import {z} from 'zod'

export type GetApiV1KnowledgeGapsClustersArgs = {agent_id?: (string | null) | undefined, gap_type?: (string | null) | undefined, product_area?: (string | null) | undefined, priority?: (string | null) | undefined, status?: (string | null) | undefined, owner_user_id?: (string | null) | undefined, sort?: string | undefined, limit?: number | undefined, cursor?: (string | null) | undefined, start_date: string, end_date: string};

export type GetApiV1KnowledgeGapsClustersOptions = {baseUrl: string, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const clusterListRow = z.object({cluster_id: z.string(), label: z.string().nullable().optional(), agent_id: z.string().nullable().optional(), gap_type: z.string(), product_area: z.string().nullable().optional(), priority: z.string().nullable().optional(), status: z.string(), impact_score: z.number(), member_count: z.number().int(), affected_sessions: z.number().int(), escalation_count: z.number().int(), unresolved_count: z.number().int(), gap_event_count: z.number().int(), owner_user_id: z.string().nullable().optional(), first_seen_at: z.string(), last_seen_at: z.string(), fixed_at: z.string().nullable().optional(), reopened_at: z.string().nullable().optional()});

export const clusterListResponse = z.object({items: z.array(clusterListRow), next_cursor: z.string().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
};

/**
 * Paginated list of knowledge-gap clusters with filters and sort
 * 
 * GET /v1/knowledge-gaps/clusters
 */
export const getApiV1KnowledgeGapsClusters = async (args: GetApiV1KnowledgeGapsClustersArgs, options: GetApiV1KnowledgeGapsClustersOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args.agent_id != null) query.append("agent_id", String(args.agent_id))
if (args.gap_type != null) query.append("gap_type", String(args.gap_type))
if (args.product_area != null) query.append("product_area", String(args.product_area))
if (args.priority != null) query.append("priority", String(args.priority))
if (args.status != null) query.append("status", String(args.status))
if (args.owner_user_id != null) query.append("owner_user_id", String(args.owner_user_id))
if (args.sort != null) query.append("sort", String(args.sort))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.start_date != null) query.append("start_date", String(args.start_date))
if (args.end_date != null) query.append("end_date", String(args.end_date))
if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/knowledge-gaps/clusters${query.size > 0 ? `?${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(clusterListResponse, await res.json())
};