"""
Main application routes (Login, Logout, Dashboard)
"""
from flask import (
    Blueprint, render_template, request, session, redirect, url_for, 
    flash, current_app
)
from app.auth import authenticate_user, get_user_by_id
import logging

logger = logging.getLogger(__name__)

main_bp = Blueprint('main', __name__)


@main_bp.route('/', methods=['GET'])
def index():
    """Redirect to dashboard if logged in, otherwise to login"""
    if 'user_id' in session:
        return redirect(url_for('main.dashboard'))
    return redirect(url_for('main.login'))


@main_bp.route('/login', methods=['GET', 'POST'])
def login():
    """Login page and authentication"""
    if request.method == 'POST':
        username = request.form.get('username', '').strip()
        password = request.form.get('password', '')
        
        if not username or not password:
            flash('Username and password are required', 'error')
            return render_template('login.html')
        
        # Authenticate user
        user = authenticate_user(username, password)
        
        if user:
            # Store user information in session
            session.permanent = True
            session['user_id'] = user['id']
            session['username'] = user['username']
            session['email'] = user['email']
            session['role'] = user['role']
            session['full_name'] = user['full_name']
            session.modified = True  # Force session to be saved
            
            logger.info(f"User {username} logged in successfully")
            logger.debug(f"Session data set: user_id={user['id']}, username={username}")
            flash(f'Welcome, {user["full_name"]}!', 'success')
            
            return redirect(url_for('main.dashboard'))
        else:
            flash('Invalid username or password', 'error')
            logger.warning(f"Failed login attempt for user: {username}")
    
    return render_template('login.html')


@main_bp.route('/dashboard', methods=['GET'])
def dashboard():
    """Main dashboard page"""
    if 'user_id' not in session:
        return redirect(url_for('main.login'))
    
    user_id = session.get('user_id')
    user = get_user_by_id(user_id)
    
    if not user:
        session.clear()
        flash('User session invalid', 'error')
        return redirect(url_for('main.login'))
    
    modules = [
        {
            'name': 'Quality Module',
            'description': 'Manage quality checks and inspections',
            'icon': 'fa-check-circle',
            'color': 'primary',
            'url': url_for('quality.quality_index')
        },
        {
            'name': 'Warehouse Module',
            'description': 'Manage warehouse operations and inventory',
            'icon': 'fa-warehouse',
            'color': 'info',
            'url': url_for('warehouse.warehouse_index')
        },
        {
            'name': 'Settings',
            'description': 'Configure application settings',
            'icon': 'fa-cog',
            'color': 'secondary',
            'url': url_for('settings.settings_index')
        }
    ]
    
    return render_template('dashboard.html', user=user, modules=modules)


@main_bp.route('/logout', methods=['GET', 'POST'])
def logout():
    """Logout user"""
    username = session.get('username', 'Unknown')
    session.clear()
    logger.info(f"User {username} logged out")
    flash('You have been logged out successfully', 'success')
    return redirect(url_for('main.login'))


@main_bp.route('/profile', methods=['GET'])
def profile():
    """User profile page"""
    if 'user_id' not in session:
        return redirect(url_for('main.login'))
    
    user_id = session.get('user_id')
    user = get_user_by_id(user_id)
    
    if not user:
        session.clear()
        return redirect(url_for('main.login'))
    
    return render_template('profile.html', user=user)