// Encoding: UTF-8
#include "calendar.h"
#include <cstdio>
#include <ctime>
#include <iomanip>

/*以下为"calendar.h规定之量*/
double day = 86400;
double delta = 1e-11;
Julian julian;
parameter p;

pair<double, double> getSunPos(time_t time) {
    double t = julian.getJulianKiloYear(time);

    pair<double, double> sun = p.sun_longitude(t);
    radToDMS("Sun longitude:\t\t", 0, 360, sun.first);
    radToDMS("Sun latitude:\t\t", -90, 90, sun.second);

    double alpha, delta;                          // 太阳赤经赤纬
    double lambda = sun.first, beta = sun.second; // 太阳黄经黄纬
    // 黄赤交角epsilon
    double epsilon = p.get_epsilon(t);
    radToDMS("Ecliptic Obliquity:\t\t", 0, 90, epsilon);

    delta =
        asin(sin(epsilon) * sin(lambda) * cos(beta) + cos(epsilon) * sin(beta));
    alpha = atan2(
        (cos(epsilon) * sin(lambda) * cos(beta) - sin(epsilon) * sin(beta)),
        (cos(lambda) * cos(beta)));
    radToDMS("Sun right ascension:\t\t", 0, 360, alpha);
    radToDMS("Sun declination:\t\t", -90, 90, delta);
    // 时角
    double H = p.getHourAngle(t, LONGITUDE, LATITUDE, alpha);
    double A, h; //方位角和高度角
    h = asin(sin(LATITUDE) * sin(delta) + cos(LATITUDE) * cos(delta) * cos(H));
    A = atan2(-cos(delta) * sin(H),
              cos(LATITUDE) * sin(delta) - sin(LATITUDE) * cos(delta) * cos(H));
    A += M_PI;
    // 转换为角度制输出
    radToDMS("Hour angle:\t\t", 0, 360, H);
    radToDMS("Azimuth:\t\t", 0, 360, A);
    radToDMS("Elevation:\t\t", -90, 90, h);
}

int main(int argc, char *argv[]) {
    Date date;
    if (argc != 2) {
        printf("Input the time you want to calculate in <YYYY-MM-DD,HH:MM:SS> "
               "format:\t\t");
        scanf("%d-%d-%d,%d:%d:%d", &date.tm_year, &date.tm_mon, &date.tm_mday,
              &date.tm_hour, &date.tm_min, &date.tm_sec);
    } else {
        sscanf(argv[1], "%d-%d-%d,%d:%d:%d", &date.tm_year, &date.tm_mon,
               &date.tm_mday, &date.tm_hour, &date.tm_min, &date.tm_sec);
    }
    date.tm_year -= 1900;
    date.tm_mon -= 1;
    date.tm_isdst = -1;

    time_t time = mktime(&date);
    getSunPos(time);
    return 0;
}