import {z} from 'zod'

export type GetApiPoliciesNamePolicyNameVersionsArgs = {policy_name: string};

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

export const policyDBResponse = z.object({policy_id: z.string(), policy_name: z.string(), version_number: z.number().int().optional(), version_status: z.string().optional(), parent_version_id: z.string().nullable().optional(), is_latest: z.boolean().optional(), published_at: z.string().nullable().optional(), production_at: z.string().nullable().optional(), inherit: z.string().nullable().optional(), description: z.string().nullable().optional(), guardrails_add: z.array(z.string()).optional(), guardrails_remove: z.array(z.string()).optional(), condition: z.record(z.string(), z.unknown()).nullable().optional(), pipeline: z.record(z.string(), z.unknown()).nullable().optional(), created_at: z.string().nullable().optional(), updated_at: z.string().nullable().optional(), created_by: z.string().nullable().optional(), updated_by: z.string().nullable().optional()});

export const policyVersionListResponse = z.object({policy_name: z.string(), versions: z.array(policyDBResponse).optional(), total_count: z.number().int().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
};

/**
 * List Policy Versions
 * 
 * GET /policies/name/{policy_name}/versions
 * 
 * Also accepts auth: APIKeyHeader, APIKeyHeader, APIKeyHeader, APIKeyHeader, APIKeyHeader
 */
export const getApiPoliciesNamePolicyNameVersions = async (args: GetApiPoliciesNamePolicyNameVersionsArgs, options: GetApiPoliciesNamePolicyNameVersionsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (APIKeyHeader !== undefined) headers.set("x-litellm-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/policies/name/${encodeURIComponent(String(args.policy_name))}/versions${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(policyVersionListResponse, await res.json())
};