using FarmmapsApi.Models;
using FarmmapsApi.Services;
using FarmMapsBlight.Models;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using static FarmmapsApi.Extensions;
using static FarmmapsApiSamples.Constants;

namespace FarmMapsBlight
{
    public class BlightService
    {
        private readonly ILogger<BlightService> _logger;
        private readonly FarmmapsApiService _farmmapsApiService;
        private readonly GeneralService _generalService;

        public BlightService(ILogger<BlightService> logger, FarmmapsApiService farmmapsApiService,
            GeneralService generalService)
        {
            _logger = logger;
            _farmmapsApiService = farmmapsApiService;
            _generalService = generalService;
        }

        public async Task<Item> CreateAdvice(Item cropfieldItem, DateTime adviceDate, DateTime plantingDate, DateTime emergeDate)
        {
            var taskRequest = new TaskRequest()
            {
                TaskType = "vnd.farmmaps.task.blight"
            };

            taskRequest.attributes["d"] = adviceDate.ToUniversalTime().ToString("o");
            taskRequest.attributes["plantingDate"] = plantingDate.ToUniversalTime().ToString("o");
            taskRequest.attributes["emergeDate"] = emergeDate.ToUniversalTime().ToString("o");

            List<Spray> sprays = new List<Spray>();
            sprays.Add(new Spray() { fungicideCode = "FLEX", SprayTime = new DateTime(2020, 7, 1), dose = 0.6, isVRA = false });
            taskRequest.attributes["sprays"] = JsonConvert.SerializeObject(sprays);

            List<Irrigation> irrigations = new List<Irrigation>();
            irrigations.Add(new Irrigation() { startTime = new DateTime(2020, 7, 1, 2, 0, 0), endTime = new DateTime(2020, 7, 1, 14, 0, 0) });
            taskRequest.attributes["irrigations"] = JsonConvert.SerializeObject(irrigations);

            var taskCode = await _farmmapsApiService.QueueTaskAsync(cropfieldItem.Code, taskRequest);
            await PollTask(TimeSpan.FromSeconds(3), async (tokenSource) =>
            {
                var itemTaskStatus = await _farmmapsApiService.GetTaskStatusAsync(cropfieldItem.Code, taskCode);
                _logger.LogInformation($"Checking blight task status: { itemTaskStatus.State}");
                if (itemTaskStatus.IsFinished)
                    tokenSource.Cancel();
            });

            var itemTask = await _farmmapsApiService.GetTaskStatusAsync(cropfieldItem.Code, taskCode);
            if (itemTask.State == ItemTaskState.Error)
            {
                _logger.LogError($"Something went wrong with task execution: {itemTask.Message}");
                return null;
            }

            var itemName = $"Blight";
            var blightAdviceItem = await _generalService.FindChildItemAsync(cropfieldItem.Code,
                BLIGHT_ITEMTYPE, itemName);

            // incorrect filter task is finished after updating

            // i => i.Updated >= itemTask.Finished && i.Name.ToLower().Contains(itemName.ToLower())
            if (blightAdviceItem == null)
            {
                _logger.LogError("Could not find the blight item under cropfield");
                return null;
            }

            return blightAdviceItem;
        }
    }
}