import {z} from 'zod'

export type GetApiSamplingPointPointNotationObservationArgs = {pointNotation: string, skip?: number | undefined, limit?: number | undefined, determinand?: (string | null) | undefined, sampleMaterialType?: (string | null) | undefined, sampleSamplingNotation?: (number | null) | undefined, samplingPurpose?: (string | null) | undefined, date?: (string | null) | undefined, dateFrom?: (string | null) | undefined, dateTo?: (string | null) | undefined, complianceOnly?: boolean | undefined, 'Accept-Crs'?: ('http://www.opengis.net/def/crs/EPSG/0/27700' | 'http://www.opengis.net/def/crs/EPSG/0/4326') | undefined, 'CSV-Header'?: ('present' | 'absent') | undefined, 'API-Version'?: string | undefined};

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

export const getApiSamplingPointPointNotationObservationResponse = z.unknown();

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
};

/**
 * List and filter observations for a specific sampling point by its notation
 * 
 * GET /sampling-point/{pointNotation}/observation
 */
export const getApiSamplingPointPointNotationObservation = async (args: GetApiSamplingPointPointNotationObservationArgs, options?: GetApiSamplingPointPointNotationObservationOptions) => {
const {baseUrl = "https://environment.data.gov.uk/water-quality", fetch: fetchFn = fetch} = options ?? {}

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

if (args.skip != null) query.append("skip", String(args.skip))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.determinand != null) query.append("determinand", String(args.determinand))
if (args.sampleMaterialType != null) query.append("sampleMaterialType", String(args.sampleMaterialType))
if (args.sampleSamplingNotation != null) query.append("sampleSamplingNotation", String(args.sampleSamplingNotation))
if (args.samplingPurpose != null) query.append("samplingPurpose", String(args.samplingPurpose))
if (args.date != null) query.append("date", String(args.date))
if (args.dateFrom != null) query.append("dateFrom", String(args.dateFrom))
if (args.dateTo != null) query.append("dateTo", String(args.dateTo))
if (args.complianceOnly != null) query.append("complianceOnly", String(args.complianceOnly))
if (args['Accept-Crs'] != null) headers.set("Accept-Crs", String(args['Accept-Crs']))
if (args['CSV-Header'] != null) headers.set("CSV-Header", String(args['CSV-Header']))
if (args['API-Version'] != null) headers.set("API-Version", String(args['API-Version']))

const url = `${baseUrl.replace(/\/+$/, '')}/sampling-point/${encodeURIComponent(String(args.pointNotation))}/observation${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(getApiSamplingPointPointNotationObservationResponse, await res.json())
};