"""
StarPunk package initialization
Creates and configures the Flask application
"""

import logging
from flask import Flask


def configure_logging(app):
    """
    Configure application logging based on LOG_LEVEL

    Args:
        app: Flask application instance
    """
    log_level = app.config.get("LOG_LEVEL", "INFO").upper()

    # Set Flask logger level
    app.logger.setLevel(getattr(logging, log_level, logging.INFO))

    # Configure handler with detailed format for DEBUG
    handler = logging.StreamHandler()

    if log_level == "DEBUG":
        formatter = logging.Formatter(
            "[%(asctime)s] %(levelname)s - %(name)s: %(message)s",
            datefmt="%Y-%m-%d %H:%M:%S",
        )

        # Warn if DEBUG enabled in production
        if not app.debug and app.config.get("ENV") != "development":
            app.logger.warning(
                "=" * 70
                + "\n"
                + "WARNING: DEBUG logging enabled in production!\n"
                + "This logs detailed HTTP requests/responses.\n"
                + "Sensitive data is redacted, but consider using INFO level.\n"
                + "Set LOG_LEVEL=INFO in production for normal operation.\n"
                + "=" * 70
            )
    else:
        formatter = logging.Formatter(
            "[%(asctime)s] %(levelname)s: %(message)s", datefmt="%Y-%m-%d %H:%M:%S"
        )

    handler.setFormatter(formatter)

    # Remove existing handlers and add our configured handler
    app.logger.handlers.clear()
    app.logger.addHandler(handler)


def create_app(config=None):
    """
    Application factory for StarPunk

    Args:
        config: Optional configuration dict to override defaults

    Returns:
        Configured Flask application instance
    """
    app = Flask(__name__, static_folder="../static", template_folder="../templates")

    # Load configuration
    from starpunk.config import load_config

    load_config(app, config)

    # Configure logging
    configure_logging(app)

    # Initialize database
    from starpunk.database import init_db

    init_db(app)

    # Register blueprints
    from starpunk.routes import register_routes

    register_routes(app)

    # Error handlers
    @app.errorhandler(404)
    def not_found(error):
        from flask import render_template, request

        # Return HTML for browser requests, JSON for API requests
        if request.path.startswith("/api/"):
            return {"error": "Not found"}, 404
        return render_template("404.html"), 404

    @app.errorhandler(500)
    def server_error(error):
        from flask import render_template, request

        # Return HTML for browser requests, JSON for API requests
        if request.path.startswith("/api/"):
            return {"error": "Internal server error"}, 500
        return render_template("500.html"), 500

    # Health check endpoint for containers and monitoring
    @app.route("/health")
    def health_check():
        """
        Health check endpoint for containers and monitoring

        Returns:
            JSON with status and basic info

        Response codes:
            200: Application healthy
            500: Application unhealthy

        Checks:
            - Database connectivity
            - File system access
            - Basic application state
        """
        from flask import jsonify
        import os

        try:
            # Check database connectivity
            from starpunk.database import get_db

            db = get_db(app)
            db.execute("SELECT 1").fetchone()
            db.close()

            # Check filesystem access
            data_path = app.config.get("DATA_PATH", "data")
            if not os.path.exists(data_path):
                raise Exception("Data path not accessible")

            return (
                jsonify(
                    {
                        "status": "healthy",
                        "version": app.config.get("VERSION", __version__),
                        "environment": app.config.get("ENV", "unknown"),
                    }
                ),
                200,
            )

        except Exception as e:
            return jsonify({"status": "unhealthy", "error": str(e)}), 500

    return app


# Package version (Semantic Versioning 2.0.0)
# See docs/standards/versioning-strategy.md for details
__version__ = "0.9.3"
__version_info__ = (0, 9, 3)