from flask import Blueprint, render_template, url_for, flash, redirect, request, abort
from flaskblog import db, bcrypt
from flaskblog.users.forms import RegistrationForm,LoginForm,UpdateAccountForm, RequestResetForm, ResetPasswordForm
from flaskblog.models import User, Post
from flask_login import login_user, current_user, logout_user, login_required
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_pw = bcrypt.generate_password_hash(form.password.data).decode('utf-8')
		user = User(username=form.username.data,email=form.email.data,password=hashed_pw)
		db.create_all()
		db.session.add(user)
		db.session.commit()
		flash(f'You account has been created successfully !!','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)
			next_page = request.args.get('next')
			return redirect(next_page) if next_page else redirect(url_for('main.home'))
		else:
			flash(f'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('users.login'))


@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(f'Your account is updated successfully!!','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>",methods=['GET'])
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=3)
    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 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):
	user = User.verify_reset_token(token)
	if user is None:
		flash('This is an invalid or expired token, please reset the token','warning')
		return redirect(url_for('users.reset_request'))
	form = ResetPasswordForm()
	if form.validate_on_submit():
		hashed_pw = bcrypt.generate_password_hash(form.password.data).decode('utf-8')
		user.password = hashed_pw
		db.session.commit()
		flash(f'You password has been reset successfully !!','success')
		return redirect(url_for('users.login'))
	return render_template('reset_token.html',title='Reset Password',form=form)
