from dash import Output, Input, html
import dash_bootstrap_components as dbc
from utils.logger import get_logger
from database.redis_manager import get_sync_redis_manager

logger = get_logger("default_logger")


def register_redis_callbacks(app):
    """Register Redis status and statistics callbacks."""

    # Redis Status and Statistics
    @app.callback(
        [Output('redis-status', 'children'),
         Output('redis-stats', 'children')],
        Input('interval-component', 'n_intervals')
    )
    def update_redis_status(n_intervals):
        """Update Redis connection status and statistics."""
        try:
            redis_status = _get_redis_status()
            redis_stats = _get_redis_statistics()

            return redis_status, redis_stats

        except Exception as e:
            logger.error(f"Error updating Redis status: {e}")
            error_alert = dbc.Alert(
                f"Error: {str(e)}",
                color="danger",
                dismissable=True
            )
            return error_alert, error_alert


def _get_redis_status() -> html.Div:
    """Get detailed Redis server status."""
    try:
        redis_manager = get_sync_redis_manager()
        redis_manager.initialize()

        if not redis_manager.client.ping():
            raise ConnectionError("Redis server is not responding.")

        info = redis_manager.client.info()
        status_badge = dbc.Badge("Connected", color="success", className="me-1")

        return html.Div([
            html.H5("Redis Status"),
            status_badge,
            html.P(f"Version: {info.get('redis_version', 'N/A')}"),
            html.P(f"Mode: {info.get('redis_mode', 'N/A')}")
        ])
    except Exception as e:
        logger.error(f"Failed to get Redis status: {e}")
        return html.Div([
            html.H5("Redis Status"),
            dbc.Badge("Error", color="danger", className="me-1"),
            dbc.Alert(f"Error: {e}", color="danger", dismissable=True)
        ])


def _get_redis_statistics() -> html.Div:
    """Get detailed Redis statistics."""
    try:
        redis_manager = get_sync_redis_manager()
        redis_manager.initialize()

        if not redis_manager.client.ping():
            raise ConnectionError("Redis server is not responding.")

        info = redis_manager.client.info()

        return html.Div([
            html.H5("Redis Statistics"),
            html.P(f"Connected Clients: {info.get('connected_clients', 'N/A')}"),
            html.P(f"Memory Used: {info.get('used_memory_human', 'N/A')}"),
            html.P(f"Total Commands Processed: {info.get('total_commands_processed', 'N/A')}")
        ])
    except Exception as e:
        logger.error(f"Failed to get Redis statistics: {e}")
        return dbc.Alert(f"Error: {e}", color="danger", dismissable=True)