpace(filter.SearchTerm))
            //{
            //    var searchTerm = filter.SearchTerm.ToLower();
            //    query = query.Where(g =>
            //        g.Name.ToLower().Contains(searchTerm) ||
            //        (g.Description != null && g.Description.ToLower().Contains(searchTerm)));
            //}

            //if (filter.CompanyId.HasValue)
            //{
            //    query = query.Where(g => g.CompanyId == filter.CompanyId.Value);
            //}

            //if (filter.CompanyIds?.Count > 0)
            //{
            //    query = query.Where(g => filter.CompanyIds.Contains(g.CompanyId));
            //}

            //if (filter.YearId.HasValue)
            //{
            //    query = query.Where(g => g.YearId == filter.YearId.Value);
            //}

            //if (filter.Year.HasValue)
            //{
            //    query = query.Where(g => g.Year.YearNumber == filter.Year.Value);
            //}

            //if (filter.GoalType.HasValue)
            //{
            //    query = query.Where(g => g.GoalType == filter.GoalType.Value);
            //}

            //if (filter.TagId.HasValue)
            //{
            //    query = query.Where(g => g.Tags.Any(t => t.Id == filter.TagId.Value));
            //}

            //if (filter.TagIds?.Count > 0)
            //{
            //    query = query.Where(g => g.Tags.Any(t => filter.TagIds.Contains(t.Id)));
            //}

            //if (filter.OwnerId.HasValue)
            //{
            //    query = query.Where(g => g.GoalOwners.Any(go => go.UserId == filter.OwnerId.Value));
            //}

            //if (filter.IsInherited.HasValue)
            //{
            //    query = filter.IsInherited.Value
            //        ? query.Where(g => g.ParentGoalId != null)
            //        : query.Where(g => g.ParentGoalId == null);
            //}

            //if (filter.IsRootGoal == true)
            //{
            //    query = query.Where(g => g.ParentGoalId == null);
            //}

            return query;
        }
    }
}