import {z} from 'zod'

export type GetApiPublicSelfServeV1TopicPolicyArgs = {'app-instance'?: string | undefined};

export type GetApiPublicSelfServeV1TopicPolicyOptions = {baseUrl: string, httpAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const topicPolicyKind = z.literal("TopicPolicy");

export const applicationPolicyMetadata = z.object({name: z.string()});

export const constraintKind = z.enum(["AllowedKeys", "Match", "NoneOf", "OneOf", "Range"]);

export const allowedKeys = z.object({constraint: constraintKind, optional: z.boolean().optional(), keys: z.array(z.string())});

export const match = z.object({constraint: constraintKind, optional: z.boolean().optional(), pattern: z.string()});

export const noneOf = z.object({constraint: constraintKind, optional: z.boolean().optional(), values: z.array(z.string())});

export const oneOf = z.object({constraint: constraintKind, optional: z.boolean().optional(), values: z.array(z.string())});

export const range = z.object({constraint: constraintKind, optional: z.boolean().optional(), min: z.number().int(), max: z.number().int()});

export const policyConstraintDto = z.discriminatedUnion("constraint", [allowedKeys, match, noneOf, oneOf, range]);

export const mapPolicyConstraintDto = z.record(z.string(), policyConstraintDto);

export const applicationPolicySpec = z.object({policies: mapPolicyConstraintDto});

export const topicPolicyResourceV1 = z.object({apiVersion: z.string(), kind: topicPolicyKind, metadata: applicationPolicyMetadata, spec: applicationPolicySpec});

export const getApiPublicSelfServeV1TopicPolicyResponse = z.array(topicPolicyResourceV1);

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 TopicPolicy resources
 * 
 * GET /public/self-serve/v1/topic-policy
 */
export const getApiPublicSelfServeV1TopicPolicy = async (args: GetApiPublicSelfServeV1TopicPolicyArgs, options: GetApiPublicSelfServeV1TopicPolicyOptions) => {
const {baseUrl, fetch: fetchFn = fetch, httpAuth} = options ?? {}

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

if (args['app-instance'] != null) query.append("app-instance", String(args['app-instance']))
if (httpAuth !== undefined) headers.set('authorization', `Bearer ${httpAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/public/self-serve/v1/topic-policy${query.size > 0 ? `?${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(getApiPublicSelfServeV1TopicPolicyResponse, await res.json())
};