import os
import secrets
from PIL import Image
from flask import render_template, url_for, flash, redirect, request, abort
from Undersight import app, db, bcrypt, mail
from Undersight.forms import (RegistrationForm, LoginForm, UpdateAccountForm, CommentForm,)
from Undersight.models import User, Comment
from flask_login import login_user, current_user, logout_user, login_required
from flask_mail import Message


@app.route("/")
@app.route("/home")
def home():
    return render_template('home.html', title = 'home')


@app.route("/find_local_politicians")
def find_local_politicians():
    return render_template('find_local_politicians.html', title = 'Find Local Politicians')


@app.route("/log_in", methods=['GET', 'POST'])
def log_in():
    if current_user.is_authenticated:
        return redirect(url_for('home'))
    form = LoginForm()
    if form.validate_on_submit():
        user = User.query.filter_by(email=form.email.data).first()
        if user and bcrypt.check_password_hash(user.password, form.password.data):
            login_user(user, remember=form.remember.data)
            next_page = request.args.get('next')
            return redirect(next_page) if next_page else redirect(url_for('home'))
        else:
            flash('Login Unsuccessful. Please check email and password', 'danger')
    return render_template('log_in.html', title = 'Log In', form=form)


@app.route("/log_out")
def logout():
    logout_user()
    return redirect(url_for('home'))


@app.route("/sign_up", methods=['GET', 'POST'])
def sign_up():
    if current_user.is_authenticated:
        return redirect(url_for('home'))
    form = RegistrationForm()
    if form.validate_on_submit():
        hashed_password = bcrypt.generate_password_hash(form.password.data).decode('utf-8')
        user = User(username=form.username.data, email=form.email.data, password=hashed_password)
        db.session.add(user)
        db.session.commit()
        flash('Your account has been created! You are now able to log in', 'success')
        return redirect(url_for('login'))
    return render_template('sign_up.html', title = 'Sign Up', form=form)


@app.route("/account", methods=['GET', 'POST'])
@login_required
def account():
    form = UpdateAccountForm()
    if form.validate_on_submit():
        if form.picture.data:
            picture_file = save_picture(form.picture.data)
            current_user.image_file = picture_file
        current_user.username = form.username.data
        current_user.email = form.email.data
        db.session.commit()
        flash('Your account has been updated!', 'success')
        return redirect(url_for('account'))
    elif request.method == 'GET':
        form.username.data = current_user.username
        form.email.data = current_user.email
    image_file = url_for('static', filename='profile_pics/' + current_user.image_file)
    return render_template('account.html', title='Account',
                           image_file=image_file, form=form)

@app.route("/politician/<string:username>", methods = ['GET', ' POST'])
def politician(username):
    user = User.query.filter_by(username = username).first()
    return render_template("politician.html",user=user)

@app.route("/findlocalPoliticians")
def localPoliticians():
    users = User.query.filter(User.party != None)
    return render_template('find_local_politicans.html', users = users)

@app.route('/politicians/<username>')
def politicians(username):
    user = User.query.filter_by(username=username).first_or_404()
    form = CommentForm()
    if form.validate_on_submit():
        comment = Comment(body = form.body.data, author = current_user)
        db.session.add(comment)
        db.session.commit()
    return render_template('politician.html',form = form,user=user)

def save_picture(form_picture):
    random_hex = secrets.token_hex(8)
    _, f_ext = os.path.splitext(form_picture.filename)
    picture_fn = random_hex + f_ext
    picture_path = os.path.join(app.root_path, 'static/profile_pics', picture_fn)

    output_size = (125, 125)
    i = Image.open(form_picture)
    i.thumbnail(output_size)
    i.save(picture_path)

    return picture_fn
