using System.IO;
using System.Linq;
using System.Threading.Tasks;
using FarmmapsApi;
using FarmmapsApi.Services;
using Microsoft.Extensions.Logging;

namespace FarmmapsHaulmkilling
{
    public class HaulmkillingApplication : IApplication
    {
        private const string DownloadFolder = "Downloads";

        private readonly ILogger<HaulmkillingApplication> _logger;
        private readonly FarmmapsApiService _farmmapsApiService;
        private readonly HaulmkillingService _haulmkillingService;
        private readonly GeneralService _generalService;
        
        public HaulmkillingApplication(ILogger<HaulmkillingApplication> logger, FarmmapsApiService farmmapsApiService,
            GeneralService generalService, HaulmkillingService haulmkillingService)
        {
            _logger = logger;
            _farmmapsApiService = farmmapsApiService;
            _generalService = generalService;
            _haulmkillingService = haulmkillingService;
        }
        
        public async Task RunAsync()
        {
            if (!Directory.Exists(DownloadFolder))
                Directory.CreateDirectory(DownloadFolder);
            
            // !! this call is needed the first time an api is called with a fresh clientid and secret !!
            await _farmmapsApiService.GetCurrentUserCodeAsync();
            var roots = await _farmmapsApiService.GetCurrentUserRootsAsync();

            var myDrive = roots.SingleOrDefault(r => r.Name == "My drive");
            if (myDrive == null)
            {
                _logger.LogError("Could not find a needed root item");
                return;
            }

            var uploadedRoot = roots.SingleOrDefault(r => r.Name == "Uploaded");
            if (uploadedRoot == null)
            {
                _logger.LogError("Could not find a needed root item");
                return;
            }

            var agents = await _haulmkillingService.GetHaulmkillingAgents();
            if (agents == null)
            {
                _logger.LogError("No valid agents found for haulmkilling");
                return;
            }

            // save cropfield item and check if already exists and created (this to not have to run satellite everytime)
            _logger.LogInformation("Creating cropfield");
            var cropfieldItem = await _generalService.CreateCropfieldItemAsync(myDrive.Code, "Cropfield VRA Haulmkilling", 2020, 
                @"{""type"":""Polygon"",""coordinates"":[[[4.617786844284247,52.22533706956424],[4.618642601314543,52.225938364585989],[4.6192153806397,52.22563988897754],[4.619192414656403,52.2256242822442],[4.620306732153958,52.225031745661528],[4.620542019225217,52.22519855319158],[4.621157509147853,52.22487436515405],[4.623387917230182,52.22367660757213],[4.624563444939009,52.22304740241544],[4.624562779355982,52.223046635247019],[4.624534908813479,52.22302596787506],[4.627873021330343,52.221240670658399],[4.627504935938338,52.220104419135129],[4.627324878706837,52.22020569669098],[4.627320696113512,52.22020660117888],[4.626707169518044,52.22053923770041],[4.624700376420229,52.221619047547488],[4.623471571183885,52.22227447969577],[4.623471511010673,52.22227500174403],[4.623468838689317,52.22228052566992],[4.617786844284247,52.22533706956424]]]}");

            // run satellite task on just added cropfield
            
            
            // find ndvi or wdvi satellite data geotiffs
        }
    }
}