import {z} from 'zod'

export type GetApiActionsThingUIDArgs = {thingUID: string, 'Accept-Language'?: string | undefined};

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

export const input = z.object({name: z.string().optional(), type: z.string().optional(), label: z.string().optional(), description: z.string().optional(), required: z.boolean().optional(), tags: z.array(z.string()).optional(), reference: z.string().optional(), defaultValue: z.string().optional()});

export const output = z.object({name: z.string().optional(), type: z.string().optional(), tags: z.array(z.string()).optional(), label: z.string().optional(), description: z.string().optional(), reference: z.string().optional(), defaultValue: z.string().optional()});

export const thingActionDTO = z.object({actionUid: z.string().optional(), label: z.string().optional(), description: z.string().optional(), inputs: z.array(input).optional(), outputs: z.array(output).optional()});

export const getApiActionsThingUIDResponse = z.array(thingActionDTO);

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 all available actions for provided thing UID
 * 
 * GET /actions/{thingUID}
 */
export const getApiActionsThingUID = async (args: GetApiActionsThingUIDArgs, options: GetApiActionsThingUIDOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args['Accept-Language'] != null) headers.set("Accept-Language", String(args['Accept-Language']))

const url = `${baseUrl.replace(/\/+$/, '')}/actions/${encodeURIComponent(String(args.thingUID))}${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(getApiActionsThingUIDResponse, await res.json())
};