import {z} from 'zod'

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

export const apiVersion = z.object({apiBaseUrls: z.array(z.string()).optional(), path: z.string(), version: z.string().optional()});

export const version = z.object({apiVersions: z.record(z.string(), z.record(z.string(), apiVersion)).optional(), buildDate: z.string().optional(), buildFlags: z.array(z.string()).optional(), capabilities: z.array(z.string()).optional(), revision: z.string().optional(), runtimeVersion: z.string().optional(), version: z.string().optional()});

export const pagination = z.object({limit: z.number(), offset: z.number(), totalCount: z.number()});

export const meta = z.object({apiEnrollmentVersion: z.string().optional(), apiVersion: z.string().optional(), filterableFields: z.array(z.string()).optional(), pagination: pagination.optional()});

export const listVersionEnvelope = z.object({data: version, meta: meta});

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
};

/**
 * Returns version information
 * 
 * GET /version
 */
export const getApiVersion = async (options?: GetApiVersionOptions) => {
const {baseUrl = "https://demo.ziti.dev/edge/client/v1", fetch: fetchFn = fetch} = options ?? {}

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

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