import connexion
import fileinput
import json
import sys

from flask import Flask, escape, request, make_response
from var_declaration import policy_instances, policy_types, policy_status

app = connexion.App(__name__, specification_dir='.')

@app.route('/policytypes/<string:policyTypeId>', methods=['PUT','DELETE'])
def policy_type(policyTypeId):
  if request.method == 'PUT':
    data = request.data.decode("utf-8")
    data = data.replace("'", "\"")
    data = json.loads(data)
    policy_types[policyTypeId] = data
    return ('The policy type was either created or updated for policy type id: ' + policyTypeId)
  elif request.method == 'DELETE':
    if policyTypeId in policy_types.keys():
      policy_types.pop(policyTypeId)
      return make_response("policy type successfully deleted for policy type id: " + policyTypeId, 200)
    else:
      return make_response("No policy type defined for the specified id", 404)

@app.route('/', methods=['GET'])
def test():
  if "STD_QoSNud_0.1.0" in policy_types.keys():
    return("Something fishy!", 200)
  else:
    return(str(list(policy_types.keys())), 200)

@app.route('/deleteinstances', methods=['DELETE'])
def delete_instances():
  global policy_instances
  global policy_status
  policy_instances.clear()
  policy_status.clear()
  return("All policy instances deleted", 200)

@app.route('/deletetypes', methods=['DELETE'])
def delete_types():
  global policy_types
  policy_types.clear()
  return("All policy types deleted", 200)

@app.route('/<string:policyId>/<string:enforceStatus>', methods=['PUT'])
def set_status(policyId, enforceStatus):
  if policyId in policy_instances.keys():
    if enforceStatus in ["UNDEFINED", "ENFORCED", "NOT_ENFORCED"]:
      policy_status.pop(policyId)
      ps = {}
      ps["policyId"] = policyId
      ps["enforceStatus"] = enforceStatus
      policy_status[policyId] = ps
      return("Status updated for policy: " + policyId, 200)
    else:
      return("enforceStatus should be one of \"UNDEFINED\", \"ENFORCED\" or \"NOT_ENFORCED\"", 400)
  else:
    return("The policy id does not correspond to any existing policy instance", 400)

@app.route('/<string:policyId>/<string:enforceStatus>/<string:enforceReason>', methods=['PUT'])
def set_status_with_reason(policyId, enforceStatus, enforceReason):
  if policyId in policy_instances.keys():
    if enforceStatus == "NOT_ENFORCED":
      if enforceReason in ["100", "200", "300", "800"]:
        policy_status.pop(policyId)
        ps = {}
        ps["policyId"] = policyId
        ps["enforceStatus"] = enforceStatus
        ps["enforceReason"] = enforceReason
        policy_status[policyId] = ps
        return("Status updated for policy: " + policyId, 200)
      else:
        return("enforceReason should be one of \"100\", \"200\", \"300\" or \"800\"", 400)
    else:
      return("A status provided together with an enforcement reason should be \"NOT_ENFORCED\"", 400)
  else:
    return("The policy id does not correspond to any existing policy instance", 404)


port_number = 8085
if len(sys.argv) >= 2:
  if isinstance(sys.argv[1], int):
    port_number = sys.argv[1]

app.add_api('a1-openapi.yaml')
app.run(port=port_number)