import {z} from 'zod'

export type GetApiRestV1StandardNameArgs = {name: string, format?: ('json' | 'md' | 'csv' | 'oscal') | undefined, section?: string | undefined, subsection?: string | undefined, sectionID?: string | undefined, page?: number | undefined, items_per_page?: number | undefined, version?: string | undefined, hyperlink?: string | undefined, include_only?: Array<string> | undefined};

export type GetApiRestV1StandardNameOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const nodeListResponseSchema = z.object({total_pages: z.number().int().nullable().optional(), page: z.number().int().nullable().optional(), standards: z.array(z.record(z.string(), z.unknown())).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
};

/**
 * Get standard nodes by name
 * 
 * GET /rest/v1/standard/{name}
 */
export const getApiRestV1StandardName = async (args: GetApiRestV1StandardNameArgs, options: GetApiRestV1StandardNameOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.format != null) query.append("format", String(args.format))
if (args.section != null) query.append("section", String(args.section))
if (args.subsection != null) query.append("subsection", String(args.subsection))
if (args.sectionID != null) query.append("sectionID", String(args.sectionID))
if (args.page != null) query.append("page", String(args.page))
if (args.items_per_page != null) query.append("items_per_page", String(args.items_per_page))
if (args.version != null) query.append("version", String(args.version))
if (args.hyperlink != null) query.append("hyperlink", String(args.hyperlink))
for (const item of args.include_only ?? []) query.append("include_only", String(item))

const url = `${baseUrl.replace(/\/+$/, '')}/rest/v1/standard/${encodeURIComponent(String(args.name))}${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(nodeListResponseSchema, await res.json())
};