#!/bin/env python
import os, sys, datetime, math, itertools
try:
	import requests
except:
	print 'the requests module is required'
	exit(1)

title='''
'''

kitty=[
[0,0,0,4,0,0,0,0,4,0,0,0],
[0,0,4,2,4,4,4,4,2,4,0,0],
[0,0,4,2,2,2,2,2,2,4,0,0],
[2,2,4,2,4,2,2,4,2,4,2,2],
[0,0,4,2,2,3,3,2,2,4,0,0],
[2,2,4,2,2,2,2,2,2,4,2,2],
[0,0,0,3,4,4,4,4,3,0,0,0]]

oneup=[
[0,0,4,4,4,4,4,4,4,0,0],
[0,4,2,2,1,1,1,2,2,4,0],
[4,3,2,2,1,1,1,2,2,3,4],
[4,3,3,4,4,4,4,4,3,3,4],
[0,4,4,1,4,1,4,1,4,4,0],
[0,0,4,1,1,1,1,1,4,0,0],
[0,0,0,4,4,4,4,4,0,0,0]]

twoup=[
[0,0,4,4,4,4,4,4,4,0,0,0,0,0,4,4,4,4,4,4,4,0,0],
[0,4,2,2,1,1,1,2,2,4,0,0,0,4,2,2,1,1,1,2,2,4,0],
[4,3,2,2,1,1,1,2,2,3,4,0,4,3,2,2,1,1,1,2,2,3,4],
[4,3,3,4,4,4,4,4,3,3,4,0,4,3,3,4,4,4,4,4,3,3,4],
[0,4,4,1,4,1,4,1,4,4,0,0,0,4,4,1,4,1,4,1,4,4,0],
[0,0,4,1,1,1,1,1,4,0,0,0,0,0,4,1,1,1,1,1,4,0,0],
[0,0,0,4,4,4,4,4,0,0,0,0,0,0,0,4,4,4,4,4,0,0,0]]

hello=[
[0,1,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,4],
[0,2,0,0,0,0,0,0,0,2,0,2,0,0,0,0,0,4],
[0,3,3,3,0,2,3,3,0,3,0,3,0,1,3,1,0,3],
[0,4,0,4,0,4,0,4,0,4,0,4,0,4,0,4,0,3],
[0,3,0,3,0,3,3,3,0,3,0,3,0,3,0,3,0,2],
[0,2,0,2,0,2,0,0,0,2,0,2,0,2,0,2,0,0],
[0,1,0,1,0,1,1,1,0,1,0,1,0,1,1,1,0,4]]

hackerschool=[
[4,4,4,4,4,4],
[4,3,3,3,3,4],
[4,1,3,3,1,4],
[4,3,3,3,3,4],
[4,4,4,4,4,4],
[0,0,4,4,0,0],
[4,4,4,4,4,4]]

octocat=[
[0,0,0,4,0,0,0,4,0],
[0,0,4,4,4,4,4,4,4],
[0,0,4,1,3,3,3,1,4],
[4,0,3,4,3,3,3,4,3],
[0,4,0,0,4,4,4,0,0],
[0,0,4,4,4,4,4,4,4],
[0,0,4,0,4,0,4,0,4]]

octocat2=[
[0,0,4,0,0,4,0],
[0,4,4,4,4,4,4],
[0,4,1,3,3,1,4],
[0,4,4,4,4,4,4],
[4,0,0,4,4,0,0],
[0,4,4,4,4,4,0],
[0,0,0,4,4,4,0]]

hireme=[
[1,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[3,3,3,0,2,0,3,3,3,0,2,3,3,0,0,3,3,0,3,0,0,2,3,3],
[4,0,4,0,4,0,4,0,0,0,4,0,4,0,0,4,0,4,0,4,0,4,0,4],
[3,0,3,0,3,0,3,0,0,0,3,3,3,0,0,3,0,3,0,3,0,3,3,3],
[2,0,2,0,2,0,2,0,0,0,2,0,0,0,0,2,0,2,0,2,0,2,0,0],
[1,0,1,0,1,0,1,0,0,0,1,1,1,0,0,1,0,1,0,1,0,1,1,1]]

