import { z } from "zod";

export const fetchConfigSchema = z.object({
  defaultMethod: z.enum(["GET", "POST"]).default("GET"),
  defaultHeaders: z.record(z.string(), z.string()).default({}),
  timeout: z.number().int().positive().max(60000).default(10000),
  maxResponseSize: z.number().int().positive().max(1048576).default(102400),
  allowedDomains: z.array(z.string().min(1)).default(["*"]),
  blockedDomains: z.array(z.string().min(1)).default([]),
  parseMode: z.enum(["raw", "markdown", "json"]).default("markdown"),
});

export type FetchToolConfig = z.infer<typeof fetchConfigSchema>;

export const DEFAULT_FETCH_CONFIG: FetchToolConfig = {
  defaultMethod: "GET",
  defaultHeaders: {},
  timeout: 10000,
  maxResponseSize: 102400,
  allowedDomains: ["*"],
  blockedDomains: [],
  parseMode: "markdown",
};

export function parseFetchConfig(raw: unknown): FetchToolConfig {
  const parsed = fetchConfigSchema.safeParse(raw);
  if (!parsed.success) {
    throw new Error(`Invalid fetch config: ${parsed.error.message}`);
  }
  return parsed.data;
}