import {z} from 'zod'

export type GetApiLocationsArgs = {locationType: 'city' | 'country' | 'country_region' | 'world_region', limit?: number | undefined, cursor?: string | undefined, cols?: string | undefined};

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

export const apiLocationItem = z.object({id: z.string(), name: z.string(), type: z.enum(["city", "country", "country_region", "world_region"]), city: z.string().optional(), region: z.string().optional(), country: z.string().optional()});

export const locationItemList = z.object({success: z.literal(true), data: z.array(apiLocationItem), meta: z.object({nextCursor: z.string().nullable().optional(), recordCount: z.number().int().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
};

/**
 * List locations
 * 
 * GET /locations
 */
export const getApiLocations = async (args: GetApiLocationsArgs, options?: GetApiLocationsOptions) => {
const {baseUrl = "https://api.commonroom.io/api/v2", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.locationType != null) query.append("locationType", String(args.locationType))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.cols != null) query.append("cols", String(args.cols))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

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