import {z} from 'zod'

export type GetApiVpnServersListArgs = {per_page?: number | undefined};

export type GetApiVpnServersListOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiVpnServersListResponse = z.object({success: z.literal(true), vpn_systems: z.object({data: z.array(z.object({id: z.number().int(), server_name: z.string(), ip_address: z.string(), ssh_port: z.number().int(), ssh_username: z.string(), max_connections: z.number().int().nullable(), vpn_type: z.enum(["openVPN", "wireguard", "amneziawg"]), flag_countries: z.string(), status_online: z.union([z.literal(0), z.literal(1)]), is_disabled: z.boolean(), connections_count: z.number().int().gte(0)})), current_page: z.number().int().gte(1), first_page_url: z.string(), from: z.number().int().nullable(), last_page: z.number().int().gte(1), last_page_url: z.string(), next_page_url: z.string().nullable(), path: z.string(), per_page: z.number().int().gte(1).lte(100), prev_page_url: z.string().nullable(), to: z.number().int().nullable(), total: z.number().int().gte(0)}), server_groups: z.array(z.object({id: z.string(), name: z.string(), servers: z.array(z.object({id: z.number().int(), server_name: z.string(), ip_address: z.string(), vpn_type: z.enum(["openVPN", "wireguard", "amneziawg"]), flag_countries: z.string(), status_online: z.boolean(), is_disabled: z.boolean(), connections_count: z.number().int().gte(0)}))}))});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * List VPN servers
 * 
 * GET /vpn/servers/list
 */
export const getApiVpnServersList = async (args: GetApiVpnServersListArgs, options?: GetApiVpnServersListOptions) => {
const {baseUrl = "https://demo.onlinebillingform.com/api/v2", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (args.per_page != null) query.append("per_page", String(args.per_page))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/vpn/servers/list${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiVpnServersListResponse, await res.json())
};