from __future__ import annotations

from pathlib import Path

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

from app.api.conversations import router as conversations_router
from app.api.documents import router as documents_router
from app.api.health import router as health_router
from app.api.questions import router as questions_router
from app.core.config import get_settings


def create_app() -> FastAPI:
    settings = get_settings()
    app = FastAPI(title=settings.app_name, version="1.0.0")

    app.add_middleware(
        CORSMiddleware,
        allow_origins=["*"],
        allow_methods=["*"],
        allow_headers=["*"],
        allow_credentials=True,
    )

    app.include_router(health_router)
    app.include_router(documents_router)
    app.include_router(conversations_router)
    app.include_router(questions_router)

    static_dir = Path(__file__).parent / "static"
    app.mount("/static", StaticFiles(directory=static_dir), name="static")

    @app.get("/")
    def root() -> dict[str, str]:
        return {
            "app": settings.app_name,
            "docs": "/docs",
            "demo": "/demo",
            "health": "/health",
        }

    @app.get("/demo", include_in_schema=False)
    def demo() -> FileResponse:
        return FileResponse(static_dir / "demo.html")

    return app


app = create_app()