from flask import render_template, redirect, request, url_for, flash, session
from flask_login import login_user, logout_user, login_required, \
    current_user

from flask_app.decorators import permission_required
from . import auth
from .. import db
from ..models import User, Permission
from .forms import LoginForm, RegistrationForm
from sqlalchemy import or_
@auth.before_app_request
def before_request():
     if current_user.is_authenticated:
         current_user.ping()


@auth.app_errorhandler(403)
def forbidden_error(error):
    return render_template('403.html')

@auth.route('/user/')
@permission_required(Permission.COMMENT)
def pleaselogin():
    flash("请先登录再访问该页面！")
    return redirect(url_for('auth.login'))

@auth.route('/post/')
@permission_required(Permission.COMMENT)
def pleaselogin2():
    flash("请先登录再访问该页面！")
    return redirect(url_for('auth.login'))

@auth.route('/login', methods=['GET', 'POST'])
def login():
    form = LoginForm()
    if form.validate_on_submit():
        user = User.query.filter(or_(User.email == form.email_or_username.data.lower(), User.username == form.email_or_username.data)).first()
        if user is not None and user.verify_password(form.password.data):    #验证成功
            login_user(user, form.remember_me.data)
            session['color'] = user.avatar_color
            next = session.pop('next', None)
            if next is None:
                next = url_for('main.root')
            return redirect(next)
        flash('账号或密码错误！')
    return render_template('auth/login.html', form=form)
@auth.route('/logout')
@login_required
def logout():
    logout_user()
    return redirect(url_for('main.index'))


@auth.route('/register', methods=['GET', 'POST'])
def register():
    form = RegistrationForm()
    if form.validate_on_submit():
        user = User(email=form.email.data.lower(),
                    username=form.username.data,
                    password=form.password.data)
        user.avatar_color = user.get_random_color()
        db.session.add(user)
        db.session.commit()
        flash('现在可以登录了！')
        return redirect(url_for('auth.login'))
    return render_template('auth/register.html', form=form)