from functools import wraps
from flask import Flask
from flask import render_template, send_from_directory, request, Response, redirect, url_for
import json, time, subprocess
app = Flask(__name__)

def check_auth(username, password):
	admin_list = []
	with open('admin.json', 'r') as admin:
		admin_list = json.load(admin)
	for user in admin_list:
		if username == user['username']:
			return password == user['password']

def authenticate():
	return Response('Could not verify access level. Please retry', 401, {'WWW-Authenticate' :  'Basic realm="Login Required"'})

def requires_auth(f):
	@wraps(f)
	def decorated(*args, **kwargs):
		auth = request.authorization
		if not auth or not check_auth(auth.username, auth.password):
			return authenticate()
		return f(*args, **kwargs)
	return decorated

@app.route('/')
def index():
	return render_template('home.html')

@app.route('/help')
def help():
	return render_template('help.html')

@app.route('/status')
@requires_auth
def status():
	locked = False
	t = 0
	with open('locked_till.txt', 'rb') as f:
		txt = f.read()
		t = float(txt)
		locked = time.time() < t
	timestring = time.strftime('%Y-%m-%d %H:%M:%S %Z', time.localtime(t))
	return render_template('status.html', locked=locked, timestring=timestring)

@app.route('/lock-fridge/<duration>')
@requires_auth
def lock_fridge(duration):
	with open('locked_till.txt', 'wb') as f:
		f.write(str(time.time() + float(duration) * 3600))
	return '{"success":true}'

@app.route('/unlock-fridge')
@requires_auth
def unlock_fridge():
	with open('locked_till.txt', 'wb') as f:
		f.write('0')
	return redirect(url_for('status'))

@app.route('/open/<what>')
@requires_auth
def users(what):
	if what == "fridge":
		subprocess.call("/home/pi/ELAB-RFID-I2C/RPi/i2c_challenge 0x20", shell=True)
	elif what == "tools":
		subprocess.call("/home/pi/ELAB-RFID-I2C/RPi/i2c_challenge 0x30", shell=True)
	print('opened', what)
	return redirect(url_for('status'))

@app.route('/gethistory')
@requires_auth
def getHistory():
	return send_from_directory('.', 'history.json')

@app.route('/getcardinfo/<cardID>')
@requires_auth
def getCardInfo(cardID):
	return send_from_directory('cards', cardID + '.json')


@app.route('/addcard/<cardID>/<name>/<authCode>')
@requires_auth
def addCard(cardID, name, authCode):
	authCode = int(authCode)
	data = {}
	data["name"] = name
	if authCode == 0:
		data["fridge"] = False
		data["secretTools"] = False
	elif authCode == 1:
		data["fridge"] = True
		data["secretTools"] = False
	elif authCode == 2:
		data["fridge"] = False
		data["secretTools"] = True
	elif authCode == 3:
		data["fridge"] = True
		data["secretTools"] = True
	else:
		return '{"status" : "error_unknownAuthCode"}'

	with open('cards/' + cardID + '.json', 'w') as outfile:
		json.dump(data, outfile)

	history = []
	with open('history.json', 'r') as history_in:
		history = json.load(history_in)
	for event in history:
		if event["cardID"] == cardID:
			event["name"] = name
	with open('history.json', 'w') as history_out:
		json.dump(history, history_out)

	return '{"status": "ok"}'

def epochFormat(timestamp):
	timeObject = time.localtime(timestamp)
	timeString = str(timeObject.tm_year) + '/' + str(timeObject.tm_mon) + '/' + str(timeObject.tm_mday) + ' - '
	if timeObject.tm_hour < 10:
		timeString = timeString + '0'
	timeString = timeString + str(timeObject.tm_hour) + ":"
	if timeObject.tm_min < 10:
		timeString = timeString + '0'
	timeString = timeString + str(timeObject.tm_min) + ":"
	if timeObject.tm_sec < 10:
		timeString = timeString + '0'
	timeString = timeString + str(timeObject.tm_sec)

	return timeString