import {z} from 'zod'

export type PayloadChannel = {recipient: string, personalized_attributes?: {[key: string]: unknown} | undefined, sender_attributes?: Array<string> | undefined, personalized_attachments?: {[key: string]: string} | undefined, live_activity_attributes?: ({la_type?: ('start' | 'update' | 'end') | undefined, attribute_info?: {[key: string]: unknown} | undefined, content_state?: {[key: string]: unknown} | undefined}) | undefined};

export type InformRequest = {alert_id?: string | undefined, alert_reference_name?: string | undefined, user_id?: string | undefined, transaction_id: string, payloads: {SMS?: PayloadChannel | undefined, EMAIL?: PayloadChannel | undefined, PUSH?: PayloadChannel | undefined}};

export type CreateApiAlertsSendArgs = {body: InformRequest};

export type CreateApiAlertsSendOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, moeAppKey?: string | undefined, fetch?: typeof fetch | undefined};

export const channelStatus = z.object({message: z.string().optional(), err_code: z.string().optional(), status_code: z.number().int().optional()});

export const informSuccessResponse = z.object({message: z.string().optional(), request_id: z.string().optional(), SMS: channelStatus.optional(), EMAIL: channelStatus.optional(), PUSH: channelStatus.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
};

/**
 * Send Transactional Alert
 * 
 * POST /alerts/send
 */
export const createApiAlertsSend = async (args: CreateApiAlertsSendArgs, options?: CreateApiAlertsSendOptions) => {
const {baseUrl = "https://api-01.moengage.com/v1.0", fetch: fetchFn = fetch, basicAuth, moeAppKey} = options ?? {}

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

if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)
if (moeAppKey !== undefined) headers.set("MOE-APPKEY", moeAppKey)

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

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

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