from flask import Blueprint, render_template, redirect, url_for, flash, request
from flask_login import login_user, logout_user, current_user, login_required
from werkzeug.security import check_password_hash
from app import db
from models import User
from forms import LoginForm, RegistrationForm
import logging

# Set up logger
logger = logging.getLogger(__name__)

# Create blueprint
auth_bp = Blueprint('auth', __name__, url_prefix='/auth')

@auth_bp.route('/login', methods=['GET', 'POST'])
def login():
    if current_user.is_authenticated:
        return redirect(url_for('forum.index'))
    
    form = LoginForm()
    if form.validate_on_submit():
        # Check if login is email or username
        if '@' in form.username.data:
            user = User.query.filter_by(email=form.username.data).first()
        else:
            user = User.query.filter_by(username=form.username.data).first()
        
        if user is None or not user.check_password(form.password.data):
            flash('Invalid username or password', 'danger')
            return render_template('auth/login.html', form=form)
        
        if user.is_banned:
            flash('Your account has been banned. Reason: ' + (user.ban_reason or 'Not specified'), 'danger')
            return render_template('auth/login.html', form=form)
        
        login_user(user, remember=form.remember_me.data)
        user.update_last_seen()
        
        # Redirect to the page user tried to access
        next_page = request.args.get('next')
        if not next_page or not next_page.startswith('/'):
            next_page = url_for('forum.index')
            
        flash('You have been logged in successfully!', 'success')
        return redirect(next_page)
    
    return render_template('auth/login.html', form=form)

@auth_bp.route('/register', methods=['GET', 'POST'])
def register():
    if current_user.is_authenticated:
        return redirect(url_for('forum.index'))
    
    form = RegistrationForm()
    if form.validate_on_submit():
        user = User(
            username=form.username.data,
            email=form.email.data
        )
        user.set_password(form.password.data)
        
        try:
            db.session.add(user)
            db.session.commit()
            flash('Registration successful! You can now login.', 'success')
            return redirect(url_for('auth.login'))
        except Exception as e:
            logger.error(f"Registration error: {str(e)}")
            db.session.rollback()
            flash('An error occurred during registration. Please try again.', 'danger')
    
    return render_template('auth/register.html', form=form)

@auth_bp.route('/logout')
@login_required
def logout():
    logout_user()
    flash('You have been logged out.', 'info')
    return redirect(url_for('forum.index'))