from flask import Flask, jsonify, request, render_template

app = Flask(__name__)

incomes = [
  { 'description': 'engineer', 'amount': 5000 },
  { 'description': 'cleaner', 'amount': 1000 }
]


@app.route('/', methods=["GET"])
def frontend():
  return render_template("index.html")

@app.route('/incomes', methods=['GET'])
def get_incomes():
  return jsonify(incomes)

@app.route('/incomes/average', methods=["GET"])
def avg():
  salaries = []
  for inc in incomes:
    salaries.append(int(inc["amount"]))
  return str(sum(salaries)/len(salaries))

@app.route('/income', methods=['POST'])
def add_income():
  if(request.headers.get('x-api-key') != "secretp4ssw0rd"):
    return '', 401
  incomes.append(request.get_json())
  return '', 204

@app.route('/income/<desc>', methods=['GET'])
def get_income(desc):
  try:
    return jsonify([inc for inc in incomes if inc['description'] == desc])
  except:
    return '', 404

@app.route('/income/<desc>', methods=['DELETE'])
def del_income(desc):
  if(request.headers.get('x-api-key') != "secretp4ssw0rd"):
    return '', 401
  for inc in incomes:
    if inc['description'] == desc:
      incomes.remove(inc)
  return '', 204


@app.after_request
def apply_caching(response):
  response.headers["Access-Control-Allow-Origin"] = "*"
  response.headers["Access-Control-Allow-Methods"] = "*"
  response.headers["Access-Control-Allow-Headers"] = "*"
  return response