import fs from "node:fs/promises";
import path from "node:path";

export const SCHEMA_PATH = path.join(process.cwd(), "app.schema.json");

export type Schema = Record<string, { root: any; content: any[] }>;

const FALLBACK: Schema = {
  "/": { root: { props: { title: "Untitled" } }, content: [] },
};

export async function readSchema(): Promise<Schema> {
  try {
    const raw = await fs.readFile(SCHEMA_PATH, "utf8");
    const parsed = JSON.parse(raw);
    if (parsed && typeof parsed === "object") return parsed as Schema;
    return FALLBACK;
  } catch {
    return FALLBACK;
  }
}

export async function writeSchema(schema: Schema): Promise<void> {
  await fs.writeFile(
    SCHEMA_PATH,
    JSON.stringify(schema, null, 2) + "\n",
    "utf8",
  );
}

export async function patchRoute(
  route: string,
  data: { root: any; content: any[] },
): Promise<Schema> {
  const current = await readSchema();
  const next: Schema = { ...current, [route]: data };
  await writeSchema(next);
  return next;
}