import {z} from 'zod'

export type GetApiLookupMeOptions = {baseUrl?: string | undefined, BasicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const coreResponse = z.object({ip: z.string(), hostname: z.string().optional(), geo: z.object({city: z.string().optional(), region: z.string().optional(), region_code: z.string().optional(), country: z.string().optional(), country_code: z.string().optional(), continent: z.string().optional(), continent_code: z.string().optional(), latitude: z.number().optional(), longitude: z.number().optional(), timezone: z.string().optional(), postal_code: z.string().optional()}).optional(), as: z.object({asn: z.string().optional(), name: z.string().optional(), domain: z.string().optional(), type: z.enum(["hosting", "isp", "education", "government", "business"]).optional()}).optional(), is_place: z.boolean().optional(), is_anonymous: z.boolean().optional(), is_anycast: z.boolean().optional(), is_hosting: z.boolean().optional(), is_mobile: z.boolean().optional(), is_satellite: z.boolean().optional()});

export const plusResponse = z.object({ip: z.string(), geo: z.object({city: z.string().optional(), region: z.string().optional(), region_code: z.string().optional(), country: z.string().optional(), country_code: z.string().optional(), continent: z.string().optional(), continent_code: z.string().optional(), latitude: z.number().optional(), longitude: z.number().optional(), timezone: z.string().optional(), postal_code: z.string().optional(), dma_code: z.string().optional(), geoname_id: z.string().optional(), radius: z.number().int().optional(), last_changed: z.string().optional()}).optional(), place: z.object({name: z.string().optional(), category: z.string().optional()}).optional(), as: z.object({asn: z.string().optional(), name: z.string().optional(), domain: z.string().optional(), type: z.enum(["hosting", "isp", "education", "government", "business"]).optional(), last_changed: z.string().optional()}).optional(), mobile: z.object({name: z.string().optional(), mcc: z.string().optional(), mnc: z.string().optional()}).optional(), anonymous: z.object({name: z.string().optional(), is_proxy: z.boolean().optional(), is_relay: z.boolean().optional(), is_tor: z.boolean().optional(), is_vpn: z.boolean().optional()}).optional(), is_place: z.boolean().optional(), is_anonymous: z.boolean().optional(), is_anycast: z.boolean().optional(), is_hosting: z.boolean().optional(), is_mobile: z.boolean().optional(), is_satellite: z.boolean().optional()});

export const maxResponse = z.object({ip: z.string(), hostname: z.string().optional(), geo: z.object({city: z.string().optional(), region: z.string().optional(), region_code: z.string().optional(), country: z.string().optional(), country_code: z.string().optional(), continent: z.string().optional(), continent_code: z.string().optional(), latitude: z.number().optional(), longitude: z.number().optional(), timezone: z.string().optional(), postal_code: z.string().optional(), dma_code: z.string().optional(), geoname_id: z.string().optional(), radius: z.number().int().optional(), last_changed: z.string().optional()}), place: z.object({name: z.string().optional(), category: z.string().optional(), ssid: z.string().optional(), latitude: z.number().optional(), longitude: z.number().optional()}).optional(), as: z.object({asn: z.string().optional(), name: z.string().optional(), domain: z.string().optional(), type: z.enum(["hosting", "isp", "education", "government", "business"]).optional(), last_changed: z.string().optional()}), mobile: z.object({name: z.string().optional(), mcc: z.string().optional(), mnc: z.string().optional()}).optional(), anonymous: z.object({name: z.string().optional(), last_seen: z.string().optional(), percent_days_seen: z.number().int().optional(), is_proxy: z.boolean().optional(), is_relay: z.boolean().optional(), is_tor: z.boolean().optional(), is_vpn: z.boolean().optional(), is_res_proxy: z.boolean().optional()}), is_place: z.boolean().optional(), is_anonymous: z.boolean().optional(), is_anycast: z.boolean().optional(), is_hosting: z.boolean().optional(), is_mobile: z.boolean().optional(), is_satellite: z.boolean().optional()});

export const getApiLookupMeResponse = z.union([coreResponse, plusResponse, maxResponse]);

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
};

/**
 * Returns IP information about the current IP.
 * 
 * GET /lookup/me
 * 
 * Also accepts auth: BearerAuth, ApiKeyAuth
 */
export const getApiLookupMe = async (options?: GetApiLookupMeOptions) => {
const {baseUrl = "https://api.ipinfo.io", fetch: fetchFn = fetch, BasicAuth} = options ?? {}

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

if (BasicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${BasicAuth.username}:${BasicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/lookup/me${query.size > 0 ? `?${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(getApiLookupMeResponse, await res.json())
};