using AsbCloudApp.Data;
using AsbCloudApp.Repositories;
using AsbCloudApp.Services;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace AsbCloudInfrastructure.Services.Trajectory
{

    public class TrajectoryVisualizationService : ITrajectoryVisualizationService
    {
        private readonly IPlannedTrajectoryRepository plannedRepository;
        private readonly IActualTrajectoryRepository factualRepository;

        public TrajectoryVisualizationService(IPlannedTrajectoryRepository plannedRepository, IActualTrajectoryRepository factualRepository)
        {
            this.plannedRepository = plannedRepository;
            this.factualRepository = factualRepository;
        }

        /// <summary>
        /// Получение плановой и фактической траектории по скважине
        /// </summary>
        /// <param name="idWell">ключ скважины</param>
        /// <param name="token"></param>
        /// <returns></returns>
        public async Task<PlanFactBase<IEnumerable<TrajectoryVisualizationDto>>> GetTrajectoryAsync(int idWell, CancellationToken token)
        {
            var result = new PlanFactBase<IEnumerable<TrajectoryVisualizationDto>>();

            var geoPlanCoordinates = await plannedRepository.GetTrajectoryAsync(idWell, token);
            var geoFactCoordinates = await factualRepository.GetTrajectoryAsync(idWell, token);

            result.Plan = GetTrajectoryVisualisation(geoPlanCoordinates);
            result.Fact = GetTrajectoryVisualisation(geoFactCoordinates);

            return result;
        }

        /// <summary>
        /// Формирует список координат для визуализации трактории 3D
        /// </summary>
        /// <param name="geoCoordinates"></param>
        /// <returns></returns>
        private List<TrajectoryVisualizationDto> GetTrajectoryVisualisation(TrajectoryDto[] geoCoordinates)
        {
            if(geoCoordinates.Length < 2)
                return new List<TrajectoryVisualizationDto>();

            var cartesianCoordinates = new List<TrajectoryVisualizationDto>(geoCoordinates.Length) {
                new (),
            };

            for (var i = 1; i < geoCoordinates.Length; i++)
            {
                var intervalGeoParams = geoCoordinates[i - 1];
                var deltaWellLength = geoCoordinates[i].WellboreDepth - intervalGeoParams.WellboreDepth;
                var projectionLengthToXYSurface = deltaWellLength * Math.Sin(intervalGeoParams.ZenithAngle * Math.PI / 180);

                var dz = deltaWellLength * Math.Cos(intervalGeoParams.ZenithAngle * Math.PI / 180);
                var dx = projectionLengthToXYSurface * Math.Sin(intervalGeoParams.AzimuthGeo * Math.PI / 180);
                var dy = projectionLengthToXYSurface * Math.Cos(intervalGeoParams.AzimuthGeo * Math.PI / 180);

                var preCoordinates = cartesianCoordinates[i - 1];
                var coordinates = new TrajectoryVisualizationDto
                {
                    Z = preCoordinates.Z + dz,
                    X = preCoordinates.X + dx,
                    Y = preCoordinates.Y + dy,
                };

                cartesianCoordinates.Add(coordinates);
            }

            return cartesianCoordinates;
        }
    }

}