import {z} from 'zod'

export type RequestType = 'rtLocation' | 'rtAssistance' | 'custom';

export type NrfGpsMessageType = number;

export type Mcc = number;

export type Mnc = number | string;

export type Tac = number;

export type Eci = number;

export type Rsrp = number;

export type FilteredEphemerisFlag = boolean;

export type SatelliteMaskAngle = number;

export type HeadApiLocationAgpsArgs = {requestType?: RequestType | undefined, customTypes?: Array<NrfGpsMessageType> | undefined, types?: Array<NrfGpsMessageType> | undefined, mcc?: Mcc | undefined, mnc?: Mnc | undefined, tac?: Tac | undefined, eci?: Eci | undefined, rsrp?: Rsrp | undefined, filtered?: FilteredEphemerisFlag | undefined, mask?: SatelliteMaskAngle | undefined};

export type HeadApiLocationAgpsOptions = {baseUrl?: string | undefined, OrganizationAuthToken?: string | undefined, fetch?: typeof fetch | undefined};

export const assistanceBuffer = z.object({});

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
};

/**
 * GetFileSize
 * 
 * HEAD /location/agps
 * 
 * Also accepts auth: JSON Web Token
 */
export const headApiLocationAgps = async (args: HeadApiLocationAgpsArgs, options?: HeadApiLocationAgpsOptions) => {
const {baseUrl = "https://api.nrfcloud.com/v1", fetch: fetchFn = fetch, OrganizationAuthToken} = options ?? {}

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

if (args.requestType != null) query.append("requestType", String(args.requestType))
for (const item of args.customTypes ?? []) query.append("customTypes", String(item))
for (const item of args.types ?? []) query.append("types", String(item))
if (args.mcc != null) query.append("mcc", String(args.mcc))
if (args.mnc != null) query.append("mnc", String(args.mnc))
if (args.tac != null) query.append("tac", String(args.tac))
if (args.eci != null) query.append("eci", String(args.eci))
if (args.rsrp != null) query.append("rsrp", String(args.rsrp))
if (args.filtered != null) query.append("filtered", String(args.filtered))
if (args.mask != null) query.append("mask", String(args.mask))
if (OrganizationAuthToken !== undefined) headers.set('authorization', `Bearer ${OrganizationAuthToken}`)

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

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

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

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