TimeTracker/app/__init__.py

import os
import logging
from datetime import timedelta
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_migrate import Migrate
from flask_login import LoginManager
from flask_socketio import SocketIO
from dotenv import load_dotenv
import re
from jinja2 import ChoiceLoader, FileSystemLoader

# Load environment variables
load_dotenv()

# Initialize extensions
db = SQLAlchemy()
migrate = Migrate()
login_manager = LoginManager()
socketio = SocketIO()

def create_app(config=None):
    """Application factory pattern"""
    app = Flask(__name__)
    
    # Configuration
    app.config.from_object('app.config.Config')
    if config:
        app.config.update(config)
    
    # Add top-level templates directory in addition to app/templates
    extra_templates_path = os.path.abspath(
        os.path.join(app.root_path, '..', 'templates')
    )
    app.jinja_loader = ChoiceLoader([
        app.jinja_loader,
        FileSystemLoader(extra_templates_path)
    ])
    
    # Prefer Postgres if POSTGRES_* envs are present but URL points to SQLite
    current_url = app.config.get('SQLALCHEMY_DATABASE_URI', '')
    if (
        not app.config.get('TESTING')
        and isinstance(current_url, str)
        and current_url.startswith('sqlite')
        and (
            os.getenv('POSTGRES_DB')
            or os.getenv('POSTGRES_USER')
            or os.getenv('POSTGRES_PASSWORD')
        )
    ):
        pg_user = os.getenv('POSTGRES_USER', 'timetracker')
        pg_pass = os.getenv('POSTGRES_PASSWORD', 'timetracker')
        pg_db = os.getenv('POSTGRES_DB', 'timetracker')
        pg_host = os.getenv('POSTGRES_HOST', 'db')
        app.config['SQLALCHEMY_DATABASE_URI'] = (
            f'postgresql+psycopg2://{pg_user}:{pg_pass}@{pg_host}:5432/{pg_db}'
        )
    
    # Initialize extensions
    db.init_app(app)
    migrate.init_app(app, db)
    login_manager.init_app(app)
    socketio.init_app(app, cors_allowed_origins="*")

    # Log effective database URL (mask password)
    db_url = app.config.get('SQLALCHEMY_DATABASE_URI', '')
    try:
        masked_db_url = re.sub(r"//([^:]+):[^@]+@", r"//\\1:***@", db_url)
    except Exception:
        masked_db_url = db_url
    app.logger.info(f"Using database URL: {masked_db_url}")
    
    # Configure login manager
    login_manager.login_view = 'auth.login'
    login_manager.login_message = 'Please log in to access this page.'
    login_manager.login_message_category = 'info'
    
    # Configure session
    app.config['PERMANENT_SESSION_LIFETIME'] = timedelta(
        seconds=int(os.getenv('PERMANENT_SESSION_LIFETIME', 86400))
    )
    
    # Setup logging
    setup_logging(app)
    
    # Register blueprints
    from app.routes.auth import auth_bp
    from app.routes.main import main_bp
    from app.routes.projects import projects_bp
    from app.routes.timer import timer_bp
    from app.routes.reports import reports_bp
    from app.routes.admin import admin_bp
    from app.routes.api import api_bp
    from app.routes.analytics import analytics_bp
    from app.routes.tasks import tasks_bp
    from app.routes.invoices import invoices_bp
    
    app.register_blueprint(auth_bp)
    app.register_blueprint(main_bp)
    app.register_blueprint(projects_bp)
    app.register_blueprint(timer_bp)
    app.register_blueprint(reports_bp)
    app.register_blueprint(admin_bp)
    app.register_blueprint(api_bp)
    app.register_blueprint(analytics_bp)
    app.register_blueprint(tasks_bp)
    app.register_blueprint(invoices_bp)
    
    # Register error handlers
    from app.utils.error_handlers import register_error_handlers
    register_error_handlers(app)
    
    # Register context processors
    from app.utils.context_processors import register_context_processors
    register_context_processors(app)
    
    # Register template filters
    from app.utils.template_filters import register_template_filters
    register_template_filters(app)
    
    # Register CLI commands
    from app.utils.cli import register_cli_commands
    register_cli_commands(app)
    
    # Initialize database on first request
    def initialize_database():
        try:
            # Import models to ensure they are registered
            from app.models import User, Project, TimeEntry, Task, Settings
            
