#pragma once

#include "standardglobe_global.h"

#define PI 3.14159265358979323846
#define deg2a(v) v / 180.0 * PI
#define rad2d(v) v / PI * 180.0

class QVector3D;

/// <summary>
/// 经纬度坐标
/// </summary>
struct LonLatPos {
	double _lon_deg = 0;
	double _lat_deg = 0;
};

/// <summary>
/// 经纬高坐标系坐标
/// </summary>
struct STANDARDGLOBE_EXPORT LonLatAlt {
	double _lon_deg = 0;
	double _lat_deg = 0;
	double _alt_m = 0;

	LonLatAlt(double lon = 0, double lat = 0, double alt = 0);
	LonLatAlt(const LonLatPos& plain_pos);

	LonLatPos toLonLatPos() const;
};

/// <summary>
/// 地心坐标系
/// </summary>
struct ECEFv3d {
	double _x_pos = 0;// 指向0°经度圈与纬度0°交点
	double _y_pos = 0;
	double _z_pos = 0;
	QVector3D getVec3() const;
	static ECEFv3d fromVec3(const QVector3D& p);
};

/// <summary>
/// 东天北坐标系
/// </summary>
struct ENUv3d {
	double _e_pos = 0;
	double _n_pos = 0;
	double _t_pos = 0;
};

/// <summary>
/// 极坐标
/// </summary>
struct PolarPos {
	double _dist_m = 0;
	double _azimuth_deg = 0;
	double _pitch_deg = 0;
};

/// <summary>
/// 标准球体坐标转换工具
/// </summary>
class STANDARDGLOBE_EXPORT StandardGlobe
{
private:
	/// <summary>
	/// 标准正球体星球直径
	/// </summary>
	static double _radius_m;

public:
	StandardGlobe();

	static ECEFv3d llaToEcef(const LonLatAlt& v);
	static LonLatAlt ecefToLLA(const ECEFv3d& v);
	/// <summary>
	/// 根据LLA坐标获取两点之间的大地线长度和b->t初始方位角，warning：本计算忽视LLA的高度值
	/// </summary>
	/// <param name="base"></param>
	/// <param name="target"></param>
	/// <param name="dist"></param>
	/// <param name="azi"></param>
	static void getDistanceWithLLA(const LonLatAlt& base, const LonLatAlt& target, double& dist, double& azi);
	/// <summary>
	/// 根据两点之间的大地线长度和b->t初始方位角，计算目标LLA定位坐标
	/// </summary>
	/// <param name="base"></param>
	/// <param name="dist"></param>
	/// <param name="azi"></param>
	/// <param name="target"></param>
	static void getLLAWithDistance(const LonLatAlt& base, double dist, double azi, LonLatAlt& target);
	/// <summary>
	/// 通过LLA坐标，获取目标极坐标
	/// </summary>
	/// <param name="base"></param>
	/// <param name="target"></param>
	/// <returns></returns>
	static PolarPos getPolarWithLLA(const LonLatAlt& base, const LonLatAlt& target);
	/// <summary>
	/// 通过极坐标，获取目标LLA坐标
	/// </summary>
	/// <param name="base"></param>
	/// <param name="target"></param>
	/// <returns></returns>
	static LonLatAlt getLLAWithPolar(const LonLatAlt& base, const PolarPos& target);
};