# Copyright (c) 2020 Andika Wasisto
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

from flask import Flask, request, Response
from flask_sockets import Sockets
from gevent import pywsgi
from geventwebsocket.handler import WebSocketHandler

app = Flask(__name__)
sockets = Sockets(app)

from quanttp.data.qng_wrapper import QngWrapper
qng_wrapper = QngWrapper()

# from quanttp.data.qng_wrapper_mock import QngWrapperMock
# qng_wrapper = QngWrapperMock()


@app.route('/api/randint32')
def api_randint32():
    return Response(str(qng_wrapper.randint32()), content_type='text/plain')


@app.route('/api/randuniform')
def api_randuniform():
    return Response(str(qng_wrapper.randuniform()), content_type='text/plain')


@app.route('/api/randnormal')
def api_randnormal():
    return Response(str(qng_wrapper.randnormal()), content_type='text/plain')


@app.route('/api/randbytes')
def api_randbytes():
    try:
        length = int(request.args.get('length'))
        return Response(qng_wrapper.randbytes(length), content_type='application/octet-stream')
    except ValueError as e:
        return Response(str(e), status=400, content_type='text/plain')


@app.route('/api/reset')
def api_reset():
    qng_wrapper.reset()
    return Response('OK', content_type='text/plain')


@sockets.route('/ws')
def ws(websocket):
    while not websocket.closed:
        try:
            message = websocket.receive().strip().lower()
            split_message = message.split(' ')
            if split_message[0] == 'randint32':
                websocket.send(str(qng_wrapper.randint32()))
            elif split_message[0] == 'randuniform':
                websocket.send(str(qng_wrapper.randuniform()))
            elif split_message[0] == 'randnormal':
                websocket.send(str(qng_wrapper.randnormal()))
            elif split_message[0] == 'randbytes':
                websocket.send(qng_wrapper.randbytes(int(split_message[1])))
            elif split_message[0] == 'reset':
                qng_wrapper.reset()
                websocket.send('OK')
        except ValueError as e:
            websocket.close(code=1003, message=str(e))
        except Exception as e:
            websocket.close(code=1011, message=str(e))


@app.errorhandler(Exception)
def handle_exception(e):
    return Response(e.description, status=e.code, content_type='text/plain')


server = pywsgi.WSGIServer(('0.0.0.0', 62456), application=app, handler_class=WebSocketHandler)
server.serve_forever()