from __future__ import annotations

import os
import signal
import threading
import time
from datetime import datetime, timezone
from urllib.parse import urlparse

from .config import Config
from .maintenance import storage_info
from .rules import RuleManager
from .state import RuntimeStats
from .store import AlertStore
from .webui import WebServer


def _bool_env(name: str, default: bool = False) -> bool:
    value = os.getenv(name)
    if value is None:
        return default
    return value.strip().lower() in {"1", "true", "yes", "on"}


def _seed_demo_alert(store: AlertStore) -> None:
    if store.summary()["total_alerts"]:
        return

    event = {
        "timestamp": datetime.now(timezone.utc).isoformat(),
        "flow_id": "dev-demo",
        "src_ip": "192.168.100.10",
        "src_port": 51515,
        "dest_ip": "203.0.113.10",
        "dest_port": 443,
        "proto": "TCP",
        "alert": {
            "signature_id": 1001999,
            "signature": "DEV MODE SAMPLE ALERT",
            "category": "Development/Test",
            "severity": 2,
            "action": "allowed",
        },
    }
    store.insert_alert(event, False, None, "development sample")


def _routeros_target(cfg: Config) -> tuple[str, int]:
    parsed = urlparse(cfg.routeros_url)
    host = parsed.hostname or cfg.routeros_url
    port = parsed.port or (443 if parsed.scheme == "https" else 80)
    return host, port


def main() -> int:
    cfg = Config.from_env()
    stop_event = threading.Event()
    stats = RuntimeStats()
    started_at = datetime.now(timezone.utc)
    started_monotonic = time.monotonic()

    os.makedirs(os.path.dirname(cfg.db_path) or ".", exist_ok=True)
    store = AlertStore(cfg.db_path)

    if _bool_env("DEV_SEED_DATA", False):
        _seed_demo_alert(store)

    routeros_host, routeros_port = _routeros_target(cfg)
    rule_manager = RuleManager(cfg, pid_provider=lambda: None, suricata_available=False)

    def health() -> dict:
        db = store.database_info()
        storage = storage_info(cfg.db_path, cfg.eve_path)
        rules = rule_manager.status()
        return {
            "status": "development",
            "mode": "web-only-development",
            "dev_mode": True,
            "operational": True,
            "started_at": started_at.isoformat(),
            "uptime_seconds": round(time.monotonic() - started_monotonic, 1),
            "suricata_running": False,
            "suricata_pid": None,
            "auto_block": False,
            "routeros_configured": False,
            "database": db,
            "storage": storage,
            "rules": rules,
            "services": {
                "web": {
                    "name": "Web UI / API",
                    "status": "up",
                    "details": f"Development server listening on {cfg.web_bind}:{cfg.web_port}",
                },
                "tzsp": {
                    "name": "TZSP receiver",
                    "status": "disabled",
                    "details": "Disabled in web-only development mode",
                },
                "tap": {
                    "name": "TAP interface",
                    "status": "disabled",
                    "details": f"{cfg.tap_name} is not created in development mode",
                },
                "suricata": {
                    "name": "Suricata IDS",
                    "status": "disabled",
                    "details": "Suricata is not started in web-only development mode",
                },
                "eve": {
                    "name": "EVE JSON watcher",
                    "status": "disabled",
                    "details": "EVE watcher is not started in web-only development mode",
                },
                "database": {
                    "name": "SQLite database",
                    "status": "up",
                    "details": f"{db['path']}; {db['rows']} incidents; WAL={db['journal_mode']}",
                },
                "storage": {
                    "name": "Persistent storage",
                    "status": "up",
                    "details": f"{storage['path']}; {storage['used_percent']}% used",
                },
                "rules": {
                    "name": "Managed rules",
                    "status": "disabled",
                    "details": "Editors are visible, but Suricata validation/reload requires full mode",
                },
                "routeros": {
                    "name": "RouterOS REST integration",
                    "status": "disabled",
                    "details": "RouterOS integration and auto-blocking are disabled in development mode",
                },
            },
            "ports": [
                {
                    "name": "Web UI / API",
                    "direction": "listen",
                    "protocol": "TCP",
                    "address": cfg.web_bind,
                    "port": cfg.web_port,
                    "status": "up",
                },
                {
                    "name": "TZSP receiver",
                    "direction": "listen",
                    "protocol": "UDP",
                    "address": cfg.tzsp_bind,
                    "port": cfg.tzsp_port,
                    "status": "disabled",
                },
                {
                    "name": "RouterOS REST API",
                    "direction": "outbound",
                    "protocol": "TCP",
                    "address": routeros_host,
                    "port": routeros_port,
                    "status": "disabled",
                },
            ],
            "runtime": stats.snapshot(),
        }

    web = WebServer(cfg, store, health, stats=stats, rule_manager=rule_manager)

    def request_stop(_signum=None, _frame=None) -> None:
        stop_event.set()

    signal.signal(signal.SIGTERM, request_stop)
    signal.signal(signal.SIGINT, request_stop)

    web.start()
    print(f"[dev] web-only mode active at http://{cfg.web_bind}:{cfg.web_port}", flush=True)

    try:
        while not stop_event.is_set():
            time.sleep(0.25)
    except KeyboardInterrupt:
        stop_event.set()
    finally:
        try:
            web.stop()
        finally:
            store.close()

    return 0


if __name__ == "__main__":
    raise SystemExit(main())