import math as m 
import urllib3

#def degree_to_coord(lat,long,zoom):
#    x=256/(m.pi*2)*2**zoom*(long+m.pi)
#    y=256/(m.pi*2)*2**zoom*(m.pi-m.log(m.tan(m.pi/4+lat/2)))
#    return(int(x//256),int(y//256))

def degree_to_coord(lat,long,zoom):
    (x,y) = degree_to_real_coord(lat,long,zoom)
    return(int(x//256),int(y//256))


def degree_to_real_coord(lat,long,zoom):
    x=256/(m.pi*2)*2**zoom*(long+m.pi)
    y=256/(m.pi*2)*2**zoom*(m.pi-m.log(m.tan(m.pi/4+lat/2)))
    return(x,y)

def degree_to_url(lat_deg,long_deg,zoom):
    (x,y)= degree_to_coord(m.radians(lat_deg),m.radians(long_deg),zoom)
    return(coord_to_url(x,y,zoom))

def coord_to_url(x,y,zoom):
    return(f"https://tile.openstreetmap.org/{zoom}/{x%(2**zoom)}/{y%(2**zoom)}.png")


def coord_to_download(x,y,zoom,filename):
    user_agent = {'user-agent': 'map_viewer'}
    http = urllib3.PoolManager(10,headers=user_agent)
    print(coord_to_url(x,y,zoom))
    url = http.urlopen('GET', coord_to_url(x,y,zoom))
    f = open(filename,"wb")
    f.write(url.data)
    f.close()


def degree_to_download(lat_deg,long_deg,zoom,filename):
    user_agent = {'user-agent': 'map_viewer'}
    http = urllib3.PoolManager(10,headers=user_agent)
    print(degree_to_url(lat_deg,long_deg,zoom))
    url = http.urlopen('GET', degree_to_url(lat_deg,long_deg,zoom))
    f = open(filename,"wb")
    f.write(url.data)
    f.close()