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 generate_password_hash, check_password_hash
from app.core.extensions import db
from app.core.auth import User

bp = Blueprint('auth', __name__, url_prefix='/auth')

@bp.route('/login', methods=['GET', 'POST'])
def login():
    # If already logged in, redirect to dashboard
    if current_user.is_authenticated:
        return redirect(url_for('dashboard.dashboard_home'))
    
    if request.method == 'POST':
        email = request.form.get('email')
        password = request.form.get('password')
        remember = 'remember' in request.form
        
        user = User.query.filter_by(email=email).first()
        
        if user and user.check_password(password):
            login_user(user, remember=remember)
            next_page = request.args.get('next')
            if next_page:
                return redirect(next_page)
            return redirect(url_for('dashboard.dashboard_home'))
        
        flash('Invalid email or password', 'danger')
    
    return render_template('auth/login.html', title='Login')

@bp.route('/register', methods=['GET', 'POST'])
def register():
    # If already logged in, redirect to dashboard
    if current_user.is_authenticated:
        return redirect(url_for('dashboard.dashboard_home'))
    
    if request.method == 'POST':
        email = request.form.get('email')
        password = request.form.get('password')
        password_confirm = request.form.get('password_confirm')
        
        # Check if email already exists
        existing_user = User.query.filter_by(email=email).first()
        if existing_user:
            flash('Email already registered', 'danger')
            return render_template('auth/register.html', title='Register')
        
        # Check if passwords match
        if password != password_confirm:
            flash('Passwords do not match', 'danger')
            return render_template('auth/register.html', title='Register')
        
        # Create new user
        user = User(email=email)
        user.set_password(password)
        
        # Make first user an admin
        if User.query.count() == 0:
            user.is_admin = True
        
        db.session.add(user)
        db.session.commit()
        
        flash('Registration successful! Please log in.', 'success')
        return redirect(url_for('auth.login'))
    
    return render_template('auth/register.html', title='Register')

@bp.route('/logout')
@login_required
def logout():
    logout_user()
    flash('You have been logged out', 'info')
    return redirect(url_for('auth.login'))