import {z} from 'zod'

export type GetApiDiscoverArgs = {key: unknown, q: string, at?: unknown | undefined, in?: string | undefined, limit?: number | undefined, lang?: string | undefined};

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

export const address = z.object({label: z.string().optional(), countryCode: z.string().optional(), countryName: z.string().optional(), stateCode: z.string().optional(), state: z.string().optional(), county: z.string().optional(), city: z.string().optional(), district: z.string().optional(), street: z.string().optional(), postalCode: z.string().optional(), houseNumber: z.string().optional()});

export const scoring = z.object({queryScore: z.number().optional(), fieldScore: z.object({}).optional()});

export const position = z.object({lat: z.string().optional(), lng: z.string().optional()});

export const access = z.object({lat: z.number().optional(), lng: z.number().optional()});

export const mapView = z.object({west: z.string().optional(), south: z.string().optional(), east: z.string().optional(), north: z.string().optional()});

export const categories = z.object({id: z.string().optional(), name: z.string().optional(), primary: z.string().optional()});

export const contactObject = z.object({label: z.string().optional(), value: z.string().optional(), categories: z.array(z.object({id: z.string().optional()})).optional()});

export const contacts = z.object({phone: z.array(contactObject).optional(), mobile: z.array(contactObject).optional(), tollFree: z.array(contactObject).optional(), fax: z.array(contactObject).optional(), www: z.array(contactObject).optional(), email: z.array(contactObject).optional()});

export const getApiDiscoverResponse = z.object({items: z.array(z.object({title: z.string().optional(), id: z.string().optional(), address: address.optional(), scoring: scoring.optional(), position: position.optional(), access: access.optional(), distance: z.number().int().optional(), mapView: mapView.optional(), categories: z.array(categories).optional(), contacts: z.array(contacts).optional(), openingHours: z.object({timeRanges: z.array(z.object({startTime: z.object({date: z.string().optional(), hour: z.number().int().optional(), minute: z.number().int().optional()}).optional(), endTime: z.object({date: z.string().optional(), hour: z.number().int().optional(), minute: z.number().int().optional()}).optional()})).optional()}).optional()})).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
};

/**
 * Discover matching places
 * 
 * GET /discover
 */
export const getApiDiscover = async (args: GetApiDiscoverArgs, options?: GetApiDiscoverOptions) => {
const {baseUrl = "https://api.nextbillion.io", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.key != null) query.append("key", String(args.key))
if (args.q != null) query.append("q", String(args.q))
if (args.at != null) query.append("at", String(args.at))
if (args.in != null) query.append("in", String(args.in))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.lang != null) query.append("lang", String(args.lang))
if (apiKey !== undefined) query.set("key", apiKey)

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