# !/usr/bin/python


from math import radians, cos, sin, asin, sqrt
import numpy as np
import subprocess
import sys
import time
import json
from time import strftime
import random

# haversine function to determine distance between two lat,long points


def haversine(lat1, lon1, lat2, lon2):
    R = 3959.87433  # earth radius in miles
    dLat = radians(lat2 - lat1)
    dLon = radians(lon2 - lon1)
    a = sin(dLat/2)**2 + cos(lat1)*cos(lat2)*sin(dLon/2)**2
    c = 2*asin(sqrt(a))
    return R*c

# get a random enough number


def getfloat():
    output = random.random()
    return output


def str_time_prop(start, end, format, prop):
    # get a time at a proportion of a range of two formatted times
    stime = start
    etime = end
    ptime = stime + prop * (etime - stime)

    return time.strftime(format, time.localtime(ptime))

# get random time in the future


def random_date(start, end, prop):
    return str_time_prop(start, end, '%m/%d/%Y %I:%M%p', prop)

# function to generate a lat,long coordinate within a range
# inspiration from this post:
# https://gis.stackexchange.com/questions/25877/generating-random-locations-nearby


def create_random_point(x0, y0, distance):
    # approximately 1609 meters in a mile
    # 5 miles = about 8045
    # 111300 = meters in a degree
    # 69 = miles in a degree
    r = distance / 111300
    r = r/2
    u = float(getfloat())
    v = float(getfloat())
    w = r * np.sqrt(u)
    t = 2 * np.pi * v
    x = w * np.cos(t)
    x1 = x / np.cos(y0)
    y = w * np.sin(t)
    print("u="+str(u))
    print("v="+str(v))
    return (x0+x1, y0+y)


init_start = time.time()
dtime = strftime("%m-%d-%Y %H:%M:%S")
newplot = ()

##### User defined variables #####

loghandle = './naut.log'
logfile = open(loghandle, "a")

# home_base (starting point), set to Warsaw center.
latitude1, longitude1 = 52.229832, 21.011734

#window_secs = 10800
window_secs = 1800

# how far to travel in meters from home base
meters_out = 4827

##### End User Defined variables #####

current_time = time.time()
window = current_time + window_secs

# for loop to get multiple points if desired (for future development - void/attractor calculations)
for i in range(1, 2):
    timex = float(getfloat())
    x, y = create_random_point(latitude1, longitude1, meters_out)
    future_time = random_date(current_time, window, timex)
    dest_lat = str(format(x, '.5f'))
    dest_long = str(format(y, '.5f'))
    orig_lat = str(latitude1)
    orig_long = str(longitude1)
    newplot = (x, y)
    origplot = (latitude1, longitude1)
    dist = haversine(origplot[0], origplot[1], newplot[0], newplot[1])
    dist = str(format(dist, '.2f'))
    print("Distance between points is ", dist)
    print("destination: "+dest_lat+" "+dest_long)
    print("future_time: "+future_time)
    logfile.write(dtime+" homebase_lat="+orig_lat+" homebase_long="+orig_long+" dest_lat=" +
                  dest_lat+" dest_long="+dest_long+" future_time="+future_time+" dist="+dist)

    msg_breaker = '~'
    msg_space = '`'
    msg_space2 = '```'
    # homage to the Matrix
    init1_msg = 'Wake up, Neo...'
    init_msg = 'The Matrix has you..'
    rabbit_msg1 = 'follow the'
    rabbit_msg2 = 'white rabbit...'

    logfile.write("\n")
    print(init1_msg)
    time.sleep(5)
    print(msg_breaker)
    print(init_msg)
    time.sleep(5)
    print(msg_breaker)
    print(rabbit_msg1)
    print(msg_breaker)
    print(msg_space2)
    print(rabbit_msg2)
    time.sleep(5)
    print(msg_breaker)
    print(" "+future_time)
    print(msg_breaker)
    print(" "+dest_lat)
    print(msg_space)
    print(dest_long)
    print("https://www.google.com/maps/search/?api=1&query="+dest_lat+","+dest_long+"  Time: "+future_time)