import {z} from 'zod'

export type GetApiCollectionsCollectionIdItemsArgs = {collectionId: string, limit?: number | undefined, bbox?: Array<number> | undefined, datetime?: string | undefined};

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

export const pointGeoJSON = z.object({type: z.literal("Point"), coordinates: z.array(z.number())});

export const multipointGeoJSON = z.object({type: z.literal("MultiPoint"), coordinates: z.array(z.array(z.number()))});

export const linestringGeoJSON = z.object({type: z.literal("LineString"), coordinates: z.array(z.array(z.number()))});

export const multilinestringGeoJSON = z.object({type: z.literal("MultiLineString"), coordinates: z.array(z.array(z.array(z.number())))});

export const polygonGeoJSON = z.object({type: z.literal("Polygon"), coordinates: z.array(z.array(z.array(z.number())))});

export const multipolygonGeoJSON = z.object({type: z.literal("MultiPolygon"), coordinates: z.array(z.array(z.array(z.array(z.number()))))});

export const geometrycollectionGeoJSON = z.object({type: z.literal("GeometryCollection"), geometries: z.array(z.lazy(() => geometryGeoJSON))});

export const geometryGeoJSON: z.ZodType<GeometryGeoJSON> = z.union([pointGeoJSON, multipointGeoJSON, linestringGeoJSON, multilinestringGeoJSON, polygonGeoJSON, multipolygonGeoJSON, geometrycollectionGeoJSON]);

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

export const featureGeoJSON = z.object({type: z.literal("Feature"), geometry: geometryGeoJSON, properties: z.object({}).nullable(), id: z.union([z.string(), z.number().int()]).optional(), links: z.array(link).optional()});

export const timeStamp = z.string();

export const numberMatched = z.number().int().gte(0);

export const numberReturned = z.number().int().gte(0);

export const featureCollectionGeoJSON = z.object({type: z.literal("FeatureCollection"), features: z.array(featureGeoJSON), links: z.array(link).optional(), timeStamp: timeStamp.optional(), numberMatched: numberMatched.optional(), numberReturned: numberReturned.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
};

/**
 * fetch features
 * 
 * GET /collections/{collectionId}/items
 */
export const getApiCollectionsCollectionIdItems = async (args: GetApiCollectionsCollectionIdItemsArgs, options?: GetApiCollectionsCollectionIdItemsOptions) => {
const {baseUrl = "http://bbox:8080", fetch: fetchFn = fetch} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (args.bbox != null) query.append("bbox", args.bbox.join(','))
if (args.datetime != null) query.append("datetime", String(args.datetime))

const url = `${baseUrl.replace(/\/+$/, '')}/collections/${encodeURIComponent(String(args.collectionId))}/items${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(featureCollectionGeoJSON, await res.json())
};