import {z} from 'zod'

export type GetApiTileMatrixSetsArgs = {f?: ('json' | 'html') | undefined};

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

export const link = z.object({href: z.string(), rel: z.string(), type: z.string().optional(), templated: z.boolean().optional(), hreflang: z.string().optional(), title: z.string().optional(), length: z.number().int().optional()});

export const tileMatrixSetItem = z.object({id: z.string().optional(), title: z.string().optional(), uri: z.string().optional(), crs: z.union([z.string(), z.object({uri: z.string()}), z.object({wkt: z.object({})}), z.object({referenceSystem: z.object({})})]).optional(), links: z.array(link)});

export const getApiTileMatrixSetsResponse = z.object({tileMatrixSets: z.array(tileMatrixSetItem).optional()});

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
};

/**
 * Retrieve the list of available tiling schemes (tile matrix sets)
 * 
 * GET /tileMatrixSets
 */
export const getApiTileMatrixSets = async (args: GetApiTileMatrixSetsArgs, options?: GetApiTileMatrixSetsOptions) => {
const {baseUrl = "https://maps.ecere.com/ogcapi", fetch: fetchFn = fetch} = options ?? {}

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

if (args.f != null) query.append("f", String(args.f))

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