#!/usr/bin/env python3.6
from flask import Flask
from flask import render_template, url_for, send_from_directory, redirect, request, send_file
from flask_login import login_user, login_required, current_user, LoginManager, UserMixin, logout_user
from flask_sqlalchemy import SQLAlchemy
from werkzeug.security import generate_password_hash, check_password_hash
import hashlib
import time

import dualisauth
import requesthelpers
from fetchRAPLA import *
from get_mysql import get_mysql
from parseICAL import getWeek


def create():
    app = Flask(__name__)
    dbpw = get_mysql()[1]
    dbun = get_mysql()[0]

    app.config['SECRET_KEY'] = 'SECRET_KEY_GOES_HERE'
    app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://' + dbun + ':' + dbpw + '@localhost/paulmrtn_DUALHUB'
    db.init_app(app)

    login_manager = LoginManager()
    login_manager.init_app(app)
    login_manager.login_view = "login"

    @login_manager.user_loader
    def load_user(uid: int):
        return User.query.filter_by(id=uid).first()

    return app


db = SQLAlchemy()
app = create()


class User(UserMixin, db.Model):
    id = db.Column(db.Integer, primary_key=True)
    email = db.Column(db.String(255), unique=True)
    password = db.Column(db.String(255))
    name = db.Column(db.String(255))
    kurs = db.Column(db.String(15))


class Dualis(db.Model):
    token = db.Column(db.String(255), unique=True)
    uid = db.Column(db.Integer, primary_key=True)
    token_created = db.Column(db.Integer)
    result_lists = db.Column(db.String(255))
    cookie = db.Column(db.String(255))


@app.route("/")
def index():
    return redirect(url_for("login"))


@app.route("/welcome")
@login_required
def welcome():
    kurs = current_user.kurs
    name = current_user.name
    return render_template('index.html', headermessage='DualHub', message="Hallo, "
                                                                          + name + " (" + kurs + ")")


@app.route("/backendpoc/set-up")
@login_required
def getKurs():
    d = Dualis.query.filter_by(uid=current_user.id).first()
    if d:
        e = False
        if not current_user.kurs:
            kurs = dualisauth.getKurs(d.token, d.cookie)
            if kurs != 0:
                current_user.kurs = kurs
                db.session.commit()
            else:
                e = True
        else:
            kurs = current_user.kurs
            current_user.kurs = kurs
            db.session.commit()
    else:
        e = True
        kurs = ""
    return render_template('kurs.html', detected=(kurs, e))



@app.route("/backendpoc/error<int:ecode>")
def error(ecode):
    if ecode == 900:
        msg = "Ungültige RAPLA-URL! Sicher, dass der Link zum DHBW-Rapla führt?"
    elif ecode == 899:
        msg = "Der Kalender wurde nicht gefunden! Sicher, dass der Link korrekt ist?"
    else:
        msg = "Unbekannter Fehler!"
    return render_template('index.html', message=msg, headermessage="DualHub")


@app.route("/backendpoc/rapla")
@login_required
def chooseRaplas():
    r = getRaplas()
    return render_template("rapla.html", raplas=r)


@login_required
@app.route("/backendpoc/rapla", methods=["POST"])
def getRapla():
    file = str(request.form.get("file"))
    url = str(request.form.get("url"))
    if file == url == "None":
        return redirect(url_for("chooseRaplas"))
    if file != "None":
        User.query.filter_by(id=current_user.id).first().kurs = file[5:-5]
        db.session.commit()
        #return send_file("calendars/" + file)
    elif url != "None":
        file = getNewRapla(url)
        if type(file) is not int:
            User.query.filter_by(id=current_user.id).first().kurs = file[5:-5]
            db.session.commit()
            #return send_file("calendars/" + file)
        else:
            return redirect(url_for("error", ecode=file + 900))
    return redirect(url_for("welcome"))

@login_required
@app.route("/backendpoc/plan", methods=["GET"])
def displayRapla():
    samstag = request.args.get("samstag")
    if not samstag:
        samstag = False
    events = getWeek("today", "rapla"+current_user.kurs+".ical", samstag)
    return render_template("plan.html", events=events[0], eventdays=events[1])


@app.route("/backendpoc/log-in")
def login(code: int = None):
    if code:
        print(code)
    return render_template("login.html")


@app.route("/backendpoc/log-in", methods=["POST"])
def login_post():
    email = request.form.get("email")
    password = request.form.get("password")
    n = request.args.get("next")
    if n:
        success = redirect(n)
    else:
        success = redirect(url_for("getKurs"))

    user = User.query.filter_by(email=email).first()

    if user:
        dualis = Dualis.query.filter_by(uid=user.id).first()
        if check_password_hash(user.password, password):
            if not dualis.token or not dualisauth.checkLifetime(dualis.token_created):
                new_token = dualisauth.checkUser(email, password)
                dualis.token = new_token[0]
                dualis.cookie = requesthelpers.getCookie(new_token[1].cookies)
                dualis.token_created = time.time()
                db.session.commit()
        else:
            t = dualisauth.checkUser(email, password)
            if t[0] == -2:
                return redirect(url_for("login", code=-2))
            else:
                user.password = generate_password_hash(password, method="pbkdf2:sha256")
                dualis.token = t[0]
                dualis.cookie = requesthelpers.getCookie(t[1].cookies)
                dualis.token_created = time.time()
                db.session.commit()
        login_user(user)
        if user.kurs:
            success = redirect(url_for("welcome"))
        return success

    t = dualisauth.checkUser(email, password)
    if t[0] == -2:
        return redirect(url_for("login", code=-2))

    hashid = int(hashlib.sha1(email.encode("utf-8")).hexdigest(), 16) % (10 ** 8)
    hashpw = generate_password_hash(password, method="pbkdf2:sha256")
    pname = email.find(".") + 1
    ename = min(email[pname:].find("."), email[pname:].find("@"))
    name = email[pname:pname + ename].capitalize()

    new_user = User(email=email, password=hashpw, name=name, id=hashid)
    db.session.add(new_user)

    cookie = requesthelpers.getCookie(t[1].cookies)

    new_dualis = Dualis(uid=hashid, token=t[0], token_created=int(time.time()), cookie=cookie)

    db.session.add(new_dualis)
    db.session.commit()
    login_user(new_user)
    return success


@app.route("/backendpoc/log-out")
def logout():
    dualis = Dualis.query.filter_by(uid=current_user.id).first()
    dualisauth.logOut(dualis.token, dualis.cookie)
    dualis.cookie = None
    dualis.token = None
    db.session.commit()
    logout_user()
    return redirect(url_for("login", code=1))


if __name__ == "__main__":
    app.run(host='0.0.0.0', port=2024, debug=True)