import {z} from 'zod'

export type GetApiRpgFieldIdIdFieldArgs = {id_field: string, year_from?: number | undefined, year_to?: number | undefined};

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

export const cRS = z.object({type: z.literal("name").optional(), properties: z.record(z.string(), z.unknown()).nullable()});

export const geometryTypeEnum = z.enum(["Point", "LineString", "Polygon"]);

export const geometry = z.object({type: geometryTypeEnum, coordinates: z.array(z.unknown())});

export const feature = z.object({type: z.literal("Feature").optional(), properties: z.record(z.string(), z.unknown()).nullable(), geometry: geometry});

export const fieldFeatureCollection = z.object({type: z.literal("FeatureCollection").optional(), crs: cRS.nullable(), features: z.array(feature).nullable()});

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
};

/**
 * Get Field Info By Id Field
 * 
 * GET /rpg/field/@id/{id_field}
 */
export const getApiRpgFieldIdIdField = async (args: GetApiRpgFieldIdIdFieldArgs, options: GetApiRpgFieldIdIdFieldOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyQuery} = options ?? {}

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

if (args.year_from != null) query.append("year_from", String(args.year_from))
if (args.year_to != null) query.append("year_to", String(args.year_to))
if (APIKeyQuery !== undefined) query.set("kermap_token", APIKeyQuery)

const url = `${baseUrl.replace(/\/+$/, '')}/rpg/field/@id/${encodeURIComponent(String(args.id_field))}${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(fieldFeatureCollection, await res.json())
};