#! /usr/bin/python3
# Copyright (C) 2018 Merspieler, merspieler _at_ airmail.cc
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

import sys
import os
import re
from math import ceil
import time

argc = len(sys.argv)
i = 1
first = 1
create_zip = False
man_threads = ""
project = ""
while i < argc:
	if sys.argv[i] == "-t" or sys.argv[i] == "--threads":
		i += 1
		man_threads = "-t sys.argv[i]"
	elif sys.argv[i] == "-z" or sys.argv[i] == "--zip":
		create_zip = True
	elif sys.argv[i] == "-h" or sys.argv[i] == "--help":
		print("usage: build <project> [OPTIONS]")
		print("Builds the tiles with osm2city")
		print("")
		print("OPTIONS")
		print("  -h, --help      Shows this help and exit")
		print("  -t, --threads   Number of threads used for building")
		print("                  This will overwrite the value from the general-settings file")
		print("  -z, --zip       Create a ready to distribute zip file on success")
		sys.exit(0)
	else:
		if first == 1:
			first = 0
			project = sys.argv[i]
		else:
			print("Unknown option " + sys.argv[i])
			sys.exit(1)
	i += 1

if project == "":
	print("No project was given. See build -h for details")
	sys.exit(1)

try:
	settings_file = open("projects/" + project + "/settings")
	bounds = settings_file.readline()
	settings_file.close()
except:
	print("Couldn't find the settings file for the given project.")
	print("Please check if the project exsists and contains the 'settings' file.")
	print("To create a new project run './create-project'")
	sys.exit(1)

match = re.match("^bounds=\*?(-?[0-9]{1,3}\.[0-9]{0,4})_(-?[0-9]{1,2}\.[0-9]{0,4})_(-?[0-9]{1,3}\.[0-9]{0,4})_(-?[0-9]{1,2}\.[0-9]{0,4})$", bounds)
if match:
	west = match.group(1)
	south = match.group(2)
	east = match.group(3)
	north = match.group(4)
else:
	print("Failed to get bounds")
	sys.exit(1)

width = ceil(east - west)
height = ceil(north - south)
start_time = time.time()

for w in range(0, width):
	build_w = west + w
	build_e = build_w + 1
	if build_e > east:
		build_e = east

	if build_w < 0:
		build_w = "*" + str(build_w)

	for s in range(0, height):
		build_s = south + s
		build_n = build_s + 1
		if build_n > north:
			build_n = north

		os.system("./build_tile " + project + " " + man_threads + " -b " + str(build_w) + "_" + str(build_s) + "_" + str(build_e) + "_" + str(build_n))

# Get build time
end_time = time.time()
elapsed = end_time - start_time
seconds = elapsed % 60
elapsed = (elapsed - seconds) / 60
minutes = elapsed % 60
elapsed = (elapsed - minutes) / 60
hours = elapsed % 24
days = (elapsed - hours) / 24

time = str(hours) + " Hours, " + str(minutes) + " Minutes and " + str(seconds) + " Seconds"
if days > 0:
	time = str(days) + " Days, " + time

print("Building " + project + "took " + time)


if create_zip:
	print("Creating zip file...")
	os.system("zip -rq projects/" + project + "/" + project + ".zip projects/" + project + "/scenery/")