import pyotp
import decouple
import os

from os.path import join

from flask import Flask, request
from flask_restful import Resource, Api
from schemas import OTPSchema, CreateOTPSchema, DeleteOTPSchema, ListAccountSchema

from config import etcd_client
from helper import is_valid_otp, create_admin_if_dont_exists

app = Flask(__name__)
api = Api(app)
create_admin_if_dont_exists(etcd_client)


class Verify(Resource):
    @staticmethod
    def post():
        data = request.json
        if data:
            schema = OTPSchema(data)
            if schema.is_valid():
                return {"message": "Verified"}, 200
            else:
                return schema.get_errors(), 400
        else:
            return {"message": "No Data"}, 400


class Create(Resource):
    @staticmethod
    def post():
        data = request.json
        schema = CreateOTPSchema(data)
        if schema.is_valid():
            _key = join(decouple.config("BASE_PREFIX"), data["name"])

            if etcd_client.get(_key) is None:
                if not isinstance(data["realm"], list):
                    realms = [data["realm"]]
                else:
                    realms = data["realm"]
                _value = {"seed": pyotp.random_base32(), "realm": realms}
                etcd_client.put(_key, _value, value_in_json=True)
                return {
                    "message": "Account Created",
                    "credentials": {
                        "name": data["name"],
                        "realm": _value["realm"],
                        "seed": _value["seed"]
                    }
                }, 200
        else:
            return schema.get_errors(), 400


class Delete(Resource):
    @staticmethod
    def post():
        data = request.json

        schema = DeleteOTPSchema(data)
        if schema.is_valid():
            _key = join(decouple.config("BASE_PREFIX"), data["name"])
            etcd_client.client.delete(_key)

            return {"message": "Account Deleted"}
        else:
            return schema.get_errors(), 400


class List(Resource):
    @staticmethod
    def post():
        data = request.json

        schema = ListAccountSchema(data)
        if schema.is_valid():
            result = etcd_client.get_prefix(
                decouple.config("BASE_PREFIX"), value_in_json=True
            )
            r = {}
            for entry in result:
                _name = entry.key.split("/")[-1]
                r["{}".format(_name)] = {
                    "seed": entry.value["seed"],
                    "realm": entry.value["realm"],
                }
            return r
        else:
            return schema.get_errors(), 400


api.add_resource(Verify, "/verify/")
api.add_resource(Create, "/create/")
api.add_resource(Delete, "/delete/")
api.add_resource(List, "/list/")

if __name__ == "__main__":
    app.run(debug=True, host="::", port=decouple.config("PORT", int))