import {z} from 'zod'

export type GetApiMetaKnowledgeGraphArgs = {format?: string | undefined};

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

export const metaAttribute = z.object({attribute_type_id: z.string(), attribute_source: z.string().nullable().optional(), original_attribute_names: z.array(z.string()).nullable().optional(), constraint_use: z.boolean().optional(), constraint_name: z.string().nullable().optional()});

export const metaNode = z.object({id_prefixes: z.array(z.string()), attributes: z.array(metaAttribute).nullable().optional()});

export const metaQualifier = z.object({qualifier_type_id: z.string(), applicable_values: z.array(z.string()).optional()});

export const metaEdge = z.object({subject: z.string(), predicate: z.string(), object: z.string(), knowledge_types: z.array(z.string()).nullable().optional(), attributes: z.array(metaAttribute).nullable().optional(), qualifiers: z.array(metaQualifier).nullable().optional(), association: z.string().optional()});

export const metaKnowledgeGraph = z.object({nodes: z.record(z.string(), metaNode), edges: z.array(metaEdge)});

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
};

/**
 * Meta knowledge graph representation of this TRAPI web service.
 * 
 * GET /meta_knowledge_graph
 */
export const getApiMetaKnowledgeGraph = async (args: GetApiMetaKnowledgeGraphArgs, options?: GetApiMetaKnowledgeGraphOptions) => {
const {baseUrl = "https://arax.transltr.io/api/arax/v1.4", 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))

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