from flask import Flask, render_template, session, redirect, flash, url_for
from flask_bootstrap import Bootstrap
from flask_moment import Moment
from datetime import datetime
from flask_migrate import Migrate
from NameForm import NameForm
from flask_sqlalchemy import SQLAlchemy
import os

basedir = os.path.abspath(os.path.dirname(__file__))
print('sqlite:///' + os.path.join(basedir, 'data.sqlite'))
app = Flask(__name__)

app.config['SECRET_KEY'] = 'hard to guess string'
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + os.path.join(basedir, 'data.sqlite')
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False


moment = Moment(app)
bootstrap = Bootstrap(app)
db = SQLAlchemy(app)
migrate = Migrate(app, db)


class Role(db.Model):
    __tablename__ = 'roles'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(64), unique=True)
    users = db.relationship('User', backref='role', lazy='dynamic')

    def __repr__(self):
        return '<Role %r>' % self.name


class User(db.Model):
    __tablename__ = 'users'
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(64), unique=True, index=True)
    role_id = db.Column(db.Integer, db.ForeignKey('roles.id'))

    def __repr__(self):
        return '<User %r>' % self.username


@app.shell_context_processor
def make_shell_context():
    return dict(db=db, User=User, Role=Role)

@app.route('/', methods=['GET', 'POST'])
def index():
    form = NameForm()

    if form.validate_on_submit():
        user = User.query.filter_by(username=form.name.data).first()
        print('user', user)
        if user is None:
            print('new user')
            user = User(username=form.name.data)
            db.session.add(user)
            db.session.commit()
            session['known'] = False
        else:
            session['known'] = True

        session['name'] = form.name.data
        form.name.data = '' 
        return redirect(url_for('index'))   

    return render_template("index.html",
     current_time = datetime.utcnow(), 
     form=form, 
     name = session.get('name'),
     known = session.get('known', False))

@app.route('/logout')
def logout():
   # remove the username from the session if it is there
   session.pop('name', None)
   session.pop('known', False)
   
   return redirect(url_for('index'))

@app.route('/user/<name>')
def user(name):
    return render_template("user.html", name=name)

@app.errorhandler(404)
def page_not_found(e):
    return render_template("404.html"), 404

@app.errorhandler(500)
def internal_server_error(e):
    return render_template("500.html"), 500
