import {z} from 'zod'

export type GetApiWhatsappWaGroupParticipantsArgs = {groupId: string, lastPhoneNumber?: string | undefined, olderThanTimestamp?: string | undefined};

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

export const participant = z.object({name: z.string().nullable().optional(), phoneNumber: z.string().optional(), dateJoined: z.string().nullable().optional(), dateRemoved: z.string().nullable().optional(), dateLeft: z.string().nullable().optional()});

export const listParticipantsResponse = z.object({participants: z.array(participant).optional(), hasMore: z.boolean().optional(), lastPhoneNumber: z.string().nullable().optional(), olderThanTimestamp: z.string().nullable().optional()});

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
};

/**
 * Get WhatsApp group participants
 * 
 * GET /whatsapp/wa-group/participants
 */
export const getApiWhatsappWaGroupParticipants = async (args: GetApiWhatsappWaGroupParticipantsArgs, options?: GetApiWhatsappWaGroupParticipantsOptions) => {
const {baseUrl = "https://public.doubletick.io", fetch: fetchFn = fetch} = options ?? {}

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

if (args.groupId != null) query.append("groupId", String(args.groupId))
if (args.lastPhoneNumber != null) query.append("lastPhoneNumber", String(args.lastPhoneNumber))
if (args.olderThanTimestamp != null) query.append("olderThanTimestamp", String(args.olderThanTimestamp))

const url = `${baseUrl.replace(/\/+$/, '')}/whatsapp/wa-group/participants${query.size > 0 ? `?${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(listParticipantsResponse, await res.json())
};