import {z} from 'zod'

export type GetApiGraphCollectionIdArgs = {collection_id: string, label?: string | undefined, max_depth?: number | undefined, max_nodes?: number | undefined};

export type GetApiGraphCollectionIdOptions = {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 knowledgeGraphData = z.object({nodes: z.array(knowledgeGraphVizNode), edges: z.array(knowledgeGraphVizEdge), is_truncated: z.boolean(), total_nodes: z.number().int().nullable().optional(), total_relationships: z.number().int().nullable().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
};

/**
 * Read a renderable subgraph of a collection's knowledge graph.
 * 
 * GET /graph/{collection_id}
 */
export const getApiGraphCollectionId = async (args: GetApiGraphCollectionIdArgs, options?: GetApiGraphCollectionIdOptions) => {
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.label != null) query.append("label", String(args.label))
if (args.max_depth != null) query.append("max_depth", String(args.max_depth))
if (args.max_nodes != null) query.append("max_nodes", String(args.max_nodes))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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