import {z} from 'zod'

export type GetApiApiV1CitiesOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const meta = z.object({correlation_id: z.string().nullable().optional(), source_status: z.enum(["ok", "no_data", "disabled", "not_ingested", "not_covered"]).optional(), cache_status: z.string().nullable().optional(), covered_cities: z.array(z.string()).optional(), pagination: z.object({total: z.number().int().optional(), returned: z.number().int().optional(), limit: z.number().int().nullable().optional(), offset: z.number().int().optional(), truncated: z.boolean().optional()}).optional()});

export const getApiApiV1CitiesResponse = z.object({data: z.array(z.object({})), 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
};

/**
 * Alle bekannten Städte auflisten
 * 
 * GET /api/v1/cities
 */
export const getApiApiV1Cities = async (options?: GetApiApiV1CitiesOptions) => {
const {baseUrl = "https://infranode.dev", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/cities${query.size > 0 ? `?${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(getApiApiV1CitiesResponse, await res.json())
};