"""Event handling example for fastapi-route-loader."""

from fastapi import APIRouter, FastAPI

from fastapi_route_loader import (
    RouterContainer,
    RouterEvent,
    RouterEventType,
)

app = FastAPI(title="Event Handling Example")
container = RouterContainer()

event_log: list[str] = []


@container.on(None)
def log_router_event(event: RouterEvent) -> None:
    """Log all router events."""
    message = f"[{event.event_type.value.upper()}] Router: {event.router_name}"
    event_log.append(message)
    print(message)


@container.on(RouterEventType.LOADED)
def on_router_loaded(event: RouterEvent) -> None:
    """Handle router loaded events."""
    print(f"✅ Router '{event.router_name}' has been loaded")
    if event.metadata:
        print(f"   Metadata: {event.metadata}")


@container.on(RouterEventType.UNLOADED)
def on_router_unloaded(event: RouterEvent) -> None:
    """Handle router unloaded events."""
    print(f"❌ Router '{event.router_name}' has been unloaded")

users_router = APIRouter(prefix="/users", tags=["users"])


@users_router.get("/")
def list_users() -> dict[str, list[str]]:
    """List all users."""
    return {"users": ["alice", "bob"]}


container.add_router("users", users_router, metadata={"version": "1.0"})

posts_router = APIRouter(prefix="/posts", tags=["posts"])


@posts_router.get("/")
def list_posts() -> dict[str, list[str]]:
    """List all posts."""
    return {"posts": ["post1", "post2"]}


container.add_router("posts", posts_router, metadata={"version": "1.0"})

container.remove_router("posts")

container.register_to_app(app)

if __name__ == "__main__":
    print("\n=== Event Log ===")
    for log_entry in event_log:
        print(log_entry)

    import uvicorn

    uvicorn.run(app, host="0.0.0.0", port=8000)