from app import app, db
from app.models import User
from datetime import datetime
from werkzeug.urls import url_parse
from app.forms import LoginForm, RegistrationForm, EditProfileForm
from flask import flash, \
    redirect, \
    render_template, \
    url_for, \
    request
from flask_login import current_user, \
    login_user, \
    logout_user, \
    login_required


@app.route('/')
@app.route('/index')
@login_required
def index():
    posts = [
        {
            'author': {'username': 'John'},
            'body': 'Beautiful day in Portland'
        },
        {
            'author': {'username': 'Susan'},
            'body': 'The avengers movie was so cool'
        }
    ]

    return render_template('index.html', title='Home', posts=posts)

@app.route('/login', methods=['GET', 'POST'])
def login():
    # Dealing with strange case of the user already logged in
    # but being able to access login page.
    # current_user is a variable from Flask-Login that represents
    # the client of the request.
    
    print(current_user)
    if current_user.is_authenticated:
        return redirect(url_for('index'))

    form = LoginForm()
    if form.validate_on_submit():
        user = User.query.filter_by(username=form.username.data).first()
        if user is None or not user.check_password(form.password.data):
            flash('Invalid username or password')
            return redirect(url_for('login'))
        # login_user from Flask-Login and registers the current_user variable
        login_user(user, remember=form.remember_me.data)

        next_page = request.args.get('next')
        # url_parse.netloc determines if the path is relative to the domain
        # or absolute. If the latter, it would redirect to an external site
        # and could be dangerous. So, it redirects to the home page
        if not next_page or url_parse(next_page).netloc != '':
            next_page = url_for('index')

        return redirect(next_page)
    return render_template('login.html', title='Sign In', form=form)

@app.route('/logout')
def logout():
    logout_user()
    return redirect(url_for('index'))

@app.route('/register', methods=['GET', 'POST'])
def register():
    if current_user.is_authenticated:
        return redirect(url_for('index'))

    form = RegistrationForm()
    if form.validate_on_submit():
        user = User(username=form.username.data, email=form.email.data)
        user.set_password(form.password.data)
        db.session.add(user)
        db.session.commit()
        flash('Congratulations, you are now a registered user!')
        return redirect(url_for('login'))
    return render_template('register.html', title='Register', form=form)


@app.route('/user/<username>')
@login_required
def user(username):
    user = User.query.filter_by(username=username).first_or_404()
    posts = [
        {'author': user, 'body': 'Test post #1'},
        {'author': user, 'body': 'Test post #2'}
    ]
    return render_template('user.html', user=user, posts=posts)

@app.before_request
def before_request():
    if current_user.is_authenticated:
        current_user.last_seen = datetime.utcnow()
        db.session.commit()

@app.route('/edit_profile', methods=['GET', 'POST'])
@login_required
def edit_profile():
    form = EditProfileForm(current_user.username)
    if form.validate_on_submit():
        current_user.username = form.username.data
        current_user.about_me = form.about_me.data
        db.session.commit()
        flash('Your changes have been saved.')
        return redirect(url_for('edit_profile'))
    elif request.method == 'GET':
        form.username.data = current_user.username
        form.about_me.data = current_user.about_me
    return render_template('edit_profile.html', title='Edit Profile',
                           form=form)