images={
'kitty':kitty,
'oneup':oneup,
'twoup':twoup,
'hello':hello,
'hackerschool':hackerschool,
'octocat':octocat,
'octocat2':octocat2,
'hello':hello,
'hireme':hireme
}

def get_calendar(username):
	"""retrieves the github commit calendar data for a username"""
	BASEURL='https://github.com/'
	url = BASEURL + 'users/' + username + '/contributions_calendar_data'
	req = requests.get(url)
	return req.json()

def max_commits(input):
	"""finds the highest number of commits in one day"""
	output = set()
	for i, j in enumerate(input):
		output.add(input[i][1])
	output = list(output)
	output.sort()
	output.reverse()
	return output[0]

def multiplier(max_commits):
	"""calculates a multiplier to scale github colors to commit history"""
	m = max_commits/4.0
	m = math.ceil(m)
	m = int(m)
	return m

def get_start_date():
	'''returns a datetime object for the first sunday after one year ago today at 12:00 noon'''
	d = datetime.datetime.today()
	date = datetime.datetime(d.year-1, d.month, d.day, 12)
	weekday = datetime.datetime.weekday(date)
	while weekday < 6:
		print repr(date)
		date = date + datetime.timedelta(1)
		weekday = datetime.datetime.weekday(date)
	return date

def date_gen(start_date, offset=0):
	'''generator that returns the next date, requires a datetime object as input. The offset is in weeks'''
	start = offset * 7
	for i in itertools.count(start):
		yield start_date + datetime.timedelta(i)

def values_in_date_order(image, multiplier=1):
	height = 7
	width = len(image[0])
	for h in range(height):
		for w in range(width):
			yield image[h][w]*multiplier

def commit(content, commitdate):
	template = '''echo %s >> gitfiti\nGIT_AUTHOR_DATE=%s GIT_COMMITTER_DATE=%s git commit -a -m "gitfiti"\n''' 
	return template	% (content, commitdate.isoformat(), commitdate.isoformat())

def fake_it(image, start_date, username, repo, offset=0, multiplier=1):
	template = ('#!/bin/bash\n'
				'REPO=%s\n'
				'git init $"REPO"\n'
				'cd $"REPO"\n'
				'touch gitfiti\n'
				'git add gitfiti\n'
				'%s\n'
				'git remote add origin git@github.com:%s/$"REPO".git\n'
				'git pull\n'
				'git push -u origin master\n')
	strings = []
	for value, date in zip(values_in_date_order(image, multiplier), date_gen(start_date, offset)):
		for i in range(value):
			strings.append(commit(i, date))
	return template % (repo, "".join(strings), username)

def save(output, filename):
	"""Saves the list to a given filename"""
	f = open(filename, "w")
	f.write(output)
	f.close()

def main():
	print '''
          _ __  _____ __  _ 
   ____ _(_) /_/ __(_) /_(_)
  / __ `/ / __/ /_/ / __/ / 
 / /_/ / / /_/ __/ / /_/ /  
 \__, /_/\__/_/ /_/\__/_/   
/____/ 
'''
	print 'enter your github username:'
	username = raw_input(">")
	cal = get_calendar(username)
	m = multiplier(max_commits(cal))

	print 'enter name of the repo to be used by gitfiti:'
	repo = raw_input(">")
	
	print 'enter weeks to offset the image:'
	offset = raw_input(">")
	if offset == None: offset = 0
	else: offset = int(offset)

	print 'enter the image name to gitfiti'
	print 'images: ' + ", ".join(images.keys())
	image = raw_input(">")
	if image == None: image = images['kitty']
	else:
		try: image = images[image]
		except: image = images['kitty']

	output = fake_it(image, get_start_date(), username, repo, offset, m)
	save(output, 'gitfiti.sh')
	print 'gitfiti.sh saved. Create a new(!) repo at: https://github.com/new\
	run it from inside the repo you want to gitfiti'

if __name__=='__main__':
	main()