import {z} from 'zod'

export type GetApiV2ListPhoneNumbersArgs = {limit?: number | undefined, sort_order?: ('ascending' | 'descending') | undefined, pagination_key?: string | undefined};

export type GetApiV2ListPhoneNumbersOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const agentVersionReference = z.union([z.string().min(1).max(20), z.number().int().gte(0)]);

export const agentWeight = z.object({agent_id: z.string().min(1), agent_version: agentVersionReference.optional(), weight: z.number().gt(0).lte(1)});

export const sipCodecList = z.array(z.string().min(1));

export const phoneNumberResponse = z.object({phone_number: z.string(), phone_number_type: z.enum(["retell-twilio", "retell-telnyx", "retell-bandwidth", "custom"]), phone_number_pretty: z.string().optional(), allowed_inbound_country_list: z.array(z.string()).nullable().optional(), allowed_outbound_country_list: z.array(z.string()).nullable().optional(), area_code: z.number().int().optional(), inbound_agents: z.array(agentWeight).nullable().optional(), outbound_agents: z.array(agentWeight).nullable().optional(), inbound_sms_agents: z.array(agentWeight).nullable().optional(), outbound_sms_agents: z.array(agentWeight).nullable().optional(), nickname: z.string().nullable().optional(), inbound_webhook_url: z.string().nullable().optional(), inbound_sms_webhook_url: z.string().nullable().optional(), last_modification_timestamp: z.number().int(), sip_outbound_trunk_config: z.object({termination_uri: z.string().nullable().optional(), auth_username: z.string().nullable().optional(), transport: z.string().nullable().optional(), codecs: sipCodecList.optional()}).nullable().optional(), fallback_number: z.string().nullable().optional(), inbound_fallback_enabled: z.boolean().optional()});

export const getApiV2ListPhoneNumbersResponse = z.object({pagination_key: z.string().optional(), has_more: z.boolean(), items: z.array(phoneNumberResponse)});

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 phone numbers with pagination
 * 
 * GET /v2/list-phone-numbers
 */
export const getApiV2ListPhoneNumbers = async (args: GetApiV2ListPhoneNumbersArgs, options?: GetApiV2ListPhoneNumbersOptions) => {
const {baseUrl = "https://api.retellai.com", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (args.sort_order != null) query.append("sort_order", String(args.sort_order))
if (args.pagination_key != null) query.append("pagination_key", String(args.pagination_key))
if (apiKey !== undefined) headers.set('authorization', `Bearer ${apiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/list-phone-numbers${query.size > 0 ? `?${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(getApiV2ListPhoneNumbersResponse, await res.json())
};