import asyncio

from fastapi import APIRouter, Depends
from modules.config_manager import ConfigManager
from modules.network_scanner import NetworkScanner

router = APIRouter(prefix="/api/network", tags=["network"])


def get_config() -> ConfigManager:
    from main import app_config
    return app_config


@router.get("/topology")
async def get_topology(config: ConfigManager = Depends(get_config)):
    scan_config = config.get_network_scan_config()
    configured_nodes = config.get_nodes()

    scanner = NetworkScanner(subnet=scan_config.get("subnet", "192.168.1.0/24"))

    if scan_config.get("enabled", False):
        try:
            scan_data = await asyncio.to_thread(scanner.scan)
            discovered = scanner.parse_scan_results(scan_data)
            nodes = scanner.merge_with_config(discovered, configured_nodes)
        except Exception:
            nodes = [{**n, "status": "unknown"} for n in configured_nodes]
    else:
        nodes = [{**n, "status": "unknown"} for n in configured_nodes]

    # Ping all nodes for current status
    ips = [n["ip"] for n in nodes]
    statuses = await scanner.ping_all(ips)
    for node in nodes:
        node["status"] = "up" if statuses.get(node["ip"], False) else "down"

    return {"nodes": nodes, "scan_enabled": scan_config.get("enabled", False)}