"""
Mission Control 2.0 — dünner FastAPI-Einstieg.

Hängt die Router ein, liefert (in Prod) das gebaute React-Frontend aus und
setzt eine no-cache-Middleware. Im Dev läuft das Frontend über den Vite-Dev-
Server (proxyt /api hierher), daher CORS für localhost offen.
"""

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import FileResponse
from fastapi.staticfiles import StaticFiles
from starlette.requests import Request

from config import FRONTEND_DIST, VERSION
from routers import connect, health, memory, models, routing, system

app = FastAPI(title="Mission Control 2.0", version=VERSION)

# Dev: Vite-Dev-Server (5173) ruft das Backend per /api auf.
app.add_middleware(
    CORSMiddleware,
    allow_origins=["http://localhost:5173", "http://127.0.0.1:5173"],
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.middleware("http")
async def no_cache(request: Request, call_next):
    resp = await call_next(request)
    if request.url.path.startswith("/api"):
        resp.headers["Cache-Control"] = "no-cache"
    return resp


app.include_router(health.router)
app.include_router(models.router)
app.include_router(routing.router)
app.include_router(system.router)
app.include_router(connect.router)
app.include_router(memory.router)


# Prod: gebautes Frontend ausliefern (falls vorhanden). SPA-Fallback auf index.html.
if FRONTEND_DIST.exists():
    app.mount("/assets", StaticFiles(directory=FRONTEND_DIST / "assets"), name="assets")

    @app.get("/{full_path:path}")
    def spa(full_path: str):
        index = FRONTEND_DIST / "index.html"
        if index.exists():
            return FileResponse(index)
        return {"detail": "frontend not built"}