from flask import Blueprint
from flaskblog.users.forms import RegistrationForm, LoginForm, UpdateAccountForm,  RequestResetForm, ResetPasswordForm
from flaskblog.posts.forms import PostForm
from flask import render_template, url_for, flash, redirect, request
from flask_login import login_user, current_user, logout_user, login_required
from flaskblog import db, bcrypt
from flaskblog.models import User, Post
from flaskblog.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=hashed_password)
        db.session.add(user)
        db.session.commit()
        flash(f'Your accounbt has been created! You are now able to login', '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)
            flash('Login Success!', 'success')
            next_page=request.args.get('next')
            return redirect(next_page) if next_page else redirect(url_for('main.home'))
        else:
            flash('Login Unsuccessfull. 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_pictures/"+current_user.image_file)
    print("profile_pictures/"+current_user.image_file)
    return render_template('account.html', title='Account', image_file=image_file, form=form)


@users.route('/user/<string:username>')
def user_post(username):
    page=request.args.get('page', 1, type=int)
    user=User.query.filter_by(username=username).first_or_404()
    posts=Post.query.filter_by(author=user)\
        .order_by(Post.date_posted.desc())\
        .paginate(page=page, per_page=1)
    return render_template('user_post.html', posts=posts, user=user)


@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 to reset passwords.', 'info')
        return redirect(url_for('users.login'))
    return render_template('reset_request.html', title='Reset Request', 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 not user:
        flash('That is an invalid token', 'warning')
        return redirect(url_for('users.reset_request'))
    form=ResetPasswordForm()

    if form.validate_on_submit():
        hashed_password=bcrypt.generate_password_hash(form.password.data).decode('utf-8')
        user.password=hashed_password
        db.session.commit()
        flash(f'Your password has been updated', 'success')
        return redirect(url_for('users.login'))

    return render_template('reset_token.html', title='Reset Password', form=form)