import {z} from 'zod'

export type GetApiJSONWebsocketViewMessagesOptions = {baseUrl?: string | undefined, apiKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const errorJson = z.object({code: z.string(), message: z.string(), detail: z.string().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
};

/**
 * Returns a list of all of the messages that meet the given criteria (all optional), where channelId is a channel identifier, start is the offset to start returning messages from (starting from 0), count is the number of messages to return (default no limit) and payloadPreviewLength is the maximum number bytes to return for the payload contents
 * 
 * GET /JSON/websocket/view/messages/
 * 
 * Also accepts auth: apiKeyQuery
 */
export const getApiJSONWebsocketViewMessages = async (options?: GetApiJSONWebsocketViewMessagesOptions) => {
const {baseUrl = "http://zap", fetch: fetchFn = fetch, apiKeyHeader} = options ?? {}

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

if (apiKeyHeader !== undefined) headers.set("X-ZAP-API-Key", apiKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/JSON/websocket/view/messages/${query.size > 0 ? `?${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(errorJson, await res.json())
};