import {z} from 'zod'

export type FetchRequest = {address?: (string | null) | undefined, fields?: (Array<string> | null) | undefined, lat?: (number | null) | undefined, lng?: (number | null) | undefined, preset?: ('terrain' | 'flood_risk' | 'wildfire_underwrite' | 'land_cover' | 'site_selection' | 'building_lookup' | 'points_of_interest' | 'utilities' | 'boundaries' | 'solar_siting' | 'wind_siting' | 'storage_siting' | 'data_center_siting' | 'grid_interconnect' | 'natural_hazard' | null) | undefined};

export type CreateApiV1FetchArgs = {body: FetchRequest};

export type CreateApiV1FetchOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiV1FetchResponse = 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
};

/**
 * Fetch
 * 
 * POST /v1/fetch
 */
export const createApiV1Fetch = async (args: CreateApiV1FetchArgs, options?: CreateApiV1FetchOptions) => {
const {baseUrl = "https://api.mireye.com", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/fetch${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiV1FetchResponse, await res.json())
};