import {z} from 'zod'

export type GetApiCoordinatesTransformCoordinatesJsonArgs = {coordinates: string, s_srs?: number | undefined, t_srs?: number | undefined, ops?: string | undefined};

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

export const getApiCoordinatesTransformCoordinatesJsonResponse = z.object({results: z.array(z.object({x: z.number().optional(), y: z.number().optional(), z: z.number().optional()})), transformer_selection_strategy: z.string()});

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
};

/**
 * Transform coordinates
 * 
 * GET /coordinates/transform/{coordinates}.json
 */
export const getApiCoordinatesTransformCoordinatesJson = async (args: GetApiCoordinatesTransformCoordinatesJsonArgs, options?: GetApiCoordinatesTransformCoordinatesJsonOptions) => {
const {baseUrl = "https://api.maptiler.com", fetch: fetchFn = fetch, key} = options ?? {}

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

if (args.s_srs != null) query.append("s_srs", String(args.s_srs))
if (args.t_srs != null) query.append("t_srs", String(args.t_srs))
if (args.ops != null) query.append("ops", String(args.ops))
if (key !== undefined) query.set("key", key)

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