import {z} from 'zod'

export type GetApiGraphCollectionIdNodeArgs = {collection_id: string, name: string};

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

export const knowledgeGraphVizNode = z.object({id: z.string(), entity_type: z.string().optional(), description: z.string().optional(), description_parts: z.array(z.string()).optional(), source_chunk_count: z.number().int().optional(), file_paths: z.array(z.string()).optional(), created_at: z.unknown()});

export const knowledgeGraphVizEdge = z.object({id: z.string().optional(), source: z.string(), target: z.string(), description: z.string().optional(), description_parts: z.array(z.string()).optional(), keywords: z.string().optional(), weight: z.number().nullable().optional(), source_chunk_count: z.number().int().optional()});

export const knowledgeGraphSourceChunk = z.object({id: z.string(), content: z.string(), content_truncated: z.boolean().optional(), file_path: z.string().optional()});

export const knowledgeGraphNodeDetail = z.object({node: knowledgeGraphVizNode, edges: z.array(knowledgeGraphVizEdge), source_chunks: z.array(knowledgeGraphSourceChunk)});

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 full detail for one knowledge-graph node.
 * 
 * GET /graph/{collection_id}/node
 */
export const getApiGraphCollectionIdNode = async (args: GetApiGraphCollectionIdNodeArgs, options?: GetApiGraphCollectionIdNodeOptions) => {
const {baseUrl = "https://h2ogpte.genai.h2o.ai/api/v1", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.name != null) query.append("name", String(args.name))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/graph/${encodeURIComponent(String(args.collection_id))}/node${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(knowledgeGraphNodeDetail, await res.json())
};