import {z} from 'zod'

export type EdgeDetectRequest = {fact_ids: Array<string>, include_constitution?: boolean | undefined, auto_save?: boolean | undefined, min_weight?: number | undefined, batch_size?: number | undefined};

export type CreateApiPotsPotIdEdgesDetectArgs = {pot_id: string, body: EdgeDetectRequest};

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

export const edgeType = z.enum(["supports", "contradicts", "resolved_contradiction", "refines", "derives_from", "is_part_of", "extends", "cites", "related_to", "supersedes", "restates"]);

export const detectedEdgeResponse = z.object({from_id: z.string(), to_id: z.string(), type: edgeType, weight: z.number(), rationale: z.string(), direction: z.string()});

export const edgeDetectMetadata = z.object({pairs_analyzed: z.number().int(), edges_found: z.number().int(), edges_saved: z.number().int().optional(), edges_updated: z.number().int().optional(), duration_ms: z.number().int(), model: z.string()});

export const edgeDetectResponse = z.object({edges: z.array(detectedEdgeResponse), metadata: edgeDetectMetadata});

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
};

/**
 * Detect edges between facts and the Constitution using LLM
 * 
 * POST /pots/{pot_id}/edges/detect
 */
export const createApiPotsPotIdEdgesDetect = async (args: CreateApiPotsPotIdEdgesDetectArgs, options: CreateApiPotsPotIdEdgesDetectOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/pots/${encodeURIComponent(String(args.pot_id))}/edges/detect${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(edgeDetectResponse, await res.json())
};