            # Create database tables
            db.create_all()
            
            # Check and migrate Task Management tables if needed
            migrate_task_management_tables()
            
            # Create default admin user if it doesn't exist
            admin_username = app.config.get('ADMIN_USERNAMES', ['admin'])[0]
            if not User.query.filter_by(username=admin_username).first():
                admin_user = User(
                    username=admin_username,
                    role='admin'
                )
                admin_user.is_active = True
                db.session.add(admin_user)
                db.session.commit()
                print(f"Created default admin user: {admin_username}")
            
            print("Database initialized successfully")
        except Exception as e:
            print(f"Error initializing database: {e}")
            # Don't raise the exception, just log it
    
    # Store the initialization function for later use
    app.initialize_database = initialize_database
    
    return app

def setup_logging(app):
    """Setup application logging"""
    log_level = os.getenv('LOG_LEVEL', 'INFO')
    log_file = os.getenv('LOG_FILE')
    
    # Prepare handlers
    handlers = [logging.StreamHandler()]
    
    # Add file handler if log_file is specified
    if log_file:
        try:
            # Ensure log directory exists
            log_dir = os.path.dirname(log_file)
            if log_dir and not os.path.exists(log_dir):
                os.makedirs(log_dir, exist_ok=True)
            
            # Test if we can write to the log file
            file_handler = logging.FileHandler(log_file)
            handlers.append(file_handler)
        except (PermissionError, OSError) as e:
            print(f"Warning: Could not create log file '{log_file}': {e}")
            print("Logging to console only")
            # Don't add file handler, just use console logging
    
    # Configure logging
    logging.basicConfig(
        level=getattr(logging, log_level.upper()),
        format='%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]',
        handlers=handlers
    )
    
        # Suppress Werkzeug logs in production
    if not app.debug:
        logging.getLogger('werkzeug').setLevel(logging.ERROR)

def migrate_task_management_tables():
    """Check and migrate Task Management tables if they don't exist"""
    try:
        from sqlalchemy import inspect, text
        
        # Check if tasks table exists
        inspector = inspect(db.engine)
        existing_tables = inspector.get_table_names()
        
        if 'tasks' not in existing_tables:
            print("Task Management: Creating tasks table...")
            # Create the tasks table
            db.create_all()
            print("✓ Tasks table created successfully")
        else:
            print("Task Management: Tasks table already exists")
        
        # Check if task_id column exists in time_entries table
        if 'time_entries' in existing_tables:
            time_entries_columns = [col['name'] for col in inspector.get_columns('time_entries')]
            if 'task_id' not in time_entries_columns:
                print("Task Management: Adding task_id column to time_entries table...")
                try:
                    # Add task_id column to time_entries table
                    db.engine.execute(text("ALTER TABLE time_entries ADD COLUMN task_id INTEGER REFERENCES tasks(id)"))
                    print("✓ task_id column added to time_entries table")
                except Exception as e:
                    print(f"⚠ Warning: Could not add task_id column: {e}")
                    print("  You may need to manually add this column or recreate the database")
            else:
                print("Task Management: task_id column already exists in time_entries table")
        
        print("Task Management migration check completed")
        
    except Exception as e:
        print(f"⚠ Warning: Task Management migration check failed: {e}")
        print("  The application will continue, but Task Management features may not work properly")

def init_database(app):
    """Initialize database tables and create default admin user"""
    with app.app_context():
        try:
            # Import models to ensure they are registered
            from app.models import User, Project, TimeEntry, Task, Settings
            
            # Create database tables
            db.create_all()
            
            # Check and migrate Task Management tables if needed
            migrate_task_management_tables()
            
            # Create default admin user if it doesn't exist
            admin_username = app.config.get('ADMIN_USERNAMES', ['admin'])[0]
            if not User.query.filter_by(username=admin_username).first():
                admin_user = User(
                    username=admin_username,
                    role='admin'
                )
                admin_user.is_active = True
                db.session.add(admin_user)
                db.session.commit()
                print(f"Created default admin user: {admin_username}")
            
            print("Database initialized successfully")
        except Exception as e:
            print(f"Error initializing database: {e}")
            raise