import {z} from 'zod'

export type GetApiThingsArgs = {'Accept-Language'?: string | undefined, summary?: boolean | undefined, staticDataOnly?: boolean | undefined};

export type GetApiThingsOptions = {baseUrl: string, oauth2?: string | undefined, fetch?: typeof fetch | undefined};

export const enrichedChannelDTO = z.object({uid: z.string().optional(), id: z.string().optional(), channelTypeUID: z.string().optional(), itemType: z.string().optional(), kind: z.string().optional(), label: z.string().optional(), description: z.string().optional(), defaultTags: z.array(z.string()).optional(), properties: z.record(z.string(), z.string()).optional(), configuration: z.record(z.string(), z.object({})).optional(), autoUpdatePolicy: z.string().optional(), linkedItems: z.array(z.string()).optional()});

export const thingStatusInfo = z.object({status: z.enum(["UNINITIALIZED", "INITIALIZING", "UNKNOWN", "ONLINE", "OFFLINE", "REMOVING", "REMOVED"]).optional(), statusDetail: z.enum(["NONE", "NOT_YET_READY", "HANDLER_MISSING_ERROR", "HANDLER_REGISTERING_ERROR", "HANDLER_INITIALIZING_ERROR", "HANDLER_CONFIGURATION_PENDING", "CONFIGURATION_PENDING", "COMMUNICATION_ERROR", "CONFIGURATION_ERROR", "BRIDGE_OFFLINE", "FIRMWARE_UPDATING", "DUTY_CYCLE", "BRIDGE_UNINITIALIZED", "GONE", "DISABLED"]).optional(), description: z.string().optional()});

export const firmwareStatusDTO = z.object({status: z.string().optional(), updatableVersion: z.string().optional()});

export const enrichedThingDTO = z.object({label: z.string().optional(), bridgeUID: z.string().optional(), configuration: z.record(z.string(), z.object({})).optional(), properties: z.record(z.string(), z.string()).optional(), UID: z.string().optional(), thingTypeUID: z.string().optional(), location: z.string().optional(), channels: z.array(enrichedChannelDTO).optional(), statusInfo: thingStatusInfo.optional(), firmwareStatus: firmwareStatusDTO.optional(), editable: z.boolean().optional()});

export const getApiThingsResponse = z.array(enrichedThingDTO);

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 things.
 * 
 * GET /things
 */
export const getApiThings = async (args: GetApiThingsArgs, options: GetApiThingsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, oauth2} = 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']))
if (args.summary != null) query.append("summary", String(args.summary))
if (args.staticDataOnly != null) query.append("staticDataOnly", String(args.staticDataOnly))
if (oauth2 !== undefined) headers.set('authorization', `Bearer ${oauth2}`)

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