import {z} from 'zod'

export type GetApiSchedulingAvailableSlotsArgs = {date?: string | undefined, appointmentTypeId?: string | undefined, appointmentId?: string | undefined, locationId?: string | undefined};

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

export const availableSlotDto = z.object({id: z.string().optional(), startTime: z.string().optional(), endTime: z.string().optional(), providerId: z.string().nullable().optional(), providerName: z.string().nullable().optional(), locationId: z.string().nullable().optional(), locationName: z.string().nullable().optional()});

export const staffAvailableSlotsResponse = z.object({date: z.string().optional(), appointmentTypeId: z.string().nullable().optional(), slots: z.array(availableSlotDto).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
};

/**
 * Free slots on one clinic-local day.
 * 
 * GET /scheduling/available-slots
 */
export const getApiSchedulingAvailableSlots = async (args: GetApiSchedulingAvailableSlotsArgs, options?: GetApiSchedulingAvailableSlotsOptions) => {
const {baseUrl = "https://api.clinicos.vet/backend/business", fetch: fetchFn = fetch, Bearer} = options ?? {}

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

if (args.date != null) query.append("date", String(args.date))
if (args.appointmentTypeId != null) query.append("appointmentTypeId", String(args.appointmentTypeId))
if (args.appointmentId != null) query.append("appointmentId", String(args.appointmentId))
if (args.locationId != null) query.append("locationId", String(args.locationId))
if (Bearer !== undefined) headers.set('authorization', `Bearer ${Bearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/scheduling/available-slots${query.size > 0 ? `?${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(staffAvailableSlotsResponse, await res.json())
};