#!/usr/bin/env python

from requests.auth import HTTPDigestAuth

import copy
import threading
import json
import requests
import sys
import time
import urlparse

with open('creds.txt') as fp:
	ip, username, password = fp.readline().split()

def fetch_envoy_data(envoy_ip, path, username, password):
	url = urlparse.urlunsplit(('http', envoy_ip, path, '', ''))

	resp = requests.get(url, auth=HTTPDigestAuth(username, password))

	return json.loads(resp.text)

def myenvoy(x):
	while True:
		try:
			return fetch_envoy_data(ip, x, username, password)
		except ValueError:
			time.sleep(5)

loglock = threading.Lock()
def logdata(hdr, obj):
	with loglock:
		print '%s %.3f %s' % (hdr, time.time(), json.dumps(obj))
		sys.stdout.flush()

if False:
	data = myenvoy('/api/v1/production/inverters/')
	print(repr(data))
	import pprint
	pprint.pprint([ x[u'lastReportWatts'] for x in data ])
	print sum([ int(x[u'lastReportWatts']) for x in data ], 0)
	lrdates = [ x['lastReportDate'] for x in data ]
	lrdates.sort()
	pprint.pprint([ lrdates[x] - lrdates[x - 1] for x in xrange(1, len(lrdates)) ])

def shortprodcmp(a, b):
	if b is None or a is None:
		return cmp(a, b)

	a = copy.deepcopy(a)
	b = copy.deepcopy(b)

	del a['eim']['readingTime']
	del b['eim']['readingTime']

	return cmp(a, b)

def thread_production():
	global doexit

	lastfulllog = 0
	lastdata = None

	s = time.time()
	while not doexit:
		r = myenvoy('/production.json?details=1')

		# full, every 5 minutes
		if time.time() > lastfulllog + 5*60:
			logdata('production', r)
			lastfulllog = time.time()

		# remap by type
		tmap = { x['type']: x for x in r['production'] }

		# take what fields we want
		eim = tmap['eim']
		eimfields = [ 'readingTime', 'wNow', 'whLifetime', ]
		data = {
			'inverters': tmap['inverters'],
			'eim': { k: eim[k] for k in eimfields },
		}

		# log if it's different
		if shortprodcmp(data, lastdata) != 0:
			logdata('shortprod', data)

		lastdata = data

		s += 10
		e = time.time()
		if s > e:
			time.sleep(s - time.time())
		else:
			# catch up s to e:
			s += ((e - s) // 10) * 10

def thread_inventory():
	global doexit

	lastr = None
	lastlog = 0
	while not doexit:
		r = myenvoy('/inventory.json')

		# if it changes, or every 24hrs
		if lastr != r or time.time() > lastlog + 24*60*60:
			logdata('inventory', r)
			lastlog = time.time()

		lastr = r

		time.sleep(60*60)

def thread_panels():
	global doexit

	lastr = None
	while not doexit:
		r = myenvoy('/api/v1/production/inverters/')

		if lastr != r:
			logdata('panel', r)

		lastr = r

		#reps = [ x['lastReportDate'] for x in r ]
		#reps.sort()
		#print '\n'.join(time.ctime(x) for x in reps)

		try:
			lastrepdate = max(x['lastReportDate'] for x in r)

			waittotime = lastrepdate + 300 + 10
		except ValueError:
			waittotime = 0

		curtime = time.time()

		if waittotime < curtime:
			wait = 120	# 2 minutes
		else:
			wait = waittotime - curtime

		print 'debug waiting:', wait
		time.sleep(wait)

if __name__ == '__main__':
	doexit = False

	threadfuns = [ x for x in dir() if x.startswith('thread_') ]

	threadobjs = { x: threading.Thread(target=globals()[x]) for x in threadfuns }

	for i in threadobjs.itervalues():
		i.setDaemon(True)
		i.start()

	while True:
		time.sleep(120)

	time.sleep(3)
	sys.exit()