package com.moral.service.impl;

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.commons.collections.MapUtils;
import org.springframework.stereotype.Service;

import com.moral.entity.Device;
import com.moral.entity.Point;
import com.moral.entity.Sensor;
import com.moral.mapper.HistoryHourlyMapper;
import com.moral.mapper.SensorMapper;
import com.moral.service.DeviceService;
import com.moral.service.HistoryHourlyService;
import javax.annotation.Resource;

@Service
public class HistoryHourlyServiceImpl implements HistoryHourlyService {
    @Resource
    private HistoryHourlyMapper historyHourlyMapper;

    @Resource
    private DeviceService deviceService;

    @Resource
    private SensorMapper sensorMapper;

    @Override
    public Map<String, Object> getPollutionSourceData(Map<String, Object> parameters) throws Exception {
        List<Sensor> sensors = sensorMapper.getSensorsByMac(parameters);
        List<String> sensorKeys = new ArrayList<>();
        for (Sensor sensor : sensors) {
            sensorKeys.add(sensor.getSensorKey());
        }
        parameters.put("sensorKeys", sensorKeys);
        return historyHourlyMapper.getPollutionSourceData(parameters);
    }

    @Override
    public Point getDirPoint(Map<String, Object> parameters) throws Exception {
        Map<String, Object> pollutionSourceData = getPollutionSourceData(parameters);
        String mac = parameters.get("mac").toString();
        Device device = deviceService.getDeviceByMac(mac, false);
        Point pointEnd = new Point();
        if (MapUtils.isNotEmpty(pollutionSourceData)) {
            if (pollutionSourceData.get("e18") != null && pollutionSourceData.get("e23") != null && pollutionSourceData.get("e6") != null) {
                double windSpeed = Double.valueOf(pollutionSourceData.get("e18").toString());
                double winDir = Double.valueOf(pollutionSourceData.get("e23").toString());
                double distance = windSpeed * 3600;
                double long1 = device.getLongitude();
                double lat1 = device.getLatitude();
                String[] result = calLocationByDistanceAndLocationAndDirection(winDir, long1, lat1, distance);
                pointEnd.setLng(Double.valueOf(result[0]));
                pointEnd.setLat(Double.valueOf(result[1]));
            }
        }
        return pointEnd;
    }


    /**
     * 根据一点的坐标与距离，以及方向，计算另外一点的位置
     *
     * @param angle     角度，从正北顺时针方向开始计算
     * @param startLong 起始点经度
     * @param startLat  起始点纬度
     * @param distance  距离，单位m
     * @return
     */
    private String[] calLocationByDistanceAndLocationAndDirection(double angle, double startLong, double startLat, double distance) {
        /** 地球半径 **/
        final double R = 6371e3;
        /** 180° **/
        final DecimalFormat df = new DecimalFormat("0.000000");
        String[] result = new String[2];
        //将距离转换成经度的计算公式
        double δ = distance / R;
        // 转换为radian，否则结果会不正确
        angle = Math.toRadians(angle);
        startLong = Math.toRadians(startLong);
        startLat = Math.toRadians(startLat);
        double lat = Math.asin(Math.sin(startLat) * Math.cos(δ) + Math.cos(startLat) * Math.sin(δ) * Math.cos(angle));
        double lng = startLong + Math.atan2(Math.sin(angle) * Math.sin(δ) * Math.cos(startLat), Math.cos(δ) - Math.sin(startLat) * Math.sin(lat));
        // 转为正常的10进制经纬度
        lng = Math.toDegrees(lng);
        lat = Math.toDegrees(lat);
        result[0] = df.format(lng);
        result[1] = df.format(lat);
        return result;
    }

}