import {z} from 'zod'

export type GetApiV1HitlApprovalsArgs = {conversation_id?: (string | null) | undefined, status?: (string | null) | undefined, approver_role?: (string | null) | undefined, cursor?: (string | null) | undefined, limit?: number | undefined};

export type GetApiV1HitlApprovalsOptions = {baseUrl: string, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const subjectKind = z.enum(["workflow_node", "tool_call"]);

export const approvalRequestSummary = z.object({id: z.string(), conversation_id: z.string(), node_id: z.string().nullable(), subject_kind: subjectKind, subject_ref: z.string(), approver_role: z.string(), status: z.string(), suspend_message: z.string().nullable().optional(), created_at: z.string(), timeout_at: z.string().nullable().optional()});

export const cursorPageApprovalRequestSummary = z.object({items: z.array(approvalRequestSummary), next_cursor: z.string().nullable().optional(), has_more: z.boolean()});

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
};

/**
 * List approval requests
 * 
 * GET /v1/hitl/approvals
 */
export const getApiV1HitlApprovals = async (args: GetApiV1HitlApprovalsArgs, options: GetApiV1HitlApprovalsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args.conversation_id != null) query.append("conversation_id", String(args.conversation_id))
if (args.status != null) query.append("status", String(args.status))
if (args.approver_role != null) query.append("approver_role", String(args.approver_role))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.limit != null) query.append("limit", String(args.limit))
if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/hitl/approvals${query.size > 0 ? `?${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(cursorPageApprovalRequestSummary, await res.json())
};