import {z} from 'zod'

export type TelephonyProvider = 'twilio' | 'sip_trunk' | 'exotel';

export type PhoneNumberSortBy = 'label' | 'phone_number';

export type SortDirection = 'asc' | 'desc';

export type GetApiV1ConvaiV2PhoneNumbersArgs = {page_size?: number | undefined, search?: (string | null) | undefined, label?: (string | null) | undefined, phone_number?: (string | null) | undefined, provider?: (TelephonyProvider | null) | undefined, supports_outbound?: (boolean | null) | undefined, agent_id?: (string | null) | undefined, branch_id?: (string | null) | undefined, sort_by?: (PhoneNumberSortBy | null) | undefined, sort_direction?: SortDirection | undefined, cursor?: (string | null) | undefined, 'xi-api-key'?: (string | null) | undefined};

export type GetApiV1ConvaiV2PhoneNumbersOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const phoneNumberAgentInfo = z.object({agent_id: z.string(), agent_name: z.string(), environment: z.string().nullable().optional(), branch_id: z.string().nullable().optional()});

export const getPhoneNumberTwilioResponseModel = z.object({phone_number: z.string(), label: z.string(), supports_inbound: z.boolean().optional(), supports_outbound: z.boolean().optional(), phone_number_id: z.string(), assigned_agent: phoneNumberAgentInfo.nullable().optional(), provider: z.literal("twilio").optional()});

export const getPhoneNumberExotelResponseModel = z.object({phone_number: z.string(), label: z.string(), supports_inbound: z.boolean().optional(), supports_outbound: z.boolean().optional(), phone_number_id: z.string(), assigned_agent: phoneNumberAgentInfo.nullable().optional(), provider: z.literal("exotel").optional()});

export const sIPTrunkTransportEnum = z.enum(["auto", "udp", "tcp", "tls"]);

export const sIPMediaEncryptionEnum = z.enum(["disabled", "allowed", "required"]);

export const mediaCodec = z.enum(["G722/8000", "PCMU/8000", "PCMA/8000"]);

export const getPhoneNumberOutboundSIPTrunkConfigResponseModel = z.object({address: z.string(), transport: sIPTrunkTransportEnum, media_encryption: sIPMediaEncryptionEnum, headers: z.record(z.string(), z.string()).optional(), attributes_to_headers: z.record(z.string(), z.string()).optional(), has_auth_credentials: z.boolean(), username: z.string().nullable().optional(), has_outbound_trunk: z.boolean().optional(), enabled_codecs: z.array(mediaCodec).optional()});

export const getPhoneNumberInboundSIPTrunkConfigResponseModel = z.object({allowed_addresses: z.array(z.string()), allowed_numbers: z.array(z.string()).nullable(), media_encryption: sIPMediaEncryptionEnum, has_auth_credentials: z.boolean(), username: z.string().nullable().optional(), remote_domains: z.array(z.string()).nullable().optional(), attributes_to_headers: z.record(z.string(), z.string()).optional()});

export const livekitStackType = z.enum(["standard", "static"]);

export const getPhoneNumberSIPTrunkResponseModel = z.object({phone_number: z.string(), label: z.string(), supports_inbound: z.boolean().optional(), supports_outbound: z.boolean().optional(), phone_number_id: z.string(), assigned_agent: phoneNumberAgentInfo.nullable().optional(), provider: z.literal("sip_trunk").optional(), provider_config: getPhoneNumberOutboundSIPTrunkConfigResponseModel.nullable().optional(), outbound_trunk: getPhoneNumberOutboundSIPTrunkConfigResponseModel.nullable().optional(), inbound_trunk: getPhoneNumberInboundSIPTrunkConfigResponseModel.nullable().optional(), livekit_stack: livekitStackType, store_sip_messages: z.boolean().optional()});

export const getPhoneNumbersPageResponseModel = z.object({phone_numbers: z.array(z.discriminatedUnion("provider", [getPhoneNumberTwilioResponseModel, getPhoneNumberExotelResponseModel, getPhoneNumberSIPTrunkResponseModel])), next_cursor: z.string().nullable().optional(), has_more: z.boolean().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
};

/**
 * List Phone Numbers Page
 * 
 * GET /v1/convai/v2/phone-numbers
 */
export const getApiV1ConvaiV2PhoneNumbers = async (args: GetApiV1ConvaiV2PhoneNumbersArgs, options: GetApiV1ConvaiV2PhoneNumbersOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.page_size != null) query.append("page_size", String(args.page_size))
if (args.search != null) query.append("search", String(args.search))
if (args.label != null) query.append("label", String(args.label))
if (args.phone_number != null) query.append("phone_number", String(args.phone_number))
if (args.provider != null) query.append("provider", String(args.provider))
if (args.supports_outbound != null) query.append("supports_outbound", String(args.supports_outbound))
if (args.agent_id != null) query.append("agent_id", String(args.agent_id))
if (args.branch_id != null) query.append("branch_id", String(args.branch_id))
if (args.sort_by != null) query.append("sort_by", String(args.sort_by))
if (args.sort_direction != null) query.append("sort_direction", String(args.sort_direction))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args['xi-api-key'] != null) headers.set("xi-api-key", String(args['xi-api-key']))

const url = `${baseUrl.replace(/\/+$/, '')}/v1/convai/v2/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(getPhoneNumbersPageResponseModel, await res.json())
};