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import type { Context } from "hono";
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import type { z } from "zod";
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/**
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 * Parse the JSON body against a Zod schema.
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 * Returns the parsed data, or a 400 Response if validation fails.
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 */
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export async function parseBody<T extends z.ZodType>(c: Context, schema: T): Promise<z.infer<T> | Response> {
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  let raw: unknown;
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  try {
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    raw = await c.req.json();
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  } catch {
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    return c.json({ error: "invalid_json", message: "Request body is not valid JSON" }, 400);
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  }
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  const body = schema.safeParse(raw);
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  if (!body.success) {
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    return c.json({ error: "validation_error", message: body.error.issues[0].message, issues: body.error.issues }, 400);
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  }
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  return body.data;
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}