import {z} from 'zod'

export type GetApiSignalEventsArgs = {scopeId: string, scopeType: string};

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

export const eventSubscriptionDTO = z.object({id: z.string().optional(), eventType: z.string().optional(), eventName: z.string().optional(), activityId: z.string().optional(), activityName: z.string().optional(), activityType: z.string().optional(), attachedToActivityId: z.string().optional(), attachedToActivityName: z.string().optional(), created: z.string().optional()});

export const getApiSignalEventsResponse = z.array(eventSubscriptionDTO);

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
};

/**
 * Get signal events
 * 
 * GET /signal-events
 */
export const getApiSignalEvents = async (args: GetApiSignalEventsArgs, options?: GetApiSignalEventsOptions) => {
const {baseUrl = "http://localhost:8090/inspect-api", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.scopeId != null) query.append("scopeId", String(args.scopeId))
if (args.scopeType != null) query.append("scopeType", String(args.scopeType))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

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