import {z} from 'zod'

export type HttpWebhookOptions = {name: string, vendor: 'generic_post' | 'generic_get', api_version?: string | undefined, events?: (Array<'transfer.cancelled' | 'transfer.error' | 'transfer.success' | 'export_source.created' | 'export_source.updated' | 'export_source.deleted' | 'export_destination.created' | 'export_destination.updated' | 'export_destination.deleted' | 'recipient.created' | 'recipient.updated' | 'recipient.deleted' | 'export_magic_link.created' | 'export_magic_link.deleted'>) | undefined, url: string, api_key?: string | undefined};

export type PagerDutyWebhookOptions = {name: string, vendor: 'pagerduty', api_version?: string | undefined, events?: (Array<'transfer.cancelled' | 'transfer.error' | 'transfer.success' | 'export_source.created' | 'export_source.updated' | 'export_source.deleted' | 'export_destination.created' | 'export_destination.updated' | 'export_destination.deleted' | 'recipient.created' | 'recipient.updated' | 'recipient.deleted' | 'export_magic_link.created' | 'export_magic_link.deleted'>) | undefined, api_key: string};

export type SlackWebhookOptions = {name: string, vendor: 'slack', api_version?: string | undefined, events?: (Array<'transfer.cancelled' | 'transfer.error' | 'transfer.success' | 'export_source.created' | 'export_source.updated' | 'export_source.deleted' | 'export_destination.created' | 'export_destination.updated' | 'export_destination.deleted' | 'recipient.created' | 'recipient.updated' | 'recipient.deleted' | 'export_magic_link.created' | 'export_magic_link.deleted'>) | undefined, url: string};

export type DatadogWebhookOptions = {name: string, vendor: 'datadog', api_version?: string | undefined, events?: (Array<'transfer.cancelled' | 'transfer.error' | 'transfer.success' | 'export_source.created' | 'export_source.updated' | 'export_source.deleted' | 'export_destination.created' | 'export_destination.updated' | 'export_destination.deleted' | 'recipient.created' | 'recipient.updated' | 'recipient.deleted' | 'export_magic_link.created' | 'export_magic_link.deleted'>) | undefined, api_key?: string | undefined};

export type WebhookOptions = HttpWebhookOptions | PagerDutyWebhookOptions | SlackWebhookOptions | DatadogWebhookOptions;

export type CreateWebhookRequest = {webhook: WebhookOptions};

export type CreateApiWebhooksArgs = {body: CreateWebhookRequest};

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

export const stringArray = z.array(z.string());

export const webhook = z.object({id: z.string(), name: z.string(), vendor: z.string(), url: z.string(), api_key: z.string().optional(), api_version: z.string(), created_at: z.string(), updated_at: z.string(), events: stringArray});

export const webhookResponse = z.object({webhook: webhook});

export const createApiWebhooksResponse = z.object({status: z.literal("success"), data: webhookResponse, message: z.string()});

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
};

/**
 * Create webhook
 * 
 * POST /webhooks
 */
export const createApiWebhooks = async (args: CreateApiWebhooksArgs, options?: CreateApiWebhooksOptions) => {
const {baseUrl = "https://api.prequel.co", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set("X-API-KEY", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/webhooks${query.size > 0 ? `?${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(createApiWebhooksResponse, await res.json())
};