import {z} from 'zod'

export type SizeEnum = 's' | 'm' | 'l' | 'xl';

export type GetApiV1DemandSurgeArgs = {min_surge_intensity: SizeEnum, date_from: string, 'location.place_id'?: Array<string> | undefined, 'location.origin'?: Array<string> | undefined, 'location.radius'?: string | undefined};

export type GetApiV1DemandSurgeOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const surgeDate = z.object({date: z.string(), phq_attendance_sum: z.number().int()});

export const demandSurgeResponse = z.object({count: z.number().int(), surge_dates: z.array(surgeDate).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
};

/**
 * Get Demand Surges
 * 
 * GET /v1/demand-surge/
 */
export const getApiV1DemandSurge = async (args: GetApiV1DemandSurgeArgs, options?: GetApiV1DemandSurgeOptions) => {
const {baseUrl = "https://api.predicthq.com", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.min_surge_intensity != null) query.append("min_surge_intensity", String(args.min_surge_intensity))
if (args.date_from != null) query.append("date_from", String(args.date_from))
if (args['location.place_id'] != null) query.append("location.place_id", args['location.place_id'].join(','))
if (args['location.origin'] != null) query.append("location.origin", args['location.origin'].join(','))
if (args['location.radius'] != null) query.append("location.radius", String(args['location.radius']))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/demand-surge/${query.size > 0 ? `?${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(demandSurgeResponse, await res.json())
};