"""FastAPI application entry point."""

from contextlib import asynccontextmanager
from typing import AsyncGenerator

from fastapi import FastAPI
from fastapi.openapi.utils import get_openapi

from app.api.v1 import auth, health, incidents, org
from app.config import settings
from app.db import db, redis_client


@asynccontextmanager
async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
    """Manage application lifecycle - connect/disconnect resources."""
    # Startup
    await db.connect(settings.database_url)
    await redis_client.connect(settings.redis_url)
    yield
    # Shutdown
    await redis_client.disconnect()
    await db.disconnect()


app = FastAPI(
    title="IncidentOps",
    description="Incident management API with multi-tenant org support",
    version="0.1.0",
    docs_url="/docs",
    redoc_url="/redoc",
    openapi_url="/openapi.json",
    lifespan=lifespan,
)

app.openapi_tags = [
    {"name": "auth", "description": "Registration, login, token lifecycle"},
    {"name": "org", "description": "Organization membership, services, and notifications"},
    {"name": "incidents", "description": "Incident lifecycle and timelines"},
    {"name": "health", "description": "Service health probes"},
]


def custom_openapi() -> dict:
    """Add JWT bearer security scheme to the generated OpenAPI schema."""

    if app.openapi_schema:
        return app.openapi_schema

    openapi_schema = get_openapi(
        title=app.title,
        version=app.version,
        description=app.description,
        routes=app.routes,
    )
    security_schemes = openapi_schema.setdefault("components", {}).setdefault("securitySchemes", {})
    security_schemes["BearerToken"] = {
        "type": "http",
        "scheme": "bearer",
        "bearerFormat": "JWT",
        "description": "Paste the JWT access token returned by /auth endpoints",
    }
    openapi_schema["security"] = [{"BearerToken": []}]
    app.openapi_schema = openapi_schema
    return app.openapi_schema


app.openapi = custom_openapi  # type: ignore[assignment]

# Include routers
app.include_router(auth.router, prefix=settings.api_v1_prefix)
app.include_router(incidents.router, prefix=settings.api_v1_prefix)
app.include_router(org.router, prefix=settings.api_v1_prefix)
app.include_router(health.router, prefix=settings.api_v1_prefix, tags=["health"])