using Azure.Core;
using Dapper;
using Diligent.WebAPI.Contracts.DTOs.Categories;
using Diligent.WebAPI.Contracts.DTOs.Document;
using Diligent.WebAPI.Contracts.DTOs.File;
using Diligent.WebAPI.Contracts.DTOs.Files;
using Diligent.WebAPI.Contracts.DTOs.Tags;
using Microsoft.Extensions.Configuration;
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static System.Net.Mime.MediaTypeNames;

namespace Diligent.WebAPI.Business.Services
{
    public class FileEntityService : IFileEntityService
    {
        private readonly ILogger<FileEntityService> _logger;
        private readonly DatabaseContext _context;
        private readonly IMapper _mapper;
        private readonly IConfiguration _configuration;

        public FileEntityService(DatabaseContext context, ILogger<FileEntityService> logger, IMapper mapper, IConfiguration configuration)
        {
            _context = context;
            _logger = logger;
            _mapper = mapper;
            _configuration = configuration;
        }

        public async Task<List<FileEntityResponse>> GetAllAsync() =>
            _mapper.Map<List<FileEntityResponse>>(await _context.Files.Include(x => x.Tags).ToListAsync());

        public async Task UploadPdfAsync(FileEntity file)
        {
            await _context.Files.AddAsync(file);

            await _context.SaveChangesAsync();
        }

        public async Task<IEnumerable<FileEntity>> GetAll()
        {
            return await _context.Files.ToListAsync();
        }

        public async Task<object> GetAllFiltered(FileFilter filters)
        {
            using var connection = new SqlConnection(_configuration.GetConnectionString("WebApi"));

            var files = await connection.QueryAsync<FileFilterReturnDto, TagResponse, CategoryResponse, FileFilterReturnDto>("SELECT Files.Id as FileId, stream_id, DocumentOrganizerDocStore.name as FileName, file_stream, file_type, cached_file_size, Tags.Id as TagId, Tags.Name as TagName, Categories.Id as CategoryId, Categories.Name as CategoryName FROM Files inner join FileEntityTag on Files.Id = FileEntityTag.FilesId inner join Tags on FileEntityTag.TagsId = Tags.Id inner join DocumentOrganizerDocStore on DocumentOrganizerDocStore.stream_id = Files.DocumentId inner join Categories on Files.CategoryId = Categories.Id;", (file, tag, category) =>
            {
                file.Tags.Add(tag);
                file.Category = category;
                return file;
            }, splitOn: "TagId, CategoryId");

            var filesList = files.ToList();

            var filtered = filesList
                .FilterFiles(filters);

            return new
            {
                Data = filtered.ApplyPagging(filters)
                    .Select(n => new { n.stream_id, n.FileName, n.cached_file_size, n.file_type }),
                Total = filtered.Count
            };
        }
    }
}