using Force.Crc32;
using LANCommander.SDK.Models;
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
using LANCommander.SDK.Abstractions;
using LANCommander.SDK.Extensions;
using LANCommander.SDK.Factories;
using LANCommander.SDK.Providers;
using Microsoft.Extensions.Options;

namespace LANCommander.SDK.Services
{
    public class MediaClient(
        ApiRequestFactory apiRequestFactory,
        IConnectionClient connectionClient,
        ISettingsProvider settingsProvider) 
    {
        public async Task<Media> GetAsync(Guid mediaId)
        {
            return await apiRequestFactory
                .Create()
                .UseAuthenticationToken()
                .UseVersioning()
                .UseRoute($"/api/Media/{mediaId}")
                .GetAsync<Media>();
        }

        public async Task<FileInfo> DownloadAsync(Media media, string destination)
        {
            return await apiRequestFactory
                .Create()
                .UseAuthenticationToken()
                .UseVersioning()
                .UseRoute(GetDownloadPath(media))
                .DownloadAsync(destination);
        }

        public string GetAbsoluteUrl(Media media)
            => connectionClient.GetServerAddress().Join(GetDownloadPath(media)).ToString();

        public bool IsOfflineMode()
            => connectionClient.IsOfflineMode();

        public string GetLocalPath(Media media)
            => GetLocalPath(media.FileId, media.Crc32);

        public string GetLocalPath(Guid fileId, string crc32)
            => Path.Combine(settingsProvider.CurrentValue.Media.StoragePath, $"{fileId}-{crc32}");

        public IEnumerable<string> GetStaleLocalPaths(Media media)
            => Directory.EnumerateFiles(settingsProvider.CurrentValue.Media.StoragePath, $"{media.FileId}-*");

        public string GetDownloadPath(Media media)
            => $"/api/Media/{media.Id}/Download?fileId={media.FileId}";

        public string GetStreamPath(Media media)
            => $"/api/Media/{media.Id}/Stream";

        public string GetAbsoluteStreamUrl(Media media)
            => connectionClient.GetServerAddress().Join(GetStreamPath(media)).ToString();

        public string GetAbsoluteThumbnailUrl(Media media)
            => connectionClient.GetServerAddress().Join(GetThumbnailPath(media)).ToString();

        public string GetThumbnailPath(Media media)
            => $"/api/Media/{media.Id}/Thumbnail";

        public static async Task<string> CalculateChecksumAsync(string path)
        {
            uint crc = 0;

            using (FileStream fs = File.Open(path, FileMode.Open))
            {
                var buffer = new byte[4096];

                while (true)
                {
                    var count = await fs.ReadAsync(buffer, 0, buffer.Length);

                    if (count == 0)
                        break;

                    crc = Crc32Algorithm.Append(crc, buffer, 0, count);
                }
            }

            return crc.ToString("X");
        }
    }
}