import {z} from 'zod'

export type Wildcard = '*';

export type AddressPattern = unknown | unknown | unknown | unknown;

export type AssetIdPattern = string;

export type OutputReferencePattern = string;

export type GetApiPatternsPatternArgs = {pattern: Wildcard | AddressPattern | AssetIdPattern | OutputReferencePattern};

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

export const wildcard = z.literal("*");

export const addressPattern = z.union([z.unknown(), z.unknown(), z.unknown(), z.unknown()]);

export const assetIdPattern = z.string();

export const outputReferencePattern = z.string();

export const pattern = z.union([wildcard, addressPattern, assetIdPattern, outputReferencePattern]);

export const getApiPatternsPatternResponse = z.array(pattern);

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
};

/**
 * Get Pattern (*)
 * 
 * GET /patterns/{pattern}
 */
export const getApiPatternsPattern = async (args: GetApiPatternsPatternArgs, options?: GetApiPatternsPatternOptions) => {
const {baseUrl = "http://localhost:1442", fetch: fetchFn = fetch} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json;charset=utf-8")

const url = `${baseUrl.replace(/\/+$/, '')}/patterns/${encodeURIComponent(String(args.pattern))}${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(getApiPatternsPatternResponse, await res.json())
};