from flask import render_template, url_for, flash, redirect, request, Blueprint
from flask_login import login_user, current_user, logout_user, login_required
from audiology import db, bcrypt
from audiology.models import User, Post, PrivatePlaylist, Song
from audiology.users.forms import (RegistrationForm, LoginForm, UpdateAccountForm,
                                   RequestResetForm, ResetPasswordForm)
from audiology.users.utils import save_picture, send_reset_email

users = Blueprint('users', __name__) 


@users.route("/register", methods=['GET', 'POST'])
def register():
    if current_user.is_authenticated:  
        return redirect(url_for('main.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=<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('users.login'))
    return render_template('register.html', title='Register', form=form)


@users.route("/login", methods=['GET', 'POST'])
def login():
    if current_user.is_authenticated: 
        return redirect(url_for('main.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('main.home'))
        else:
            flash('Login Unsuccessful. Please check email and password.', 'danger')
    return render_template('login.html', title='Login', form=form)


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


@users.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('users.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)


@users.route("/user/<string:username>")
@login_required
def user_playlist(username):

    if current_user.username != username:
        content = flash("You do not have permissions to view this user's playlist", "danger")
        return redirect(url_for("main.home"))
    page = request.args.get("page", 1, type=int)
    delete_song = request.args.get("delete_song", type=int)
    user = User.query.filter_by(username=username).first_or_404()
    songs = PrivatePlaylist.query.filter_by(username_id=user.id).first()

    if songs:
        length = len(songs.songs)
    else:
        length = 0
    if delete_song:
        for song in songs.songs:
            if song.id == delete_song:
                songs.songs.remove(song)
                db.session.commit()
                flash("Song was successfully removed from your playlist.", "success")
                return redirect(url_for("users.user_playlist", username=username))
    return render_template('user_playlist.html', songs=songs, user=user, length=length)


@users.route("/user/update")
@login_required
def update_playlist():
    add_song = request.args.get("add_song_to_playlist", type=int)
    page = request.args.get("page", 1, type=int)

    user = User.query.filter_by(username=current_user.username).first_or_404()
    playlist = PrivatePlaylist.query.filter_by(username_id=current_user.id).first()
    song_to_add = Song.query.filter_by(id=add_song).first()

    playlist.songs.append(song_to_add)
    db.session.commit()
    flash("Song was added to your playlist.", "success")
    return redirect(url_for("main.home", username=current_user.username))


@users.route("/reset_password", methods=['GET', 'POST'])
def reset_request():
    if current_user.is_authenticated:
        return redirect(url_for('main.home'))
    form = RequestResetForm()
    if form.validate_on_submit():
        user = User.query.filter_by(email=form.email.data).first()
        send_reset_email(user)
        flash('An email has been sent with instructions on how to reset your password.', 'info')
        return redirect(url_for('users.login'))
    return render_template('reset_request.html', title='Reset Password', form=form)


@users.route("/reset_password/<token>", methods=['GET', 'POST'])
def reset_token(token):
    if current_user.is_authenticated:
        return redirect(url_for('main.home'))
    user = User.verify_reset_token(token)
    if user is None:
        flash('That is an invalid or expired token', 'warning')
        return redirect(url_for('reset_request'))
    form = ResetPasswordForm()
    if form.validate_on_submit():
        hashed_password = bcrypt.generate_password_hash(
            form.password.data).decode('utf-8')
        user.password = <PASSWORD>
        db.session.commit()
        flash('Your password has been updated. You are now able to log in.', 'success')
        return redirect(url_for('users.login'))
    return render_template('reset_token.html', title='Reset Password', form=form)
