import {z} from 'zod'

export type STIXContentEncoding = 'gzip';

export type STIXMetadataObject = {[key: string]: unknown};

export type STIXPatternType = 'stix';

export type STIXObject = {confidence?: number | undefined, created?: string | undefined, external_references?: Array<STIXMetadataObject> | undefined, id: string, indicator_types?: Array<string> | undefined, kill_chain_phases?: Array<STIXMetadataObject> | undefined, labels?: Array<string> | undefined, modified?: string | undefined, object_marking_refs?: Array<string> | undefined, pattern?: string | undefined, pattern_type?: STIXPatternType | undefined, revoked?: boolean | undefined, spec_version?: string | undefined, type: string, valid_from?: string | undefined, valid_until?: string | undefined} | {[key: string]: unknown};

export type STIXSpecVersion = '2.1';

export type STIXBundleType = 'bundle';

export type STIXBundleRequest = {id: string, objects: Array<STIXObject>, spec_version?: STIXSpecVersion | undefined, type: STIXBundleType} | {[key: string]: unknown};

export type CreateApiApiV2SecurityThreatIntelStixArgs = {ti_vendor: string, 'Content-Encoding'?: STIXContentEncoding | undefined, body: STIXBundleRequest};

export type CreateApiApiV2SecurityThreatIntelStixOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, appKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const sTIXIngestResponseAttributes = z.object({accepted: z.number().int().gte(0), invalid: z.number().int().gte(0), unsupported: z.number().int().gte(0)});

export const sTIXIngestResponseType = z.literal("threat-intel-stix-ingest");

export const sTIXIngestResponseData = z.object({attributes: sTIXIngestResponseAttributes, id: z.string(), type: sTIXIngestResponseType});

export const sTIXIngestResponse = z.object({data: sTIXIngestResponseData});

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
};

/**
 * Ingest STIX threat intelligence
 * 
 * POST /api/v2/security/threat-intel/stix
 * 
 * Also accepts auth: AuthZ
 */
export const createApiApiV2SecurityThreatIntelStix = async (args: CreateApiApiV2SecurityThreatIntelStixArgs, options?: CreateApiApiV2SecurityThreatIntelStixOptions) => {
const {baseUrl = "https://api.datadoghq.com", fetch: fetchFn = fetch, apiKeyAuth, appKeyAuth} = options ?? {}

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

if (args.ti_vendor != null) headers.set("ti_vendor", String(args.ti_vendor))
if (args['Content-Encoding'] != null) headers.set("Content-Encoding", String(args['Content-Encoding']))
if (apiKeyAuth !== undefined) headers.set("DD-API-KEY", apiKeyAuth)
if (appKeyAuth !== undefined) headers.set("DD-APPLICATION-KEY", appKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/security/threat-intel/stix${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(sTIXIngestResponse, await res.json())
};