import asyncio
import logging
from contextlib import asynccontextmanager

from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from starlette.responses import HTMLResponse, Response

from onguard24 import __version__ as app_version
from onguard24.config import get_settings
from onguard24.db import create_pool
from onguard24.domain.events import InMemoryEventBus
from onguard24.ingress import grafana as grafana_ingress
from onguard24.log_buffer import install_log_handler
from onguard24.modules.registry import MODULE_MOUNTS, register_module_events
from onguard24.root_html import render_root_page
from onguard24.status_snapshot import build as build_status
from onguard24.ui_logs import router as logs_router

logging.basicConfig(level=logging.DEBUG)
# Приглушаем шумные низкоуровневые библиотеки
for _noisy in (
    "httpx",
    "httpcore",
    "asyncio",
    "uvicorn.access",
    "uvicorn.error",
):
    logging.getLogger(_noisy).setLevel(logging.WARNING)
log = logging.getLogger("onguard24")


def parse_addr(http_addr: str) -> tuple[str, int]:
    s = http_addr.strip()
    if s.startswith(":"):
        return "0.0.0.0", int(s[1:])
    if ":" in s:
        h, p = s.rsplit(":", 1)
        return (h or "0.0.0.0"), int(p)
    return "0.0.0.0", int(s)


@asynccontextmanager
async def lifespan(app: FastAPI):
    settings = get_settings()
    install_log_handler(asyncio.get_event_loop(), log_file=settings.log_file)
    pool = await create_pool(settings)
    bus = InMemoryEventBus()
    register_module_events(bus, pool)
    app.state.pool = pool
    app.state.settings = settings
    app.state.event_bus = bus
    log.info("onGuard24 started v%s, db=%s", app_version, "ok" if pool else "disabled")
    yield
    if pool:
        await pool.close()
        log.info("database pool closed")


def create_app() -> FastAPI:
    app = FastAPI(title="onGuard24", version=app_version, lifespan=lifespan)
    app.add_middleware(
        CORSMiddleware,
        allow_origins=["http://localhost:5173", "http://127.0.0.1:5173"],
        allow_credentials=True,
        allow_methods=["GET", "POST", "OPTIONS"],
        allow_headers=["*"],
    )

    @app.get("/")
    async def root(request: Request):
        if request.query_params.get("format") == "json":
            data = await build_status(request)
            data["links"] = {
                "docs": "/docs",
                "openapi": "/openapi.json",
                "health": "/health",
                "status_api": "/api/v1/status",
            }
            return data
        return HTMLResponse(await render_root_page(request))

    @app.get("/favicon.ico", include_in_schema=False)
    async def favicon():
        return Response(status_code=204)

    @app.get("/health")
    @app.get("/api/v1/health")
    async def health():
        return {"status": "ok", "service": "onGuard24"}

    @app.get("/api/v1/status")
    async def status(request: Request):
        return await build_status(request)

    app.include_router(grafana_ingress.router, prefix="/api/v1")
    app.include_router(logs_router)
    for mount in MODULE_MOUNTS:
        app.include_router(mount.router, prefix=mount.url_prefix)
        if mount.ui_router is not None:
            app.include_router(mount.ui_router, prefix=f"/ui/modules/{mount.slug}")

    return app


app = create_app()


def run() -> None:
    import uvicorn

    settings = get_settings()
    host, port = parse_addr(settings.http_addr)
    lvl = settings.log_level.upper()
    uvicorn.run(
        "onguard24.main:app",
        host=host,
        port=port,
        log_level=lvl.lower() if lvl in {"DEBUG", "INFO", "WARNING", "ERROR"} else "info",
    )


if __name__ == "__main__":
    run()