#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Copyright 2025, School of Engineering and Architecture of Fribourg
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from flask import request, Flask, url_for, render_template, redirect
import operators
import json


__author__ = 'Michael Mader'
__date__ = "2025-03-10"
__version__ = "0.5"
__email__ = "michael.maeder@hefr.ch"


"""
DevSecOps lab

A little web application that offers API calls for arithmetic operations
"""


# creation of the Flask application
app = Flask(__name__)

app.config['SECRET_KEY'] = 'the-best-secret-ever'   # super secure key against CSRF attacks

# global variable containing the name of the login user
global_data = {'username': 'no_user'}


# incrementation route
@app.route('/inc')
def plus_one():
    x = int(request.args.get('x', 1))
    return json.dumps({'x': operators.addition(x, 1)})

# addition route, the parameters will be passed with 'x' and 'y'
@app.route('/add')
def plus_y():
    x = int(request.args.get('x', 1))
    y = int(request.args.get('y', 1))
    return json.dumps({'result': operators.addition(x, y)})


# multiplication route, the parameters will be passed with 'x' and 'y'
@app.route('/mul')
def multiply_y():
    x = int(request.args.get('x', 1))
    y = int(request.args.get('y', 1))
    return json.dumps({'result': operators.multiplication(x, y)})


# division route, the parameters will be passed with 'x' and 'y'
@app.route('/div')
def division_y():
    x = int(request.args.get('x', 1))
    y = int(request.args.get('y', 1))
    return json.dumps({'result': operators.division(x, y)})


# help route, giving some information about the API
@app.route('/help')
def unused():
    return "Super calculator API"


# default route, just showing the main page
@app.route('/')
@app.route('/index')
def index():
    return render_template('index.html', title='Home', app_data=global_data, )


# login route, the given username will be used to welcome the user
@app.route('/login', methods=['GET', 'POST'])
def login():
    # handle the POST request
    if request.method == 'POST':
        username = request.form["username"]
        print(f"got: {username}")
        global_data['username'] = request.form.get('username')
        return redirect(url_for('index'))
    # otherwise handle the GET request
    return render_template('login.html', title='Sign In',)