using System;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using FarmmapsApi.Models;
using FarmmapsApi.Services;
using Google.Apis.Upload;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json.Linq;
using static FarmmapsApiSamples.Constants;

namespace FarmmapsApiSamples
{
    public class NbsApp : IApp
    {
        private readonly ILogger<NbsApp> _logger;
        private readonly FarmmapsApiService _farmmapsApiService;
        private readonly NitrogenService _nitrogenService;

        public NbsApp(ILogger<NbsApp> logger, FarmmapsApiService farmmapsApiService,
           NitrogenService nitrogenService)
        {
            _logger = logger;
            _farmmapsApiService = farmmapsApiService;
            _nitrogenService = nitrogenService;

            farmmapsApiService.EventCallback += OnEvent;
        }

        private void OnEvent(EventMessage @event)
        {
            _logger.LogInformation(@event.EventType);
        }

        public async Task RunAsync()
        {
            try
            {
                _logger.LogInformation("NBS sample app started");

                await _farmmapsApiService.AuthenticateAsync();

                _logger.LogInformation("Authenticated client credentials");

                var roots = await _farmmapsApiService.GetCurrentUserRootsAsync();

                // upload data to Uploaded
                var uploadedRoot = roots.SingleOrDefault(r => r.Name == "Uploaded");
                if (uploadedRoot != null)
                {
                    await _farmmapsApiService.UploadFile(Path.Combine("Data", "Scan_1_20190605.zip"), uploadedRoot.Code,
                        progress =>
                        {
                            _logger.LogInformation($"Status: {progress.Status} - BytesSent: {progress.BytesSent}");
                            if (progress.Status == UploadStatus.Failed)
                                _logger.LogError($"Uploading failed {progress.Exception.Message}");
                        });

                    // need to transform shape data to geotiff

                    var myDriveRoot = roots.SingleOrDefault(r => r.Name == "My drive");
                    if (myDriveRoot != null)
                    {
                        var cropfieldItem = await GetOrCreateCropfieldItem(myDriveRoot.Code);

                        _logger.LogInformation($"Calculating targetN with targetYield: {60}");
                        var targetN = await _nitrogenService.CalculateTargetN(cropfieldItem, 60);
                        _logger.LogInformation($"TargetN: {targetN}");

                        _logger.LogInformation("Calculating nitrogen map");
//                    var nitrogenMapItem = CalculateNitrogenMap(cropfieldItem,, targetN);
                    }
                }
            }
            catch (Exception ex)
            {
                _logger.LogError(ex.Message);
            }
        }

        private async Task<Item> GetOrCreateCropfieldItem(string parentItemCode)
        {
            var cropfieldItems = await
                _farmmapsApiService.GetItemChildrenAsync(parentItemCode, CROPFIELD_ITEMTYPE);

            if (cropfieldItems.Count > 0)
                return cropfieldItems[0];

            var currentYear = new DateTime(DateTime.UtcNow.Year, 1, 1);
            var cropfieldItemRequest = new ItemRequest()
            {
                ParentCode = parentItemCode,
                ItemType = "vnd.farmmaps.itemtype.cropfield",
                Name = "Cropfield for VRA",
                DataDate = currentYear,
                DataEndDate = currentYear.AddYears(1),
                Data = JObject.FromObject(new
                    {startDate = currentYear, endDate = currentYear.AddMonths(3)}),
                Geometry = JObject.Parse(
                    @"{ ""type"": ""Polygon"", ""coordinates"": [ [ [ 3.40843828875524, 50.638966444680605 ], [ 3.408953272886064, 50.639197789621612 ], [ 3.409242951459603, 50.639469958681836 ], [ 3.409328782148028, 50.639612846807708 ], [ 3.409457528180712, 50.639789755314411 ], [ 3.409639918393741, 50.640014292074966 ], [ 3.409833037442765, 50.640211611372706 ], [ 3.410069071836049, 50.640395321698435 ], [ 3.410380208081761, 50.640572227259661 ], [ 3.410605513638958, 50.640715112034222 ], [ 3.411925160474145, 50.641177783561204 ], [ 3.411935889310142, 50.640728720085136 ], [ 3.412590348309737, 50.63948356709389 ], [ 3.413244807309242, 50.638224772339846 ], [ 3.413400375432099, 50.637901562841307 ], [ 3.413539850300779, 50.637449065809889 ], [ 3.413475477284437, 50.637418445552932 ], [ 3.40999396998362, 50.637449065810451 ], [ 3.409940325803365, 50.638102293212661 ], [ 3.409575545377398, 50.638483338338325 ], [ 3.409060561246574, 50.638707881340494 ], [ 3.40843828875524, 50.638966444680605 ] ] ] }")
            };

            return await _farmmapsApiService.CreateItemAsync(cropfieldItemRequest);
        }
    }
}