import {z} from 'zod'

export type WebhookSubscription = {id?: string | undefined, type: 'webhook_subscription', active?: boolean | undefined, delivery_method: {id?: string | undefined, secret?: (string | null) | undefined, temporarily_disabled?: boolean | undefined, type: 'http_delivery_method', url: string, custom_headers?: (Array<{name?: string | undefined, value?: string | undefined}>) | undefined}, description?: string | undefined, events: Array<string>, filter: {id?: string | undefined, type: 'account_reference' | 'service_reference' | 'team_reference'}, oauth_client?: ({id: string, type: 'oauth_client_reference', summary?: string | undefined}) | undefined};

export type CreateApiWebhookSubscriptionsArgs = {Accept: string, 'Content-Type': 'application/json', body: {webhook_subscription: WebhookSubscription}};

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

export const webhookSubscription = z.object({id: z.string().optional(), type: z.literal("webhook_subscription"), active: z.boolean().optional(), delivery_method: z.object({id: z.string().optional(), secret: z.string().nullable().optional(), temporarily_disabled: z.boolean().optional(), type: z.literal("http_delivery_method"), url: z.string(), custom_headers: z.array(z.object({name: z.string().optional(), value: z.string().optional()})).optional()}), description: z.string().optional(), events: z.array(z.string()), filter: z.object({id: z.string().optional(), type: z.enum(["account_reference", "service_reference", "team_reference"])}), oauth_client: z.object({id: z.string(), type: z.literal("oauth_client_reference"), summary: z.string().optional()}).optional()});

export const createApiWebhookSubscriptionsResponse = z.object({webhook_subscription: webhookSubscription});

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 a webhook subscription
 * 
 * POST /webhook_subscriptions
 */
export const createApiWebhookSubscriptions = async (args: CreateApiWebhookSubscriptionsArgs, options?: CreateApiWebhookSubscriptionsOptions) => {
const {baseUrl = "https://api.pagerduty.com", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.Accept != null) headers.set("Accept", String(args.Accept))
if (args['Content-Type'] != null) headers.set("Content-Type", String(args['Content-Type']))
if (apiKey !== undefined) headers.set("Authorization", apiKey)

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