from flask import Blueprint, render_template, url_for, flash, redirect, request, current_app
from chatBot.update.forms import LoginForm, UpdateForm
from flask_login import login_user, current_user, logout_user, login_required
import os
from chatBot import bcrypt, db
from chatBot.models import User
update = Blueprint('update', __name__)

@update.route("/register", methods=['GET', 'POST'])
def register():
    if current_user.is_authenticated:
        return redirect(url_for('update.upload'))
    form = LoginForm()

    if form.validate_on_submit():
        hashed_password = bcrypt.generate_password_hash(form.password.data).decode('utf-8')
        user = User(username = form.username.data, password = hashed_password)
        db.session.add(user)
        db.session.commit()
        flash(message = "Account created", category = "success")
        return redirect(url_for('update.login'))
    return render_template('login.html', title='login', form=form)

@update.route("/login", methods=['GET', 'POST'])
def login():
    if current_user.is_authenticated:
        return redirect(url_for('update.upload'))
    form = LoginForm()

    if form.validate_on_submit():
        user = User.query.filter_by(username=form.username.data).first()
        if user and form.username.data == 'TechTeam' and bcrypt.check_password_hash(pw_hash = user.password, password = form.password.data):
            login_user(user)
            next_page = request.args.get('next')
            flash(message = "Login successful", category = "success")
            return redirect(next_page) if next_page else redirect(url_for('update.upload'))
        flash(message = "Login unsuccessful", category = "danger")
    return render_template('login.html', title='Login', form=form)

@update.route("/upload", methods=['GET', 'POST'])
@login_required
def upload():
    form = UpdateForm()
    if form.validate_on_submit():
        if form.file.data:
            file = form.file.data
            fileCount = len(os.listdir(current_app.config['PDF_PATH']))
            file.save(current_app.config['PDF_PATH'] + str(fileCount + 1) + '.pdf')
            flash('Your file has been updated!', 'success')
    return render_template('update.html', title='Update', form=form)