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# This is based on:
#
# ystockquote : Python module - retrieve stock quote data from Yahoo Finance
#
# Copyright (c) 2007,2008,2013 Corey Goldberg (cgoldberg@gmail.com)
#
# license: GNU LGPL
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# Requires: Tested under Python 3.4


import time, datetime
from urllib.request import Request, urlopen
from urllib.parse import urlencode

symbol = "^HSI"
basedatafile = '/home/john/zRamdisk/SierraChart/Data/HSIbase.dly'
datafile = '/home/john/zRamdisk/SierraChart/Data/HSI.dly'
startdate = '2007-06-01'
enddate = '2014-12-31'
seconds_until_repeat = 300

def _request(symbol, stat):
url = 'http://finance.yahoo.com/d/quotes.csv?s=%s&f=%s' % (symbol, stat)
req = Request(url)
resp = urlopen(req)
content = resp.read().decode().strip()
return content

def setup_base():

def get_data(start_date, end_date):
"""
Get historical prices for the given ticker symbol.
Date format is 'YYYY-MM-DD'
"""
params = urlencode({
's': symbol,
'a': int(start_date[5:7]) - 1,
'b': int(start_date[8:10]),
'c': int(start_date[0:4]),
'd': int(end_date[5:7]) - 1,
'e': int(end_date[8:10]),
'f': int(end_date[0:4]),
'g': 'd',
'ignore': '.csv',
})
url = 'http://ichart.yahoo.com/table.csv?%s' % params
req = Request(url)
resp = urlopen(req)
content = str(resp.read().decode('utf-8').strip())
daily_data = content.splitlines()
hist_data = []
for day in daily_data[len(daily_data):0:-1]:
dd = day.split(',')
hist_data.append([dd[0], dd[1], dd[2], dd[3], dd[4], dd[5]])
return hist_data

with open(basedatafile, 'w') as f:
ll = get_data(startdate, enddate)
for l in ll:
f.writelines(", ".join(l) +"\n")

def update_day():
with open(datafile, 'w') as f:
with open(basedatafile, 'r') as rf:
for l in rf:
f.writelines(l)
t = _request(symbol, 'd1l1om').split(',')
y = (datetime.date(int(l[0:4]), int(l[5:7]), int(l[8:10])) + datetime.timedelta(days=1)).isoformat()
f.writelines(y + ', ' + t[2] + ', ' + t[3].split('"')[1].split()[2] + ', ' + \
t[3].split('"')[1].split()[0] + ', '+t[1] + ', 0')


setup_base()
while "lifeonearth":
update_day()
time.sleep(seconds_until_repeat)

print("fell out the bottom")