import { Context, Next } from "hono";
import { Env, Variables } from "../types";

export async function authMiddleware(
    c: Context<{ Bindings: Env; Variables: Variables }>,
    next: Next,
) {
    if (!c.env.AUTH_TOKEN) {
        return c.json({
            success: false,
            error: "Authentication token is not specified in worker secrets.",
        }, 500);
    }

    const authToken = c.req.header("Authorization");

    if (!authToken || !authToken.startsWith("Bearer ")) {
        return c.json(
            {
                success: false,
                error:
                    "Authentication token missing or malformed. Expected 'Bearer <token>'.",
            },
            401,
            {
                "WWW-Authenticate": "Bearer",
            },
        );
    }

    const token = authToken.split(" ")[1];
    if (token !== c.env.AUTH_TOKEN) {
        return c.json({
            success: false,
            error: "Authentication token provided is invalid.",
        }, 401);
    }

    await next();
}