import {z} from 'zod'

export type GetApiV1WebhooksOptions = {baseUrl: string, TokenBasic?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const webhook = z.object({id: z.string().optional(), url: z.string(), description: z.string().nullable().optional(), enabled_events: z.array(z.enum(["all", "shipment_purchased", "shipment_cancelled", "shipment_fulfilled", "shipment_out_for_delivery", "shipment_needs_attention", "shipment_delivery_failed", "tracker_created", "tracker_updated", "order_created", "order_updated", "order_fulfilled", "order_cancelled", "order_delivered", "batch_queued", "batch_failed", "batch_running", "batch_completed"])), disabled: z.boolean().nullable().optional(), object_type: z.string().optional(), last_event_at: z.string().nullable().optional(), secret: z.string(), test_mode: z.boolean()});

export const webhookList = z.object({count: z.number().int().nullable().optional(), next: z.string().nullable().optional(), previous: z.string().nullable().optional(), results: z.array(webhook)});

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 all webhooks
 * 
 * GET /v1/webhooks
 * 
 * Also accepts auth: Token, OAuth2, JWT
 */
export const getApiV1Webhooks = async (options: GetApiV1WebhooksOptions) => {
const {baseUrl, fetch: fetchFn = fetch, TokenBasic} = options ?? {}

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

if (TokenBasic !== undefined) headers.set('authorization', `Basic ${btoa(`${TokenBasic.username}:${TokenBasic.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/webhooks${query.size > 0 ? `?${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(webhookList, await res.json())
};